摘要
利用逐日逐时气象资料对岳阳市主城区2019-2021年夏季城市热岛强度进行了评估,探讨了东洞庭湖湖陆风对滨湖夏季气温以及城市热岛强度的影响。结果表明:平均气温郊区较城区、滨湖低1.47、1.11℃,最低气温郊区较城区、滨湖低1.89、2.03℃,最高气温城区较郊区高0.61℃、郊区较滨湖高0.63℃。白天城区气温高于郊区,郊区气温高于滨湖;夜间城区气温与滨湖相当,且明显高于郊区。各区逐时气温变率郊区最大,城区次之,滨湖最小,三者在23时-次日06时相当且变化较小。城区平均、最高、最低气温分别比郊区高1.47、0.61和1.89℃,对应城市热岛强度分别为弱、弱、中等。08-19时城市热岛强度为弱,20时-次日07时为中等。滨湖09-18时湖风强,19时-次日08时陆风弱。湖陆风与各区气温以及城市热岛强度均极显著相关。夜间城市热岛效应强于白天湖泊冷效应,白天城市热岛效应和夜间湖泊热效应受站点与滨湖和郊区的距离远近影响的强度不同,离滨湖越近的城市站白天受城市热岛效应影响越小,夜间受城市热岛效应影响越大。
Based on the daily hourly meteorological data,the intensity of summer urban heat island in the main urban area of Yueyang city during 2019-2021 was evaluated.As the same time,the influence of lake-land breeze on summer temperature and the intensity of urban heat island in eastern Dongting Lake was discussed.The results show that the average temperature in the suburbs is 1.47℃lower than that in urban area and 1.11℃lower than that in lakeside area;the lowest temperature in suburbs is 1.89℃lower than that in urban area and 2.03℃lower than that lakeside area;the maximum temperature in the urban area is 0.61℃higher than that in the suburbs;and that in the suburbs is 0.63℃higher than that in lakeside area.In the daytime,the temperature in urban area is higher than that in the suburbs,which is higher than that in the lake.At night,the temperature in urban area is almost the same as that in the lake,and obviously higher than that in the suburbs.The hourly temperature variation of suburbs is the highest;and which of urban area is the second;and lakeside area’s hourly temperature variation is the lowest.The changes of hourly temperature variation during the time of 23:00 and 06:00 of the next day among these three areas are small.The average,maximum and minimum temperatures in urban areas are 1.47,0.61 and 1.89℃separately higher than those in the suburbs,corresponding urban heat island intensities were weak,weak and medium.The urban heat island intensity from 08:00 to 19:00 is weak,which from 20:00 to 07:00 the next day is moderate.The lakeside breeze from 09:00 to 18:00 is strong,and the land breeze from 19:00 to 08:00 the next day is weak.There is a significant correlation between wind and regional temperature and urban heat island intensity.The lake-land breeze is significantly correlated with the temperature and the intensity of urban heat island.The urban heat island effect at night is stronger than the lake cooling effect during the day.The intensity of the daytime urban heat island effect and the nig
作者
黄菊梅
覃鸿
袁泉
陈世文
王威
HUANG Jumei;QIN Hong;YUAN Quan;CHEN Shiwen;WANG Wei(Dongting Lake National Climatic Observatory,Yueyang 414000,China;Hunan Key Laboratory of Meteorological Disaster Prevention and Reduction,Changsha 410118,China)
出处
《沙漠与绿洲气象》
2024年第3期114-120,共7页
Desert and Oasis Meteorology
基金
湖南省气象局2022年短平快课题(XQKJ22B058)。
关键词
湖陆风
城市热岛
东洞庭湖
湖泊效应
夏季
lake-land breeze
urban heat island
eastern Dongting lake
lake effect
summer
