The effect of climate change on heating period in winter in Shenyang

Based on the annual mean air temperature data and the daily mean air temperature data of the one month before heating and after heating from 1961 to 2010 in Shenyang, the annual mean air temperature trend and mean air temperature trend of heating period were analyzed using methods of a linear trend and a degree-day. The beginning date and ending date of heating, heating duration and heating intensity were discussed. The results show that the annual mean air temperature and mean air temperature of heating are in increasing trends from 1961 to 2010, especially the former and it passes the significance test. The beginning date of heating is put off because of climate warming, and the ending date of heating is in advance. The heating duration is shortened. The climate warming makes the heating intensity decreasing.