双月刊

ISSN 1006-9895

CN 11-1768/O4

1981~2019年吉林省暖季冷涡降水时空变化特征
作者:
作者单位:

1.吉林省气象科学研究所/长白山气象与气候变化吉林省重点实验室/中高纬度环流系统与东亚季风研究开放实验室;2.吉林省气象台

作者简介:

通讯作者:

基金项目:

其它,国家自然科学基金,国家重点基础研究规划项目


Temporal and Spatial Distribution of Precipitation Related to Northeast Cold Vortex in Warm Season in Jilin Province during 1981—2019
Author:
Affiliation:

1.Laboratory of Research for Middle-High Latitude Circulation Systems and East Asian Monsoon,Institute of Meteorological Sciences of Jilin Province;2.Jilin Meteorological Observatory

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    利用1981—2019年吉林省气象局信息中心提供的吉林省51个测站逐时降水数据,系统分析了暖季吉林省地区冷涡降水的时空分布特征。结果表明:(1)吉林省地区降水量日变化和频次的峰值均发生在下午16—17时;0.1—5mm/h的降水频次大值区主要集中在吉林省东部山区,而5—10mm/h和>10mm/h降水的频次大值区则在吉林省中南部地区。(2)0.1—5mm/h降水占冷涡降水总量百分比(简称:降水贡献)的空间分布特征中,白天降水贡献的空间分布比较一致,夜间大值区在吉林省东部山区;5—10mm/h的降水贡献大值区集中在吉林省中部地区,且白天贡献大于夜间;>10mm/h的降水贡献大值区位于吉林省中西部地区,白天贡献也大于夜间。(3)0.1—5mm/h降水占暖季冷涡降水总量的60%,5—10mm/h和>10mm/h均在20%左右;0.1—5mm/h降水贡献随时间变化减弱趋势明显,而>10mm/h降水贡献增加趋势明显,且这两种量级降水年际变化呈反位相特征。

    Abstract:

    On the basis of quality control of hourly rain-gauge dataset in 39 years (1981—2019) from 51 meteorological stations, provided by the Meteorological Information Center of Jilin province, the spatial and temporal distribution characteristics of precipitation during Northeast cold vortex process in warm season (PNCVPWS) were analyzed. Results showed that: (1) Overall, precipitation in Jilin province showed a clear diurnal variation. The peaks for diurnal precipitation and frequency occurred between 16:00 and 17:00 BJT (Beijing time). The frequency with 0.1—5mm per hour precipitation (P < 5mm h-1) displayed large value in the mountainous area in eastern Jilin province, but the high value center moved to the south-central while the precipitation larger than 5mm per hour (P > 5mm h-1). (2) There was little difference in spatial distribution for the contribution of P < 5mm h-1 to warm seasonal precipitation in Jilin province during daytime, but the value center showed more clearly in mountainous area in eastern Jilin province at night. The contribution of the gauge record between 5mm h-1 and 10mm h-1(5mm h-1 < P < 10mm h-1) was greater in central Jilin province, moreover, the contribution showed greater in daytime than night. But for P > 10mm h-1, the high value center moved to the Midwest of Jilin province, similarly, the contribution value showed greater in daytime than night also. (3) The rainfall amount of P < 5mm h-1 accounted for 61% to total precipitation, and the value of 5mm h-1 < P <10mm h-1 and P > 10mm h-1 was nearly 20%, respectively. The contribution of P < 5mm h-1 had a decreasing trend in recent years, but the value for P > 10mm h-1 increased obviously in contrast.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-10-22
  • 最后修改日期:2021-07-15
  • 录用日期:2021-07-30
  • 在线发布日期:
  • 出版日期: