| 北极地区地面辐射量和云辐射强迫特征 |
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| 引用本文： | 刘凤景,孙俊英,张廷军,程国栋.北极地区地面辐射量和云辐射强迫特征[J].冰川冻土,2000,22(4):384-390. |
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| 作者姓名： | 刘凤景 孙俊英 张廷军 程国栋 |
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| 作者单位： | State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu;Department of Geography and Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, USA 730000,China,Laboratoryof Ice Core and Cold Regions Environment, CAREERI, CAS, Lanzhou Gansu 730000, China,CooperativeInstitute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309,State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000,China |
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| 摘 要： | In this paper the characteristics of surface radiative fluxes and cloud-radiative forcing are reviewed with a focus on the Arctic. Three aspects are addressed, including (i) changes in radiation flux over the global surface; (ii) characteristics of surface fluxes in the Arctic; and (iii) characteristics of cloud-radiative forcing in the Arctic. The clouds not only significantly reduce the peak summer radiative heating of the surface but also reduce the wintertime radiative cooling at the surface in higher latitudes. The downward longwave fluxes dominates the incident radiative fluxes in the Arctic during most of the year. Incoming shortwave fluxes are negligible during late fall, winter and early spring, and even during the midsummer the incoming shortwave fluxes are only slightly greater than the downward longwave fluxes. The total net surface radiative flux is negative for most of the year and only positive during midsummer in the Arctic. The global net cloud-radiative forcing is negative, but the cloud-radiative forcing is positive in the Arctic, showing a warming effect, except for a short period in mid-summer. Positive cloud-radiative forcing in the Arctic is attributed to the presence of snow and ice with high albedo and the absence of solar radiation during the polar night.
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| 关 键 词： | 北极地区 地面辐射量 云辐射强迫特征 |
| 文章编号： | 1000-0240(2000)04-0384-07 |
| 修稿时间： | 1999年12月27日 |
Characteristics of Surface Radiative Fluxes and Cloud-Radiative Forcing with a Focus on the Arctic |
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| LIU Feng-jing,SUN Jun-ying,ZHANG Ting-jun,CHENG Guo-dong.Characteristics of Surface Radiative Fluxes and Cloud-Radiative Forcing with a Focus on the Arctic[J].Journal of Glaciology and Geocryology,2000,22(4):384-390. |
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| Authors: | LIU Feng-jing SUN Jun-ying ZHANG Ting-jun CHENG Guo-dong |
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| Abstract: | In this paper the characteristics of surface radiative fluxes and cloud radiative forcing are reviewed with a focus on the Arctic. Three aspects are addressed, including (i) changes in radiation flux over the global surface; (ii) characteristics of surface fluxes in the Arctic; and (iii) characteristics of cloud radiative forcing in the Arctic. The clouds not only significantly reduce the peak summer radiative heating of the surface but also reduce the wintertime radiative cooling at the surface inhigher latitudes. The downward longwave fluxes dominates the incident radiative fluxes in the Arctic during most of the year. Incoming shortwave fluxes are negligible during late fall, winter and early spring, and even during the midsummer the incoming shortwave fluxes are only slightly greater than the downward longwave fluxes. The total net surface radiative flux is negative for most of the year and only positive during midsummer in the Arctic. The global net cloud radiative forcing is negative, but the cloud radiative forcing is positive in the Arctic, showing a warming effect, except for a short period in mid-summer. Positive cloud-radiative forcing in the Arctic is attributedto the presence of snow and ice with high albedo and the absence of solar radiation during the polar night. |
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| Keywords: | surface radiative fluxes cloud radiative forcing review Arctic |
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