Massive southern invasions by northern birds linked to climate shifts
With puzzling variability, vast numbers of birds from Canada's boreal forests migrate hundreds or thousands of miles south from their usual winter range. These so-called irruptions were first noticed by birdwatchers ...
Panama debate fueled by zircon dating: Americas connected earlier than thought
New evidence published in Science by Smithsonian geologists dates the closure of an ancient seaway at 13 to 15 million years ago and challenges accepted theories about the rise of the Isthmus of Panama and it ...
Study shows microbes may accelerate loss of permafrost in Greenland
Direct evidence for a positive feedback in climate change
A new study has confirmed the existence of a positive feedback operating in climate change whereby warming itself may amplify a rise in greenhouse gases resulting in additional warming.
Acceleration in sea level rise far larger than initially thought, study shows
The acceleration in global sea level from the 20th century to the last two decades has been significantly larger than scientists previously thought, according to a new Harvard study.
Report claims consumers are uninformed regarding magnitude of livestock contribution to carbon emissions
Temperature a dominant influence on bird diversity loss in Mexico
A wide-ranging study of gains and losses of populations of bird species across Mexico in the 20th century shows shifts in temperature due to global climate change are the primary environmental influence on ...
Analyzing ocean mixing reveals insight on climate
Scientists at Los Alamos National Laboratory have developed a computer model that clarifies the complex processes driving ocean mixing in the vast eddies that swirl across hundreds of miles of open ocean.
Scientists make new estimates of the deep carbon cycle
Over billions of years, the total carbon content of the outer part of the Earth—in its upper mantle, crust, oceans, and atmospheres—has gradually increased, scientists reported this month in the journal Proceedings of ...
Alaska glaciers make large contributions to global sea level rise
Alaska's melting glaciers are adding enough water to the Earth's oceans to cover the state of Alaska with a 1-foot thick layer of water every seven years, a new study shows.
Plants may run out of time to grow under ongoing climate change
The causes and consequences of global warming are still under debate, but what would actually happen to all the plants, essential to many aspects of our lives, if the climate in the planet does get warmer? ...
Using new data, US finds no pause in global warming
Using updated data on the Earth's surface temperatures worldwide, US government scientists have found no evidence of a pause in global warming in recent years, according to research published on Thursday.
Paleo study shows how elevation may affect evolution
About 34 million years ago, global temperatures took a dive, causing a sudden wave of extinctions among European mammals. In North America, however, life went on largely unscathed. A new study explains why: ...
Greenhouse gas-caused warming felt in just months
The heat generated by burning a fossil fuel is surpassed within a few months by the warming caused by the release of its carbon dioxide into the atmosphere, according to new work from Carnegie's Xiaochun ...