基于骨干站网的哈尔滨降水城市效应分析

doi:10.3969/j.issn.1673-503X.2023.03.010

Abstract

Abstract:

Based on the hourly monitoring data of the meteorological backbone automatic stations in Harbin from 2018 to 2021, this paper analyzed the impact of the city on summer precipitation.Results showed that: the heat island intensity in Harbin is 0.79℃ on average in summer with a daily variation that is stronger at night and weaker in daytime.The temperature difference is the largest in the eastern suburbs and the smallest in the northern suburbs.The most and least precipitation in summer is respectively distributed in the eastern suburbs on the downwind side and the southern suburbs on the upwind side in Harbin.The hourly precipitation probability is higher in suburbs than in urban areas, and many precipitations occurring in the afternoon and early morning for the former are respectively delayed and advanced relative to these for the latter.The precipitation probability is greater in urban areas during the daytime and in suburbs at night.The difference of precipitation between daytime and nightime in the northern suburbs is the largest.The maximum hourly precipitation in the suburbs is greater than that in the urban areas.The hourly precipitation intensity in the urban area and the eastern suburbs is larger than in the southern and northern suburbs.Short-duration rainfall in Harbin′s is more frequent and has a greater contribution rate.The precipitation lasting within 6 hours appears most frequently in urban areas, and rarely in the northern suburbs, and that lasting for 6-12 hours appears rarely in urban areas and most frequently in the eastern suburbs, while that beyond 12 hours occurs most frequently in the northern suburbs, and shows the highest contribution rate in the southern suburbs.

Key words: Summer precipitation, Backbone station network, Urban effect of precipitation

CLC Number:

P468.0⁺24/P463.3

Heng-yuan KANG,Yu-lian LIU,Fang YUAN,He-ling ZHOU. Analysis of city effect of precipitation in Harbin based on the backbone station network[J]. Journal of Meteorology and Environment, 2023, 39(3): 79-86.

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地点	日间平均 (07—18时)	夜间平均 (19—23时，00—06时)
城区	10.6	10.2
南郊	10.4	11.2
北郊	10.6	12.1
东郊	11.6	12.1

地点	日间平均/mm	夜间平均/mm	(夜-日)/日 /(%)
城区	232.0	189.1	-18.5
南郊	195.7	180.4	-7.8
北郊	219.2	183.4	-16.3
东郊	224.1	229.8	2.5

地点	主导风向方位	气温差/℃	相对城区降水量百分率/(%)	相对城区降水概率/(%)	小时最大降水量/mm
南郊	上风方	0.82	-10.7	0.4	50.4
东郊	偏下风方	0.88	7.8	1.4	60.2
北郊	下风方	0.66	-4.4	1.0	75.3

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Analysis of city effect of precipitation in Harbin based on the backbone station network

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