龙门县寒冷天气统计特征及其对人体舒适度的影响

根据龙门县1962—2012年逐日气象资料,采用线性回归、滑动平均、人体舒适度指数等方法,研究了龙门县寒冷天气统计特征及其对人体舒适度的影响。结果表明,近50年来龙门寒冷天气日数呈不显著减少趋势,减少速率每10年1.9 d,但近10年寒冷天气日数呈增加趋势。寒冷天气主要出现在12—2月,占全年的86.8%。寒冷天气可分阴冷寡照型、晴空辐射型、冷空气来袭型3种类型。部分橙色寒冷天气虽然早晚气温较低,人体感觉寒冷,但中午气温较高,人体感觉舒适;而黄色寒冷天气若为阴雨寡照型时,全天气温较低,人体感觉寒冷。

Statistical Characteristics of Chilly Weather of Longmen County and Their Effect on Comfort Degree for Human Body

Based on the daily meteorological data of Longmen County from 1962 to 2012 and with the methods of linear regression,running mean and comfort degree index for human body,the effect of statistical characteristics of the local chilly weather is examined in this work on how comfortable a human body could be. The results are shown as follows. The number of days of chilly weather has been decreasing insignificantly in Longmen over the 50 years by a rate of 1. 9 d every 10 years,though it tends to increase in the past 10 years. Chilly weather is mainly observed from December to February,taking up 86. 8% of the yearly total.The chilly weather can be divided into three types of origin：（ 1） overcast sky,cold temperature and little sunshine;（ 2） radiation in fine sky and（ 3） cold air wave. Though with relatively low temperature around sunrise and sunset,some of the chilly weather（ warned with for a higher degree of coldness） can have relatively high temperature at noon and makes one comfortable,the other chilly weather（ warned with a lower degree of coldness） can have relatively low temperature all day long and makes one uncomfortably cold if it belongs to type（ 1）.