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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >WATER VAPOR FEEDBACK OVER THE ARCTIC OCEAN
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WATER VAPOR FEEDBACK OVER THE ARCTIC OCEAN

机译：北极海洋的水蒸气反馈

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摘要

Previous studies of the clear sky greenhouse effect and water vapor feedback have focused on subpolar regions. In view of modeled amplification of greenhouse warming in the Arctic we investigate the humidity characteristics, clear sky greenhouse effect and water vapor feedback in the Arctic by using 10 years of radiosonde data obtained from the Russian drifting ice island stations along with a radiative transfer model. By taking advantage of the natural variability associated with seasonal and interannual variations, we can infer the water vapor feedback from the data. Results of this study indicate that water vapor feedback over the Arctic Ocean is substantially more complex than in other regions because of the relative lack of convective coupling between the surface and the atmosphere and the different thermodynamic and radiative environment in the Arctic. In particular, the effect of water vapor on the net flux of radiation is complicated by low temperatures, low amounts of water vapor, and the presence of temperature and humidity inversions. During winter a ''hyper'' water vapor feedback arises from the control of ice saturation on the lower tropospheric humidity and a water vapor ''window'' in the rotation band at low atmospheric humidities. Implications for global warming are discussed. [References: 37]
机译：以前关于晴朗的温室效应和水蒸气反馈的研究集中在亚极地区。考虑到北极地区温室效应的模型化放大，我们使用从俄罗斯流冰岛站获得的10年探空仪数据以及辐射转移模型，研究了北极地区的湿度特征，晴朗的天空温室效应和水汽反馈。通过利用与季节和年际变化相关的自然可变性，我们可以从数据中推断出水蒸气的反馈。这项研究的结果表明，由于地表与大气之间的对流耦合相对缺乏以及北极不同的热力学和辐射环境，北冰洋上的水蒸气反馈比其他区域要复杂得多。尤其是，低温，少量的水蒸气以及温度和湿度的倒转会使水蒸气对辐射的净通量的影响变得复杂。在冬季，对流层湿度较低时冰饱和度的控制以及低大气湿度下旋转带中水蒸气“窗口”的控制会产生“高”水蒸气反馈。讨论了对全球变暖的影响。 [参考：37]

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