大氣垂直運動廓線特征及其與云和輻射的關聯(lián)性分析：以CMIP6三個模式為例

doi:10.12306/2022jms.0086

首頁 > 過刊瀏覽>2023年第43卷第4期 >553-560. DOI:10.12306/2022jms.0086

大氣垂直運動廓線特征及其與云和輻射的關聯(lián)性分析：以CMIP6三個模式為例
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                        10.12306/2022jms.0086
                    
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中圖分類號:P412.14
基金項目:國家重點研發(fā)計劃資助項目(2016YFC0202000);國家自然科學基金資助項目(42175021)

Analysis of atmospheric vertical motion profile characteristics and its correlation with cloud and radiation: take the three models of CMIP6 as an example

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基于第六次耦合模式比較計劃(CMIP6)的3個全球氣候模式結果,利用經(jīng)驗正交分解方法和參數(shù)方法分析了模式模擬的熱帶地區(qū)大尺度大氣垂直運動廓線特征并揭示其與云和輻射量的關系。結果表明,基于EOF分解方法,3個模式均可較好地再現(xiàn)熱帶大氣垂直運動特征,即熱帶大氣垂直運動90%以上的方差可由兩個主導的垂直結構模態(tài)解釋,其中EOF1表征大氣的整體上升或下沉,EOF2表征一個由深厚的中層輻合輻散占主導的垂直運動廓線。在此基礎上定義了一對更為簡潔易用的參數(shù)(ω和dω),此對參數(shù)可較好地描述EOF分解所揭示出的垂直運動廓線特征。利用新定義的參數(shù)發(fā)現(xiàn),在西太平洋暖池區(qū)域,高云在"上重"下沉區(qū)域為低值,中云云量在"下重"上升運動區(qū)域為高值。大氣層頂對外長波短波輻射均表現(xiàn)出對運動廓線結構的依賴。研究為評估氣候模式對云和輻射模擬提供了一組有效因子。

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In this study, the characteristics of tropical large scale atmospheric pressure vertical velocity (ω) profiles were analyzed by using the output of three CMIP6 models based on the Empirical Orthogonal Function (EOF) method and the parametric method. Their relationships with cloud and radiation were revealed. It is found that based on EOF method, the three models can reproduce the vertical profile characteristics of the tropical atmosphere,the two leading EOFs explain 90% of the total variance of the structure of the ω profile. The first EOF corresponds to a deep ascending/descending motion of the troposphere. The second EOF represents a thick convergence/divergence layer in the middle troposphere. A pair of parameters (ω and dω) are then defined to characterize of the ω profile. These concise parameters can effectively represent structures captured by the above relatively complex EOF combination, while they are much easier to implement.The relationships between the structure of the ω profile and the model outputted cloud and radiation are then investigated based on the phase space consisted by the ω and dω. The targeted area is the Western Pacific warm pool region. High clouds are more distributed in the region with strong "top heavy" upward motion, mid clouds are more distributed in the region with strong "bottom heavy" upward motion. TOA radiation shows a strong dependence on the rising motion and sinking motion. This study provides a set of effective factors for assessing climate models for cloud and radiation simulations.

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韓波,袁健.大氣垂直運動廓線特征及其與云和輻射的關聯(lián)性分析：以CMIP6三個模式為例.氣象科學,2023,43(4):553-560 HAN Bo, YUAN Jian. Analysis of atmospheric vertical motion profile characteristics and its correlation with cloud and radiation: take the three models of CMIP6 as an example. Journal of the Meteorological Sciences,2023,43(4):553-560

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收稿日期:2022-07-11
最后修改日期:2022-07-13
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在線發(fā)布日期: 2024-01-23
出版日期: 2023-08-15

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