Response of the hydrological cycle to orbital and greenhouse gas forcing
Response of the hydrological cycle to orbital and greenhouse gas forcing
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DOI：
10.1029/2010gl044377
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发表时间：
2010-10
影响因子：
5.2
通讯作者：
V. Khon;W. Park;M. Latif;I. Mokhov;Birgit Schneider
中科院分区：
文献类型：
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作者：
V. Khon;W. Park;M. Latif;I. Mokhov;Birgit Schneider
利用完全耦合的大气-海洋-海冰环流模式（基尔气候模式）评估了水文循环对轨道强迫和大气温室气体（GHG）浓度变化的敏感性。全新世和Eemian期间，轨道诱导的夏季风环流的增强驱动了进入北半球的水汽平流增强，从而使水汽变化率相对于Clausius - Clapeyron方程给出的速率增加了约30%，假设相对湿度恒定。轨道诱导的半球平均降水的变化完全归因于半球间的水汽交换，而不是温室气体强迫的变暖，其中降水的增强是由水汽平流和蒸发的增加引起的。当考虑千年时间尺度上的未来气候时，这两种作用力加起来预计会产生强烈的影响。
The sensitivity of the hydrological cycle to changes in orbital forcing and atmospheric greenhouse gas (GHG) concentrations is assessed using a fully coupled atmosphere‐ocean‐sea ice general circulation model (Kiel Climate Model). An orbitally‐induced intensification of the summer monsoon circulation during the Holocene and Eemian drives enhanced water vapor advection into the Northern Hemisphere, thereby enhancing the rate of water vapor changes by about 30% relative to the rate given by the Clausius‐Clapeyron Equation, assuming constant relative humidity. Orbitally‐induced changes in hemispheric‐mean precipitation are fully attributed to inter‐hemispheric water vapor exchange in contrast to a GHG forced warming, where enhanced precipitation is caused by increased both the moisture advection and evaporation. When considering the future climate on millennial time scales, both forcings combined are expected to exert a strong effect.