小時(shí)和日值降水?dāng)?shù)據(jù)對河南省暴雨日數(shù)和暴雨日變化特征的影響

doi:10.12306/2021jms.0032

首頁 > 過刊瀏覽>2023年第43卷第1期 >69-79. DOI:10.12306/2021jms.0032

小時(shí)和日值降水?dāng)?shù)據(jù)對河南省暴雨日數(shù)和暴雨日變化特征的影響
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                        10.12306/2021jms.0032
                    
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中圖分類號:P426.62
基金項(xiàng)目:河南省科技攻關(guān)計(jì)劃資助項(xiàng)目(172102310071); 河南省氣象局重點(diǎn)科技攻關(guān)資助項(xiàng)目(Z201501)

The influence on rainstorm days and rainstorm diurnal variation of the hourly and daily precipitation dataset in Henan Province

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摘要:

利用1961—2018年河南省111個(gè)氣象站逐日和逐小時(shí)降水?dāng)?shù)據(jù),分析了暴雨日數(shù)的時(shí)空變化規(guī)律及暴雨日變化特征,并通過統(tǒng)計(jì)對比分析,評估了小時(shí)和日值降水?dāng)?shù)據(jù)對暴雨日數(shù)及暴雨日變化的影響。結(jié)果表明:(1)1961—2018年,河南省年平均暴雨日數(shù)變化呈顯著上升趨勢,速率為0.34 d·(10 a)^-1;94.6%的氣象站點(diǎn)年平均暴雨日數(shù)的氣候傾向率為正,顯著增加的站點(diǎn)數(shù)占總站數(shù)的73.0%;年平均暴雨日數(shù)為1.4 d,以7月最多,平均值為0.52 d,占年平均暴雨日數(shù)的37.1%。(2)1961—2018年,河南省暴雨總降水的日變化呈現(xiàn)單峰結(jié)構(gòu),主峰值出現(xiàn)在05時(shí),為4.5 mm;暴雨日變化峰值呈波動下降趨勢,速率為0.16 mm·(10 a)^-1;日變化峰值大部分出現(xiàn)在00—08時(shí),共42個(gè)年份,占79.3%;從空間分布看,各氣象站點(diǎn)的暴雨日變化峰值大都出現(xiàn)在00—06時(shí),占總站數(shù)的73.5%。(3)2014—2018年,河南省小時(shí)和日值降水?dāng)?shù)據(jù)吻合度為100%;吻合暴雨總降水的日變化的主峰值和次峰值出現(xiàn)在04時(shí)和17時(shí),分別為4.3 mm和3.4 mm;日變化峰值出現(xiàn)在13—18時(shí)的氣象站點(diǎn)最多,占總站數(shù)的33.9%。(4)小時(shí)和日值數(shù)據(jù)對暴雨日數(shù)及暴雨日變化造成了影響,主要表現(xiàn)在年平均暴雨日數(shù)及其變化趨勢不一致和暴雨日變化的差異。

Abstract:

Based on the daily and hourly precipitation dataset of 111 meteorological stations in Henan Province from 1961 to 2018, the spatial and temporal variation characteristics of rainstorm days and the characteristics of the rainstorm diurnal variation were analyzed. Through statistical comparative analysis, the influences on rainstorm days and rainstorm diurnal variation of the hourly and daily precipitation dataset was evaluated. Results are as follows: (1) during 1961-2018, the annual mean rainstorm days in Henan Province shows a significant upward trend, with a rate of 0.34 d·(10 a)^-1. 94.6% of meteorological stations in the province have a positive climatic tendency for the annual mean rainstorm days, and the significantly increased number of stations accounted for 73.0% of the total number of stations. The mean rainstorm days per year is 1.4. July has the most rainstorm days, with a mean of 0.52 day, accounting for 37.1% of the annual mean rainstorm days. (2) During 1961-2018, the diurnal variation of the rainstorm total precipitation in Henan Province presents a single-peak structure, with the main peak value appearing at 05∶00 BST, which is 4.5 mm. The diurnal variation peak of rainstorm shows a fluctuating downward trend, with a rate of 0.16 mm·(10 a)^-1. Most of the diurnal variation peaks occurs between 00∶00 BST and 08∶00 BST, which has 42 years, accounting for 79.3% of total years. From the perspective of spatial distribution, the diurnal variation peaks of rainstorm in meteorological stations occurs between 00∶00 BST and 06∶00 BST, accounting for 73.5% of the total meteorological stations. (3) During 2014-2018, the agreement of hourly and daily precipitation dataset in Henan Province is 100%. The main and secondary peak value of anastomotic rainstorm appears at 04∶00 BST and 17∶00 BST, 4.3 mm and 3.4 mm respectively. Most of the peak of the diurnal variation occurs between 13∶00 BST and 18∶00 BST, accounting for 33.9% of the total stations. (4) The rainstorm days and rainstorm diurnal variation are affected by hourly and daily dataset. The main performance is the annual mean rainstorm days and its variation trend are not consistent and also the difference of the rainstorm diurnal variation.

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丁亞磊,姬興杰,劉美,李鳳秀.小時(shí)和日值降水?dāng)?shù)據(jù)對河南省暴雨日數(shù)和暴雨日變化特征的影響.氣象科學(xué),2023,43(1):69-79 DING Yalei, JI Xingjie, LIU Mei, LI Fengxiu. The influence on rainstorm days and rainstorm diurnal variation of the hourly and daily precipitation dataset in Henan Province. Journal of the Meteorological Sciences,2023,43(1):69-79

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收稿日期:2020-07-23
最后修改日期:2021-02-19
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在線發(fā)布日期: 2023-05-15
出版日期: 2023-02-15

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