Impacts of uncertain cloud-related parameters on Pacific Walker circulation simulation in GAMIL2
作者： Feng XIE , Li-Juan LI , Bin WANG , Wei XUE
DOI: 10.1080/16742834.2018.1392228
关键词: Diabatic 、 Deep convection 、 Convective heating 、 Atmospheric model 、 Environmental science 、 Walker circulation 、 Vertical motion 、 Climatology
摘要: AbstractTo investigate the impacts of uncertain parameters on simulated Pacific Walker circulation (PWC), a large number perturbed parameter simulations are conducted using GAMIL2 (the Grid-point Atmospheric Model IAP/LASG, version 2), and three different PWC indices selected. The results show that influences some dependent selected index – finding supported by inconsistent responses indexes to these parameters. Among nine parameters, RH threshold for deep convection (RHCRIT) is most sensitive in simulating PWC. Increased RHCRIT weakens convective heating stratiform cooling, strengthens shallow heating. Further analysis reveals affect through changing diabatic vertical motion.
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