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contributor authorZhou, Xin;Khairoutdinov, Marat F.
date accessioned2018-01-03T11:01:44Z
date available2018-01-03T11:01:44Z
date copyright9/6/2017 12:00:00 AM
date issued2017
identifier otherjcli-d-17-0214.1.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4246253
description abstractAbstractSubdaily temperature and precipitation extremes in response to warmer SSTs are investigated on a global scale using the superparameterized (SP) Community Atmosphere Model (CAM), in which a cloud-resolving model is embedded in each CAM grid column to simulate convection explicitly. Two 10-yr simulations have been performed using present climatological sea surface temperature (SST) and perturbed SST climatology derived from the representative concentration pathway 8.5 (RCP8.5) scenario. Compared with the conventional CAM, SP-CAM simulates colder temperatures and more realistic intensity distribution of precipitation, especially for heavy precipitation. The temperature and precipitation extremes have been defined by the 99th percentile of the 3-hourly data. For temperature, the changes in the warm and cold extremes are generally consistent between CAM and SP-CAM, with larger changes in warm extremes at low latitudes and larger changes in cold extremes at mid-to-high latitudes. For precipitation, CAM predicts a uniform increase of frequency of precipitation extremes regardless of the rain rate, while SP-CAM predicts a monotonic increase of frequency with increasing rain rate and larger change of intensity for heavier precipitation. The changes in 3-hourly and daily temperature extremes are found to be similar; however, the 3-hourly precipitation extremes have a significantly larger change than daily extremes. The Clausius?Clapeyron scaling is found to be a relatively good predictor of zonally averaged changes in precipitation extremes over midlatitudes but not as good over the tropics and subtropics. The changes in precipitable water and large-scale vertical velocity are equally important to explain the changes in precipitation extremes.
publisherAmerican Meteorological Society
typeJournal Paper
journal volume30
journal issue24
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-17-0214.1
journal fristpage9827
journal lastpage9845
treeJournal of Climate:;2017:;volume( 030 ):;issue: 024
contenttypeFulltext


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