| DOI: | 10.1002/2013GL057188
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| 论文题名: | Unprecedented recent summer warmth in Arctic Canada |
| 作者: | Miller G.H.; Lehman S.J.; Refsnider K.A.; Southon J.R.; Zhong Y.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8428
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| EISSN: | 1944-8159
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| 出版年: | 2013
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| 卷: | 40, 期:21 | | 起始页码: | 5745
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| 结束页码: | 5751
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| 语种: | 英语
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| 英文关键词: | Arctic
; Arctic amplification
; recent warming
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| Scopus关键词: | Arctic
; Coupled Model Intercomparison Project
; Model simulation
; Natural climate variabilities
; Radiocarbon dates
; recent warming
; Summer temperature
; Summertime cooling
; Amplification
; Greenhouse gases
; Sea ice
; Snow
; Computer simulation
; air temperature
; climate variation
; glacial environment
; global warming
; numerical model
; radiocarbon dating
; reconstruction
; sea ice
; snow cover
; snowline
; summer
; Arctic
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| 英文摘要: | Arctic air temperatures have increased in recent decades, along with documented reductions in sea ice, glacier size, and snow cover. However, the extent to which recent Arctic warming has been anomalous with respect to long-term natural climate variability remains uncertain. Here we use 145 radiocarbon dates on rooted tundra plants revealed by receding cold-based ice caps in the eastern Canadian Arctic to show that 5000 years of regional summertime cooling has been reversed, with average summer temperatures of the last ~100 years now higher than during any century in more than 44,000 years, including the peak warmth of the early Holocene when high-latitude summer insolation was 9% greater than present. Reconstructed changes in snowline elevation suggest that summers cooled ~2.7°C over the past 5000 years, approximately twice the response predicted by Coupled Model Intercomparison Project Phase 5 climate models. Our results indicate that anthropogenic increases in greenhouse gases have led to unprecedented regional warmth. Key Points Recent Arctic summers are the warmest century in more than 44,000 years First evidence that Arctic is currently warmer than early Holocene thermal maximum Observed Arctic amplification in summer exceeds many model simulations ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887100275&doi=10.1002%2f2013GL057188&partnerID=40&md5=e3530e8bc642cd85a9f44e1f935890ea
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5692
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO 80309-0450, United States
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| Recommended Citation: | |
Miller G.H.,Lehman S.J.,Refsnider K.A.,et al. Unprecedented recent summer warmth in Arctic Canada[J]. Geophysical Research Letters,2013-01-01,40(21).
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