@article{McCoy:2015:10.1002/2015JD023603,
author = {McCoy, DT and Hartmann, DL and Zelinka, MD and Ceppi, P and Grosvenor, DP},
doi = {10.1002/2015JD023603},
journal = {Journal of Geophysical Research: Atmospheres},
pages = {9539--9554},
title = {Mixed-phase cloud physics and Southern Ocean cloud feedback in climate models},
url = {http://dx.doi.org/10.1002/2015JD023603},
volume = {120},
year = {2015}
}

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TY  - JOUR
AB  - Increasing optical depth poleward of 45° is a robust response to warming in global climate models. Much of this cloud optical depth increase has been hypothesized to be due to transitions from icedominated to liquiddominated mixedphase cloud. In this study, the importance of liquidice partitioning for the optical depth feedback is quantified for 19 Coupled Model Intercomparison Project Phase 5 models. All models show a monotonic partitioning of ice and liquid as a function of temperature, but the temperature at which ice and liquid are equally mixed (the glaciation temperature) varies by as much as 40 K across models. Models that have a higher glaciation temperature are found to have a smaller climatological liquid water path (LWP) and condensed water path and experience a larger increase in LWP as the climate warms. The iceliquid partitioning curve of each model may be used to calculate the response of LWP to warming. It is found that the repartitioning between ice and liquid in a warming climate contributes at least 20% to 80% of the increase in LWP as the climate warms, depending on model. Intermodel differences in the climatological partitioning between ice and liquid are estimated to contribute at least 20% to the intermodel spread in the highlatitude LWP response in the mixedphase region poleward of 45°S. It is hypothesized that a more thorough evaluation and constraint of global climate model mixedphase cloud parameterizations and validation of the total condensate and iceliquid apportionment against observations will yield a substantial reduction in model uncertainty in the highlatitude cloud response to warming.
AU  - McCoy,DT
AU  - Hartmann,DL
AU  - Zelinka,MD
AU  - Ceppi,P
AU  - Grosvenor,DP
DO  - 10.1002/2015JD023603
EP  - 9554
PY  - 2015///
SN  - 2169-897X
SP  - 9539
TI  - Mixed-phase cloud physics and Southern Ocean cloud feedback in climate models
T2  - Journal of Geophysical Research: Atmospheres
UR  - http://dx.doi.org/10.1002/2015JD023603
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000363425900029&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015JD023603
UR  - http://hdl.handle.net/10044/1/76096
VL  - 120
ER  - 

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