| DOI: | 10.1175/JCLI-D-15-0277.1
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| Scopus记录号: | 2-s2.0-84966267357
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| 论文题名: | On the zonal near-constancy of fractional solar absorption in the atmosphere |
| 作者: | Hakuba M.Z.; Folini D.; Wild M.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2016
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| 卷: | 29, 期:9 | | 起始页码: | 3423
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| 结束页码: | 3440
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| 语种: | 英语
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| Scopus关键词: | Absorption
; Incident solar radiation
; Radiation effects
; Solar radiation
; Tropics
; Water vapor
; Cloud radiative effects
; Fractional absorption
; Hemi-spheric asymmetries
; Historical simulation
; Satellite products
; Short-wave radiation
; Southern Hemisphere
; Top of atmospheres
; Water absorption
; adsorption
; albedo
; climatology
; cloud radiative forcing
; meteorology
; shortwave radiation
; Europe
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| 英文摘要: | Over Europe, a recent study found the fractional all-sky atmospheric solar absorption to be largely unaffected by variations in latitude, remaining nearly constant at its regional mean of 23% ± 1%, relative to the respective top-of-atmosphere insolation. The satellite-based CERES EBAF dataset (2000-10) confirms the weak latitude dependence within 23% ± 2%, representative of the near-global scale between 60°S and 60°N. Under clear-sky conditions, the fractional absorption follows the spatial imprint of the water vapor path, peaking in the tropics and decreasing toward the poles, accompanied by a slight hemispheric asymmetry. In the northern extratropics, the clear-sky absorption attains zonal near-constancy due to combined water vapor, surface albedo, and aerosol effects that are largely amiss in the Southern Hemisphere. In line with earlier studies, the CERES EBAF suggests an increase in atmospheric solar absorption due to clouds by on average 1.5% (5 W m-2) from 21.5% (78 W m-2) under clear-sky conditions to 23% (83 W m-2) under all-sky conditions (60°S-60°N). The low-level clouds in the extratropics act to enhance the absorption, whereas the high clouds in the tropics exhibit a near-zero effect. Consequently, clouds reduce the latitude dependence of fractional atmospheric solar absorption and yield a near-constant zonal mean pattern under all-sky conditions. In the GEWEX-SRB satellite product and the historical simulations from phase 5 of CMIP (CMIP5; 1996-2005, multimodel mean) the amount of insolation absorbed by the atmosphere is reduced by around -1.3% (5 W m-2) with respect to the CERES EBAF mean. The zonal variability and magnitude of the atmospheric cloud effect are, however, largely in line. © 2016 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49955
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Institute for Atmospheric and Climate Science, ETH Zurich, Zürich, Switzerland
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| Recommended Citation: | |
Hakuba M.Z.,Folini D.,Wild M.. On the zonal near-constancy of fractional solar absorption in the atmosphere[J]. Journal of Climate,2016-01-01,29(9)
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