| 基于梯度观测小时数据的南岳山降水日变化特征 |
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| 引用本文： | 彭莉莉,邓剑波,谢傲.基于梯度观测小时数据的南岳山降水日变化特征[J].湖北气象,2020,39(2):201-206. |
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| 作者姓名： | 彭莉莉 邓剑波 谢傲 |
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| 作者单位： | 湖南省气象科学研究所,长沙410118;气象防灾减灾湖南省重点实验室,长沙,410118,湖南省气象科学研究所,长沙410118;气象防灾减灾湖南省重点实验室,长沙,410118,湖南省气象科学研究所,长沙410118;气象防灾减灾湖南省重点实验室,长沙,410118 |
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| 基金项目： | 湖南省自然科学基金项目;中国气象局武汉暴雨研究所2018基本科研业务费项目;中国气象局省所科技创新发展专项 |
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| 摘 要： | 利用南岳山南坡不同海拔高度上的3个气象观测站2015年9月1日-2018年8月31日逐时降水资料,分析了南岳山降水日演变特征。结果表明:从山底到山顶总降水量逐渐增加,存在3个降水峰值时段,分别在清晨、午后和傍晚,清晨雨量峰值主要由该时段降水频次较高所致,午后与傍晚雨量峰值主要与该时段降水强度较大有关,山顶高山站与山底站降水量差异主要体现在午后与傍晚时段;小时最大降水量主要出现在午后至傍晚,山底站短时强降水出现时段较分散,山腰和山顶高山站短时强降水主要集中在午后至傍晚时段;持续时间小于等于6 h的短持续降水频次多于持续时间大于6 h长持续降水频次,其主要出现在午后至傍晚,长持续降水过程多出现在凌晨至中午,其对总降水量的贡献大于短持续降水。
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| 关 键 词： | 降水 日变化 梯度观测 南岳山 |
Diurnal variation of precipitation at the southern slope in Nanyue Mountain based on hourly rain dataset from gradient observation |
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| PENG Lili,DENG Jianbo,XIE Ao.Diurnal variation of precipitation at the southern slope in Nanyue Mountain based on hourly rain dataset from gradient observation[J].Meteorology Journal of Hubei,2020,39(2):201-206. |
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| Authors: | PENG Lili DENG Jianbo XIE Ao |
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| Institution: | (Hunan Institute of Meteorological Science,Changsha 410118;Key laboratory of Preventing and Reducing Meteorological Disaster,Changsha 410118) |
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| Abstract: | The hourly rain dataset from the three surface weather observation stations with different elevation in the southern slope of Nanyue Mountain between 1 September 2015 and 31 August 2018 are used to analyze the diurnal variation characteristics of precipitation in Nanyue Mountain area.The results show that the total precipitation amount increases with the height from the bottom to top of Nanyue Mountain.There are three diurnal precipitation amount peaks which appear in the early morning,afternoon and early evening,respectively.The precipi tation amount peak in the early morning is mainly caused by the high frequency of precipitation in this period.The precipitation amount peaks in the afternoon and early evening are mainly associated with precipitation intensity in the same time.The difference of precipitation amount between the summit station and the foot station mainly presents in the afternoon and early evening.Hourly precipitation amount reaches maximum in the afternoon and early evening.The occurrence time of short-time strong precipitation at the summit and hillside sta tions is mainly in the afternoon and early evening,which is more centralized than that at the foot of mountain.Short-duration precipitation events lasting from 1 hour to 6 hours usually occur from afternoon to early evening,which has higher frequency than long-duration precipita tion events lasting time longer than 6 hours.The latter usually occurs from wee hours to noon and contributes more to the total precipitation amount than the short-duration precipitation events. |
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| Keywords: | precipitation diurnal variation gradient observation Nanyue Mountain |
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