2005—2019年河北省小時降水時空分布特征
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

河北省廊坊市氣象局預報員專項(202001)


Spatial and Temporal Distribution Characteristics of Hourly Precipitation in Hebei Province During 2005-2019
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統計
  • |
  • 參考文獻
  • |
  • 相似文獻
  • |
  • 引證文獻
  • |
  • 資源附件
  • |
  • 文章評論
    摘要:

    利用2005—2019年河北省40個國家氣象觀測站逐小時降水資料,分析小時降水和小時強降水的時空分布特征,結果表明:①小時降水頻率近年來是降低的,而小時強降水頻次沒有明顯的變化趨勢,小時降水量、降水頻率、降水強度以及小時強降水頻次的月變化均呈單峰型分布,小時強降水頻次呈年差異化變大趨勢,使得小時強降水事件發生的極端性更突出;②年降水量總體呈東高西低、南高北低的趨勢,大值區主要位于東北和西南地區,降水頻次和降水強度受地形影響較為明顯,降水頻次大值中心位于海拔較高的北部和中西部,平原頻次較低,而降水強度大值區位于東北部,這是受副熱帶高壓和地形作用共同影響造成的;③河北省降水主要集中在傍晚到夜間,降水峰值出現的時間有自西向東延后的特征,受午后局地對流天氣的影響,最大峰值多出現在17:00前后,小時強降水發生頻次較高;④小時強降水的高發時期是7—8月,主要集中在河北東部和南部,其最大值出現在東北部和石家莊一帶;⑤南部降水量主要源于降水強度的貢獻,北部、西部山區和西北部壩上地區降水量更主要的是受降水頻率的影響;東北部降水量則是降水頻率和降水強度的共同影響造成的。

    Abstract:

    Using the hourly precipitation data from 40 national stations in Hebei Province from 2005 to 2019, the spatial and temporal distribution characteristics of hourly precipitation and heavy hourly precipitation in Hebei Province are analyzed. The results show that: (1) The frequency of hourly precipitation decreased in recent years, while heavy hourly precipitation had no apparent change trend. The monthly changes in hourly precipitation, precipitation frequency, precipitation intensity, and hourly heavy precipitation frequency showed a singlepeak distribution. The hourly heavy precipitation frequency showed a trend of annual differentiation. The differentiation became greater, making the extreme occurrence of hourly heavy precipitation events more prominent. (2) The annual precipitation generally showed a trend of high in the east and low in the west, and high in the south and low in the north. The large value centres were mainly located in the northeast and southwest regions. The frequency and intensity of precipitation were significantly affected by the terrain. The two large value centres of precipitation frequency were located in the northern and centralwestern regions with higher altitude, and that in the plains was lower. However, the area with large precipitation intensity was located in the northeast, caused by the combined influence of the subtropical high and topography. (3) Precipitation in Hebei was mainly concentrated in the evening to night, and the time of peak precipitation appeared to be eastward delayed. Due to the influence of local convective weather in the afternoon, the maximum peak occurred mainly around 17:00 (Beijing time). Hourly heavy precipitation occurred more frequently. (4) The high incidence of heavy hourly precipitation was from July to August, mainly concentrated in the east and south of Hebei. Its maximum value occurred in the northeast and Shijiazhuang. (5) The precipitation in the south was mainly due to the contribution of precipitation intensity. The precipitation in the northern, western mountainous areas and the northwestern Bashang area was more affected by the precipitation frequency; the precipitation in the northeast was caused by the combined effect of precipitation frequency and precipitation intensity.

    參考文獻
    相似文獻
    引證文獻
引用本文

周玉都,許敏,趙瑋,劉艷杰,李娜.2005—2019年河北省小時降水時空分布特征[J].氣象科技,2021,49(6):885~896

復制
分享
文章指標
  • 點擊次數:
  • 下載次數:
  • HTML閱讀次數:
  • 引用次數:
歷史
  • 收稿日期:2020-10-21
  • 定稿日期:2021-09-13
  • 錄用日期:
  • 在線發布日期: 2021-12-29
  • 出版日期: 2021-12-31
您是第位訪問者
技術支持:北京勤云科技發展有限公司
午夜欧美大片免费观看,欧美激情综合五月色丁香,亚洲日本在线视频观看,午夜精品福利在线
>