近33年新疆阿勒泰地区积雪变化特征及其与气象因子的关系

利用阿勒泰地区7个气象观测站1981-2013年积雪初、终日期、积雪期(积雪初、终日期间日数),以及同期平均气温、平均0厘米地面温度、降水量、日照时数和平均风速资料,分析了该区积雪的变化特征及其与五个气象因子的关系。结果表明：阿勒泰地区平均初日为11月3日,终日为4月2日,平均积雪期为152d；近33年阿勒泰地区积雪初日呈上升的趋势,而终日和积雪期是呈下降趋势；除了吉木乃站的积雪初日气候倾向率是负值外,其余各站均是正值的,积雪终日的气候倾向率各站均为负值,积雪期的气候倾向率除了吉木乃站外其余均是正值；各站在积雪期内与降水量呈显著的正相关,表明降水量越多积雪持续时间越长,而且七个站均通过了显著性检验,降水因子在五个因子的对各站积雪期的影响较大；阿勒泰地区的各站积雪期与积雪初、终日期间的风速、降水量、0厘米地温、日平均气温、日照时数五个因子的相关系数中有57%的通过信度0.05的显著性检验,还有20%的通过了信度0.001的显著性检验；

Variation of snow nearly 33 years Altay region and its relationship with meteorological factors

: Altay region utilizing seven meteorological stations in 1981-2013 snow early years, the end date of the snow (snow at the beginning, the number of days during the day), and the average temperature over the same period, an average of 0 cm ground temperature, precipitation, sunshine hours and The average wind speed data analyzed variation of snow in the area and its relationship with the five meteorological factors. The results showed that: the average first day Altay region November 3, day of April 2, the average period of snow 152d; nearly 33 years Altay region snow day was beginning an upward trend, and all day long, and snow on the decline ; In addition to the early days of snow Jimunai station climatic trend rate is negative, the rest of the stations is positive, the tendency of the rate of snow all day weather stations are negative climate trend rate of addition of snow Jimunai The rest are outside the station is positive; each standing snow and rainfall during the period was a significant positive correlation, indicating that more snow precipitation longer duration, and seven stations through the significant test, precipitation factor greater impact factor of five stations in the snow; the stations of the Altai region with snow early snow, wind speed during the day, precipitation, 0 cm ground temperature, the daily average temperature, sunshine hours five factors The correlation coefficient of 57% by the reliability test of significance of 0.05, and 20% by a significant test reliability 0.001.