次網(wǎng)格坡地輻射參數(shù)化對RegCM4.1模式模擬東亞夏季氣候的影響

doi:10.3969/2018jms.0014

首頁 > 過刊瀏覽>2018年第38卷第5期 >585-595. DOI:10.3969/2018jms.0014

次網(wǎng)格坡地輻射參數(shù)化對RegCM4.1模式模擬東亞夏季氣候的影響
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                        10.3969/2018jms.0014
                    
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基金項(xiàng)目:國家自然科學(xué)基金（91537102）；中國科學(xué)院寒旱區(qū)陸面過程與氣候變化重點(diǎn)實(shí)驗(yàn)室開放基金（LPCC201502）；中央高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金；江蘇省氣候變化協(xié)同創(chuàng)新中心資助資金及江蘇高校"青藍(lán)工程"項(xiàng)目資助

Effects of subgrid-scale orographic radiation parameterization on RegCM4.1's performance in simulating the climate over East Asia in summer

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本研究將次網(wǎng)格坡地輻射參數(shù)化方案引入到區(qū)域氣候模式（RegCM4.1）中，并研究次網(wǎng)格坡地輻射參數(shù)化對RegCM4.1模擬東亞夏季氣候性能的影響。結(jié)果表明：RegCM4.1高估了夏季青藏高原的熱源作用，模擬低層偏強(qiáng)的西南季風(fēng)導(dǎo)致了模擬的中國夏季降水量總體偏大。引入次網(wǎng)格坡地輻射參數(shù)化方案后，模式模擬的青藏高原夏季地表太陽輻射通量和長波輻射通量減小分別可達(dá)5%和12%以上，夏季減弱的青藏高原熱源作用使得低層西南季風(fēng)減弱，從而改善了模式對中國夏季降水的模擬；而且改善程度自東南向西北遞減，在東南地區(qū)模擬夏季降水的相對均方根誤差減小9%，空間相關(guān)系數(shù)和Taylor評分分別提高0.14和0.08。

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Regional Climate Model version 4.1 (RegCM4.1) is coupled with subgrid-scale orographic radiation parameterization scheme (SORP) and the effect of which on the performance of RegCM4.1 in simulating the climate of East Asia in summer has been systematically investigated in this study. Results have shown that RegCM4.1 overestimates the heat source of the Tibetan Plateau, the southwest monsoon and the precipitation over China in summer. Compared with those simulated by RegCM4.1 without SORP, the surface long-wave and solar radiation fluxes simulated by RegCM4.1 with SORP decline more than 12% and 5% over the Tibetan Plateau, the decreased surface long-wave and solar radiation fluxes simulated by RegCM4.1 with SORP lead to the weakened heat source of the Tibetan Plateau and southwest monsoon and thereafter the improvement of the precipitation simulation in summer. The improvement of the precipitation simulation in summer declines from southeastern China to northwestern China. Over the southeastern China, the spacial correlation coefficient and Taylor skill score of the simulated summer precipitation increase 0.14 and 0.08, the relative root mean square error decreases about 9%.

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顧春雷,方德賢,周洋,黃安寧.次網(wǎng)格坡地輻射參數(shù)化對RegCM4.1模式模擬東亞夏季氣候的影響.氣象科學(xué),2018,38(5):585-595 GU Chunlei, FANG Dexian, ZHOU Yang, HUANG Anning. Effects of subgrid-scale orographic radiation parameterization on RegCM4.1's performance in simulating the climate over East Asia in summer. Journal of the Meteorological Sciences,2018,38(5):585-595

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收稿日期:2017-10-17
最后修改日期:2018-01-02
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在線發(fā)布日期: 2018-10-12
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