New York Times - Sewell Chan
As world leaders prepare to gather in Paris next month to address global warming, their populations generally agree on the need to curb greenhouse gas emissions, but the countries that emit the most carbon dioxide per person are also the ones least worried about climate change, according to a poll released Thursday by the Pew Research Center.
The survey, which sampled people in 40 countries, found that in every nation surveyed, except Pakistan, a majority of respondents supported placing limits on the emissions of gases that are warming the planet. In the United States, 69 percent did; in China, 71 percent; in Nigeria, 77 percent; in Brazil, 88 percent.
Michael E. Mann, a climate scientist at Pennsylvania State University who was not involved in the survey, said the findings were more encouraging than he had expected.
“Whether it is the unprecedented drought in California, devastating floods and hurricanes, extraordinary wildfires, people are now seeing the impact of climate change with their own eyes — they are experiencing its negative consequences now, where they live,” Dr. Mann said. “It is no longer a distant, far-off problem. It is very real, and as a result, a growing majority of the population is demanding action.”
But the intensity of concern about rising temperatures varies significantly across the world, the poll found, hinting at some of the domestic constraints leaders could face in negotiating deals in Paris that may impose short-term costs on their economies. Respondents in the United States, Australia and Russia, among the top carbon polluters per capita, were substantially less alarmed about the problem than their counterparts in India, Kenya and Mexico, which have less industrialized economies.
There were also striking differences in opinion trends. In the United States and France, the proportion of people who say global climate change is a “very serious problem” increased over the past five years, according to the poll. In the United States, 45 percent said the problem was very serious, compared with 37 percent in 2010, while in France the proportion rose to 56 percent from 46 percent over the same period.
By contrast, the proportion of respondents who see the problem as very serious declined over the past five years in China, Japan, Russia, South Korea, Indonesia, Turkey and Argentina, the survey found. In China, the proportion saying the problem was very serious fell to 18 percent from 41 percent. In Japan, it declined to 45 percent from 58 percent.
Fears about climate change were strongest in Latin America and sub-Saharan Africa. In Australia, Britain, China, Germany, Israel and Poland, fewer than 20 percent of respondents said they were very concerned that climate change would personally harm them during their lifetimes; in Brazil, Burkina Faso, Ghana, the Philippines and Uganda, more than 70 percent did.
Despite significant differences in views within and across countries, the poll also found broadly similar patterns. People around the world were far more likely to say that significant lifestyle changes will be necessary to mitigate the effects of climate change than to say that technology alone can solve the problem; even in the technology-oriented United States, the respective figures were 66 percent and 23 percent.
The poll also found general agreement that rich countries should do more than poor countries to shoulder the burden of dealing with the problem, because the former have produced most of the world’s greenhouse gas emissions so far, even though the latter will produce more planet-warming emissions in the years to come.
Drought was the most common concern cited by respondents when asked about the consequences of climate change, followed closely by severe weather. In the United States, anxiety about drought was most prevalent in the West and the Midwest, which have both experienced water shortages in recent years.
The poll found stark partisan divisions in the United States: 68 percent of Democrats considered global climate change to be a very serious problem, compared with 20 percent of Republicans; 82 percent of Democrats support curbs on greenhouse gas emissions, compared with 50 percent of Republicans; 79 percent of Democrats saw a need for lifestyle changes, among Republicans, 55 percent. Substantial partisan divisions on the issue were also identified in Britain, Canada and Australia.
American women (51 percent) were substantially more likely than American men (39 percent) to say that climate change is a very serious problem; that it will affect them personally (36 percent versus 23 percent) and that major lifestyle changes will be required (75 percent versus 57 percent).
Similarly, Americans ages 18 to 29 were far more likely to view global warming as a serious problem — and to think that rich nations should do more to address it — than Americans 50 and older. Less affluent Americans were more worried about it than more prosperous ones. Half of American Catholics, but only one-third of American Protestants, said that climate change was a very serious problem.
The poll asked citizens of five large developing countries whether their governments should develop alternative energy sources, like wind and solar power; expand exploration and production of oil, coal and natural gas; or build more nuclear power plants. Majorities in Brazil (73 percent) and China (51 percent) expressed support for alternative energy sources; in India, 44 percent did. People in Russia and South Africa were more likely to say that all three approaches should be given equal priority.
Although fewer than one in five Chinese expressed serious concern about global warming, more than seven in 10 supported an international treaty to curtail emissions — a striking gap that may reflect both the prominence of recent official pronouncements about emissions controls, as well as the fact that other environmental concerns, like air pollution, tend to dominate public debate in China.
The survey was conducted from March 25 to May 27 among 45,435 respondents in 40 countries. The survey included telephone and face-to-face interviews conducted under the direction of Princeton Survey Research Associates International.
06/11/2015
Climate Change is Moving Mountains
Terminus of the Hubbard Glacier at Resurrection Bay. The ice front is about 300 feet high. Credit: provided by UC's Eva Enkelmann |
For millions of years global climate change
has altered the structure and internal movement of mountain ranges, but
the resulting glacial development and erosion can in turn change a
mountain's local climate. The degree of this cause-and-effect
relationship has never been clearly observed, until now.
Based on research led by University of Cincinnati geologist Eva
Enkelmann in the St. Elias Mountain Range -- located along the Pacific
coastal region of North America -- the way a mountain range moves and
behaves topographically can also change and create its local climate by
redirecting wind and precipitation. The repercussions of these changes
can in turn, accelerate the erosion and tectonic seismic activity of
that mountain range.
Based on her findings, Enkelmann shows clear evidence for a strong relationship between global and local climate change and a mountain's internal tectonic plate shifts and topographic changes.
Enkelmann, an assistant professor in the University of Cincinnati Department of Geology, was among several UC researchers and thousands of geoscientists from around the globe presenting their findings at the 2015 Annual Geological Society of America Meeting, Nov.1-4, in Baltimore.
This research also was published in July in the journal Geophysical Research Letters.
Moving Mountains
"To understanding how mountain structures evolve through geologic time is no quick task because we are talking millions of years," says Enkelmann. "There are two primary processes that result in the building and eroding of mountains and those processes are interacting."
Looking at the St. Elias Mountains in particular, Enkelmann notes how dry it is in the northern part of the mountain range. But the precipitation is very high in the southern area, resulting in more erosion and material coming off the southern flanks. So as the climate change influences the erosion, that can produce a shift in the tectonics. This has been suggested in earlier studies based on numerical and analytical models, however, it had not yet been shown to have occurred over geologic times in the real world.
Enkelmann synthesized several different data sets to show how a rapid exhumation occurred in the central part of the mountain range over four to two million years ago. This feedback process between erosion and internal tectonic shifting resulted in a mass of material moving up toward the surface very rapidly.
Enkelmann's model suggests that global climate shifts triggered a change in the rheology -- the way material behaves.
While Earth was much warmer millions of years ago, glaciers still existed in the high altitudes. However, 2.6 million years ago Earth experienced a shift to a colder climate and glaciation intensified. Existing glaciers grew larger, froze solid, covered the area and did not move.
Enkelmann says the glaciers today are wet-based and are moving, very aggressively eroding material around and out, and in the case of her observation, into the Gulf of Alaska. The tectonic forces (internal plates moving toward one another) continue to move toward Alaska, get pushed underneath and the sediment on top is piling up above the Yakutat plate.
Shake, Rattle and Roll
Adding to the already complex effects of climate change, these processes essentially work against each other.
The movement of glaciers can compete with the internal buildup and develop a feedback process that is very rapid and ferocious. Scientists have suggested that the Himalayas, European Alps and mountains in Taiwan were caused by the same competing reactions as those Enkelmann has observed in southeastern Alaska.
In Enkelmann's observation, the climate-driven erosion can influence the tectonics and change the motion of the rocks in that area. This makes studying the St. Elias Mountain Range particularly ideal because this area is very active tectonically, with strong glacial erosion. As an example, she cites the Great Alaskan Earthquake of 1964 -- the world's second largest earthquake recorded to date -- that also resulted in a tsunami.
"In 1899, there were two big earthquakes in a row, an 8.1 and an 8.2 magnitude, says Enkelmann pointing to a photo of the resulting shoreline lift that still stands today. "These earthquakes resulted in up to 14 meters of co-seismic uplift on the shore, so the shoreline basically popped up 14 meters (45 feet) and it happened immediately.
"Our biggest concern today is the continued potential for earthquakes that can also result in tsunamis," says Enkelmann.
Enkelmann appreciates the challenge of collecting samples here because this range has the highest peaks of any coastal mountain range and is only 20 kilometers from the Pacific Ocean, but she points out that it is a tough area to study because of the big ice sheets.
"So as geologists, we go to the area and take samples and do measurements in the field on the mountain ranges that stick out," says Enkelmann. "One approach is to sample the material that comes out of the glaciers that has transported the eroded sediment and analyze that sediment.
"By going to all of these individual glaciers, we can get a much better understanding of what has happened and what was moved on the entire mountain range."
Based on her findings, Enkelmann shows clear evidence for a strong relationship between global and local climate change and a mountain's internal tectonic plate shifts and topographic changes.
Enkelmann, an assistant professor in the University of Cincinnati Department of Geology, was among several UC researchers and thousands of geoscientists from around the globe presenting their findings at the 2015 Annual Geological Society of America Meeting, Nov.1-4, in Baltimore.
This research also was published in July in the journal Geophysical Research Letters.
Moving Mountains
"To understanding how mountain structures evolve through geologic time is no quick task because we are talking millions of years," says Enkelmann. "There are two primary processes that result in the building and eroding of mountains and those processes are interacting."
Looking at the St. Elias Mountains in particular, Enkelmann notes how dry it is in the northern part of the mountain range. But the precipitation is very high in the southern area, resulting in more erosion and material coming off the southern flanks. So as the climate change influences the erosion, that can produce a shift in the tectonics. This has been suggested in earlier studies based on numerical and analytical models, however, it had not yet been shown to have occurred over geologic times in the real world.
Enkelmann synthesized several different data sets to show how a rapid exhumation occurred in the central part of the mountain range over four to two million years ago. This feedback process between erosion and internal tectonic shifting resulted in a mass of material moving up toward the surface very rapidly.
Enkelmann's model suggests that global climate shifts triggered a change in the rheology -- the way material behaves.
While Earth was much warmer millions of years ago, glaciers still existed in the high altitudes. However, 2.6 million years ago Earth experienced a shift to a colder climate and glaciation intensified. Existing glaciers grew larger, froze solid, covered the area and did not move.
Enkelmann says the glaciers today are wet-based and are moving, very aggressively eroding material around and out, and in the case of her observation, into the Gulf of Alaska. The tectonic forces (internal plates moving toward one another) continue to move toward Alaska, get pushed underneath and the sediment on top is piling up above the Yakutat plate.
Shake, Rattle and Roll
Adding to the already complex effects of climate change, these processes essentially work against each other.
The movement of glaciers can compete with the internal buildup and develop a feedback process that is very rapid and ferocious. Scientists have suggested that the Himalayas, European Alps and mountains in Taiwan were caused by the same competing reactions as those Enkelmann has observed in southeastern Alaska.
In Enkelmann's observation, the climate-driven erosion can influence the tectonics and change the motion of the rocks in that area. This makes studying the St. Elias Mountain Range particularly ideal because this area is very active tectonically, with strong glacial erosion. As an example, she cites the Great Alaskan Earthquake of 1964 -- the world's second largest earthquake recorded to date -- that also resulted in a tsunami.
"In 1899, there were two big earthquakes in a row, an 8.1 and an 8.2 magnitude, says Enkelmann pointing to a photo of the resulting shoreline lift that still stands today. "These earthquakes resulted in up to 14 meters of co-seismic uplift on the shore, so the shoreline basically popped up 14 meters (45 feet) and it happened immediately.
"Our biggest concern today is the continued potential for earthquakes that can also result in tsunamis," says Enkelmann.
Enkelmann appreciates the challenge of collecting samples here because this range has the highest peaks of any coastal mountain range and is only 20 kilometers from the Pacific Ocean, but she points out that it is a tough area to study because of the big ice sheets.
"So as geologists, we go to the area and take samples and do measurements in the field on the mountain ranges that stick out," says Enkelmann. "One approach is to sample the material that comes out of the glaciers that has transported the eroded sediment and analyze that sediment.
"By going to all of these individual glaciers, we can get a much better understanding of what has happened and what was moved on the entire mountain range."
Exxon Mobil Investigated for Possible Climate Change Lies by New York Attorney General
New York Times - Justin Gillis & Clifford Krauss
The New York attorney general has begun a sweeping investigation of Exxon Mobil to determine whether the company lied to the public about the risks of climate change or to investors about how those risks might hurt the oil business.
According to people with knowledge of the investigation, Attorney General Eric T. Schneiderman issued a subpoena Wednesday evening to Exxon Mobil, demanding extensive financial records, emails and other documents.
The investigation focuses on whether statements the company made to investors about climate risks as recently as this year were consistent with the company’s own long-running scientific research.
The sources said the scrutiny would include a period of at least a decade when Exxon Mobil funded outside groups that sought to undermine climate science, even as its in-house scientists were outlining the potential consequences — and uncertainties — to company executives.
Kenneth P. Cohen, vice president for public affairs at Exxon Mobil, said on Thursday that the company had received the subpoena and was still deciding how to respond.
The people with knowledge of the New York case also said on Thursday that, in a separate inquiry, Peabody Energy, the nation’s largest coal producer, had been under investigation by the attorney general for two years over whether it properly disclosed financial risks related to climate change. That investigation has not been previously reported, and has not resulted in any charges or other legal action against Peabody.
An Exxon Mobil refinery in Los Angeles, Calif. The New York attorney general is investigating the oil and gas company. Credit T. Fallon/Bloomberg, via Getty Images |
The New York attorney general has begun a sweeping investigation of Exxon Mobil to determine whether the company lied to the public about the risks of climate change or to investors about how those risks might hurt the oil business.
According to people with knowledge of the investigation, Attorney General Eric T. Schneiderman issued a subpoena Wednesday evening to Exxon Mobil, demanding extensive financial records, emails and other documents.
The investigation focuses on whether statements the company made to investors about climate risks as recently as this year were consistent with the company’s own long-running scientific research.
The sources said the scrutiny would include a period of at least a decade when Exxon Mobil funded outside groups that sought to undermine climate science, even as its in-house scientists were outlining the potential consequences — and uncertainties — to company executives.
Kenneth P. Cohen, vice president for public affairs at Exxon Mobil, said on Thursday that the company had received the subpoena and was still deciding how to respond.
The people with knowledge of the New York case also said on Thursday that, in a separate inquiry, Peabody Energy, the nation’s largest coal producer, had been under investigation by the attorney general for two years over whether it properly disclosed financial risks related to climate change. That investigation has not been previously reported, and has not resulted in any charges or other legal action against Peabody.
Vic
Svec, a Peabody senior vice president, said in a statement, “Peabody
continues to work with the New York attorney general’s office regarding
our disclosures, which have evolved over the years.”
The
Exxon Mobil investigation might expand further to encompass other oil
companies, according to the people with knowledge of the case, though no
additional subpoenas have been issued to date.
The
people spoke on the condition they not be identified, saying they were
not authorized to speak publicly about investigations that could produce
civil or criminal charges.
The Martin Act, a New York state law, confers on the attorney general broad powers to investigate financial fraud.
The Martin Act, a New York state law, confers on the attorney general broad powers to investigate financial fraud.
Mr.
Schneiderman’s decision to scrutinize the fossil fuel companies may
well open a new legal front in the battle over climate change.
To date, lawsuits trying to hold fossil fuel companies accountable for the damage they are causing to the climate have been failing in the courts, but most of those have been pursued by private plaintiffs.
To date, lawsuits trying to hold fossil fuel companies accountable for the damage they are causing to the climate have been failing in the courts, but most of those have been pursued by private plaintiffs.
Attorneys
general for other states could join in Mr. Schneiderman’s efforts,
bringing far greater investigative and legal resources to bear on the
issue. Some experts see the potential for a legal assault on fossil fuel
companies similar to the lawsuits against the tobacco companies in
recent decades, which cost them tens of billions of dollars in
penalties.
“This
could open up years of litigation and settlements in the same way that
tobacco litigation did, also spearheaded by attorneys general,” said
Brandon L. Garrett, a professor at the University of Virginia law
school.
“In some ways, the theory is similar — that the public was misled about something dangerous to health. Whether the same smoking guns will emerge, we don’t know yet.”
In the 1950s and 1960s, tobacco companies financed internal research showing tobacco to be harmful and addictive, but mounted a public campaign that said otherwise, and helped finance scientific research later shown to be dubious.
In 2006, the companies were found guilty of “a massive 50-year scheme to defraud the public.” The history at Exxon Mobil appears to differ, in that the company published extensive research over decades that largely lined up with mainstream climatology. Thus, any potential fraud prosecution might depend on exactly how big a role company executives can be shown to have played in directing campaigns of climate denial, usually by libertarian-leaning political groups.
“In some ways, the theory is similar — that the public was misled about something dangerous to health. Whether the same smoking guns will emerge, we don’t know yet.”
In the 1950s and 1960s, tobacco companies financed internal research showing tobacco to be harmful and addictive, but mounted a public campaign that said otherwise, and helped finance scientific research later shown to be dubious.
In 2006, the companies were found guilty of “a massive 50-year scheme to defraud the public.” The history at Exxon Mobil appears to differ, in that the company published extensive research over decades that largely lined up with mainstream climatology. Thus, any potential fraud prosecution might depend on exactly how big a role company executives can be shown to have played in directing campaigns of climate denial, usually by libertarian-leaning political groups.
For
several years, advocacy groups with expertise in financial analysis
have been warning that fossil fuel companies might be overvalued in the
stock market, since the need to limit climate change might require that
much of their coal, oil and natural gas be left in the ground.
The
sources said the attorney general’s investigation of Exxon Mobil began a
year ago, focusing initially on what the company had told investors
about the risks that climate change might pose to its business.
News
reporting in the last eight months added impetus to the investigation,
the sources said. In February, several news organizations, including The
New York Times, reported
that a Smithsonian researcher who had published papers questioning
established climate science, Wei-Hock Soon, had received extensive funds
from fossil fuel companies, including Exxon Mobil, without disclosing
them. That struck some experts as similar to the activities of tobacco
companies.
More recently, Inside Climate News and The Los Angeles Times
have reported that Exxon Mobil was well aware of the risks of climate
change from its own scientific research, and used that research in its
long-term planning for activities like drilling in the Arctic, even as
it funded groups from the 1990s to the mid-2000s that denied serious
climate risks.
Mr.
Cohen, of Exxon, said on Thursday that the company had made common
cause with such groups largely because it agreed with them on a policy
goal of keeping the United States out of a global climate treaty called
the Kyoto Protocol.
“We
stopped funding them in the middle part of the past decade because a
handful of them were making the uncertainty of the science their focal
point,” Mr. Cohen said. “Frankly, we made the call that we needed to
back away from supporting the groups that were undercutting the actual
risk” of climate change.
“We
recognize the risk,” Mr. Cohen added. He noted that Exxon Mobil, after
an acquisition in 2009, had become the largest producer of natural gas
in the United States. Because natural gas creates far less carbon
dioxide than coal when burned for electricity, the company expects to be
a prime beneficiary of President Obama’s plan to limit emissions. Exxon
Mobil has also endorsed a tax on emissions as a way to further reduce
climate risks.
Whether
Exxon Mobil began disclosing the business risks of climate change as
soon as it understood them is likely to be a major focus of the New York
case. The sources said the investigators for the attorney general were
poring through the company’s disclosure filings since the 1970s, but
were focusing in particular on recent statements to investors.
Exxon
Mobil has been disclosing such risks in recent years, but whether those
disclosures were sufficient has been a matter of public debate.
Last year, for example, the company warned
investors of intensifying efforts by governments around the world to
limit emissions. “These requirements could make our products more
expensive, lengthen project implementation times, and reduce demand for
hydrocarbons, as well as shift hydrocarbon demand toward relatively
lower-carbon sources such as natural gas,” the company said at the time.
But in another recent report,
Exxon Mobil essentially ruled out the possibility that governments
would adopt climate policies stringent enough to force it to leave its
reserves in the ground, saying that rising population and energy demand
around the world would prevent that.
“Meeting these needs will require all economic energy sources, especially oil and natural gas,” the company said.
“Meeting these needs will require all economic energy sources, especially oil and natural gas,” the company said.
Wall
Street analysts on Thursday were uncertain whether the case would
inflict long-term damage on the company, which has already suffered from
a plunge in commodity prices, like other oil and gas producers.
“This
is not good news for Exxon Mobil or Exxon Mobil shareholders,” said
Fadel Gheit, a senior oil company analyst at Oppenheimer & Company.
“It’s a negative, though how much damage there will be to reputation or
performance is very hard to say.”
Brian Youngberg, senior energy analyst at Edward Jones, said, “There is headline risk, but the actual financial impact will not affect the company for a long time, if ever. I think there will be a modest overhang.”
Exxon Mobil shares closed at $84.81, down 1.4 percent.
Brian Youngberg, senior energy analyst at Edward Jones, said, “There is headline risk, but the actual financial impact will not affect the company for a long time, if ever. I think there will be a modest overhang.”
Exxon Mobil shares closed at $84.81, down 1.4 percent.
'The Blob' Warm Pool in The Pacific May Prolong Life of Monster El Nino
Fairfax - Peter Hannam
The powerful "Great Godzilla" El Nino in the Pacific may last as much as two months longer than expected because of another unusual climate phenomenon scientists have nick-named "The Blob".
First observed in 2013, the huge "blob" of abnormally warm water extends from the Californian coast far into the Pacific. (See chart below from US National Oceanic and Atmospheric Administration.)
One effect is that the winds that blow westward during
an El Nino are much further north than they would normally be at this
time in the event's cycle, researchers in the US and Australia say.
The powerful "Great Godzilla" El Nino in the Pacific may last as much as two months longer than expected because of another unusual climate phenomenon scientists have nick-named "The Blob".
First observed in 2013, the huge "blob" of abnormally warm water extends from the Californian coast far into the Pacific. (See chart below from US National Oceanic and Atmospheric Administration.)
It's going to make the battery last longer, that's for sure.
Dr Wenju Cai, principal research scientist, CSIRO
This year's big El Nino may linger longer than expected. Photo: Timothy Connell |
This year's El Nino already ranks among the most powerful in
history. Its impacts range from bushfires blanketing Indonesia in
smoke, droughts in Papua New Guinea and heatwaves across southern
Australia, to floods in the Americas as winds and rainfall patterns
shift.
"The funny thing with this El Nino is the same wind anomaly that we would have expected on the Equator is sitting north of the equator," Axel Timmermann, a professor of oceanography at the University of Hawaii told Fairfax Media.
"The north Pacific is so much warmer than the south
Pacific, and typically around this time or a month from now, the wind
anomalies should already have moved to the south [of the Equator]."
Those westward winds are currently blowing about 5-7 degrees north of the Equator, with southerly surges flows from near Australia providing some of their power. (See NOAA chart below.)
Wenju Cai, a principal research scientist with the CSIRO who has published widely on how climate change will likely make extreme El Ninos more common, said the timing of these winds is particularly unusual and will likely prolong the event.
"This pattern is often one of the features of an extreme event but I didn't expect it to last until now," Dr Cai said.
"This pattern is good for charging the heat in the Pacific," he said. "It's going to make the battery last longer, that's for sure."
'Strongest in a generation'
Mike McPhaden, a senior NOAA scientist, said the current El Nino is "the strongest in a generation and it continues to grow in its amplitude".
As the Bureau of Meteorology chart below shows, recent westerly wind bursts have triggered a further rise in abnormally warm temperates in a key region of the Pacific.
The 2.3-degree anomaly is still shy of the record 2.8 degrees recorded in 1997-98, but it is predicted to rise further before the event peaks late this year, the bureau said.
Dr
McPhaden cautioned that the El Nino's demise is hard to predict five to
six months out, noting the 1997-98 event broke down within a matter of
weeks in May 1998.
The Blob, though, had made this El Nino particularly unusual because it had abnormal differences in temperatures between the north and south Pacific.
"How this will affect what's happening on the Equator is a very interesting question," Dr McPhaden said.
"I'm not sure we understand that yet," he said. "It's quite possible it could lead to some prolongation of the event."
La Nina switch
The extreme weather events associated with this El Nino are already straining the resources in countries such as Papua New Guinea or cyclone-hit Vanuatu in the Pacific.
Any extension would likely add to the misery and stretch economies and ecosystems further.
Dr Cai said the El Nino, based on US definitions, could last until May, June or even July.
Professor Timmermann said University of Hawaii's own seasonal forecasting models show "there is some indication this El Nino will last two months longer on average than the 1997 event".
Since El Ninos tend to flip into La Ninas - when Pacific trade winds revert back to be easterlies but intensify - many nations could be in for extreme conditions the other way.
China, for instance, may shift within a few months from excessively dry to abnormally wet weather.
"This is a recipe for big floods in China: a huge El Nino which drives dry conditions and then a switch to a La Nina," Dr Cai said.
"The longer it lasts, if it is to switch into a La Nina, the faster it has to do it," he said.
While El Nino years generally have relatively few tropical cyclones making landfall in Australia but La Nina years typically have more such super storms than usual.
"The funny thing with this El Nino is the same wind anomaly that we would have expected on the Equator is sitting north of the equator," Axel Timmermann, a professor of oceanography at the University of Hawaii told Fairfax Media.
Indonesia's annual burning season has been made worse by the El Nino-linked drought. Photo: Getty Images |
Those westward winds are currently blowing about 5-7 degrees north of the Equator, with southerly surges flows from near Australia providing some of their power. (See NOAA chart below.)
Farmers have been doing it tough because of a dry winter and much of spring across much of Australia. Photo: Justin McManus |
"This pattern is often one of the features of an extreme event but I didn't expect it to last until now," Dr Cai said.
"This pattern is good for charging the heat in the Pacific," he said. "It's going to make the battery last longer, that's for sure."
Floods in Pakistan in July 2015. A switch from El Nino to a La Nina may mean floods for China and elsewhere. Photo: AP |
Mike McPhaden, a senior NOAA scientist, said the current El Nino is "the strongest in a generation and it continues to grow in its amplitude".
As the Bureau of Meteorology chart below shows, recent westerly wind bursts have triggered a further rise in abnormally warm temperates in a key region of the Pacific.
The 2.3-degree anomaly is still shy of the record 2.8 degrees recorded in 1997-98, but it is predicted to rise further before the event peaks late this year, the bureau said.
The Blob, though, had made this El Nino particularly unusual because it had abnormal differences in temperatures between the north and south Pacific.
"How this will affect what's happening on the Equator is a very interesting question," Dr McPhaden said.
"I'm not sure we understand that yet," he said. "It's quite possible it could lead to some prolongation of the event."
La Nina switch
The extreme weather events associated with this El Nino are already straining the resources in countries such as Papua New Guinea or cyclone-hit Vanuatu in the Pacific.
Any extension would likely add to the misery and stretch economies and ecosystems further.
Dr Cai said the El Nino, based on US definitions, could last until May, June or even July.
Professor Timmermann said University of Hawaii's own seasonal forecasting models show "there is some indication this El Nino will last two months longer on average than the 1997 event".
Since El Ninos tend to flip into La Ninas - when Pacific trade winds revert back to be easterlies but intensify - many nations could be in for extreme conditions the other way.
China, for instance, may shift within a few months from excessively dry to abnormally wet weather.
"This is a recipe for big floods in China: a huge El Nino which drives dry conditions and then a switch to a La Nina," Dr Cai said.
"The longer it lasts, if it is to switch into a La Nina, the faster it has to do it," he said.
While El Nino years generally have relatively few tropical cyclones making landfall in Australia but La Nina years typically have more such super storms than usual.
University of NSW Scorcher Website Keeping Track of Heatwaves in Australia
Fairfax - Peter Hannam
Unusual El Nino may stick around: Fairfax's Peter Hannam explains why this year's El Nino has confused some scientists and may last longer than usual.
A couple of cool days, it seems, is all it takes to forget we're in the midst of Sydney's hottest years on record.
Who remembers, for instance, that last month included the earliest trio of consecutive days of 32 degrees or warmer weather ever recorded in the city?
Or that average overnight temperatures exceeded any previous October by a full 1 degree, according to the Bureau of Meteorology.
Unusual El Nino may stick around: Fairfax's Peter Hannam explains why this year's El Nino has confused some scientists and may last longer than usual.
A couple of cool days, it seems, is all it takes to forget we're in the midst of Sydney's hottest years on record.
Who remembers, for instance, that last month included the earliest trio of consecutive days of 32 degrees or warmer weather ever recorded in the city?
There's only one place to go in the middle of a heatwave. Photo: James Alcock |
Unusual heat can be harder still to recall when it lands during cooler months, as in the 12-day heatwave in May 2014, the longest of any recorded.
While unseasonably warm weather can be blissful, it can throw agriculture and nature more generally out of kilter, Sarah Perkins-Kirkpatrick, a heatwave expert at the University of NSW, said. During warmer months, the impact on health can be severe.
"Sometimes even short, sharp heat spikes can have an impact," Dr Perkins-Kirkpatrick said.
Keeping track of heatwaves in Sydney, or at dozens of sites across Australia, has now been made a lot easier thanks to a revamp of UNSW's Scorcher website.
"People might think 'It's really hot today', but what did this date look like a year or 10 years ago?", she said.
Abnormal warmth in Sydney - based on two or more consecutive days in the top 10 per cent of records for the specific date - can be identified in any year going back to 1910.
Here's how the May 2014 event appears with the solid red line spiking above the long-term trend:
The use of historic data also helps to highlight how heatwaves have become more common, as background warming from climate change makes such events much more likely.
New research by Dr Perkins-Kirkpatrick published on Friday by the American Meteorological Society found that the May 2014 event - which lasted 19 days at a national level - was 23 times more likely because of human activity such as burning fossil fuels.
"Not every year is going to be hotter than every previous year," she said. But for most Australian sites - particularly in the east and south, heatwaves are becoming more intense, more frequent and last longer."
That's something worth keeping in mind on the next chilly day.
While unseasonably warm weather can be blissful, it can throw agriculture and nature more generally out of kilter, Sarah Perkins-Kirkpatrick, a heatwave expert at the University of NSW, said. During warmer months, the impact on health can be severe.
Heatwaves can come at anytime - even during normally cooler months of the year. Photo: UNSW |
Keeping track of heatwaves in Sydney, or at dozens of sites across Australia, has now been made a lot easier thanks to a revamp of UNSW's Scorcher website.
"People might think 'It's really hot today', but what did this date look like a year or 10 years ago?", she said.
How to tell if you're in the middle of heatwave. Photo: Janie Barrett |
Abnormal warmth in Sydney - based on two or more consecutive days in the top 10 per cent of records for the specific date - can be identified in any year going back to 1910.
Here's how the May 2014 event appears with the solid red line spiking above the long-term trend:
The use of historic data also helps to highlight how heatwaves have become more common, as background warming from climate change makes such events much more likely.
New research by Dr Perkins-Kirkpatrick published on Friday by the American Meteorological Society found that the May 2014 event - which lasted 19 days at a national level - was 23 times more likely because of human activity such as burning fossil fuels.
"Not every year is going to be hotter than every previous year," she said. But for most Australian sites - particularly in the east and south, heatwaves are becoming more intense, more frequent and last longer."
That's something worth keeping in mind on the next chilly day.