Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4579-3 |
Detecting the statistical significance of the trends in the Antarctic sea ice extent: an indication for a turning point | |
Ludescher, Josef1,2; Yuan, Naiming3; Bunde, Armin1 | |
2019-07-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:237-244 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Peoples R China |
英文摘要 | In the past decades, the Antarctic sea ice extent (SIE) has been steadily increasing, but recently showed a sharp decline. Here we address the questions whether (1) the observed changes in the Antarctic SIE can be fully explained by natural variability and (2) whether the recent unprecedented decline in the SIE can serve as an indication that the long-term positive trend has reached a turning point entailing further decline. To study these questions, we extended the analysis period of previous studies (until 2013) by considering data until May 2018 and applied a statistical model which accurately reflects the natural variability of the SIE. Contrary to earlier detection studies we find that none of the annual trends of the SIE in whole Antarctica and its five sectors are statistically significant. When studying the seasonal changes, we find that the only trends in the Antarctic SIE that cannot be explained by natural variability and are probably tied to the warming of the Antarctic Peninsula, are the negative trends of the SIE in austral autumn (p=0.043) and February (p=0.012) in the Bellinghausen and Amundsen Seas (BellAm). In contrast, when the recent decline is omitted from the analysis and only data until 2015 are included, the (annual and seasonal) increases of the SIE in whole Antarctica and the Ross Sea become significant, while the significance of the decreasing trends in BellAm is slightly decreased. We consider this as a first indication that the Antarctic SIE may have reached a turning point towards a further decrease. |
英文关键词 | Antarctica Sea ice extent Natural variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471722400014 |
WOS关键词 | LONG-RANGE CORRELATIONS ; OZONE HOLE ; MULTIFRACTALITY ; VARIABILITY ; PERSISTENCE |
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/184369 |
专题 | 气候变化 |
作者单位 | 1.Justus Liebig Univ Giessen, Inst Theoret Phys, Heinrich Buff Ring 16, D-35392 Giessen, Germany; 2.Potsdam Inst Climate Impact Res, D-14473 Potsdam, Germany; 3.Chinese Acad Sci, Inst Atmospher Phys, CAS Key Lab Reg Climate Environm Temperate East A, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Ludescher, Josef,Yuan, Naiming,Bunde, Armin. Detecting the statistical significance of the trends in the Antarctic sea ice extent: an indication for a turning point[J]. CLIMATE DYNAMICS,2019,53:237-244. |
APA | Ludescher, Josef,Yuan, Naiming,&Bunde, Armin.(2019).Detecting the statistical significance of the trends in the Antarctic sea ice extent: an indication for a turning point.CLIMATE DYNAMICS,53,237-244. |
MLA | Ludescher, Josef,et al."Detecting the statistical significance of the trends in the Antarctic sea ice extent: an indication for a turning point".CLIMATE DYNAMICS 53(2019):237-244. |
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