Considering the radiative effects of snow on tropical Pacific Ocean radiative heating profiles in contemporary GCMs using A-Train observations

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題名:	Considering the radiative effects of snow on tropical Pacific Ocean radiative heating profiles in contemporary GCMs using A-Train observations
作者:	余嘉裕;Li, J.‐L. F.;Lee, Wei‐Liang;Waliser, Duane;Wang, Yi‐Hui;Yu, Jia‐Yuh;Jiang, Xianan;L'Ecuyer, Tristan;Chen, Yi‐Chun;Kubar, Terry;Fetzer, Eric;Mahakur, M.
貢獻者:	地球科學學院大氣科學學系
關鍵詞:	Atmosphere;Atmospheric Infrared Sounder;Atmospheric models;Atmospheric precipitations;Atmospheric research;Atmospherics;Brackish;Climate;Climate models;cloud radiation;Clouds;Communities;Computer simulation;Convection;Convergence;Cooling;Dynamics;Earth;Earth atmosphere;Energy;Evaluation;Falling;Fluxes;GCM;Geophysics;Global climate;Heating;heating rate;Hydrologic cycle;Interactions;Intertropical convergence zone;Lidar;Marine;Meteorological satellites;Movement;Ocean models;Precipitation;Products;Properties;Radiation;Radiative heating;Sensitivity;Simulation;Snow;Temperature;Trade;Trade winds;Tropical convection;Troposphere;Upper troposphere;Vapor clouds;Water outflow;Water vapor;Water vapour;Winds
日期:	2016-02-27
上傳時間:	2026-04-21 14:11:43 (UTC+8)
出版者:	Wiley-Blackwell;Washington: American Geophysical Union (AGU)
摘要:	摘要： AbstractThis study characterizes biases in water vapor, dynamics, shortwave (SW) and longwave (LW) radiative properties in contemporary global climate models (GCMs) against observations over tropical Pacific Ocean. The observations are based on Atmospheric Infrared Sounder for water vapor, CloudSat 2B‐FLXHR‐LIDAR for LW and SW radiative heating profiles, and radiative flux from Clouds and the Earth's Radiant Energy System products. The model radiative heating profiles are adopted from the coupled and uncoupled National Center for Atmospheric Research (NCAR) Community Earth System Model version 1 (CESM1) and joint Year of Tropical Convection (YOTC)/Madden Julian Oscillation (MJO) Task Force‐Global Energy and Water Cycle Experiment Atmospheric System Studies (GASS) Multi‐Model Physical Processes Experiment (YOTC‐GASS). The results from the model evaluation for YOTC‐GASS and NCAR CESM1 demonstrate a number of systematic radiative biases. These biases include excessive outgoing LW radiation and excessive SW surface radiative fluxes, in conjunction with a radiatively unstable atmosphere with excessive LW cooling in the upper troposphere over convectively active areas, such as the Intertropical Convergence Zone/South Pacific Convergence Zone (ITCZ/SPCZ) and warm pool. Using sensitivity experiments with the NCAR‐uncoupled/NCAR‐coupled CESM1, we infer that these biases partly result from the interactions between falling snow and radiation that are missing in most contemporary GCMs (e.g., YOTC‐GASS, Coupled Model Intercomparison Project 3 (CMIP)3, and Atmospheric Model Intercomparison Project 5 (AMIP5)/CMIP5). A number of biases in the YOTC‐GASS model simulations are consistent with model biases in CMIP3, AMIP5/CMIP5, and NCAR‐uncoupled/NCAR‐coupled model simulation without snow‐radiation interactions. These include excessive upper level convection and low level downward motion with outflow from ITCZ/SPCZ. This generates weaker low‐level trade winds and excessive precipitation in the Central Pacific Trade wind regions. The excessive LW radiative cooling in NCAR‐coupled/NCAR‐uncoupled GCM simulations is reduced by 10–20% with snow‐radiative effects considered. 出版者： Washington: American Geophysical Union (AGU) 出版日期： 2016-02-27 出處： Journal of Geophysical Research: Atmospheres, 2016-02, Vol.121 (4), p.1621-1636 資源來源： Wiley Online Library - AutoHoldings Journals 版權： 2016. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-897X 識別號： ISSN: 2169-8996 識別號： EISSN: 2169-8996 識別號： DOI: 10.1002/2015jd023587
顯示於類別:	[大氣科學學系] 期刊論文

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