期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 11, 页码 5818-5825出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL073559
关键词
cloud; smoke; CATS; CALIPSO; lidar; Atlantic
资金
- NASA New Investigator Program [NNX14AI35G]
- NASA Radiation Sciences Program
- NASA CloudSat
- CALIPSO Science Teamgrant [NNH14CK44C]
- NASA CALIPSO/CloudSat project [NNX14AB21G]
- U.S. National Science Foundation [CNS-0821258, CNS-1228778]
- SCREMS program [DMS-0821311]
- NASA [683300, NNX14AI35G] Funding Source: Federal RePORTER
From June to October, low-level clouds in the southeast (SE) Atlantic often underlie seasonal aerosol layers transported from African continent. Previously, the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) 532nm lidar observations have been used to estimate the relative vertical location of the above-cloud aerosols (ACA) to the underlying clouds. Here we show new observations from NASA's Cloud-Aerosol Transport System (CATS) lidar. Two seasons of CATS 1064nm observations reveal that the bottom of the ACA layer is much lower than previously estimated based on CALIPSO 532nm observations. For about 60% of CATS nighttime ACA scenes, the aerosol layer base is within 360m distance to the top of the underlying cloud. Our results are important for future studies of the microphysical indirect and semidirect effects of ACA in the SE Atlantic region.
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