DOI: 10.1002/2015JD024499
论文题名: Validation of MODIS liquid water path for oceanic nonraining warm clouds: Implications on the vertical profile of cloud water content
作者: Zhou L. ; Liu Q. ; Liu D. ; Xie L. ; Qi L. ; Liu X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 9 起始页码: 4855
结束页码: 4876
语种: 英语
英文关键词: AMSR-E
; cloud water content profile
; liquid water path
; MODIS
Scopus关键词: air temperature
; AMSR-E
; atmospheric modeling
; cloud
; cloud water
; data processing
; drizzle
; entrainment
; MODIS
; optical depth
; vertical profile
; water content
英文摘要: Liquid water path (LWP) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) is validated using the Advanced Microwave Scanning Radiometer-EOS (AMSR-E) retrievals for global oceanic nonraining warm clouds, with focus on the vertically homogeneous (VH) model and adiabatically stratified (AS) model of liquid water content (LWC) profile used in MODIS retrieval. With respect to AMSR-E LWP that acts as ground truth under a series of constraints, the global average of MODIS-LWPVH and MODIS-LWPAS has a positive (11.8%) and negative (-6.8%) bias, respectively. Most of the oceanic warm clouds tend to have adiabatic origin and correspondingly form AS-like profiles, which could be well retained if drizzle is absent. Besides, the presence of drizzle, cloud top entrainment seems to be another cause that modifies the original LWC profiles to become VH-like, which is notable for the very low clouds that have rather small thickness. These factors jointly determine the appearance of LWP profiles and in turn their spatial pattern across global oceans, with AS-like profiles dominant in the areas where nonraining warm clouds occur very frequently in the form of stratocumulus. The modified MODIS LWP shows significant improvement compared with either MODIS-LWPVH or MODIS-LWPAS. This is achieved by using the two physically explicit models flexibly, in which the elementary MODIS retrievals of cloud top temperature, cloud optical thickness, and droplet effective radius play a determinant role. A combined use of VH and AS model in the MODIS retrieval is demonstrated to be effective for improving the LWP estimation for oceanic nonraining warm clouds. © 2016. American Geophysical Union. All Rights Reserved. 资助项目: 41175032
; 41575019
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62862
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: School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China
Recommended Citation:
Zhou L.,Liu Q.,Liu D.,et al. Validation of MODIS liquid water path for oceanic nonraining warm clouds: Implications on the vertical profile of cloud water content[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)