TY - JOUR TI - Air temperature and precipitation variation trends of the Lancang river upstream from 1957 to 2011 AU - Guo Ya-Nan AU - Yang Xiao-Hua AU - Chen Xiao-Juan AU - Mei Ying AU - Di Chong-Li JN - Thermal Science PY - 2013 VL - 17 IS - 5 SP - 1383 EP - 1388 PT - Article AB - Air temperature and precipitation variation trends of the upstream of Lancang river using the time series from 1957 to 2011 are evaluated. The Mann-Kendall method is applied to study the trend and climatic jump of the air temperature and precipitation time series. It shows that the temperature has an obvious uptrend with an increase of 0.023°C per year. The annual precipitation of the upstream of Lancang river is 954.96 mm without any change, however, the precipitation is gradually increased from upstream to downstream. This paper is significant for understanding the climate change over the years, and it has practical significance for water resources allocation and management in the future.