| DOI: | 10.1002/grl.50174
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| 论文题名: | Exploring links between Arctic amplification and mid-latitude weather |
| 作者: | Screen J.A.; Simmonds I.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9266
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| EISSN: | 1944-8997
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| 出版年: | 2013
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| 卷: | 40, 期:5 | | 起始页码: | 959
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| 结束页码: | 964
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| 语种: | 英语
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| 英文关键词: | Arctic amplification
; circulation
; mid-latitude weather
; Rossby wave
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| Scopus关键词: | Further works
; mid-latitude weather
; Midlatitudes
; Planetary Waves
; Possible mechanisms
; Rossby wave
; Weather extremes
; Boiler circulation
; Ocean currents
; Amplification
; amplification
; amplitude
; meridional circulation
; midlatitude environment
; planetary wave
; Rossby wave
; weather forecasting
; Arctic Ocean
; Asia
; Europe
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| 英文摘要: | This study examines observed changes (1979-2011) in atmospheric planetary-wave amplitude over northern mid-latitudes, which have been proposed as a possible mechanism linking Arctic amplification and mid-latitude weather extremes. We use two distinct but equally-valid definitions of planetary-wave amplitude, termed meridional amplitude, a measure of north-south meandering, and zonal amplitude, a measure of the intensity of atmospheric ridges and troughs at 45°N. Statistically significant changes in either metric are limited to few seasons, wavelengths, and longitudinal sectors. However in summer, we identify significant increases in meridional amplitude over Europe, but significant decreases in zonal amplitude hemispherically, and also individually over Europe and Asia. Therefore, we argue that possible connections between Arctic amplification and planetary waves, and implications of these, are sensitive to how waves are conceptualized. The contrasting meridional and zonal amplitude trends have different and complex possible implications for midlatitude weather, and we encourage further work to better understand these. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876797173&doi=10.1002%2fgrl.50174&partnerID=40&md5=0bc6987b94293d7fbacc21420720f9d4
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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/6530
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| Appears in Collections: | 气候减缓与适应
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作者单位: | School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia
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| Recommended Citation: | |
Screen J.A.,Simmonds I.. Exploring links between Arctic amplification and mid-latitude weather[J]. Geophysical Research Letters,2013-01-01,40(5).
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