五台山积雪变化趋势及其影响因素

Variation Trend of Snow Cover in Wutai Mountain and Its Influencing Factors

基于MODIS积雪产品与微波遥感数据,分析五台山2000—2019水文年积雪时空分布、变化趋势及与影响因素的Pearson相关性,结果表明:(1)五台山积雪期为10月至翌年4月,年内呈单峰型变化趋势,积雪集中于西北部。(2)积雪面积和积雪日数的年际变化呈显著减少趋势(p<0.05)。(3)积雪面积和积雪日数与海拔正相关,积雪面积在北坡高于南坡。(4)积雪面积与气温相关程度高于降水量,积雪面积在年内与气温和降水量日值呈显著负相关(p<0.05),在年际与气温年均值呈显著负相关(p<0.05)。

Based on MODIS snow products and microwave remote sensing data,the temporal and spatial distribution,variation trend and Pearson correlation with influencing factors of snow cover in Wutai Mountain from 2000 to 2019 were analyzed.The results show that,(1)the snow cover period of Wutai Mountain is from October to next April,showing a single peak variation trend in the year,and the snow cover is concentrated in the northwest.(2)The interannual variation of Snow Cover Area and Snow Cover Days showed a significant decreasing trend(P<0.05).(3)The Snow Cover Area and Snow Cover Days are positively correlated with altitude.The Snow Cover Area on the north slope is higher than that on the south slope.(4)The correlation between Snow Cover Area and temperature is higher than that of precipitation.The Snow Cover Area has a significant negative correlation with the daily value of temperature and precipitation within the year(P<0.05),and has a significant negative correlation with the annual average value of temperature between years(P<0.05).