華北-華東地區(qū)高溫?zé)崂伺c土壤濕度的關(guān)系研究

doi:10.3969/2014jms.0056

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華北-華東地區(qū)高溫?zé)崂伺c土壤濕度的關(guān)系研究
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                        10.3969/2014jms.0056
                    
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基金項(xiàng)目:公益性行業(yè)(氣象)科研專項(xiàng)(GYHY201006038)

Relationship between summer heat waves and soil moisture in North-East China

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利用觀測(cè)站點(diǎn)的日最高氣溫、土壤濕度旬觀測(cè)資料以及土壤濕度再分析資料等,分析了華北-華東地區(qū)高溫?zé)崂舜螖?shù)的時(shí)空變化特征及其與土壤濕度的關(guān)系。結(jié)果表明:1960s以及1990-2010年為高溫?zé)崂舜螖?shù)的高值期,1970s-1980s為低值期。利用旋轉(zhuǎn)經(jīng)驗(yàn)正交函數(shù)分解得到土壤濕度的3個(gè)氣候分區(qū),分區(qū)內(nèi)前期(3-5月)和同期(6-7月)的土壤濕度與6、7月份高溫?zé)崂舜螖?shù)基本呈負(fù)相關(guān)關(guān)系,并且同期相關(guān)性更顯著。在華北-華東北部與中部,5月下旬土壤濕度與6月高溫?zé)崂舜螖?shù)、6月上、中旬平均土壤濕度與6月高溫?zé)崂舜螖?shù)、7月平均土壤濕度與7月高溫?zé)崂舜螖?shù)的相關(guān)性均顯著。

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Based on the summer daily maximum temperature data, soil moisture observation data of every ten days and soil moisture reanalysis data, the temporal and spatial distribution characteristics of the occurrence of heat waves and its relationship with soil moisture in North-East China were analyzed. Results show that in 1960s and 1990-2010 heat waves occurred frequently, while 1970s-1980s was the low occurrence period. The rotated empirical orthogonal function(REOF) was used to obtain three soil moisture climate zones. Within each region, soil moisture in early(March-May) and corresponding period(June-July) were negatively correlated with heat wave occurrence in June and July, and more significant correlations existed in the corresponding period. In the northeastern and central North-East China, the average soil moisture in late May was significantly related with heat wave occurrence number in June, the average soil moisture in early and mid-June depended remarkably on heat waves occurrence number in June, and the same as in July.

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王麗偉,張杰.華北-華東地區(qū)高溫?zé)崂伺c土壤濕度的關(guān)系研究.氣象科學(xué),2015,35(5):558-564 WANG Liwei, ZHANG Jie. Relationship between summer heat waves and soil moisture in North-East China. Journal of the Meteorological Sciences,2015,35(5):558-564

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收稿日期:2014-03-31
最后修改日期:2014-06-17
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在線發(fā)布日期: 2015-11-13
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