气候变化领域集成服务门户(CCPortal): Divergence of Arctic shrub growth associated with sea ice decline

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DOI	10.1073/PNAS.2013311117
	Divergence of Arctic shrub growth associated with sea ice decline
	Buchwal A.; Sullivan P.F.; Macias-Fauria M.; Post E.; Myers-Smith I.H.; Stroeve J.C.; Blok D.; Tape K.D.; Forbes B.C.; Ropars P.; Lévesque E.; Elberling B.; Angers-Blondin S.; Boyle J.S.; Boudreau S.; Boulanger-Lapointe N.; Gamm C.; Hallinger M.; Rachlewicz G.; Young A.; Zetterberg P.; Welker J.M.
发表日期	2021
ISSN	00278424
起始页码	33334
结束页码	33344
卷号	117 期号:52
英文摘要	Arctic sea ice extent (SIE) is declining at an accelerating rate with a wide range of ecological consequences. However, determining sea ice effects on tundra vegetation remains a challenge. In this study, we examined the universality or lack thereof in tundra shrub growth responses to changes in SIE and summer climate across the Pan-Arctic, taking advantage of 23 tundra shrub-ring chronologies from 19 widely distributed sites (56°N to 83°N). We show a clear divergence in shrub growth responses to SIE that began in the mid-1990s, with 39% of the chronologies showing declines and 57% showing increases in radial growth (decreasers and increasers, respectively). Structural equation models revealed that declining SIE was associated with rising air temperature and precipitation for increasers and with increasingly dry conditions for decreasers. Decreasers tended to be from areas of the Arctic with lower summer precipitation and their growth decline was related to decreases in the standardized precipitation evapotranspiration index. Our findings suggest that moisture limitation, associated with declining SIE, might inhibit the positive effects of warming on shrub growth over a considerable part of the terrestrial Arctic, thereby complicating predictions of vegetation change and future tundra productivity. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Arctic; Divergence; Sea ice; Shrub rings; Tundra shrubs
语种	英语
scopus关键词	air temperature; Arctic; article; chronology; climate; drought; evapotranspiration; moisture; nonhuman; precipitation; prediction; productivity; sea ice; shrub; structural equation modeling; summer; tundra; vegetation; warming; Arctic; humidity; ice cover; plant development; season; soil; temperature; theoretical model; Arctic Regions; Climate; Humidity; Ice Cover; Models, Theoretical; Plant Development; Seasons; Soil; Temperature
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179622
作者单位	Institute of Geoecology and Geoinformation, Adam Mickiewicz University, Poznan, 61-680, Poland; Department of Biological Sciences, University of Alaska Anchorage, Anchorage, AK 99508, United States; Environment and Natural Resources Institute, University of Alaska Anchorage, Anchorage, AK 99508, United States; School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, United Kingdom; Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, CA 95616, United States; School of GeoSciences, University of Edinburgh, Edinburgh, EH9 3FF, United Kingdom; National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder, CO 80309, United States; Centre for Earth Observation Science, University of Manitoba, Winnipeg, MT R3T 2N2, Canada; Dutch Research Council (NWO), The Hague, 93460, Netherlands; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Arctic Cen...
推荐引用方式 GB/T 7714	Buchwal A.,Sullivan P.F.,Macias-Fauria M.,et al. Divergence of Arctic shrub growth associated with sea ice decline[J],2021,117(52).
APA	Buchwal A..,Sullivan P.F..,Macias-Fauria M..,Post E..,Myers-Smith I.H..,...&Welker J.M..(2021).Divergence of Arctic shrub growth associated with sea ice decline.Proceedings of the National Academy of Sciences of the United States of America,117(52).
MLA	Buchwal A.,et al."Divergence of Arctic shrub growth associated with sea ice decline".Proceedings of the National Academy of Sciences of the United States of America 117.52(2021).