Lagged response of tropical tropospheric temperature to solar ultraviolet variations on intraseasonal time scales
AuthorHood, L. L.
AffiliationUniv Arizona, Lunar & Planetary Lab
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationLagged response of tropical tropospheric temperature to solar ultraviolet variations on intraseasonal time scales 2016, 43 (8):4066 Geophysical Research Letters
JournalGeophysical Research Letters
Rights©2016. American Geophysical Union. All Rights Reserved.
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AbstractCorrelative and regression analyses of daily ERA-Interim reanalysis data for three separate solarmaximum periods conﬁrm the existence of a temperature response to short-term (mainly ∼27 day) solarultraviolet variations at tropical latitudes in both the lower stratosphere and troposphere. The response,which occurs at a phase lag of 6–10 days after the solar forcing peak, consists of a warming in the lowerstratosphere, consistent with relative downwelling and a slowing of the mean meridional (Brewer-Dobson)circulation, and a cooling in the troposphere. The midtropospheric cooling response is most signiﬁcant inthe tropical Paciﬁc, especially under positive El Niño–Southern Oscillation conditions and may be relatedto a reduction in the number of Madden-Julian oscillation events that propagate eastward into the centralPaciﬁc following peaks in short-term solar forcing.
Note6 month embargo; Published online 30 APR 2016
VersionFinal published version
SponsorsSupported by grant NNX14AD44G from the NASA Living With a Star program.