DOI: 10.1175/JCLI-D-15-0712.1
Scopus记录号: 2-s2.0-84991221632
论文题名: Responses of tropical ocean clouds and precipitation to the large-scale circulation: Atmospheric-water-budget-related phase space and dynamical regimes
作者: Wong S. ; Del Genio A.D. ; Wang T. ; Kahn B.H. ; Fetzer E.J. ; L'Ecuyer T.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 19 起始页码: 7127
结束页码: 7143
语种: 英语
Scopus关键词: Advection
; Budget control
; Climatology
; Clouds
; Dynamics
; Image reconstruction
; Meteorology
; Moisture
; Phase space methods
; Radiometers
; Rain
; Satellite imagery
; Tropics
; Atmospheric circulation
; General circulation model
; Global precipitation climatology projects
; Large-scale circulation
; Model evaluation/performance
; Moderate resolution imaging spectroradiometer
; Stratiform precipitation
; Water budget
; Precipitation (meteorology)
英文摘要: An atmospheric-water-budget-related phase space is constructed with the tendency terms related to dynamical convergence (QCON = -Q∇ · V) and moisture advection (QADV = -V · ∇Q) in the water budget equation. Over the tropical oceans, QCON accounts for large-scale dynamical conditions related to conditional instability, and QADV accounts for conditions related to lower-tropospheric moisture gradient. Two reanalysis products [MERRA and ERA-Interim (ERAi)] are used to calculate QCON and QADV. Using the phase space as a reference frame, the Moderate Resolution Imaging Spectroradiometer (MODIS) cloud-top pressure (CTP) and cloud optical depth (COD) are used to evaluate simulated clouds in the GISS-E2 general circulation model. In regimes of divergence over the tropical oceans, moist advection yields frequent high- to midlevel medium-thickness to thick clouds associated with moderate stratiform precipitation, while dry advection yields low-level thin clouds associated with shallow convection with lowered cloud tops. In regimes with convergence, moist and dry advection modulate the relative abundance of high-level thick clouds and low-level thin to medium-thickness clouds. GISS-E2 qualitatively reproduces the cloud property dependence on moisture budget tendencies in regimes of convergence but with larger COD compared to MODIS. Low-level thick clouds in GISS-E2 are the most frequent in regimes of near-zero convergence and moist advection instead of those of large-scale divergence. Compared to the Global Precipitation Climatology Project product, MERRA, ERAi, and GISS-E2 have more rain in regimes with deep convection and less rain in regimes with shallow convection. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50325
Appears in Collections: 气候变化事实与影响
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Department of Atmospheric and Ocean Sciences, University of Wisconsin-Madison, Madison, WI, United States
Recommended Citation:
Wong S.,Del Genio A.D.,Wang T.,et al. Responses of tropical ocean clouds and precipitation to the large-scale circulation: Atmospheric-water-budget-related phase space and dynamical regimes[J]. Journal of Climate,2016-01-01,29(19)