globalchange  > 气候减缓与适应
DOI: 10.1029/2018JD028349
Scopus记录号: 2-s2.0-85049839756
论文题名:
Bias and Sensitivity of Boundary Layer Clouds and Surface Radiative Fluxes in MERRA-2 and Airborne Observations Over the Beaufort Sea During the ARISE Campaign
作者: Segal Rozenhaimer M.; Barton N.; Redemann J.; Schmidt S.; LeBlanc S.; Anderson B.; Winstead E.; Corr C.A.; Moore R.; Thornhill K.L.; Cullather R.I.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:12
起始页码: 6565
结束页码: 6580
语种: 英语
英文关键词: airborne observations ; Arctic Ocean ; boundary layer clouds ; marginal ice zone ; surface fluxes
Scopus关键词: airborne survey ; atmospheric modeling ; boundary layer ; marginal ice zone ; observational method ; open water ; radiative transfer ; sea ice ; surface flux ; water content ; Arctic Ocean ; Arctic Ocean ; Beaufort Sea
英文摘要: The representation of Arctic surface radiative fluxes in atmospheric models and reanalyses is integral to understanding relevant physical processes, yet testing of these models is confounded by a scarcity of in situ observations of near-surface atmospheric state profiles, cloud vertical structure, cloud phase, and surface properties. Here, airborne measurements obtained from the Arctic Radiation IceBridge Sea&Ice Experiment (ARISE) during fall 2014 are compared with concurrent products from the Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2). Both data sets are then used as input to a radiative transfer model to produce surface radiative fluxes over multiple locations in the Beaufort Sea under the various conditions observed during ARISE. The sensitivity of the simulated fluxes is assessed and compared between these two data sets. Then, the relative contribution of atmospheric state, boundary layer clouds, and their properties to the sensitivity of the simulated surface fluxes is assessed. In our comparisons with ARISE observations we found that MERRA-2 has a warm temperature bias near the surface and it underestimates near-surface clouds and cloud liquid and ice water content. These prevail over both open water and sea ice surfaces. Our sensitivity analysis showed that boundary layer cloud vertical structure and water content account for more than 70% of the difference between MERRA-2 and the radiative fluxes calculated from airborne observations and that differences in boundary layer atmospheric state parameters contribute about 10–20% to the positive bias in the longwave surface flux. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113690
Appears in Collections:气候减缓与适应

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作者单位: NASA Ames Research Center, Moffett Field, CA, United States; Bay Area Environmental Research Institute, Petaluma, CA, United States; Naval Research Laboratory, Monterey, CA, United States; University of Colorado Boulder, Department of Atmospheric and Oceanic Sciences, LASP, Boulder, CO, United States; NASA Langley Research Center, Hampton, VA, United States; Science Systems and Applications (SSAI), Hampton, VA, United States; Bennigton College, Department of Science and Mathematics, Bennington, VT, United States; NASA Goddard Space Flight Center, Global Modeling and Assimilation Office, Greenbelt, MD, United States; University of Maryland, Earth System Science Interdisciplinary Center, College Park, MD, United States

Recommended Citation:
Segal Rozenhaimer M.,Barton N.,Redemann J.,et al. Bias and Sensitivity of Boundary Layer Clouds and Surface Radiative Fluxes in MERRA-2 and Airborne Observations Over the Beaufort Sea During the ARISE Campaign[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(12)
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