Abrupt cloud clearing of marine stratocumulus in the subtropical southeast Atlantic
Abrupt cloud clearing of marine stratocumulus in the subtropical southeast Atlantic
复制标题
副热带东南大西洋海洋层积云的突然消云
DOI:
10.1126/science.aar5836
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发表时间:
2018
期刊:
影响因子:
56.9
通讯作者:
Mechem, David B.
中科院分区:
文献类型:
--
作者:
Yuter, Sandra E.;Hader, John D.;Miller, Matthew A.;Mechem, David B.
We document rapid and abrupt clearings of large portions of the subtropical marine low cloud deck that have implications for the global radiation balance and climate sensitivity. Over the southeast Atlantic, large areas of stratocumulus are quickly eroded, yielding partial or complete clearing along sharp transitions hundreds to thousands of kilometers in length that move westward at 8 to 12 meters per second and travel as far as 1000+ kilometers from the African coast. The westward-moving cloudiness reductions have an annual peak in occurrence in the period from April through June. The cloud erosion boundaries reduce cloud at ≈10-kilometer scale in less than 15 minutes, move approximately perpendicular to the mean flow, and are often accompanied by small-scale wave features. Observations suggest that the cloud erosion is caused by atmospheric gravity waves.
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影响因子:
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DOI:
--
发表时间:
2016
期刊:
影响因子:
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作者:
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2013
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2003
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DOI:
--
发表时间:
1981
期刊:
影响因子:
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