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Does convectively‐detrained cloud ice enhance water vapor feedback?
Author(s) -
John V. O.,
Soden B. J.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl027260
Subject(s) - troposphere , water vapor , environmental science , atmospheric sciences , climatology , sea surface temperature , liquid water path , climate model , positive feedback , ice water , meteorology , climate change , geology , oceanography , aerosol , physics , engineering , electrical engineering , geotechnical engineering
We demonstrate that coupled Global Climate Models (GCMs) can reproduce observed correlations among ice water path (IWP), upper tropospheric water vapor (UTWV), and sea surface temperature (SST), and that the presence/strength of this correlation has no direct bearing on the strength of water vapor feedback in the model. The models can accurately reproduce a strong positive correlation between IWP and UTWV, a rapid increase of IWP with increasing SST and a 2–3 times increase in the slope of UTWV versus SST for SSTs warmer than ∼300 K. We argue that the relative concentrations of IWP to UTWV in both observations and models is too small to significantly influence the observed moistening of the upper troposphere (UT).