Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0706.1 |
Atmospheric Eddies Mediate Lapse Rate Feedback and Arctic Amplification | |
Feldl, Nicole1; Anderson, Bruce T.2; Bordoni, Simona3 | |
2017-11-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Projections of amplified climate change in the Arctic are attributed to positive feedbacks associated with the retreat of sea ice and changes in the lapse rate of the polar atmosphere. Here, a set of idealized aquaplanet experiments are performed to understand the coupling between high-latitude feedbacks, polar amplification, and the large-scale atmospheric circulation. Results are compared to CMIP5. Simulated climate responses are characterized by a wide range of polar amplification (from none to nearly 15-K warming, relative to the low latitudes) under CO2 quadrupling. Notably, the high-latitude lapse rate feedback varies in sign among the experiments. The aquaplanet simulation with the greatest polar amplification, representing a transition from perennial to ice-free conditions, exhibits a marked decrease in dry static energy flux by transient eddies. Partly compensating for the reduced poleward energy flux is a contraction of the Ferrel cell and an increase in latent energy flux. Enhanced eddy energy flux is consistent with the upper-tropospheric warming that occurs in all experiments and provides a remote influence on the polar lapse rate feedback. The main conclusions are that (i) given a large, localized change in meridional surface temperature gradient, the midlatitude circulation exhibits strong compensation between changes in dry and latent energy fluxes, and (ii) atmospheric eddies mediate the nonlinear interaction between surface albedo and lapse rate feedbacks, rendering the high-latitude lapse rate feedback less positive than it would be otherwise. Consequently, the variability of the circulation response, and particularly the partitioning of energy fluxes, offers insights into understanding the magnitude of polar amplification. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416488200021 |
WOS关键词 | SURFACE ALBEDO FEEDBACK ; TEMPERATURE FEEDBACKS ; POLAR AMPLIFICATION ; STATIC STABILITY ; CLIMATE MODELS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20293 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 2.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA; 3.CALTECH, Environm Sci & Engn, Pasadena, CA 91125 USA |
推荐引用方式 GB/T 7714 | Feldl, Nicole,Anderson, Bruce T.,Bordoni, Simona. Atmospheric Eddies Mediate Lapse Rate Feedback and Arctic Amplification[J]. JOURNAL OF CLIMATE,2017,30(22). |
APA | Feldl, Nicole,Anderson, Bruce T.,&Bordoni, Simona.(2017).Atmospheric Eddies Mediate Lapse Rate Feedback and Arctic Amplification.JOURNAL OF CLIMATE,30(22). |
MLA | Feldl, Nicole,et al."Atmospheric Eddies Mediate Lapse Rate Feedback and Arctic Amplification".JOURNAL OF CLIMATE 30.22(2017). |
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