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|a Changes in the sea surface temperature threshold for tropical convection |h [electronic resource]. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2010-12. |
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|a Nature Geoscience Volume 3. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Deep convection over tropical oceans is observed generally
above a threshold for sea surface temperatures1–4, which falls
in the vicinity of 26–28 [degrees]C. High-resolution models suggest
that the related sea surface temperature threshold for tropical
cyclones rises in a warming climate5,6. Some observations for
the past few decades, however, show that tropical tropospheric
warming has been nearly uniform vertically7,8, suggesting that
the troposphere may have become less stable and casting
doubts on the possibility that the sea surface temperature
threshold increases substantially with global warming. Here
we turn to satellite observations of rainfall for the past 30
years. We detect significant covariability between tropical
mean sea surface temperatures and the convective threshold
on interannual and longer timescales. In addition, we find
a parallel upward trend of approximately 0:1 [degrees]C.=decade
over the past 30 years in both the convective threshold
and tropical mean sea surface temperatures. We conclude
that, in contrast with some observational indications, the
tropical troposphere has warmed in a way that is consistent
with moist-adiabatic adjustment, in agreement with global
climate model simulations. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15052561/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/05/25/61/00001/FI15052561_thm.jpg |
