冰晶增長對熱量收支的影響

doi:10.3969/2018jms.0004

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冰晶增長對熱量收支的影響
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                        10.3969/2018jms.0004
                    
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基金項目:國家自然科學基金資助項目（41475039）；國家重點基礎研究與發(fā)展項目（2015CB953601）

The impacts of ice crystal growth on heat budget

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使用二維云分辨模式研究冰晶增長過程（云水到冰晶的凍結增長和通過水汽凝華冰晶到雪的增長）對熱量收支的影響。采用4種冰晶增長參數(shù)化方案模擬了熱帶到中緯度地區(qū)的4個降水個例。研究發(fā)現(xiàn)：（1）高冰核濃度的ZENG方案和SHEN方案引起對流層中上層輻射加熱增多，這與它們模擬的冰晶在對流層中上層增多有關。（2）高冰核濃度的ZENG方案導致模擬區(qū)域-平均的局地溫度變化在對流層上層出現(xiàn)異常減小值，這與它在熱帶個例中導致垂直熱量通量輻合減少和在中緯度個例中導致潛熱加熱減少有關。（3）盡管高冰核濃度的ZENG方案引起質量加權平均的輻射加熱增多，但是它在熱帶個例中引起地表感熱通量減少和在中緯度個例中引起潛熱加熱減少，最終導致4種參數(shù)化方案計算的模擬區(qū)域-質量加權平均的局地溫度變化基本一致。

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A two-dimensional cloud-resolving model was used to study the impacts of ice crystal growth (the depositional growth of cloud ice from cloud water and the depositional growth of snow from cloud ice) on heat budget. Four precipitation events from the tropics to mid-latitudes were simulated with four sets of parameterization scheme for the growth of ice crystal. The main results include the followings:(1) Zeng's scheme with a high ice nuclei concentration and Shen's scheme cause the increase of the radiation heating in upper-middle troposphere, which is associated with the increased quantity of simulated ice crystals in upper-middle troposphere. (2) Zeng's scheme with a high ice nuclei concentration leads to an abnormal reduction in domain-mean local temperature change in the upper troposphere, which results from the reductions in the convergence of vertical heat flux over the tropics and the latent heating over mid-latitudes. (3) Although Zeng's scheme with a high ice nuclei concentration increases the domain-mean mass-weighted radiation heating, it decreases the surface sensible heat flux over the tropics and the latent heating over mid-latitudes. Thus, the four parameterization schemes generate similar domain-mean mass-weighted local temperature changes.

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辛進,李小凡.冰晶增長對熱量收支的影響.氣象科學,2018,38(4):498-511 XIN Jin, LI Xiaofan. The impacts of ice crystal growth on heat budget. Journal of the Meteorological Sciences,2018,38(4):498-511

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收稿日期:2017-03-08
最后修改日期:2017-11-27
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在線發(fā)布日期: 2018-09-14
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