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Footprint of Tropical Mesoscale Convective System Variability on Stratospheric Water Vapor
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2020
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Source: Geophysical Research Letters, 47(5)
[PDF-5.27 MB]
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Journal Title:Geophysical Research Letters
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Description:Mesoscale convective systems (MCSs) play a dominant role in tropical climate. However, the variabilities of their occurrences on a tropical ‐wide scale remain elusive, and the way they impact the tropical stratospheric moisture remains under debate. Based on a comprehensive global MCS data setduring 1985 –2008, we detect distinct transitions in tropical MCS activities, with the occurrence frequency of MCS during 1995 –2002 being signi ficantly lower than those before and after this period by over 10%. The stepwise transition of tropical MCSs has a signi ficant impact on stratospheric water vapor: Active MCS occurrences result in an overall drier stratosphere, and vice versa. We demonstrate that these changes are closely related to the sea surface temperature pattern in the tropical central Paci fic and the
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Source:Geophysical Research Letters, 47(5)
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DOI:
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ISSN:0094-8276;1944-8007;
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Rights Information:Other
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