Posted on May 15, 2015 by Bob Berwyn
‘We should no longer accept the claim that there is warming missing higher in the atmosphere’
All of South America, nearly all of North America, as well as Eurasia, were much warmer than average in April 2015.
FRISCO — Decades of readings from thousands of measuring stations around the world show in excruciating detail how the Earth is warming under its thickening blanket of greenhouse gases, but tracking the temperature rise in the upper levels of the atmosphere has been more elusive.
But new research by Australian climate scientists, published in Environmental Research Letters, confirms strong warming in the upper troposphere, crushing yet another argument used by science-denying global warming skeptics who try to cast doubt on the overwhelming evidence of dangerous climate change.
The findings are based on a new analysis of data from the global weather balloon network. The evaluation found “clear indications of warming in the upper troposphere,” according to professor Steve Sherwood, with the ARC Centre of Excellence for Climate System Science. Continue reading
Filed under: climate and weather, climate change, Environment, global warming | Tagged: climate science, Environment, global warming, global warming deniers, troposphere hotspot, tropospheric global warming | Leave a comment »
Posted on May 13, 2015 by Bob Berwyn
Larsen C Ice Shelf has dwindled by 4 meters in 15 years
Melting ice shelves in Antarctica will speed the rate of sea level rise. @bberwyn photo.
FRISCO — One of Antarctica’s giant ice shelves has thinned by more than 12 feet in the past 15 years and could collapse within the next 100 years — or possibly sooner and without much warning, according to scientists with the British Antarctic Survey.
The new study was focused on trying to determine why the Larsen C Ice Shelf is melting away. The ice shelf is along the east coast of the Antarctic Peninsula, one of the fastest warming regions on Earth, with a temperature rise of 2.5 degrees Celsius during the last 50 years. Continue reading
Filed under: Antarctica, climate and weather, Environment, global warming | Tagged: British Antarctic Survey, climate change, global sea level rise, global warming, Larsen C Ice Shelf | 2 Comments »
Posted on May 7, 2015 by Bob Berwyn
Arctic sea ice extent tracking low in April 2015.
New satellite data offers better info on ice thickness
FRISCO — After peaking at a record low extent last month, Arctic sea ice is melting away.
The average sea ice extent for the month of April was the second-lowest on record, behind 2007, about 313,000 square miles smaller than the 1981 to 2010 long-term average, according to the latest monthly update from the National Snow and Ice Data Center. Read the full update here. Continue reading
Filed under: Arctic, climate and weather, climate change, global warming | Tagged: Arctic sea ice, arctic sea ice thickness, climate change, global warming | 1 Comment »
Posted on May 6, 2015 by Bob Berwyn
Irrevocable climate change ahead for Planet Earth
FRISCO — For the first time since people started keeping track of such things, the concentration of heat-trapping carbon dioxide in the atmosphere was above 400 parts per million for an entire month.
Climate scientists say the readings from March 2015 are another significant milestone along the path to a dangerously overheated world, as carbon dioxide and other heat-trapping pollution continue drive global warming. Continue reading
Filed under: climate and weather, Environment, global warming | Tagged: carbon dioxide, climate change, CO2, CO2 400 ppm, Environment, global CO2 average, global warming | Leave a comment »
Posted on May 6, 2015 by Bob Berwyn
Heat shifts from Far West to Southeast
Much of the U.S. was warmer than average in April 2015.
FRISCO — Last month ended up as the 17-warmest April on record, with an average temperature for the 48 contiguous states at 53.1 degrees Fahrenheit, making it the warmest April since 2012, according to the new monthly State of the Climate summary from NOAA’s National Climatic Data Center. Continue reading
Filed under: climate and weather, El Niño, extreme weather, global warming | Tagged: April 2015 temperature records, climate, climate change, Environment, global warming | 1 Comment »
Posted on May 5, 2015 by Bob Berwyn
Fjords like this one in Iceland may play an important role in regulating atmospheric carbon dioxide. @bberwyn photo.
Deep, cold and oxygen-starved, fjords may keep organic carbon from entering the atmosphere for many centuries
FRISCO — The majestic fjords of the far north may have played a key role in buffering the atmosphere against variations in carbon dioxide levels associated with rapid climate change at the beginning and end of past ice ages.
A study by New Zealand scientists estimates that fjords capture and store about 18 million tons of organic carbon each year. That’s equal to about 11 percent of annual marine carbon capture globally, said Dr. Candida Savage of New Zealand’s University of Otago, after publishing her findings in the journal Nature Geoscience. Continue reading
Filed under: climate and weather, climate change, Environment | Tagged: carbon dioxide, carbon sequestration, climate change, fjords, global warming, ocean carbon cycle, organic carbon | Leave a comment »
Posted on May 4, 2015 by Bob Berwyn
Feed the world, and cut greenhouse gases? It can be done, scientists say. Photo courtesy USDA.
China study shows benefits of switching to sustainable, organic agriculture
FRISCO — A large-scale shift to sustainable organic farming could dramatically cut greenhouse gas emissions — and improve soil quality and crop resistance to pests at the same time, according to a new study from China.
Since about a third of all global greenhouse gas emissions are produced by agriculture, scientists have been taking a close look at how to manage the production of food in a way that reduces the global warming footprint. With best practices in place, agriculture could become a net carbon sink instead of a source of heat-trapping pollution, some scientists assert. Continue reading
Filed under: agriculture, climate change, Environment, global warming | Tagged: agriculture, climate change, global warming, greenhouse gases, Organic farming | 3 Comments »