Skip to main content

Departure from Clausius-Clapeyron scaling of water entering the stratosphere in response to changes in tropical upwelling

Author(s): Fueglistaler, Stephan; Liu, Yu S; Flannaghan, Thomas J; Ploeger, Felix; Haynes, Peter H

Download
To refer to this page use: http://arks.princeton.edu/ark:/88435/pr10z70w4v
Full metadata record
DC FieldValueLanguage
dc.contributor.authorFueglistaler, Stephan-
dc.contributor.authorLiu, Yu S-
dc.contributor.authorFlannaghan, Thomas J-
dc.contributor.authorPloeger, Felix-
dc.contributor.authorHaynes, Peter H-
dc.date.accessioned2022-01-25T14:58:21Z-
dc.date.available2022-01-25T14:58:21Z-
dc.date.issued2014-02-04en_US
dc.identifier.citationFueglistaler, Stephen , Yu S. Liu, Thomas J. Flannaghan, Felix Ploeger, and Peter H. Haynes. "Departure from Clausius‐Clapeyron scaling of water entering the stratosphere in response to changes in tropical upwelling." Journal of Geophysical Research: Atmospheres 119, no. 4 (2014): 1962-1972. doi:10.1002/2013JD020772.en_US
dc.identifier.issn2169-897X-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr10z70w4v-
dc.description.abstractWater entering the stratosphere ([H2O]entry) is strongly constrained by temperatures in the tropical tropopause layer (TTL). Temperatures at tropical tropopause levels are 15–20 K below radiative equilibrium. A strengthening of the residual circulation as suggested by general circulation models in response to increasing greenhouse gases is, based on radiative transfer calculations, estimated to lead to a temperature decrease of about 2 K per 10% change in upwelling (with some sensitivity to vertical scale length). For a uniform temperature change in the inner tropics, [H2O]entry may be expected to change as predicted by the temperature dependence of the vapor pressure, referred here as “Clausius‐Clapeyron (CC) scaling.” Under CC scaling, this corresponds to ∼1 ppmv change in [H2O]entry per 10% change in upwelling. However, the change in upwelling also changes the residence time of air in the TTL. We show with trajectory calculations that this affects [H2O]entry, such that [H2O]entry changes ∼10 % less than expected from CC scaling. This residence time effect for water vapor is a consequence of the spatiotemporal variance in the temperature field. We show that for the present‐day TTL, a little more than half of the effect is due to the systematic relation between flow and temperature field. The remainder can be understood from the perspective of a random walk problem, with slower ascent (longer path) increasing each air parcel's probability to encounter anomalously low temperatures. Our results show that atmospheric water vapor may depart from CC scaling with mean temperatures even when all physical processes of dehydration remain unchanged.en_US
dc.format.extent1962 - 1972en_US
dc.language.isoen_USen_US
dc.relation.ispartofJournal of Geophysical Research: Atmospheresen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleDeparture from Clausius-Clapeyron scaling of water entering the stratosphere in response to changes in tropical upwellingen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1002/2013JD020772-
dc.date.eissued2014-02-25en_US
dc.identifier.eissn2169-8996-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

Files in This Item:
File Description SizeFormat 
Departure_clausius-clapeyron_scaling_water_stratosphere_tropical_upwelling.pdf317.57 kBAdobe PDFView/Download


Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.