深圳地区夏季气温日变化时空分布特征

Diurnal Variation Characteristics and Time-Space Distribution of Summer Temperature in Shenzhen Analyzed by High-Density Meteorological Monitoring Network

利用连续在线监测气象监测数据,统计分析深圳地区夏季气温日平均变化特征及时空分布,气温日平均变化中城市建成区地表气温的上升率和冷却率均低于城市郊区,气温日变化的水平分布直接受城市不同地表热容量差异分布、地理地形以及局地风环流等影响。深圳地区夏季的热岛现象在日最高气温和日最低气温两种情形均会出现,最低气温和最高气温时热岛强度相差2倍。地表热容量较高的城市建成区,容易产生地面气温上升的延迟效应和累积效应,导致居民的体感温度增加同时降低生活舒适度。

Diurnal variation characteristics and time-space distribution of summer surface temperature in Shenzhen was analyzed by using high-density automatic meteorological monitoring network.From the perspective of diurnal variations over time to analyze diurnal variations characteristics,it was found that rising rate and cooling rate of surface temperature in urban area was lower than the suburbs,diurnal variations distribution of surface temperature was directly influenced by heat capacity differences,geography and local wind circulation.Summer heat-island appeared in both highest temperature and lowest temperature in Shenzhen,intensity of heat-island in lowest temperature was twice than that in highest temperature.Because of high heat capacity in urban area,time delay effect of raising temperature and the cumulative effect of the surface temperature elevate body feeling temperature and reduce comfort index of resident life.