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Snowpack variability and trends at long-term stations in northern Colorado, USA

机译:美国北部科罗拉多州的长期站的积雪变异性和趋势

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The individual measurements from snowcourse stations were digitized for six stations across northern Colorado that had up to 79 years of record (1936 to 2014). These manual measurements are collected at the first of the month from February through May, with additional measurements in January and June. This dataset was used to evaluate the variability in snow depth and snow water equivalent (SWE) across a snowcourse, as well as trends in snowpack patterns across the entire period of record and over two halves of the record (up to 1975 and from 1976). Snowpack variability is correlated to depth and SWE. The snow depth variability is shown to be highly correlated with average April snow depth and day of year. Depth and SWE were found to be significantly decreasing over the entire period of record at two stations, while at another station the significant trends were an increase over the first half of the record and a decrease over the second half. Variability tended to decrease with time, when significant.
机译:Snowcours站的个人测量在科罗拉多州北部的六个站点被数字化,该网站有高达79岁的记录(1936年至2014年)。这些手动测量在2月至5月的第一个月内收集,1月和6月在额外的测量。该数据集用于评估雪地水域和雪水等当量(SWE)的可变性,以及整个记录周期的积雪模式的趋势,以及记录的两半(高达1975年和1976年) 。积雪的变异性与深度和SWE相关。雪深度变异性显示与平均4月的雪深度和一年中的平均水平高度相关性。发现深度和SWE在两个站的整个记录​​期间被发现显着下降,而另一个站在另一个站点上的重大趋势是在记录的前半部分的增加,而下半部分。当重要时,随着时间的推移,变化趋于减少。

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