关键词: 绝对湿度, 时空, 地形, 变化趋势

Abstract: [Objective] The aim of the study was to explore the variations of absolute humidity in Guizhou Province. [Method] Based on the weather observation data from 1960 to 2013, the temporal and spatial variations of absolute humidity and its relationship with precipitation in Guizhou province were analyzed using the method of absolute humidity calculation. [Results] The absolute humidity declined in Guizhou province over the period. Absolute humidity was maximum in summer, followed by spring and autumn, and was minimal in winter. Absolute humidity in the east and south parts of study area were higher than the west part. Absolute humidity was higher in basin, hill, low and moderate mountains than in the plateau. There were differences in each landform for absolute humidity among different seasons. Absolute humidity fluctuated with the increase of slope but declined with the increase of elevation. A positive correlation between absolute humidity and precipitation was found. There were consistencies in spatial pattern, proportion of season and topography between absolute humidity and precipitation. [Conclusion] Spatial and temporal variations of precipitation are dominant factors affecting variation of absolute humidity in Guizhou province.

Key words: absolute humidity, spatial and temporal, terrain, change trend