globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-11-00363.1
Scopus记录号: 2-s2.0-84862060952
论文题名:
Does global warming cause intensified interannual hydroclimate variability?
作者: Seager R.; Naik N.; Vogel L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期:9
起始页码: 3355
结束页码: 3372
语种: 英语
Scopus关键词: Atmosphere variability ; Circulation anomalies ; Climate variability ; Climate warms ; Coupled Model Intercomparison Project ; High Latitudes ; Hydrologic cycles ; Interannual ; Interannual variability ; Specific humidity ; Subtropical regions ; Twentieth century ; Atmospheric pressure ; Climate change ; Climatology ; Nickel compounds ; Tropics ; Global warming ; annual variation ; atmospheric circulation ; climate variation ; climatology ; El Nino-Southern Oscillation ; ensemble forecasting ; global warming ; humidity ; hydrological cycle ; precipitation assessment ; thermodynamics ; North America ; Pacific Ocean ; Pacific Ocean (Tropical)
英文摘要: The idea that global warming leads to more droughts and floods has become commonplace without clear indication of what is meant by this statement. Here, the authors examine one aspect of this problem and assess whether interannual variability of precipitation P minus evaporation E becomes stronger in the twenty-first century compared to the twentieth century, as deduced from an ensemble of models participating in Coupled Model Intercomparison Project 3. It is shown that indeed interannual variability of P - E does increase almost everywhere across the planet, with a few notable exceptions such as southwestern North America and some subtropical regions. The variability increases most at the equator and the high latitudes and least in the subtropics. Although most interannual P - E variability arises from internal atmosphere variability, the primary potentially predictable component is related to the El Niño-Southern Oscillation (ENSO). ENSOdriven interannual P - E variability clearly increases in amplitude in the tropical Pacific, but elsewhere the changes are more complex. This is not surprising in that ENSO-driven P - E anomalies are primarily caused by circulation anomalies combining with the climatological humidity field. As climate warms and the specific humidity increases, this term leads to an intensification of ENSO-driven P - E variability. However, ENSOdriven circulation anomalies also change, in some regions amplifying but in others opposing and even overwhelming the impact of rising specific humidity. Consequently, there is sound scientific basis for anticipating a general increase in interannual P - E variability, but the predictable component will depend in a more complex way on both thermodynamic responses to global warming and on how tropically forced circulation anomalies alter. © 2012 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52437
Appears in Collections:气候变化事实与影响

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作者单位: Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Columbia College, New York, NY, United States

Recommended Citation:
Seager R.,Naik N.,Vogel L.. Does global warming cause intensified interannual hydroclimate variability?[J]. Journal of Climate,2012-01-01,25(9)
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