基于GIS的闽清县冬季最低气温监测

Study on Monitoring of Low-temperature in Winter Based on GIS Technology in Fujian

为减轻冬季低温对农业的影响,利用闽清县15个自动气象站最低气温观测数据和1:25万DEM数据,建立经度、纬度、海拔高度与冬季最低气温地理气候方程,对2009—2010年冬季4个月份的月最低气温进行了模拟。结果表明:利用自动气象站资料和地理因子,对冬季最低气温的模拟效果较好,达到监测要求。随着经度的增加或纬度、海拔高度的减小,月最低气温有增加趋势。经检验,模拟结果与实际情况基本相符。

In order to reduce the influence which the winter low temperature for the agriculture, the study based on the 1：250000 Digital Elevation Model （DEM） data and statistical data of the lowest temperature of 15 automatic weather stations in Fujian Province, the geographic mathematical model was established depending on the connections of factors such as the lowest temperature, latitude, longitude, altitude, and was used to simulate the fine distribution of lowest temperature in 4 months in winter from 2009 to 2010. The results showed that the lowest temperature was well simulated introduced the geographic factors and the data of the automatic weather stations. Moreover, the monitor requirements were meat. With the increase of the longitude or the decrease of the latitude, altitude, the value of the month minimum temperature simulation increased. Finally, the simulated results on low temperature matched with actual situation substantially by means of model validation.