气候变化领域集成服务门户(CCPortal): Comparing Satellite- and Ground-Based Observations of Cloud Occurrence Over High Southern Latitudes

CCPortal

DOI	10.1029/2020JD033607
	Comparing Satellite- and Ground-Based Observations of Cloud Occurrence Over High Southern Latitudes
	McErlich C.; McDonald A.; Schuddeboom A.; Silber I.
发表日期	2021
ISSN	2169897X
卷号	126 期号:6
英文摘要	The 2B-CLDCLASS-LIDAR R05 (2BCL5) and the raDAR/liDAR (DARDAR) satellite retrievals of cloud occurrence are compared as a function of altitude and latitude. The largest disparities are observed at low altitudes over high southern latitudes. These data sets are cross referenced to ground-based measurements from the Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment (AWARE) campaign at McMurdo Station, Antarctica. Compared with AWARE observations, both 2BCL5 and DARDAR underestimate cloud occurrence below 1.5 km, with 2BCL5 and DARDAR distinguishing roughly one third of cloud occurrences observed by AWARE at 0.5 km. While DARDAR identifies greater cloud occurrences than 2BCL5 below 1.5 km, cloud occurrence values for the two data sets have similar differences relative to ground-based measurements. Therefore, the DARDAR retrievals of greater cloud occurrence at low altitudes are likely due to a larger quantity of false positives associated with radar ground clutter or attenuated lidar retrievals. DARDAR cloud occurrences match better with AWARE than 2BCL5 above 5 km. However, the likely underestimation of ground-based measurements at higher altitudes suggests DARDAR may underestimate high level cloud occurrence. Finally, both data sets indicate the presence of liquid containing clouds at temperatures within the homogeneous freezing regime, despite the fact that the ECMWF-AUX data set implemented in their processing clearly indicates temperatures below −38°C. Using AWARE radiosonde (ECMWF-AUX) temperature data, we find that 2BCL5 detects 13.3% (13.8%) of mixed phase clouds below −38°C, while DARDAR detects 5.7% (6.6%) of mixed phase and 1.1% (1.3%) of liquid phase clouds below −38°C. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185407
作者单位	School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand; Gateway Antarctica, University of Canterbury, Christchurch, New Zealand; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University ParkPA, United States
推荐引用方式 GB/T 7714	McErlich C.,McDonald A.,Schuddeboom A.,et al. Comparing Satellite- and Ground-Based Observations of Cloud Occurrence Over High Southern Latitudes[J],2021,126(6).
APA	McErlich C.,McDonald A.,Schuddeboom A.,&Silber I..(2021).Comparing Satellite- and Ground-Based Observations of Cloud Occurrence Over High Southern Latitudes.Journal of Geophysical Research: Atmospheres,126(6).
MLA	McErlich C.,et al."Comparing Satellite- and Ground-Based Observations of Cloud Occurrence Over High Southern Latitudes".Journal of Geophysical Research: Atmospheres 126.6(2021).