Rains that are like historical flood stories, heat waves that don’t end, tornadoes that strike in avenging swarms—there’s been a global change in the weather lately. What’s going on?
Saturday, March 29, 2014
Climate Denial Crock of the Week
Tuesday, March 11, 2014
New NASA Study Warns Of Climate Change’s Pace
CAPE CANAVERAL (CBSMiami) – NASA jumped back into the discussion of global climate change Tuesday with a new study that showed Earth’s climate will experience roughly 20 percent more warming than estimates originally stated, despite a recent slowdown.
NASA said the new predictions were based on more detailed calculations of the sensitivity of Earth’s climate to factors like greenhouse gas emissions, which help warm the planet.
Global temperatures have risen at a rate of 0.22 degrees Fahrenheit per decade since 1951. But according to NASA, since 1998 the rate slowed to 0.09 per decade, despite an increase in some greenhouse gases like carbon dioxide.
Some studies have since suggested greenhouse gases may not impact Earth as much as previously thought. The Intergovernmental Panel on Climate Change agreed and slightly lowered the range of Earth’s potential warming.
The new research focused on what’s called Earth’s “transient climate response.” This measurement looks at how temperatures will change as carbon dioxide increases until the total amount of carbon dioxide has doubled.
Previous estimates put the transient climate response at anywhere from 1.8 degrees to 2.52 degrees Fahrenheit. According to NASA’s new study, the transient climate response is approximately 3.06 degrees and not likely to fall below 2.34 degrees Fahrenheit.
The study focused on looking at how aerosols from natural sources like volcanoes and wildfire combined with manufacturing activities, cars, and energy production interacted. NASA said depending on the make-up of the aerosols, some cause warming and some cause cooling.
According to the study, the Northern Hemisphere will likely see more of an impact from aerosols as most man-made aerosols are released from industrial zones north of the equator and most of Earth’s landmasses are in the Northern Hemisphere.
“I kept thinking, we know the Northern Hemisphere has a disproportionate effect, and some pollutants are unevenly distributed,” the study’s author, climatologist Drew Shindell said. “But we don’t take that into account. I wanted to quantify how much the location mattered.”
Shindell said that based on his calculations, industrialized countries must reduce greenhouse gas emissions at the higher end of proposed restrictions to avoid the most damaging consequences of climate change. More
Wednesday, March 5, 2014
Extreme weather is 'silver lining' for climate action: Christiana Figueres
Devastating extreme weather including recent flooding in England, Australia's hottest year on record and the US being hit by a polar vortex have a "silver lining" of boosting climate change to the highest level of politics and reminding politicians that climate change is not a partisan issue, according to the UN's climate chief. Christiana Figueres said that it was amoral for people to look at climate change from a politically partisan perspective, because of its impact on future generations.
The "very strange" weather experienced across the world over the last two years was a sign "we are [already] experiencing climate change," the executive secretary of the UN climate secretariat told the Guardian.
The flooding of thousands of homes in England because of the wettest winter on record has brought climate change to the forefront of political debate in the UK. The pprime minister, David Cameron, when challenged by Labour leader, Ed Miliband, on his views on man-made climate change and having climate change sceptics in his cabinet, said last week: "I believe man-made climate change is one of the most serious threats that this country and this world faces."
Climate change was barely mentioned at all in the 2012 US election battle until superstorm Sandy struck New York, prompting the city's then mayor, Michael Bloomberg, to endorse Barack Obama's candidacy because he would "lead on climate change."
Figueres said: "There's no doubt that these events, that I call experiential evidence of climate change, does raise the issue to the highest political levels. It's unfortunate that we have to have these weather events, but there is a silver lining if you wish, that they remind us is solving climate change, addressing climate change in a timely way, is not a partisan issue."
She added: "We are reminded that climate change events are for everyone, they're affecting everyone, they have much, much longer effects than a political cycle. Frankly, they're intergenerational, so morally we cannot afford to look at climate change from a partisan perspective."
Figueres said that examples of recent extreme weather around the world were a sign climate change was here now. "If you take them individually you can say maybe it's a fluke. The problem is it's not a fluke and you can't take them individually. What it's doing is giving us a pattern of abnormality that's becoming the norm. These very strange extreme weather events are going to continue in their frequency and their severity … It's not that climate change is going to be here in the future, we are experiencing climate change."
Figueres was speaking in London before meeting businesses including Unilever, Lafarge and Royal Dutch Shell to urge them to put pressure on governments to take action on climate change, ahead of renewed international negotiations in Bonn next week to flesh out details of a draft climate treaty to be laid out in Lima this year and agreed in Paris at the end of 2015.
"2014 is a crucial year because of the timing of next year, [in 2015] there will be very little time work on the actual agreement. We have to frontload the work," she said.
Peru's foreign minister told the Guardian in January that the Lima meeting in December must produce a first draft of a deal to cut carbon emissions, which will be the first of its kind after efforts to get legally binding agreement for cuts from most of the world's countries failed at a blockbuster meeting in Copenhagen in 2009.
Asked if a bad deal was better than no deal next year, she said: "Paris has to reach a meaningful agreement because, frankly, we are running out of time."
But she dismissed parallels with the run-up to the Copenhagen summit, saying the frequency of extreme weather events, lower renewable energy costs and progress on climate legislation at a national level meant it was different this time round.
"I hope that we don't need too many more Sandys or Haiyans or fires in Australia or floods in the UK to wake us up. My sense is there is already much momentum.We have 66 governments that have climate legislation, we have a total of 500 laws around the world on climate, whereas before Copenhagen we only had 47."
But the grouping of the world's 47 "least developed" countries said this week that they would want far more money to adapt their economies to climate change than the $100bn a year that been so far proposed by rich countries.
"We will want more than the $100bn to agree to a new Paris protocol," said Quamrul Choudhury, a lead negotiator for the group which includes many African and Asian countries. "On top of that we will want a legal mechanism to compensate for 'loss and damage' [compensation for extreme climate change events]. There should definitely be some space in the [final] treaty for that," he said in London.
He called on rich countries to compromise. "The battle lines are drawn. Everyone wants to defend their country and nobody will give an inch, but everyone has to make some sacrifice or we won't have a deal. We need high-level political commitment to raise ambition."
Choudhury, who is also Bangladesh's climate envoy to the United Nations, met British climate negotiators ahead of the Bonn talks. "I am optimistic that the world can avoid another diplomatic disaster like Copenhagen in 2009. There have been major changes since then. In 2008-09 we knew it would be very expensive to reduce emissions. Now we know it does not cost very much. It's not expensive, not a Herculean task. Countries like the UK know they can reduce emissions by 65% without it costing very much at all.
"But even if we have an ambitious mitigation target [to cut emissions] adaptation must be the cornerstone of a new treaty. This is not a zero-sum game. If we treat it like that there will be no Paris protocol," he said.
Figueres later agreed that the $100m proposed in 2009 as compensation for poor countries would not be enough for them to build defences and adapt their economies. "It was a figure plucked from a hat … $100bn is not enough [to meet] the mitigation and not at all for the adaptation costs. The International Energy Agency has suggested it may cost $1 trillion over 25 years just for adaptation. $100bn is a freckle on the map of what needs to be invested."
A major UN climate science panel report to be published at the end of this month will spell out the impacts of climate change on humanity and the natural world.Leaked versions of the report say agricultural production will decline by up to 2% every decade for the rest of the 21st century. More
Tuesday, January 28, 2014
Rare snow, ice storm sends shock throughout Deep South
ATLANTA — A Midwest winter storm roared into the the Deep South on Tuesday, bringing icy rain and sleet to South Texas and threats of a dangerous ice storm and power outages from Louisiana to the Virginia coast.
At the same time, intense cold continued its onslaught across the north-central and northeastern U.S., with wind chill warnings and advisories in place all the way from Montana to Maine.
In the South, snow fell on Alabama-Georgia border Tuesday morning, moving quickly into northwest Atlanta suburbs. Forecasts called for up to a foot of snow in Virginia Beach, Norfolk, Portsmouth and Chesapeake in Virginia and up to 10 inches along much of the North Carolina coast.
Delta Airlines, with headquarters in Atlanta, said 1,850 flights have been canceled systemwide Tuesday beginning at 11 a.m. ET. Of that number, 840 flights from Atlanta were affected.
In the Atlanta area, which was bracing for up to 2 inches of snow, several school systems canceled classes or announced early closings.
“We have preparations from a couple of other close calls the past few weeks,” said Mark McKinnon, a spokesman for the Georgia Department of Transportation. “They’ve just got to come in and crank it up.”
He said crews would likely come in at noon Tuesday and begin pretreating bridges with a salt-brine mixture, and then be on call to battle snow and ice with salt and pea-sized gravel.
The threat of icy roads was particularly alarming in southern cities unequipped for such rare weather, including Austin, Charleston, S.C., Pensacola, Fla., Mobile, Ala., and New Orleans.
“This is a very dangerous situation because snow and ice are very rare for extreme southern Mississippi,” said Robert Latham, executive director of the Mississippi Emergency Management Agency. “We need everyone to have an emergency plan together for this.”
Louisiana Gov. Bobby Jindal declared a state of emergency in the Pelican State because of the threat of heavy snow plus freezing temperatures that could paralyze most roadways.
“It’s important people start preparing now for the storm,” Jindal said late Monday. “We are working to keep open major corridors across the state, but only for those who absolutely must travel.”
In Columbia, S.C., Fort Jackson planned to stop normal operation at mid-morning and keep on only essential personnel.
In Savannah, which is expecting a wintry mix of snow and freezing rain, schools have been closed and residents were “making a run” on grocery stores, said Bret Bell, a city spokesman. He said the main concern was not so much snow as icing on roads.
Appalachian Power asked its customers in Tennessee, Virginia and West Virginia to conserve electricity and minimize the threat of power disruptions during the cold snap.
The utility says PJM Interconnection, which operates the electricity grid for 13 states and the District of Columbia, has issued a call for voluntary conservation on Tuesday because of expected high demand.
The harsh cold pushing into the South is an extension of the hard freeze that has gripped the Midwest for days. Schools in Chicago are closed for a second day.
In Minnesota, most metro schools and the University of Minnesota are closed as wind chills were expected to drop as low as 35 to 50 degrees below zero.
The state was also struggling with a short supply of natural gas in some parts due to a Canadian pipeline explosion.
Xcel Energy asked all customers, including in the Twin Cities, to cut back on natural gas use and hold their home thermostats at 60 degrees. More
Saturday, August 31, 2013
Ten Years of Weather History in Three Minutes
NOAA GEOS-12 satellite was decommissioned on August 16 after 3788 days in service. Here is ten years showing some of the planets extreme weather during this period.
Monday, August 19, 2013
Weather-related losses take their toll
August 19th 2013 8:00 AM Extreme weather events are taking their toll on the insurance industry even though midway through August the North Atlantic has yet to see its first hurricane of the year.
So far there have been five tropical storms including the currently active system Tropical Storm Erin, which is expected to dissipate in the mid-Atlantic.
But while there have been no hurricanes to wreak economic losses, there have been plenty of weather-related events elsewhere to keep risk managers and (re)insurance executives on their toes.
Zurich Insurance Group reported on Thursday a sharp decline in its second-quarter profits, mainly due to weather-related losses in Europe. The company’s net income fell 27 percent to $789 million.
Other insurers and reinsurers are counting the cost of this year’s severe weather-related events.
The major economies of the US, China and Canada have all suffered billions of dollars of losses as a result of severe weather, flooding and — in the case of China — earthquakes.
Strong thunderstorms and rain across the greater Toronto metropolitan region last month caused significant flooding and power outages, which affected businesses, vehicles and infrastructure. Economic losses from that single event have been estimated by AON Benfield at $1.45 billion, with around half of that cost covered by insurance. There was further severe weather in Ontario and Quebec provinces during July, with winds gusting up to 100mph during intense thunderstorms, which caused millions of dollars in insured losses.
Even before July, Canada had already suffered severe weather and flooding. Floods that occurred between June 19 and 24 claimed four lives and caused economic losses of $5.3 billion.
The insurance arm of Canada’s TD Bank Group expected claims costs from the severe weather in Alberta and Toronto to have a pre-tax impact of approximately $170 million after reinsurance.
Group president Ed Clark, in a statement to investors last month, said: “While banks and insurance companies can incur losses from severe weather events, our greatest concern is with the communities and individuals who experienced the devastation in Alberta and the GTA (Greater Toronto Area). We also thank our employees for their efforts to support our customers through these events, when many employees themselves were dealing with the impact.”
In the US weather-related losses have also been significant since the start of the year, with the Plains, Midwest and Northeast suffering economic losses of $6.5 billion in two bouts of severe weather in May and June.
For China it has been worse. During July torrential rainfall across many parts of the country brought floods that claimed the lives of almost 200 people and caused economic losses of more than $7 billion. A magnitude 5.9 earthquake on July 22 in the Gansu Province killed at least 95, damaged 80,000 homes and caused economic losses of $3.25 billion. Since the start of the year China has suffered economic losses due to a number of smaller earthquakes and weather-related events, by far the most significant is the $6 billion loss attributed to drought conditions in parts of the country since January 1.
Europe, Asia, Africa and South America have all suffered weather-related economic losses. A drought in Brazil between January and June caused losses estimated at $8.5 billion, while flooding in central Europe in May and June caused economic losses of $22 billion.
In the aftermath of the devastating floods in Europe, Peter Höppe, head of Munich Re’s Geo Risks Research unit, said: “It is evident that days with weather conditions that lead to such flooding are becoming more frequent and that such weather systems tend to remain stationary for longer. With this higher persistence of weather patterns, the potential for heavy and long-lasting precipitation within a trough situation, for example, increases. The counterpart to this are stationary high-pressure systems which in summer increase the risk of heatwaves and periods of drought.
“Debate in climate research is currently focusing on what the causes of such changes in weather patterns could be and what role climate change might play in this. But it is naturally not possible to explain single events on this basis.”
Even places as remote as the Azores archipelago have not escaped the wrath of the weather. In March the North Atlantic island group took a $45 million economic hit, with more than 500 properties damaged and three lives lost after days of heavy rain lashed the island of Terceira causing severe flooding.
Significant economic losses during July:
US (Severe weather) $175m+
Canada (Severe weather) $1.45b+
China (Flooding) $7b+
Significant economic loss events (January to June 2013):
US (Severe weather May 18-22) $4.5b+
Canada (Flooding June 19-24) $5.3b+
Brazil (Drought Jan 1-May 31) $8.3b+
Europe (Flooding May 30-June 15) $22b+
China (Drought Jan 1-July 31) $6b+
* Economic loss figures from AON Benfield’s Global Catastrophe Recap.
Friday, July 26, 2013
Global warming and the future of storms
New research by Kerry Emanuel suggests that hurricanes will become more frequent and more intense
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| Dr. Kerry Emanuel |
We know that changes we are making to the Earth's climate will (and currently are) affecting weather. Some of the impacts are clear to see and easy to quantify. For instance, in some regions, droughts are becoming more severe and longer lasting, while in other locations, the opposite is occurring – more precipitation is falling in heavier downbursts. Two competing issues have to be considered. First, increased temperatures are increasing evaporation rates i.e., drying is occurring. Second, increased temperatures lead to more water vapor in the atmosphere, which results in heavier rain/snow events. In regions that are currently dry, the first issue dominates, whereas in wet regions, the second is more important.
Despite these competing effects, scientists can detect changes in the drying/wetting patterns around the globe, and these are linked to human emissions.
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| Typhoon Sanba |
For other weather patterns, the evidence is not as clear. For instance for tornadoes, our observations just aren't good enough to make categorical conclusions. Reliable records in the U.S. started in the early 1950s, but since then, there have been improvements in our sensing instruments, which makes it difficult to assess long-term trends.
A similar situation exists for hurricanes and cyclones. We are more able to observe and quantify these storms now, so we have to ask whether increases in these storms is caused by global warming, by improved measurements, or by both. Similarly, we have had very destructive storms in the U.S. recently, but is the damage due to more powerful storms or increased infrastructure in storm areas?
One useful tool that can help answer these questions are climate models. Climate models are like virtual reality computer programs. You can input today's conditions (wind speed, temperatures, pressures, etc.) and predict what will happen in the future. Today's weather forecasts use similar prediction tools. In some respects, "climate" computer programs and "weather" computer programs are different, but there are some clear similarities. "Weather" prediction programs try to give short-term prognostications of local weather a few days into the future. "Climate" predictions attempt to describe long-term trends in large-scale climate patterns years and decades into the future.
So, how can computer programs help us answer the hurricane/cyclone question? With the help of the program, a scientist can play "what if" scenarios and see how future storms will change. What if greenhouse gases increase? What if ocean temperatures increase? What if wind speeds change? How will these things affect the number and strength of hurricanes?
Very recently, a publication appeared by perhaps the world's best-known hurricane scientist, Dr. Kerry Emanuel of MIT. Dr. Emanuel combined global computer simulations with more regional simulations to look into the future at the evolution of storms. What he found was surprising. Because the storms will become stronger and more numerous, within the next century, the power dissipated by future storms will increase by about 50 percent. What was particularly interesting was that his findings show increases in both strong and weaker cyclones.
I asked Dr. Emanuel to summarize the present understanding of hurricanes, and he responded with the following insights:
• The incidence of high-intensity tropical cyclones (Safir-Simpson categories 3-5) should increase, and the amount of rainfall in these storms should increase, upping the potential for freshwater flooding. These changes will not necessarily occur where tropical cyclones develop and thrive today. "Indeed," wrote Emanuel, "it is likely that there will be decreasing activity in some places, and increasing activity in others; models do not agree on such regional changes."
• Though experts disagree on this point, Emanuel's work suggests that weak events (tropical storms and Cat 1-2 storms) will become more frequent.
• "Very little work has been done on the problem of storm size," wrote Emanuel, "what little research has been done suggests that storm diameters may increase with global temperature. This can have a profound influence on storm surges, which are the biggest killers in tropical cyclone disasters. " More






