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Record #123691:

Water vapor feedback and the ice age snowline record / De-zheng Sun, Richard S. Lindzen.

Title: Water vapor feedback and the ice age snowline record / De-zheng Sun, Richard S. Lindzen.
Author(s): Sun, De-zheng.
Lindzen, Richard S.
Date: 1993.
In: Annales Geophysicae. (1993.), Vol. 11(2-3) (1993)
Abstract: Uses radiative-convective model to investigate changes of water vapour above convective boundary layer that can be consistent with vertical structure of tropical tropospheric temperature indicated by mountain snowline record, i.e. steeper lapse rate in low atmosphere (or equivalent reduction in static stability) requiring concomitant reduction in radiative cooling rate. Profiles observed in CLIMAP have much more convective available potential energy than present profiles, which can lead to enhanced production of hydrometeors in middle and upper troposphere whose re-evaporation can moisturize free troposphere. Show that moisture change leads to strong negative feedback which reduces response to doubling of CO₂. Discusses apparent contradictions between present results and existing studies suggesting positive water-vapour feedback.
Notes:

Annales Geophysicae. Vol. 11(2-3) :204-215 (1993).

Keywords: 551.58 -- Climatology.
551.583.3 -- Climatic changes, Quaternary.
519.673 -- Modelling.
E9 -- Glaciology: meteorology and climatology.
SPRI record no.: 123691

MARCXML

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500 ## ‡aAnnales Geophysicae. Vol. 11(2-3) :204-215 (1993).
520 3# ‡aUses radiative-convective model to investigate changes of water vapour above convective boundary layer that can be consistent with vertical structure of tropical tropospheric temperature indicated by mountain snowline record, i.e. steeper lapse rate in low atmosphere (or equivalent reduction in static stability) requiring concomitant reduction in radiative cooling rate. Profiles observed in CLIMAP have much more convective available potential energy than present profiles, which can lead to enhanced production of hydrometeors in middle and upper troposphere whose re-evaporation can moisturize free troposphere. Show that moisture change leads to strong negative feedback which reduces response to doubling of CO₂. Discusses apparent contradictions between present results and existing studies suggesting positive water-vapour feedback.
650 07 ‡a551.58 -- Climatology.‡2udc
650 07 ‡a551.583.3 -- Climatic changes, Quaternary.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
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