| DOI: | 10.1002/2014GL060591
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| 论文题名: | Upper atmosphere cooling over the past 33 years |
| 作者: | Ogawa Y.; Motoba T.; Buchert S.C.; Häggström I.; Nozawa S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9891
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| EISSN: | 1944-9622
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| 出版年: | 2014
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| 卷: | 41, 期:15 | | 起始页码: | 5629
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| 结束页码: | 5635
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| 语种: | 英语
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| 英文关键词: | EISCAT
; global warming
; temperature
; thermosphere
; upper atmosphere
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| Scopus关键词: | Cooling
; F region
; Global warming
; Greenhouse gases
; Temperature
; Atmospheric general circulation models
; EISCAT
; Gas concentration
; Incoherent scatter radar
; Ion temperature
; Long-term trend
; Polar ionospheres
; thermosphere
; Data set
; Height profiles
; Upper atmosphere
; Radar
; climate modeling
; concentration (composition)
; cooling
; data set
; estimation method
; greenhouse gas
; troposphere
; upper atmosphere
; Europe
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| 英文摘要: | Theoretical models and observations have suggested that the increasing greenhouse gas concentration in the troposphere causes the upper atmosphere to cool and contract. However, our understanding of the long-term trends in the upper atmosphere is still quite incomplete, due to a limited amount of available and well-calibrated data. The European Incoherent Scatter radar has gathered data in the polar ionosphere above Tromsø for over 33years. Using this long-term data set, we have estimated the first significant trends of ion temperature at altitudes between 200 and 450km. The estimated trends indicate a cooling of 10-15K/decade near the F region peak (220-380km altitude), whereas above 400km the trend is nearly zero or even warming. The height profiles of the observed trends are close to those predicted by recent atmospheric general circulation models. Our results are the first quantitative confirmation of the simulations and of the qualitative expectations. Key Points Upper atmosphere cooling over the past 33 years is observed with EISCAT data Above about 400 km height ionospheric warming is seen The height profiles of the trends are close to those produced by the recent GCM © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905294229&doi=10.1002%2f2014GL060591&partnerID=40&md5=ff0d7d7d5d4bd844117991b05c8d3811
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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/7155
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| Appears in Collections: | 气候减缓与适应
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作者单位: | National Institute of Polar Research, Tokyo, Japan
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| Recommended Citation: | |
Ogawa Y.,Motoba T.,Buchert S.C.,et al. Upper atmosphere cooling over the past 33 years[J]. Geophysical Research Letters,2014-01-01,41(15).
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