東亞旱區氣溶膠、云及其相互作用研究進展
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國家自然科學基金項目(41991231、91937302)及蘭州大學中央高?;究蒲袠I務費專項資金(lzujbky2022kb11)共同資助


Advances in Researches on Properties and Interactions of Aerosols and Clouds over Drylands of East Asian
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    摘要:

    東亞干旱半干旱區(簡稱為“東亞旱區”)是全球干旱帶的重要組成部分,該區域水資源短缺,沙塵暴頻發,沙塵氣溶膠對大氣輻射收支和云微物理過程的影響不可忽視。本文回顧了近年來東亞旱區氣溶膠及云相關科學問題的研究進展,重點討論了氣溶膠、云特性以及氣溶膠-云相互作用問題。東亞旱區大氣中的氣溶膠以沙塵為主,且春季多于其他季節;同時,該區域云水資源豐富,且以高云為主,夏季云量顯著偏多。沙塵氣溶膠可直接影響輻射收支對大氣產生加熱作用,并通過間接和半直接效應對云微物理過程和降水產生影響。由于云微物理觀測資料稀缺,加之模式參數化方案的不準確,導致東亞旱區沙塵氣溶膠-云相互作用仍存在較大的不確定,減小氣溶膠、云所帶來的不確定性是未來氣候變化研究中亟需解決的科學問題。

    Abstract:

    Arid and semi-arid regions of East Asia (“East-Asian drylands”) are the major components of the global arid areas, where water resources are scarce, and dust storms frequently occur. The effects of dust aerosols on atmospheric radiation budget and cloud microphysical processes are nonnegligible over there. By overviewing the research progress of aerosol- and cloud-related issues in the East-Asian drylands, the properties of aerosols and clouds, as well as aerosolcloud interactions, are focused on in this paper. It is found that the aerosols in the East-Asian drylands are dominated by dust aerosols, with the highest optical thickness in spring. Meanwhile, the East-Asian drylands have abundant cloud water resources, which are predominated by high clouds, with higher cloudiness in summer. Dust aerosols can heat the atmosphere by the direct radiative effect and affect the cloud micro-physical processes and precipitation through indirect and semi-direct effects. Due to the limitation of scarce observations and incomplete parameterization in model simulation, there still exist large uncertainties in dust-cloud interactions over the East-Asian drylands. Therefore, reducing the contribution of aerosols and clouds to the uncertainties in climate change research has become an urgent scientific issue in future.

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劉玉芝,羅潤,祝清哲,譚子淵,邵天彬,羅敏,周成龍.東亞旱區氣溶膠、云及其相互作用研究進展[J].氣象科技,2023,51(1):124~133

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  • 收稿日期:2022-01-17
  • 定稿日期:2022-08-22
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  • 在線發布日期: 2023-03-03
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