globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.05.015
Scopus记录号: 2-s2.0-85048196576
论文题名:
CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis
作者: Milani L.; Kulie M.S.; Casella D.; Dietrich S.; L'Ecuyer T.S.; Panegrossi G.; Porcù F.; Sanò P.; Wood N.B.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 213
起始页码: 121
结束页码: 135
语种: 英语
英文关键词: Antarctica ; CloudSat ; Precipitation ; Radar ; Satellite ; Snowfall
Scopus关键词: Clouds ; Gages ; Oceanography ; Precipitation (chemical) ; Radar ; Reflection ; Satellites ; Sea ice ; Space applications ; Space-based radar ; Antarctic plateau ; Antarctica ; CloudSat ; Era interims ; Near surfaces ; Sensitivity tests ; Southern ocean ; Spatial patterns ; Snow
英文摘要: CloudSat spaceborne radar snowfall retrievals using two different methodologies – the 2C-SNOW-PROFILE (2C-SNOW) CloudSat product and the combined Kulie and Bennartz (2009) technique with the Hiley et al. (2011) reflectivity (Z) to snowfall rate (S) conversion (KBH) - are compared over Antarctica and surrounding Southern Ocean environments. KBH algorithm sensitivity tests are performed to demonstrate how retrievals are affected by algorithm assumptions (e.g., vertical reflectivity continuity test, the choice of near surface bin used to make surface snowfall rate retrievals, and temperature filters). These algorithm components are found to be detrimental to snowfall detection over this region by significantly reducing the snowfall population compared to 2C-SNOW, especially over ocean regions prone to ERA-interim indicated convective snow. After accounting for key algorithm differences, 2C-SNOW mean annual snowfall rates are systematically higher than KBH due to the Z-S relationship adopted. Spatial annual mean snowfall accumulation differences between the two datasets are minimized over interior Antarctica, but large differences are observed over the ocean. 2C-SNOW Z-S relationships for all snowfall events (Z = 10.9 S1.3), over ocean and sea ice (Z = 8.2 S1.3), escarpments and Antarctic coastal areas - below 2000 m a.s.l. (Z = 6.7 S1.4), and Antarctic plateau - above 2000 m a.s.l. (Z = 5.5 S1.6) are also derived. A multi-year 2C-SNOW mean annual snowfall analysis is also provided, and comparisons with ERA-Interim snowfall datasets show similar spatial patterns, but magnitude differences over oceans are observed. A monthly 2C-SNOW and acoustic depth gauge analysis is provided to demonstrate qualitative trends in snowfall accumulation between the respective datasets. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108795
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Institute of Atmospheric Sciences and Climate, National Research Council (ISAC-CNR), Via Fosso del Cavaliere 100, Rome, 00133, Italy; Department of Geological and Mining Engineering and Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, 1225 W. Dayton St, Madison, WI 53706, United States; Department of Physics and Astronomy, University of Bologna, Bologna, Italy; Space Science and Engineering Center, University of Wisconsin-Madison, 1225 W. Dayton St, Madison, WI 53706, United States

Recommended Citation:
Milani L.,Kulie M.S.,Casella D.,et al. CloudSat snowfall estimates over Antarctica and the Southern Ocean: An assessment of independent retrieval methodologies and multi-year snowfall analysis[J]. Atmospheric Research,2018-01-01,213
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