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Southern Glaciers Grow Out of Step With North--New Dating Technique Points to Differences Over 7,000 Years（图）
Southern Glaciers New Dating Technique Over 7,000 Years
2009/12/10
The vast majority of the world’s glaciers are retreating as the planet gets warmer. But a few, including ones south of the equator, in South America and New Zealand, are inching forward. A new study i...
Fire Is an Important and Under-Appreciated Part of Global Climate Change（图）
fire climate under-appreciated part
2009/4/30
Fire must be accounted for as an integral part of climate change, according to 22 authors of an article published in the April 24 issue of the journal Science. The authors determined that intentional ...
Periodic Megadroughts Hit West Africa, Says Study--Global Warming Could Worsen Newly Seen Pattern（图）
Periodic Megadroughts West Africa Global Warming
2009/12/10
Researchers have developed the first year-by-year record of rainfall in sub-Saharan West Africa for the past 3,000 years, and identified a daunting pattern: a 30-to-60-year cycle of serious droughts t...
《ISME杂志》：科学家阐释地球化学循环中磷酸盐控制
地球化学循环 磷酸盐控制
2009/4/15
确定磷酸盐如何有效地控制细菌生长对于我们更好地理解地球化学循环至关重要。在《ISME杂志》上发表的一篇文章中，美国科学家证明了PhoX—— 一种广泛分布在海洋细菌生态学原子团中的碱性磷酸盐——能够作为无机磷酸盐（Pi）压力的标志。
Solomon Islands earthquake sheds light on enhanced tsunami risk（图）
Solomon Islands earthquake enhanced tsunami risk
2009/12/21
The 2007 Solomon Island earthquake may point to previously unknown increased earthquake and tsunami risks because of the unusual tectonic plate geography and the sudden change in direction of the eart...
Red jasper cored from layers 3.46 billion years old suggests that not only did the oceans contain abundant oxygen then, but that the atmosphere was as oxygen rich as it is today, according to geologis...
Ecosystems Push South--Warming Climate Drives Plankton and Penguins Poleward（图）
Ecosystems Push South Warming Climate Plankton and Penguins Poleward
2009/12/10
Adélie penguins are flocking closer to the South Pole. A new study in the leading journal Science explains why: they’re following the food supply, which is moving southward with changing climate.Krill...
Wind Shifts May Stir CO2 From Antarctic Depths--Releases May Have Speeded End of Last Ice Age—And Could Act Again（图）
Wind Shifts CO2 Antarctic Depths Last Ice Age
2009/12/10
Natural releases of carbon dioxide from the Southern Ocean due to shifting wind patterns could have amplified global warming at the end of the last ice age--and could be repeated as manmade warming pr...
Geologists Map Rocks to Soak CO2 From Air--6,000 Square Miles in U.S. Might Turn Emissions to Harmless Solids（图）
Geologists Map 6,000 Square Miles in U.S. Emissions Harmless Solids
2009/12/10
To slow global warming, scientists are exploring ways to pull carbon dioxide from the air and safely lock it away. Trees already do this naturally through photosynthesis; now, in a new report, geologi...
Scientists to Map Out Earth's Soil--New tool will help explain and solve world’s greatest environmental threats（图）
Earth's Soil world’s greatest environmental threats
2009/12/10
New York, February 17, 2009 — Some of the answers to the world’s greatest challenges -- such as climate change, food security, and water scarcity -- lie right beneath our feet. Responding to these and...
Nearly All of Antarctica Is Warming--New Study Shows Steady 50-Year Rise（图）
Antarctica Is Warming Steady 50-Year Rise
2009/12/10
Antarctica is getting warmer, a new study shows. Though scientists already knew fast-collapsing ice shelves on the continent’s northerly peninsula were the result of rapid warming, evidence on the far...
African initiative trains students, explores geophysical mysteries（图）
African initiative students geophysical mysteries
2009/12/21
Earthquakes, volcanoes and the African superplume are only some of the phenomena under investigation through AfricaArray, a program that establishes geophysical observatories, trains African and Ameri...
Volcanoes Cool the Tropics, Say Researchers--But Global Warming May Have Helped Override Some Recent Eruptions（图）
Volcanoes the Tropics Global Warming Some Recent Eruptions
2009/12/10
Climate researchers have shown that big volcanic eruptions over the past 450 years have temporarily cooled weather in the tropics—but suggest that such effects may have been masked in the 20th century...
英国媒体公布未来可能毁灭人类四大灾难（图）
毁灭人类 四大 灾难
2008/11/25
北京时间2008年11月24日消息，据英国《每日邮报》报道，在地球长达45亿年的历史长河中，经历了许多犹如世界末日的大灾难：火山爆发、流星撞击、大火和寒冰一度几乎彻底毁灭了这个星球上的所有生灵，甚至威胁到地球本身的存在。日前，英国电视4台推出一档《灾难》栏目，探讨大破坏所包含的科学，揭密人类以及地球未来可能面临的灾难。
《科学》：科学家揭示地球磁场逆转机制
地球磁场 逆转机制
2008/10/6
科学家早就知道，地球的主磁场会周期性地逆转方向。这种极性颠倒在地球的历史上间隔不规律地发生过几百次，最近一次大约在78万年前。科学家一直在设法弄清其中的原因和机制。
美国科学家近日通过研究古代火山岩发现，另一个磁场源可能帮助决定了主磁场是否发生逆转及其方式。这一磁场可能起源于岩石地幔层下方的浅核，称作浅核磁场（shallow core field）。当主磁场削弱时，它就变得极为重要。相关论...