DOI: 10.1175/JCLI-D-14-00294.1
Scopus记录号: 2-s2.0-84961292171
论文题名: Regional simulation of the october and november MJO events observed during the CINDY/DYNAMO field campaign at gray zone resolution
作者: Wang S. ; Sobel A.H. ; Zhang F. ; Qiang Sun Y. ; Yue Y. ; Zhou L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 6 起始页码: 2097
结束页码: 2119
语种: 英语
Scopus关键词: Budget control
; Humidity control
; Oceanography
; Storms
; Surface measurement
; Troposphere
; Deep convection
; Horizontal grid spacing
; Indian ocean experiments
; Intraseasonal variability
; Madden-Julian oscillation
; Outgoing longwave radiation
; Surface precipitation
; Tropical variability
; Climatology
; atmospheric convection
; atmospheric modeling
; Madden-Julian oscillation
; precipitation (climatology)
; regional climate
; sea surface temperature
; seasonal variation
; vertical movement
; vorticity
英文摘要: This study investigates the October and November MJO events observed during the Cooperative Indian Ocean Experiment on Intraseasonal Variability in the Year 2011 (CINDY)/Dynamics of the MJO (DYNAMO) field campaign through cloud-permitting numerical simulations. The simulations are compared to multiple observational datasets. The control simulation at 9-km horizontal grid spacing captures the slow eastward progression of both the October and November MJO events in surface precipitation, outgoing longwave radiation, zonal wind, humidity, and large-scale vertical motion. The vertical motion shows weak ascent in the leading edge of the MJO envelope, followed by deep ascent during the peak precipitation stage and trailed by a broad second baroclinic mode structure with ascent in the upper troposphere and descent in the lower troposphere. Both the simulation and the observations also show slow northward propagation components and tropical cyclone-like vortices after the passage of the MJO active phase. Comparison with synthesized observations from the northern sounding array shows that the model simulates the passage of the two MJO events over the sounding array region well. Sensitivity experiments to SST indicate that daily SST plays an important role for the November MJO event, but much less so for the October event. Analysis of the moist static energy (MSE) budget shows that both advection and diabatic processes (i.e., surface fluxes and radiation) contribute to the development of the positive MSE anomaly in the active phase, but their contributions differ by how much they lead the precipitation peak. In comparison to the observational datasets used here, the model simulation may have a stronger surface flux feedback and a weaker radiative feedback. The normalized gross moist stability in the simulations shows an increase from near-zero values to ~0.8 during the active phase, similar to what is found in the observational datasets. © 2015 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50507
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Department of Meteorology, The Pennsylvania State University, University Park, PA, United States; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou, China
Recommended Citation:
Wang S.,Sobel A.H.,Zhang F.,et al. Regional simulation of the october and november MJO events observed during the CINDY/DYNAMO field campaign at gray zone resolution[J]. Journal of Climate,2015-01-01,28(6)