Changes in the timing of snowmelt and streamflow in Colorado: a response to recent warming

摘要: Abstract Trends in the timing of snowmelt and associated runoff Colorado were evaluated for 1978–2007 water years using regional Kendall test (RKT) on daily snow-water equivalent (SWE) data from snowpack telemetry (SNOTEL) sites streamflow headwater streams. The RKT is a robust, nonparametric that provides an increased power trend detection by grouping multiple within given geographic region. analyses indicated strong, pervasive trends timing, which have shifted toward earlier year median 2–3 weeks over 29-yr study period. In contrast, relatively few statistically significant detected simple linear regression. also November–May air temperatures 0.9°C decade−1, while 1 April SWE maximum declined 4.1 3.6 cm respectively. Multiple regression models created, monthly temper...