Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0129.1 |
Suppression of Cold Weather Events over High-Latitude Continents in Warm Climates | |
Hu, Zeyuan1; Cronin, Timothy W.2; Tziperman, Eli1,3 | |
2018-12-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:23页码:9625-9640 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Recent studies, using Lagrangian single-column atmospheric models, have proposed that in warmer climates more low clouds would form as maritime air masses advect into Northern Hemisphere high-latitude continental interiors during winter (DJF). This increase in low cloud amount and optical thickness could reduce surface radiative cooling and suppress Arctic air formation events, partly explaining both the warm winter high-latitude continental interior climate and frost-intolerant species found there during the Eocene and the positive lapse-rate feedback in future Arctic climate change scenarios. Here the authors examine the robustness of this low-cloud mechanism in a three-dimensional atmospheric model that includes large-scale dynamics. Different warming scenarios are simulated under prescribed CO2 and sea surface temperature, and the sensitivity of winter temperatures and clouds over high-latitude continental interior to mid- and high-latitude sea surface temperatures is examined. Model results show that winter 2-m temperatures on extreme cold days increase about 50% faster than the winter mean temperatures and the prescribed SST. Low cloud fraction and surface longwave cloud radiative forcing also increase in both the winter mean state and on extreme cold days, consistent with previous Lagrangian air-mass studies, but with cloud fraction increasing for different reasons than proposed by previous work. At high latitudes, the cloud longwave warming effect dominates the shortwave cooling effect, and the net cloud radiative forcing at the surface tends to warm high-latitude land but cool midlatitude land. This could contribute to the reduced meridional temperature gradient in warmer climates and help explain the greater warming of winter cold extremes relative to winter mean temperatures. |
英文关键词 | Extreme events Climate change Cloud radiative effects Climate models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449936500001 |
WOS关键词 | CONVECTIVE CLOUD FEEDBACK ; ARCTIC AIR FORMATION ; SEA-ICE ; HEAT-TRANSPORT ; AMPLIFICATION ; MODEL ; BIASES |
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/20310 |
专题 | 气候变化 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA; 2.MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 3.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Hu, Zeyuan,Cronin, Timothy W.,Tziperman, Eli. Suppression of Cold Weather Events over High-Latitude Continents in Warm Climates[J]. JOURNAL OF CLIMATE,2018,31(23):9625-9640. |
APA | Hu, Zeyuan,Cronin, Timothy W.,&Tziperman, Eli.(2018).Suppression of Cold Weather Events over High-Latitude Continents in Warm Climates.JOURNAL OF CLIMATE,31(23),9625-9640. |
MLA | Hu, Zeyuan,et al."Suppression of Cold Weather Events over High-Latitude Continents in Warm Climates".JOURNAL OF CLIMATE 31.23(2018):9625-9640. |
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