DOI: 10.1007/s00382-017-3629-6
Scopus记录号: 2-s2.0-85016943999
论文题名: Observational estimation of radiative feedback to surface air temperature over Northern High Latitudes
作者: Hwang J. ; Choi Y.-S. ; Kim W.M. ; Su H. ; Jiang J.H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 615
结束页码: 628
语种: 英语
英文关键词: High-latitude climate feedback
; Local radiative feedback
; Observational estimates of feedback
; Radiative kernel
Scopus关键词: air temperature
; climate feedback
; climate modeling
; climate prediction
; longwave radiation
; radiative forcing
; shortwave radiation
; surface temperature
; Terra (satellite)
英文摘要: The high-latitude climate system contains complicated, but largely veiled physical feedback processes. Climate predictions remain uncertain, especially for the Northern High Latitudes (NHL; north of 60°N), and observational constraint on climate modeling is vital. This study estimates local radiative feedbacks for NHL based on the CERES/Terra satellite observations during March 2000–November 2014. The local shortwave (SW) and longwave (LW) radiative feedback parameters are calculated from linear regression of radiative fluxes at the top of the atmosphere on surface air temperatures. These parameters are estimated by the de-seasonalization and 12-month moving average of the radiative fluxes over NHL. The estimated magnitudes of the SW and the LW radiative feedbacks in NHL are 1.88 ± 0.73 and 2.38 ± 0.59 W m−2 K−1, respectively. The parameters are further decomposed into individual feedback components associated with surface albedo, water vapor, lapse rate, and clouds, as a product of the change in climate variables from ERA-Interim reanalysis estimates and their pre-calculated radiative kernels. The results reveal the significant role of clouds in reducing the surface albedo feedback (1.13 ± 0.44 W m−2 K−1 in the cloud-free condition, and 0.49 ± 0.30 W m−2 K−1 in the all-sky condition), while the lapse rate feedback is predominant in LW radiation (1.33 ± 0.18 W m−2 K−1). However, a large portion of the local SW and LW radiative feedbacks were not simply explained by the sum of these individual feedbacks. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109492
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Atmospheric Science and Engineering, Ewha Womans University, Engineer B 353, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, South Korea; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Climate Prediction Department, APEC Climate Center, Busan, South Korea
Recommended Citation:
Hwang J.,Choi Y.-S.,Kim W.M.,et al. Observational estimation of radiative feedback to surface air temperature over Northern High Latitudes[J]. Climate Dynamics,2018-01-01,50(2018-01-02)