基于SPEI指數(shù)的近58a甘肅省干旱特征分析

doi:10.12306/2019jms.0045

首頁 > 過刊瀏覽>2022年第42卷第1期 >99-107. DOI:10.12306/2019jms.0045

基于SPEI指數(shù)的近58a甘肅省干旱特征分析
DOI:
                        10.12306/2019jms.0045
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:P434
基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(41761047)

Analysis of drought characteristics in Gansu Province in recent 58 years based on SPEI index

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計(jì)

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評論

摘要:

利用甘肅省19個(gè)氣象站點(diǎn)1960—2018年逐月平均降水量、氣溫等數(shù)據(jù),應(yīng)用標(biāo)準(zhǔn)化降水蒸散量指數(shù)(Standardized Preapitation Evapotranspiration Index, SPEI)、Penman-Monteith模型、小波分析等方法分析了甘肅省近58 a不同時(shí)間尺度干旱事件的時(shí)空演變特征。結(jié)果表明: 月尺度干旱頻率3月最高,2月最低;季尺度上秋季干旱最嚴(yán)重,春季次之;冬季干旱化趨勢最慢,春季最快。近58 a甘肅省SPEI指數(shù)呈下降趨勢,年尺度SPEI指數(shù)存在8 a、12 a、26 a的周期。干旱發(fā)生頻率在年尺度和月尺度上的分布較為一致,河西走廊東段與甘南州地區(qū)頻率較低,酒泉北部地區(qū)與甘肅省東、中部地區(qū)頻率較高;季尺度上,春季蘭州與武威南部地區(qū)頻率較高,慶陽地區(qū)頻率最低;夏季為白銀與武威北部地區(qū)頻率最高,張掖中部地區(qū)、白銀北部地區(qū)以及臨夏、慶陽、平?jīng)龅貐^(qū)最低;秋季頻率最高的地區(qū)為蘭州東部、定西東北部以及嘉峪關(guān)地區(qū),最低的地區(qū)在酒泉、張掖、武威北部及平?jīng)鲋胁康貐^(qū);冬季高值區(qū)在平?jīng)?低值區(qū)在武威與甘南。干旱發(fā)生強(qiáng)度最高的地區(qū)為張掖,其次為酒泉、慶陽及白銀等地區(qū),最低的區(qū)域位于甘肅西南地區(qū)。酒泉、嘉峪關(guān)等地區(qū)干旱化程度逐年加劇;甘肅東南地區(qū)干旱速率較西北地區(qū)慢;中西部地區(qū)干旱化速率最慢,且甘南北部與武威西南部地區(qū)有濕潤化趨勢。

Abstract:

By using the monthly average precipitation and temperature data of 19 meteorological stations in Gansu Province from 1960 to 2018, the spatio-temporal evolution characteristics of drought events at different time scales over the past 58 years in Gansu Province were analyzed by means of Standardized Precipitation Evapotranspiration Index(SPEI), penman-monteith model and wavelet analysis. The results show that the monthly drought frequency was the highest in March and the lowest in February. The drought was most serious in autumn, followed by spring. The trend of drought is the slowest in winter and the fastest in spring. In recent 58 years, the SPEI index in Gansu Province has been on a downward trend, and the annual scale SPEI index has existed for 8, 12 and 26 years. The distribution of drought frequency on annual scale and monthly scale is consistent. The frequency in the eastern part of Hexi corridor is lower than that in Gannan prefecture, and higher in the northern part of Jiuquan and the eastern and central parts of Gansu Province. On the seasonal scale, the frequency is the higher in the south of Lanzhou and Wuwei, and the lowest in Qingyang in spring. In summer, the frequency is highest in Baiyin and northern Wuwei, and lowest in central Zhangye, northern Baiyin and Linxia, Qingyang and Pingliang regions. The highest frequency in autumn is in the east of Lanzhou, the northeast of Dingxi and Jiayuguan, and the lowest is in the north of Jiuquan, Zhangye and Wuwei and the middle of Pingliang. Winter high value area in Pingliang, low value area in Wuwei and Gannan. The drought intensity was highest in Zhangye, followed by Jiuquan, Qingyang and Baiyin, and lowest in southwest Gansu. The degree of drought in Jiuquan and Jiayuguan is increasing year by year. The drought rate in the southeast of Gansu is slower than that in the northwest. The rate of drought is the slowest in the central and western regions, and there is a wetting trend in the northern part of Gannan and the southwestern part of Wuwei.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

周俊菊,馮煒,向鵑,黃美華.基于SPEI指數(shù)的近58a甘肅省干旱特征分析.氣象科學(xué),2022,42(1):99-107 ZHOU Junju, FENG Wei, XIANG Juan, HUANG Meihua. Analysis of drought characteristics in Gansu Province in recent 58 years based on SPEI index. Journal of the Meteorological Sciences,2022,42(1):99-107

復(fù)制

文章指標(biāo)

點(diǎn)擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2019-06-07
最后修改日期:2019-10-27
錄用日期:
在線發(fā)布日期: 2022-06-01
出版日期: 2022-05-30

文章二維碼

您是第位訪問者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

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

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

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

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

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