DOI: 10.1002/2015JD024546
论文题名: Status of high-latitude precipitation estimates from observations and reanalyses
作者: Behrangi A. ; Christensen M. ; Richardson M. ; Lebsock M. ; Stephens G. ; Huffman G.J. ; Bolvin D. ; Adler R.F. ; Gardner A. ; Lambrigtsen B. ; Fetzer E.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 9 起始页码: 4468
结束页码: 4486
语种: 英语
英文关键词: high latitude
; observation
; precipitation
; reanalysis
; remote sensing
Scopus关键词: climate modeling
; CloudSat
; latitudinal gradient
; Northern Hemisphere
; open ocean
; precipitation assessment
; rainfall
; remote sensing
; satellite data
; seasonality
; snow
; snow accumulation
; Antarctica
; Arctic
; Eurasia
; Greenland
英文摘要: An intercomparison of high-latitude precipitation characteristics from observation-based and reanalysis products is performed. In particular, the precipitation products from CloudSat provide an independent assessment to other widely used products, these being the observationally based Global Precipitation Climatology Project (GPCP), Global Precipitation Climatology Centre, and Climate Prediction Center Merged Analysis of Precipitation (CMAP) products and the ERA-Interim, Modern-Era Retrospective Analysis for Research and Applications (MERRA), and National Centers for Environmental Prediction-Department of Energy Reanalysis 2 (NCEP-DOE R2) reanalyses. Seasonal and annual total precipitation in both hemispheres poleward of 55° latitude are considered in all products, and CloudSat is used to assess intensity and frequency of precipitation occurrence by phase, defined as rain, snow, or mixed phase. Furthermore, an independent estimate of snow accumulation during the cold season was calculated from the Gravity Recovery and Climate Experiment. The intercomparison is performed for the 2007-2010 period when CloudSat was fully operational. It is found that ERA-Interim and MERRA are broadly similar, agreeing more closely with CloudSat over oceans. ERA-Interim also agrees well with CloudSat estimates of snowfall over Antarctica where total snowfall from GPCP and CloudSat is almost identical. A number of disagreements on regional or seasonal scales are identified: CMAP reports much lower ocean precipitation relative to other products, NCEP-DOE R2 reports much higher summer precipitation over Northern Hemisphere land, GPCP reports much higher snowfall over Eurasia, and CloudSat overestimates precipitation over Greenland, likely due to mischaracterization of rain and mixed-phase precipitation. These outliers are likely unrealistic for these specific regions and time periods. These estimates from observations and reanalyses provide useful insights for diagnostic assessment of precipitation products in high latitudes, quantifying the current uncertainties, improving the products, and establishing a benchmark for assessment of climate models. © 2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62871
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: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, United Kingdom; Atmospheric Oceanic and Planetary Physics, University of Oxford, Oxford, United Kingdom; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States
Recommended Citation:
Behrangi A.,Christensen M.,Richardson M.,et al. Status of high-latitude precipitation estimates from observations and reanalyses[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)