DOI: 10.1029/2018JD028805
Scopus记录号: 2-s2.0-85050723019
论文题名: Evaluation of Radiation and Clouds From Five Reanalysis Products in the Northeast Pacific Ocean
作者: Schmeisser L. ; Hinkelman L.M. ; Ackerman T.P.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 14 起始页码: 7238
结束页码: 7253
语种: 英语
英文关键词: atmospheric reanalysis
; CERES EBAF
; cloud fraction
; Northeast Pacific
; surface radiative fluxes
英文摘要: Atmospheric reanalyses are valuable tools for studying the atmosphere, as they provide temporally and spatially complete coverage of atmospheric variables. However, some regions are susceptible to large biases in reanalysis products due to the scarce data available to assimilate into the reanalyses. Consequently, evaluation of reanalyses using available measurements is essential for quantifying regional errors. Here we use NASA's CERES satellite estimates to evaluate surface radiative fluxes and total cloud fraction in the Northeast Pacific from five reanalysis products—ERA-Interim, MERRA2, JRA-55, NCEP2, and CFSR—from years 2001 to 2015. Results show that biases of surface incident shortwave radiative flux in reanalyses compared to satellite estimates range from 3.8 (CFSR) to 21.2 Wm-2 (NCEP2), with significant biases in JRA-55 and NCEP2. Mean surface downward longwave radiative flux in the reanalysis products is biased by −8.9 (MERRA2) to 3.9 Wm−2 (JRA-55), with significant biases in MERRA2 and NCEP2. Errors in the surface radiative fluxes are partially linked to differences in total cloud fraction in the satellite estimates and reanalyses, which show significant negative biases ranging from −8% (CFSR) to −21.7% (NCEP2). There is not one reanalysis that outperforms the rest in the NE Pacific. The most appropriate data set depends on the variables of interest, subregion of the NE Pacific being studied, time period of interest, and whether the reanalysis data will be used to study long-term or short-term climate processes. Using the errors presented for each reanalysis data set can help guide appropriate use and bound uncertainty for the five reanalysis products analyzed. ©2018. 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/113486
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States
Recommended Citation:
Schmeisser L.,Hinkelman L.M.,Ackerman T.P.. Evaluation of Radiation and Clouds From Five Reanalysis Products in the Northeast Pacific Ocean[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(14)