Posted on November 9, 2014 by Bob Berwyn
It’s all but certain that global warming will result in more frequent life-threatening heatwaves.
How hot will it get?
FRISCO — Life-threatening heatwaves like the blazing Russian summer of 2010 will occur as often as every two years across southern Europe, Africa and the Americas if global warming continues at its present pace.
Climate scientists already know that more heatwaves are one of the most certain consequences of more heat-trapping pollution in the atmosphere, and a new index developed by the European Union’s Joint Research Center provides a way to compare heat waves over space and time. It takes into account both the duration and intensity of heat waves and can serve as a benchmark for evaluating the impacts of future climate change. Continue reading
Filed under: climate and weather, extreme weather, global warming | Tagged: European Union, extreme weather, global warming, heatwaves, Joint Research Center | Leave a comment »
Posted on November 7, 2014 by Bob Berwyn
Is a super storm winding up in the Bering Sea?
Big cyclone to affect weather across North America
FRISCO — Weather watchers are closely tracking what could become the strongest storm on record in the Gulf of Alaska.
What was once Typhoon Nuri is heading into the Bering Sea, west of Alaska, and some forecasters expect the storm’s central low pressure to drop below 930 millibars on Friday night — even lower than Hurricane Sandy’s. The current record stands at 925 millibars from a powerful storm that moved over the Bering Sea on Oct. 25, 1977. Continue reading
Filed under: Arctic, climate and weather, extreme weather, global warming | Tagged: Arctic outbreak, Bering Sea, climate change, extreme weather, Polar vortex, Superstorm Nuri | Leave a comment »
Posted on October 28, 2014 by Bob Berwyn
A new NOAA study tracks the occurrence of seasonal tornadoes across the U.S.
Fewer outbreaks, but more twisters?
FRISCO — Tracking tornado trends is a big deal in the global warming era, as researchers seek to determine whether climate change will result in more catastrophic and life-threatening weather events.
Since the 1950s, researchers say, the overall number of annual tornadoes has remained steady, but a new analysis of data shows there are fewer days with tornadoes each year, but on those days there are more tornadoes.
A consequence of this is that communities should expect an increased number of catastrophes, said lead author Harold Brooks, research meteorologist with the NOAA National Severe Storms Laboratory. Continue reading
Filed under: climate and weather, extreme weather | Tagged: climate, extreme weather, NOAA, tornado numbers, tornado trends, tornadoes | 1 Comment »
Posted on October 15, 2014 by Bob Berwyn
A dust storm engulfs Stratford, Texas in April of 1935. The drought of 1934 was likely made worse by dust storms triggered by the poor agricultural practices of the time.
Credit: NOAA/George E. Marsh Album.
Severe dust storms spawned even more widespread drought, research shows
FRISCO — With all the recent talk of looming megadroughts, the 1934 peak of the Dust Bowl era still remains the most severe and widespread drought in North America during the past 1,000 years, climate scientists say.
Based on tree-ring studies and other physical records, the only other comparable event was way back in the 1500s.
The extent of the 1934 drought was approximately seven times larger than droughts of comparable intensity that struck North America between 1000 A.D. and 2005, and was caused in part by an atmospheric phenomenon that may have also led to the current drought in California, according to a new study. Continue reading
Filed under: climate and weather, Drought, extreme weather, global warming | Tagged: California drought, climate, climate change, drought, Dust Bowl, extreme weather, weather | 1 Comment »
Posted on October 14, 2014 by Bob Berwyn
An extratropical cyclone
North Atlantic pressure variations driving variable pattern
FRISCO — Weather patterns affecting the UK are becoming more volatile, climate researchers concluded in a new study, concluding that the trend is being driven by extreme variations in pressure over the North Atlantic.
The month of December is showing the biggest variation, but contrasting conditions, from very mild, wet and stormy to extremely cold and snowy are a clear sign of less stable weather, University of Sheffield scientists reported in a study published last month in the Journal of Climatology.
Winter weather conditions are commonly defined using the North Atlantic Oscillation, a south-north seesaw of barometric pressure variations over the North Atlantic which determine the strength of the westerly winds that shape North Atlantic weather systems. Continue reading
Filed under: climate and weather, extreme weather, global warming | Tagged: climate, climate change, extreme weather, North Atlantic Oscillation, UK weather | Leave a comment »
Posted on September 30, 2014 by Bob Berwyn
Scientists fine-tuning attribution studies
FRISCO — Australia’s 2013 heatwave was almost certainly fueled by building concentrations of heat-trapping pollution, a global team of researchers said this week, announcing the results of several studies exploring the link between climate change and regional weather patterns.
The new report, published in the Bulletin of the American Meteorological Society, looked at several extreme 2013 weather events in the context of climate, finding a connection to human-caused global warming in some events, but not in others. Continue reading
Filed under: climate and weather, extreme weather, global warming | Tagged: Australia heatwave linked to global warming, California drought, climate attribution studies, extreme weather, global warming, greenhouse gases | Leave a comment »
Posted on September 6, 2014 by Bob Berwyn
Arctic cloud formation still a climate wild card
Sun glints off a sea ice lead in an otherwise heavily ridged ice pack, Canada Basin (Arctic Ocean). Credit: NASA/Sinead Farrell
FRISCO — The ongoing loss of Arctic sea ice is probably already affecting weather and climate in the mid-latitudes of the northern hemisphere. Researchers aren’t exactly sure of how, but there’s been plenty of speculation, mostly focused around changes in the jet stream.
Climate scientists may know a bit more in a few years after they study the results of a new NASA field campaign studying the effect of sea ice retreat on Arctic climate. The Arctic Radiation IceBridge Sea and Ice Experiment (ARISE) will conduct research flights Aug. 28 through Oct. 1, covering the peak of summer sea ice melt. Continue reading
Filed under: Arctic, climate and weather, extreme weather, global warming | Tagged: Arctic sea ice, climate, extreme weather, global warming, NASA | 1 Comment »