Does convectively-detrained cloud ice enhance water vapor feedback?

V. O. John, B. J. Soden

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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).

Original languageEnglish (US)
Article numberL20701
JournalGeophysical Research Letters
Issue number20
StatePublished - Oct 28 2006

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)


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