Diurnal Variation of Meiyu Rainfall in the Yangtze Plain During Atypical Meiyu Years
Diurnal Variation of Meiyu Rainfall in the Yangtze Plain During Atypical Meiyu Years
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非典型梅雨年长江平原梅雨降雨日变化
DOI：
10.1029/2019jd031742
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发表时间：
2020-01
影响因子：
4.4
通讯作者：
Fu Y. F.
中科院分区：
文献类型：
--
作者：
Zhang A. Q.;Chen Y. L.;Zhou S. N.;Cui C. G.;Wan R.;Fu Y. F.
降水日变化反映了大气热力和动力过程对水循环的影响。利用多个资料，对非典型梅雨年梅雨量的日变化进行了个例分析和统计分析。结果表明：上午的降水主要由强西南气流水汽输送引起，主要由层状像元组成，而下午的降水主要由受上升气流影响的对流像元组成。非典型梅雨年降水日变化呈双峰结构，峰值出现在清晨（06：30 LST）和午后（16：00 LST），与以往报道的正常梅雨年降水日变化的单峰（09：30 LST）不同。进一步的研究表明，上午的峰值与低层水汽通量有关，而下午的峰值则与局地太阳加热有关。此外，长江平原的水汽通量在正常和非典型梅雨期都表现为上午强、下午弱的特征。低层水汽通量的日变化受副高强度和距副高距离的影响。
The diurnal variation of precipitation reflects the influence of atmospheric heat and dynamic processes on the water cycle. Using multiple data sets, we carried out case studies and statistical analysis of the diurnal variation in Meiyu rainfall in atypical Meiyu years. Our results show that the morning precipitation was induced by strong southwesterly moisture transport and was mainly composed of stratiform pixels, whereas the precipitation occurring in the afternoon was mainly composed of convective pixels affected by updrafts. The diurnal variation in precipitation in the atypical Meiyu years appeared as a bimodal structure with peaks in early morning (06:30 LST) and afternoon (16:00 LST), which was different from the single morning peak (09:30 LST) in the normal Meiyu years and reported previously. Further research indicated that the morning peak is related to the low-level water vapor flux, whereas the afternoon peak is related to the local solar heating. In addition, the water vapor flux in the Yangtze Plain was characterized by strong morning and weak afternoon fluxes during both normal and atypical Meiyu periods. The diurnal variation in the low-level water vapor flux is thought to be influenced by the intensity of, and distance from, the subtropical high.
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影响因子：
3.4
作者：
吴志伟;竺夏英;何金海
通讯作者：
何金海
影响因子：
4.9
作者：
S. Nesbitt;E. Zipser
通讯作者：
S. Nesbitt;E. Zipser
影响因子：
8.9
作者：
L. M. Hocking;P. Jonas
通讯作者：
L. M. Hocking;P. Jonas
DOI：
10.1016/0266-9838(86)90039-0
发表时间：
1986-06
期刊：
Environmental Software
影响因子：
--
作者：
Pz
通讯作者：
Pz
DOI：
10.1029/2018jd028368
发表时间：
2018-05
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
M. Xue;Xia Luo;K. Zhu;Zhengqi Sun;Jianfang Fei
通讯作者：
M. Xue;Xia Luo;K. Zhu;Zhengqi Sun;Jianfang Fei