| 新疆北部暖季短时强降水的时空分布特征 |
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| 引用本文： | 李博渊,赵江伟,李新豫.新疆北部暖季短时强降水的时空分布特征[J].新疆气象,2021,15(2):34-41. |
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| 作者姓名： | 李博渊 赵江伟 李新豫 |
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| 作者单位： | 中国气象局乌鲁木齐沙漠气象研究所,新疆阿勒泰地区气象局,新疆阿勒泰地区气象局 |
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| 基金项目： | 国家重点研发计划重点专项(2018YFC1507103)、中亚大气科学研究基金(CAAS201921)共同资助。 |
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| 摘 要： | 基于2013—2019年暖季新疆北部518个自动站逐时降水资料,运用常规统计、归一化及其偏离程度、降水集中度(PCD)和集中期(PCP)等方法,研究该区短时强降水(Flash Heavy Rain,FHR)时空分布和统计特征。结果表明:(1)近7 a新疆北部FHR发生频次年变化大,2016年最多,2014年最少,前者是后者的3.9倍。(2)FHR集中发生在6—7月,6月下旬为峰值,且日变化呈明显的单峰型,峰值主要在17:00—19:00。(3)FHR发生频次集中在山脉的迎风坡和喇叭口地形附近。(4)FHR PCD呈现由南向北、由西向东逐渐集中,阿勒泰地区最集中;PCP自伊犁河谷至天山北坡,从克拉玛依向西、向北逐渐推迟,阿勒泰地区最晚。(5)PCD伊犁河谷、天山北坡年变化呈增大的趋势,其它区域呈减小的趋势。PCP阿勒泰地区、博州、天山北坡年变化呈增大趋势,其它区域呈减小的趋势。
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| 关 键 词： | 新疆北部 短时强降水 时空分布 统计特征 |
| 收稿时间： | 2020/4/20 0:00:00 |
| 修稿时间： | 2020/6/30 0:00:00 |
LI Boyuan 1,2, ZHAO Jiangwei 2,LI Xinyu2 |
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| Li-Boyuan,and.LI Boyuan 1,2, ZHAO Jiangwei 2,LI Xinyu2[J].Bimonthly of Xinjiang Meteorology,2021,15(2):34-41. |
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| Authors: | Li-Boyuan and |
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| Institution: | (Institute of Desert Meteorology of China Meteorological Administration,Urumqi 830002,China;Altay Regional Meteorological Bureau,Altay 836500,China;Xinjiang Ecological Meteorology and Satellite Remote Sensing Center,Urumqi 830002,China) |
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| Abstract: | Based on the hourly precipitation data of 518 automatic stations in the warm season from2013 to 2019 in the north of Xinjiang.Using conventional statistics,normalization and its deviation degree,precipitation concentration degree(PCD),concentration period(PCP),and other methods,the spatial-temporal distribution and statistical characteristics of flash heavy rain(flash heavy rain,FHR)in this area were studied.The results showed that:(1)In the past seven years,the annual frequency of FHR had changed greatly in Northern Xinjiang,the most in 2016 and the least in 2014,and the former is 3.9 times higher than the latter.(2)FHR mainly occurred from June to July,it peaked in late June,and the daily variation was unimodal,the peak value appeared mainly from 17:00 to 19:00.(3)The frequency of FHR was concentrated near the windward slope and the bell mouth of the mountain.(4)FHR PCD was gradually concentrated from south to north and from west to east,Altay was the most concentrated;PCP was from Ili River Valley to the north slope of Tianshan Mountains,From Karamay to the west and north,it was gradually delayed,Altay was the latest.(5)Annual change of PCD in the valley of Ili and the north slope of Tianshan Mountain were increasing,other areas showed a decreasing trend.Annual change of PCD showed an increasing trend in Altay area,Bozhou,northern slope of the Tianshan Mountains,and decreasing trends in the other areas. |
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| Keywords: | Northern Xinjiang short-time heavy rainfall temporal and spatial distribution statistical characteristics |
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