Spatial and temporal patterns of temperature and Precipitation changes in the surrounding areas of Hongze Lake from 1951 to 2014

Abstract

Under global warming, in order to comprehensively explore the change characteristics of the lake's water and heat budget in time and space and its influence on lake-gas interaction, the multi-factor study was carried out. Based on the meteorological data of precipitation and temperature of 16 meteorological stations in the surrounding area of Hongze Lake in recent 64 years (1951-2014), the temperature and precipitation of 16 meteorological stations are analyzed from the characteristics of time and space by using the methods of climate tendency rate, anomaly and inverse distance weight in ArcGIS. The results show that : (1) In the past 64 years, the precipitation around Hongze Lake has changed greatly, with a decrease of −7.0837mm·(10a)-1;the temperature increased by 0.316 °C·(10a )-1, and the change trend of average temperature and average precipitation was opposite. The average temperature of many years showed an upward trend, and the temperature change from 1951 to 1961 was particularly obvious. After 1962, the temperature fluctuated around the average temperature. The temperature and precipitation in summer showed a downward trend. (2) On the whole, the temperature and precipitation showed an increasing trend from the west to east, roughly taking Hongze Lake as the dividing line. The warming and humidification in the west of Hongze Lake were slower, and the warming and humidification in the east was faster. The temperature was warming and the precipitation decreased, so the climate was warm and dry. The research results provide a reference for the establishment of a comprehensive early warning system for agricultural meteorological disasters and the local government 's response to agricultural meteorological disaster prevention and mitigation.