Ancient outburst flooding
Nature Geoscience
2012년11월12일

A massive outburst flood from a Canadian glacial lake during the last interglacial period transported sediment across the Labrador Sea in the North Atlantic, reports a paper published online this week in Nature Geoscience. This event seems to be analogous to a similar outburst flood that occurred about 8,400 years ago and caused cooling across the Northern Hemisphere.
Joseph Nicholl and colleagues examined marine sediments from the Labrador Sea, deposited during the last interglacial, between 125,000 and 119,000 years ago. They identified an unusual red layer of sediments derived from the Hudson Bay. These red sediments were most likely deposited during a massive outpouring of water from a continental lake that was filled by the melting North American ice sheet. The flood layer proved difficult to date, but the authors suggest that it may correspond to a period of cooling previously identified in the North Atlantic.
doi: 10.1038/ngeo1622
리서치 하이라이트
-
2월26일
Environment: Shifting from small to medium plastic bottles could reduce PET wasteScientific Reports
-
2월24일
Environment: European forests more vulnerable to multiple threats as climate warmsNature Communications
-
2월11일
Environment: Global CFC-11 emissions in declineNature
-
2월9일
Marine science: Bleaching leaves long-lasting effects on coral physiologyNature Ecology & Evolution
-
2월4일
Environmental science: Fresh water in the ice-age Arctic OceanNature
-
2월3일
Climate science: Under-reporting of greenhouse gas emissions in US citiesNature Communications