| 1981～2019年吉林省暖季冷涡降水时空变化特征 |
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| 引用本文： | 李尚锋,任航,高枞亭,尹路婷,杨旭.1981～2019年吉林省暖季冷涡降水时空变化特征[J].大气科学,2022,46(1):1-14. |
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| 作者姓名： | 李尚锋 任航 高枞亭 尹路婷 杨旭 |
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| 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，长春130062 |
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| 基金项目： | 国家重点研发计划重点专项2018YFC1507300，国家自然科学基金项目41875119、41630424、41975101，中国气象局省级气象科研所科技创新发展项目SSFZ201806，东北区域气象中心创新联合攻关任务合作项目2019QYLH1-2，吉林省科技发展计划项目20180201035SF |
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| 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冷涡降水的时空分布特征.结果 表明:(1)吉林省降水量日变化和频次的峰值均发生在下午16～18时(北京时);0.1～5 mm/h降水频次大值区主要集中在吉林省东部山区,而5～10 mm/h和＞10 mm/h降水频次大值区...
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| 关 键 词： | 吉林地区 暖季 冷涡降水 日变化 |
| 收稿时间： | 2020-10-22 |
Temporal and Spatial Distributions of Precipitation Related to the Northeast Cold Vortex in the Warm Season in Jilin Province during 1981-2019 |
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| LI Shangfeng,REN Hang,GAO Zongting,YIN Luting,YANG Xu.Temporal and Spatial Distributions of Precipitation Related to the Northeast Cold Vortex in the Warm Season in Jilin Province during 1981-2019[J].Chinese Journal of Atmospheric Sciences,2022,46(1):1-14. |
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| Authors: | LI Shangfeng REN Hang GAO Zongting YIN Luting YANG Xu |
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| Institution: | 1.Jilin Provincial Key Laboratory of Changbai Mountain Meteorology & Climate Change/Laboratory of Research for Middle–High Latitude Circulation Systems and East Asian Monsoon, Institute of Meteorological Sciences of Jilin Province, Changchun 1300622.Key Opening Laboratory for Northeast China Cold Vortex Research, Shenyang 1100163.Jilin Meteorological Observatory, Changchun 130062 |
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| Abstract: | Based on quality control of the 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 the northeast cold vortex process in the warm season were analyzed. Results showed that: (1) Overall, precipitation in Jilin Province exhibited a clear diurnal variation. The peaks of diurnal precipitation and frequency occurred during 1600–1800 BJT (Beijing time). Frequency of 0.1–5 mm h?1 precipitation (P＜5 mm h?1) exhibited a large value in the mountainous area in eastern Jilin Province. However, the high-value center moved to the south–central part of Jilin Province, whereas the precipitation was larger than 5 mm h?1 (P＞5 mm h?1). (2) Only a slight difference in the spatial distribution of the contribution of P＜5 mm h?1 to warm-season precipitation in Jilin Province during the daytime was observed. However, the value center was detected more clearly in the mountainous area in eastern Jilin Province at night. The contribution of the gauge record between 5 mm h?1 and 10 mm h?1 (5 mm h?1＜P＜10 mm h?1) was greater in central Jilin Province. Moreover, the contribution was greater during the daytime than at night. By contrast, for P＞10 mm h?1, the high-value center moved to the mid-west of Jilin Province. Similarly, the contribution was greater during the daytime than at night. (3) The rainfall amount of P＜5 mm h?1 accounted for 61% of total precipitation, and the rainfall amounts of 5 mm h?1＜P＜10 mm h?1 and P＞10 mm h?1 accounted for about 20% of total precipitation. The contribution of P＜5 mm h?1 exhibited a decreasing trend in recent years. By contrast, the contribution of P＞10 mm h?1 exhibited an increasing trend. |
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