DOI: 10.1002/jgrd.50676
论文题名: Transitions of cloud-topped marine boundary layers characterized by AIRS, MODIS, and a large eddy simulation model
作者: Yue Q. ; Kahn B.H. ; Xiao H. ; Schreier M.M. ; Fetzer E.J. ; Teixeira J. ; Sušelj K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8598
结束页码: 8611
语种: 英语
英文关键词: collocated satellite observation
; Large eddy simulation
; Marine boundary layer cloud
; transition
Scopus关键词: Boundary layers
; Clouds
; Computer simulation
; Evaporative cooling systems
; Infrared devices
; Infrared instruments
; Large eddy simulation
; Radiometers
; Atmospheric infrared sounders
; Cloud-top entrainment instabilities
; Marine boundary layer clouds
; Moderate resolution imaging spectroradiometer
; Satellite observations
; Temporal characteristics
; Theoretical and numerical modeling
; transition
; Satellite imagery
; AIRS
; boundary layer
; cooling
; large eddy simulation
; MODIS
; numerical model
; pixel
; satellite data
; stratocumulus
; Pacific Ocean
英文摘要: Cloud top entrainment instability (CTEI) is a hypothesized positive feedback between entrainment mixing and evaporative cooling near the cloud top. Previous theoretical and numerical modeling studies have shown that the persistence or breakup of marine boundary layer (MBL) clouds may be sensitive to the CTEI parameter. Collocated thermodynamic profile and cloud observations obtained from the Atmospheric Infrared Sounder (AIRS) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments are used to quantify the relationship between the CTEI parameter and the cloud-topped MBL transition from stratocumulus to trade cumulus in the northeastern Pacific Ocean. Results derived from AIRS and MODIS are compared with numerical results from the UCLA large eddy simulation (LES) model for both well-mixed and decoupled MBLs. The satellite and model results both demonstrate a clear correlation between the CTEI parameter and MBL cloud fraction. Despite fundamental differences between LES steady state results and the instantaneous snapshot type of observations from satellites, significant correlations for both the instantaneous pixel-scale observations and the long-term averaged spatial patterns between the CTEI parameter and MBL cloud fraction are found from the satellite observations and are consistent with LES results. This suggests the potential of using AIRS and MODIS to quantify global and temporal characteristics of the cloud-topped MBL transition. Key Points The MBL transition is studied using AIRS/MODIS observations and UCLA LES. MBL cloud fraction is closely correlated with CTEI parameter. This work shows the potential of using AIRS/MODIS to study MBL transition. ©2013. American Geophysical Union. All Rights Reserved. 资助项目: NA07OAR4310236
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63446
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA, United States; Joint Institute for Regional Earth System Science and Engineering, University of California - Los Angeles, Los Angeles, CA, United States; Department of Atmospheric and Ocean Sciences, University of California, Los Angeles CA, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland WA, United States
Recommended Citation:
Yue Q.,Kahn B.H.,Xiao H.,et al. Transitions of cloud-topped marine boundary layers characterized by AIRS, MODIS, and a large eddy simulation model[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)