一種大范圍干旱的識別方法及其應(yīng)用

doi:10.12306/2021jms.0028

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一種大范圍干旱的識別方法及其應(yīng)用
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                        10.12306/2021jms.0028
                    
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中圖分類號:P426.616
基金項(xiàng)目:國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目（2016YFA0601504）

An identification method for a large-scale drought and its application

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基于日本APHRO格點(diǎn)降水?dāng)?shù)據(jù)計(jì)算格點(diǎn)SPI序列，兼顧時(shí)空連續(xù)性，定義了一種大范圍長歷時(shí)干旱的識別方法。該方法以我國國土面積的10%作為大范圍干旱事件影響范圍的最小閾值，同時(shí)給定了干旱事件影響區(qū)域的空間連續(xù)和時(shí)間連續(xù)的判定標(biāo)準(zhǔn)，另輔以干旱烈度計(jì)算方法和干旱中心的識別方法，給出了此類干旱事件的面積、歷時(shí)、烈度及干旱中心的指數(shù)定義和事件的識別過程。在此基礎(chǔ)上，識別了我國1961-2015年以來的69次大范圍干旱事件，得出這69次大范圍干旱事件的平均面積指數(shù)為30.49%，平均干旱歷時(shí)為8.15個(gè)月，平均干旱烈度為-4.192。利用此方法對1998-2002年發(fā)生在華北地區(qū)的持續(xù)性區(qū)域干旱事件進(jìn)行再分析。結(jié)果表明，這一時(shí)期的干旱事件不僅局限于華北地區(qū)，同時(shí)也波及到東北、西北、西南和東南等地，涉及了4次大范圍長歷時(shí)的干旱過程。

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The APHRO grid precipitation data was used to calculate SPI series. Taking the continuity of time and space into account, a identifying method of large-scale drought events featureswas formulated, which takes 10% of Chinese land area as a minimum threshold of a large-scale drought event, and gives the criteria of spatial continuity and temporal continuity of the affected area of drought events. At the same time, with the recognition method of droughtcenterand calculation method of drought intensity, the area, duration, intensity and the drought index definitions and event identification process were given. And 69 long-scale drought events in China from 1961 to 2015 were assessed, which conclude that the average area index, average drought duration and average drought intensity are 30.49%, 8.15 months and -4.192 in China from 1961 to 2015. In addition, a persistent drought event occurred in North China from 1998 to 2002 was reanalyzed. Results show that notonly North China were affected by this drought, but Northwest China, Northeast China, Southwest China and Southeast China etc. Specifically, four large-scale droughts occurred in China from 1998 to 2002.

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殷雨婷,榮艷淑,呂星玥,劉書言.一種大范圍干旱的識別方法及其應(yīng)用.氣象科學(xué),2021,41(4):495-506 YIN Yuting, RONG Yanshu, Lü Xingyue, LIU Shuyan. An identification method for a large-scale drought and its application. Journal of the Meteorological Sciences,2021,41(4):495-506

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收稿日期:2020-12-22
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抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说