Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0576.1 |
Glacial Inception on Baffin Island: The Role of Insolation, Meteorology, and Topography | |
Birch, Leah1; Cronin, Timothy2; Tziperman, Eli1,3 | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Geologic evidence suggests that the last glacial inception (115 kya) occurred within the mountains of Baffin Island. Global climate models (GCMs) have difficulty simulating this climate transition, likely because of their coarse horizontal resolution that smooths topography and necessitates the use of cumulus parameterizations. Aregional configuration of the Weather Research and Forecasting (WRF) Model is used to simulate the small-scale topographic and cloud processes neglected by GCMs, and the sensitivity of the region to Milankovitch forcing, topography, and meteorology is tested. It is found that ice growth is possible with 115-kya insolation, realistic topography, and slightly colder-than-average meteorology, represented by specific years within the past three decades. The simulation with low GCM-like topography shows a negative surface mass balance, even with the relevant orbital parameter configuration, demonstrating the criticality of realistic topography. The downslope growth of the ice sheets is studied by looking at the sensitivity of the mass balance to initial snow cover prescribed beyond that of the present day. It is found that the snow-albedo feedback, via its effects on the mass balance, allows such larger snow cover to persist. Implications for GCM studies of glacial inception are discussed. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401007500007 |
WOS关键词 | LAURENTIDE ICE-SHEET ; GENERAL-CIRCULATION MODEL ; EARTH SYSTEM MODEL ; PART II ; KYR BP ; CLIMATE ; SURFACE ; SENSITIVITY ; CYCLES ; GROWTH |
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/20781 |
专题 | 气候变化 |
作者单位 | 1.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 2.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA; 3.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Birch, Leah,Cronin, Timothy,Tziperman, Eli. Glacial Inception on Baffin Island: The Role of Insolation, Meteorology, and Topography[J]. JOURNAL OF CLIMATE,2017,30(11). |
APA | Birch, Leah,Cronin, Timothy,&Tziperman, Eli.(2017).Glacial Inception on Baffin Island: The Role of Insolation, Meteorology, and Topography.JOURNAL OF CLIMATE,30(11). |
MLA | Birch, Leah,et al."Glacial Inception on Baffin Island: The Role of Insolation, Meteorology, and Topography".JOURNAL OF CLIMATE 30.11(2017). |
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