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作 者:桂煜 袁仁民[1] 吴晓庆[2] 陶小平[3] 崔延宣 刘豪 GUI Yu;YUAN Renmin;WU Xiaoqing;TAO Xiaoping;CUI Yanxuan;LIU Hao(School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China)
机构地区:[1]中国科学技术大学地球和空间科学学院,安徽合肥230026 [2]中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室,安徽合肥230031 [3]中国科学技术大学物理学院,安徽合肥230026
出 处:《中国科学技术大学学报》2020年第6期777-783,共7页JUSTC
基 金:国家自然科学基金(41775014,51677175)资助.
摘 要:利用2013年1月5日~10月10日城、郊自动气象站和涡度相关系统观测数据,从气象要素、城市热岛强度、地表能量平衡三个方面定量分析了合肥市城、郊的差异.结果表明:①四个季节夜间热岛强度总是强于白天,而白天城市热岛并不明显.四季夜间热岛强度大小关系为冬季>秋季>春季>夏季.冬季晴天夜间热岛强度均值达到最大值1.97℃,夏季晴天夜间热岛强度均值达到最小值0.76℃.②城区以感热通量为能量支配的主要方式,郊区以潜热通量为能量支配的主要方式,城区日均形成不稳定层结时间比郊区长2.3 h.城区站点四季波文比起伏较大,冬季晴天最大为8.66,秋季晴天最小为0.95,四季波文比大小关系为冬季>春季>夏季>秋季.郊区站点四季波文比起伏较小,冬季晴天最大为1.65,秋季晴天最小为0.49.Based on the data collected by the automatic weather station and the eddy correlation system from the urban and suburban areas in Hefei from 5 May to 10 October,2013,differences in the urban and suburban areas are quantitatively analyzed from three aspects:meteorological factors,urban heat island(UHI)intensity,and surface energy balance.The result shows:①UHI in the evening is stronger than that in the daytime,but not obvious in the daytime.The order of intensity of UHI in four seasons at night is winter>autumn>spring>summer.The average value of UHI intensity at night reached the maximum of 1.97℃on clear winter nights,and the minimum of 0.76℃was reached on clear summer nights.②The sensible heat flux played a major role in urban energy budget,while the latent heat flux played a major role in suburban energy budgets.The daily average time of unstable stratification in urban sites is 2.3 h longer than that in suburban areas.The Bowen ratio of the four seasons in the urban area fluctuated greatly,reaching the maximum of 8.66 on sunny days in winter,and the minimum of 0.95 on sunny days in autumn.The order of the Bowen ratio of four seasons in the urban area is winter>spring>summer>autumn.The Bowen ratio in the suburban area had less fluctuations in four seasons with the maximum being 1.65 on sunny days in winter and the minimum being 0.49 on sunny days in autumn.
分 类 号:P422.4[天文地球—大气科学及气象学]
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