DOI: 10.1175/JCLI-D-14-00368.1
Scopus记录号: 2-s2.0-84920277796
论文题名: Mean structure and diurnal cycle of southeast Atlantic boundary layer clouds: Insights from satellite observations and multiscale modeling framework simulations
作者: Painemal D. ; Xu K.-M. ; Cheng A. ; Minnis P. ; Palikonda R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 1 起始页码: 324
结束页码: 341
语种: 英语
Scopus关键词: Climatology
; Clouds
; Image reconstruction
; Radiometers
; Satellite imagery
; Satellites
; Cloud cover
; Cloud retrieval
; Clouds and the Earth's radiant energy systems
; Diurnal effects
; Moderate resolution imaging spectroradiometer
; Satellite observations
; Temperature inversions
; University of Wisconsin
; Boundary layers
; algorithm
; boundary layer
; climatology
; cloud cover
; computer simulation
; diurnal variation
; Meteosat
; MODIS
; satellite data
; stratocumulus
英文摘要: The mean structure and diurnal cycle of southeast (SE) Atlantic boundary layer clouds are described with satellite observations andmultiscalemodeling framework (MMF) simulations during austral spring (September- November). Hourly resolution cloud fraction (CF) and cloud-top height (HT) are retrieved from Meteosat-9 radiances using modified Clouds and the Earth's Radiant Energy System (CERES) Moderate Resolution Imaging Spectroradiometer (MODIS) algorithms, whereas liquid water path (LWP) is from the University of Wisconsin microwave satellite climatology. The MMF simulations use a 2D cloud-resolving model (CRM) that contains an advanced third-order turbulence closure to explicitly simulate cloud physical processes in every grid column of a general circulationmodel. The model accurately reproduces themarine stratocumulus spatial extent and cloud cover. The mean cloud cover spatial variability in the model is primarily explained by the boundary layer decoupling strength, whereas a boundary layer shoaling accounts for a coastal decrease in CF. Moreover, the core of the stratocumulus cloud deck is concomitant with the location of the strongest temperature inversion. Although the model reproduces the observed westward boundary layer deepening and the spatial variability of LWP, it overestimates LWP by 50%.Diurnal cycles ofHT, CF, and LWP from satellites and the model have the same phase, with maxima during the early morning and minima near 1500 local solar time,which suggests that the diurnal cycle is driven primarily by solar heating. Comparisons with the SE Pacific cloud deck indicate that the observed amplitude of the diurnal cycle is modest over the SE Atlantic, with a shallower boundary layer as well. The model qualitatively reproduces these interregime differences. © 2015 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50784
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: NASA Langley Research Center, Hampton, VA, United States; Science Systems and Applications, Inc., Hampton, VA, United States
Recommended Citation:
Painemal D.,Xu K.-M.,Cheng A.,et al. Mean structure and diurnal cycle of southeast Atlantic boundary layer clouds: Insights from satellite observations and multiscale modeling framework simulations[J]. Journal of Climate,2015-01-01,28(1)