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Climate change: fast out of the gate, slow to the finish

By Guest PostOctober 4, 2013Environmentatmospheric co2 concentration, climate change, climate model, climate scientist, global warming, greenhouse gas concentration, intellectual ventures llc, ken caldeira, least sensitive model, marina shemesh, maximum warming, nathan myhrvold, technology corporation

Washington, D.C.— A great deal of research has focused on the amount of global warming resulting from increased greenhouse gas concentrations. But there has been relatively little study of the pace of the change following these increases. A new study by Carnegie’s Ken Caldeira and Nathan Myhrvold of Intellectual Ventures concludes that about half of the warming occurs within the first 10 years after an instantaneous step increase in atmospheric CO2 concentration, but about one-quarter of the warming occurs more than a century after the step increase. Their work is published in Environmental Research Letters.

The study was the result of an unusual collaboration of a climate scientist, Ken Caldeira, who contributed to the recently published Intergovernmental Panel on Climate Change report, and Nathan Myhrvold, the founder and CEO of a technology corporation, Intellectual Ventures LLC. It is the third paper on which they have collaborated. (more…)

UCLA life scientists present new insights on climate change and species interactions

By Guest PostJune 11, 2013Environmentanthony dell, biotraits database, climate change, cold blooded animals, consumer, coral reefs, ecology, ecosystems, feeding event, feeding relationship, flowering in plants, fluctuation, Germany, global increase, global warming, immobile prey, interactions, juvenile possum, knowledge, life scientists, massive dataset, mean temperature, metabolic rate, mobile prey, moving prey, natural ecosystems, policymakers, predator, prey, python, rainforests, rate, resource, rising temperatures, samraat pawar, species, species interactions, timing, ucla, university of chicago, university of gottingen, van savage, variability in temperature

UCLA life scientists provide important new details on how climate change will affect interactions between species in research published online May 21 in the Journal of Animal Ecology. This knowledge, they say, is critical to making accurate predictions and informing policymakers of how species are likely to be impacted by rising temperatures.

“There is a growing recognition among biologists that climate change is affecting how species interact with one another, and that this is going to have very important consequences for the stability and functioning of ecosystems,” said the senior author of the research, Van Savage, an assistant professor of ecology and evolutionary biology and of biomathematics at UCLA. “However, there is still a very limited understanding of exactly what these changes will be. Our paper makes progress on this very important question.” (more…)

Century-Old Science Helps Confirm Global Warming

By Guest PostMay 25, 2013Environmentanthropogenic, argo array, australia, century old science, challengers voyage, global scientific survey, global warming, greenhouse gases, hms challenger, human activities, josh willis, life beneath, NASA, natural variation, ocean data, ocean profiling floats, ocean surface, oceanographic expedition, sandy bay, sea water, sea-level rise, temperature, thermal expansion, university analysis, university of tasmania, will hobbs

A new NASA and university analysis of ocean data collected more than 135 years ago by the crew of the HMS Challenger oceanographic expedition provides further confirmation that human activities have warmed our planet over the past century.

Researchers from the University of Tasmania, Sandy Bay, Australia; and NASA’s Jet Propulsion Laboratory, Pasadena, Calif., combined the ship’s measurements of ocean temperatures with modern observations from the international Argo array of ocean profiling floats. They used both as inputs to state-of-the-art climate models, to get a picture of how the world’s oceans have changed since the Challenger’s voyage. (more…)

The politics of climate change

By Guest PostMay 18, 2013Environment, Politicsaaron m. mccright, american university, chenyang xiao, climate change, curb emissions, democrat, denial machine, global warming, government action, government regulations, influence, lyman briggs college, michigan state university, oklahoma state university, political orientation, Politics, reduce emissions, republican, riley dunlap, scientific consensus, scientific reality, sociologist

U.S. residents who believe in the scientific consensus on global warming are more likely to support government action to curb emissions, regardless of whether they are Republican or Democrat, according to a study led by a Michigan State University sociologist.

However, a political divide remains on the existence of climate change despite the fact that the vast majority of scientists believe it is real, said Aaron M. McCright, associate professor in Lyman Briggs College and the Department of Sociology. (more…)

Recent Antarctic climate, glacier changes at the ‘upper bound’ of normal

By Guest PostMay 15, 2013Environmentantarctic glaciers, antarctic peninsula, antarctic warming, Antarctica, climate change, dark layer, eric steig, glaciers, global warming, human caused warming, ice core, ice sheet divide, icy continent, isotope oxygen 18, oxygen 16, qinghua ding, rapid ice loss, sea-level rise, south america, temperature, tropical pacific ocean, university of washington, upper bound, volcanic ash, west antarctic

In the last few decades, glaciers at the edge of the icy continent of Antarctica have been thinning, and research has shown the rate of thinning has accelerated and contributed significantly to sea level rise.

New ice core research suggests that, while the changes are dramatic, they cannot be attributed with confidence to human-caused global warming, said Eric Steig, a University of Washington professor of Earth and space sciences. (more…)

Global Warming will Open Unexpected New Shipping Routes in Arctic, UCLA Researchers Find

By Guest PostMarch 11, 2013EnvironmentArctic, arctic lakes, arctic ocean, asia, atlantic ocean, coast of russia, eastern canada, global temperature, global warming, icebreakers, independent climate forecasts, Japan, laurence c smith, new shipping routes, north pole, northern sea route, pacific, panama canal, polar class 6, projected shipping lanes, rotterdam, scott r stephenson, sea ice, shipping potential, suez, the netherlands, trans arctic, ucla researchers, vessels, yokohama

Shipping lanes through the Arctic Ocean won’t put the Suez and Panama canals out of business anytime soon, but global warming will make these frigid routes much more accessible than ever imagined by melting an unprecedented amount of sea ice during the late summer, new UCLA research shows.

“The development is both exciting from an economic development point of view and worrisome in terms of safety, both for the Arctic environment and for the ships themselves,” said lead researcher Laurence C. Smith, a professor of geography at UCLA. (more…)

Two-thirds of Americans Now Believe Global Warming is Real

By Guest PostMarch 10, 2013Environmentallentown, americans, barry rabe, belief, evidence, global temperatures, global warming, hurricanes, muhlenberg college, muhlenberg institute, planet, political factors, public opinion, religious, self identified republicans, superstorm sandy, university of michigan

ANN ARBOR — An increasing number of Americans indicate that there is evidence of global warming, with 67 percent now expressing a belief that the planet has warmed over the past four decades, according to a University of Michigan survey.

It marks the highest level of belief in global warming since a 72 percent-measure in 2008 and is up from 52 percent in spring 2010.

The results come from the National Surveys on Energy and Environment, a joint effort of the Center for Local, State, and Urban Policy at U-M’s Ford School of Public Policy and the Muhlenberg Institute of Public Opinion at Muhlenberg College in Allentown, Pa. (more…)

Changes in Cloud Distribution Explain Some Weather Patterns

By Guest PostMarch 4, 2013Environmentability to reflect, atmospheric sciences, black carbon, change in clouds, changes in cloud, climate change, cloud cover, cloud features, cloud properties, cumuliform clouds, distribution, global warming, heavy pollution, homogeneous, horizontal clouds, impact on temperature, jet stream, light, mid latitude, monsoons in india, northern india, rainfall, regional cloud changes, russia, ryan eastman, scientist, stephen warren, storm track, study clouds, thickness, tropics, university of washington, volume of data, weather patterns, weather stations

Regional cloud changes, such as those that result in less rain during monsoons in India and those that indicate a widening of the tropics, may be as important to watch as the overall amount of cloud cover, new University of Washington research indicates.

Authors of the paper, led by Ryan Eastman, a UW research scientist in atmospheric sciences, set out to examine observations collected from weather stations around the world as a way to study the distribution of clouds. The research was recently published in the American Meteorological Society’s Journal of Climate. (more…)

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