赤峰基准气象站两次迁址对温度的影响及订正

Temperatures affected by two relocations of Chifeng base observation station and the correction

选取经历两次迁址的赤峰国家基准气候站（以下称赤峰站）和周边3个未迁过站址的参照站1960～2012年年平均气温资料，对比分析迁址对赤峰站温度的影响，探讨订正方法。分析表明，两次迁址和城市热岛效应的共同影响使得赤峰站温度变化趋势与参照站产生较大差异。（1）赤峰站53年来升温比参照站显著；（2）赤峰站与参考站的温差存在5个不连续点；（3）在与参考站的温差曲线上，在两次迁址时间段都出现显著的不连续点；（4）热岛效应强度随时间变化呈上升趋势，具有阶段性特征。最弱的是70年代0．26℃，80年代后期到90年代初既第一次迁址前最强，达到0．75℃；第二次迁址前热岛效应强度为0．79℃，达建站以来最强；（5）热岛效应和两次迁址使得赤峰站温度年代变化趋势不一致、气候变暖突变点也不一致；（6）通过消除赤峰站热岛效应和应用参照站的温度两种订正方法，重建了迁址前的温度序列，经检验气候变化趋势与参照站一致，可队Ik务应用。

The mean annual temperature data from 1960 to 2012 of Chifeng station that had experienced two times of relocation and the reference stations （three climate observation stations located in the township that had not moved） were used to comparatively analyze the effect of relocation of Chifeng station on the temperature, and then the correction methods were explored. Analysis showed that two times of relocation and the urban heat island effect had made the Chifeng station~ temperature difference with reference stations. The mean annual temperature of Chifeng station was significantly higher than reference stations for 53 years. There had five inflection points on Cbifeng stationt~ temperature anomaly evolution curve compared with reference stations;whereas there had two non - consecutive points just in the two time of relocation ; the heat island intensity showed an upward trend over time, the weakest was 0.26℃ on 1970s, the strongest was 0.75℃ before the first relocation;heat island intensi- ty was 0.79℃, and was the strongest before the second relocation;That caused Chifeng station＇s decadal trends of temperature inconsistent, the climatic warming time and warming abrupt point inconsistent. By using the methods of eliminating Chifeng station＇s heat island effect and application reference station＇s temperature to correct the Chifeng station~ temperature, we reconstructed temperature series before relocation of the station; using the diag- nostic analysis method we tested the new temperature sequence, and the new temperature＇s climatic trend was consistent with the reference stations, and can be used for business application.