Temporal Variation of Hydrology in the Alaskan Arctic

本项目是对阿拉斯加北部库帕鲁克河流域水文研究的延续和扩展。先前的研究结果表明，北极排水网络响应气候变化的变化可能导致影响苔原生态系统的生物地球化学变化。响应气候变暖的水文过程的缓慢变化和年际变率需要一个长期项目来阐明过去十年的气候/水文过程和时间趋势，在此期间有证据表明空气和土壤温度变暖。野外工作、卫星图像分析和建模的结合将用于检查导致网络几何形状、土壤湿度、融雪和其他影响苔原生态系统养分可用性的因素的变化。这项研究是库帕鲁克流域控制冻土带生态的气候、土壤和生物过程的长期小组研究的组成部分，特别是对气候变暖的生态反应。

ABSTRACTOPP-9814984KANE, DOUGLASUNIVERSITY OF ALASKA This project is a continuation and expansion of a hydrology study of the Kuparuk River watershed in northern Alaska. Previous results show that changes in Arctic drainage networks in response to climate change may lead to biogeochemical changes affecting tundra ecosystems. The slow change and interannual variability of the hydrologic processes in response to climate warming requires a long-term project to elucidate climate/hydrology process and temporal trends during the past decade during which there is evidence warming air and soil temperatures. A combination of field work, analysis of satellite imagery, and modeling will be used to examine the factors leading to changes in network geometry, soil moisture, snow melt, and other factors that affect nutrient availability in the tundra ecosystem. The study is an integral component of a long-term, group study of climate, soil, and biologic processes controlling tundra ecology in the Kuparuk watershed, particularly the ecological response to a climate warming.