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DOI | 10.1175/JCLI-D-18-0783.1 |
How Tropical Pacific Surface Cooling Contributed to Accelerated Sea Ice Melt from 2007 to 2012 as Ice Is Thinned by Anthropogenic Forcing | |
Baxter, Ian1; 39;Heureux, Michelle2 | |
2019-12-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:24页码:8583-8602 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Hungary |
英文摘要 | Over the past 40 years, the Arctic sea ice minimum in September has declined. The period between 2007 and 2012 showed accelerated melt contributed to the record minima of 2007 and 2012. Here, observational and model evidence shows that the changes in summer sea ice since the 2000s reflect a continuous anthropogenically forced melting masked by interdecadal variability of Arctic atmospheric circulation. This variation is partially driven by teleconnections originating from sea surface temperature (SST) changes in the east-central tropical Pacific via a Rossby wave train propagating into the Arctic [herein referred to as the Pacific-Arctic teleconnection (PARC)], which represents the leading internal mode connecting the pole to lower latitudes. This mode has contributed to accelerated warming and Arctic sea ice loss from 2007 to 2012, followed by slower declines in recent years, resulting in the appearance of a slowdown over the past 11 years. A pacemaker model simulation, in which we specify observed SST in the tropical eastern Pacific, demonstrates a physically plausible mechanism for the PARC mode. However, the model-based PARC mechanism is considerably weaker and only partially accounts for the observed acceleration of sea ice loss from 2007 to 2012. We also explore features of large-scale circulation patterns associated with extreme melting periods in a long (1800 yr) CESM preindustrial simulation. These results further support that remote SST forcing originating from the tropical Pacific can excite significant warm episodes in the Arctic. However, further research is needed to identify the reasons for model limitations in reproducing the observed PARC mode featuring a cold Pacific-warm Arctic connection. |
英文关键词 | Arctic Sea ice Atmospheric circulation Teleconnections Climate variability Decadal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000498885500004 |
WOS关键词 | ARCTIC AMPLIFICATION ; INTERNAL VARIABILITY ; EL-NINO ; TEMPERATURE ; IMPACTS ; MECHANISM ; TIME |
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/225657 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA; 2.Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA; 3.Univ Washington, Appl Phys Lab, Polar Sci Ctr, Seattle, WA 98105 USA; 4.NOAA, Climate Predict Ctr, College Pk, MD USA; 5.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 6.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 7.Inst Geol & Geochem Res, Res Ctr Astron & Earth Sci, Budapest, Hungary; 8.Eotvos Lorand Univ, Dept Meteorol, Budapest, Hungary; 9.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA |
推荐引用方式 GB/T 7714 | Baxter, Ian,39;Heureux, Michelle. How Tropical Pacific Surface Cooling Contributed to Accelerated Sea Ice Melt from 2007 to 2012 as Ice Is Thinned by Anthropogenic Forcing[J]. JOURNAL OF CLIMATE,2019,32(24):8583-8602. |
APA | Baxter, Ian,&39;Heureux, Michelle.(2019).How Tropical Pacific Surface Cooling Contributed to Accelerated Sea Ice Melt from 2007 to 2012 as Ice Is Thinned by Anthropogenic Forcing.JOURNAL OF CLIMATE,32(24),8583-8602. |
MLA | Baxter, Ian,et al."How Tropical Pacific Surface Cooling Contributed to Accelerated Sea Ice Melt from 2007 to 2012 as Ice Is Thinned by Anthropogenic Forcing".JOURNAL OF CLIMATE 32.24(2019):8583-8602. |
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