The Hydroclimatology of the Continental-US Boundary Outflow

小行星19316288 水文气候学中最重要的问题之一是了解短期气候变率与区域到大陆尺度的地表水文变率之间的联系。 我们建议研究区域尺度与大陆尺度之间的关系。 我们建议研究区域-大陆尺度水文过程和月-十年大气变化之间的关系，使用观测数据，大规模的流域预算和概念模型来测试假设的物理机制。 虽然由于数据有限，无法对整个北美进行全面研究，但与美国接壤的区域包括该大陆所包含的空间和时间变异性的一个观察良好的重要部分。 根据美国地质调查局记录的观测结果，确定了50年来美国大陆边界的每日外流量。站的 通过综合月、季和年的总量，可将储存和转移的影响降至最低。 这个新建立的数据库将与现有的跨越几十年的气候数据库一起使用。 这项研究的主要目标包括：（a）确定美国大陆外流的时空尺度;（B）研究与美国接壤的次大陆和区域水文收支;（c）确定在大气-陆地系统中这些尺度上起作用的强迫/反馈机制。 拟议的研究是一项为期两年的跨学科努力，涉及爱荷华州大学的水文研究小组和斯克里普斯海洋学研究所的气候研究小组。 拟议的研究与NRC关于水文科学机会的报告（NRC，1991年，另见Georgakakos，1992年）中规定的研究领域一致，因为它涉及大陆和区域范围的问题 水文学和大气/陆地表面相互作用。 此外，该研究与大陆能量和水循环实验（GEWEX）大陆尺度研究具有高度的相关性 国际项目（GCIP）。

19316288 Georgakakos One of the most important problems in hydroclimatology is to understand the linkage between short period climate variability and surface hydrologic variability on regional to continental scales. We propose to study the relation between regional to continental scales. We propose to study the relation between regional- continental scales hydrologic processes and monthly-decade atmospheric variations using observed data, large-scale watershed budgets and conceptual models to test hypothesized physical mechanisms. While data availability precludes a comprehensive study over all of North America, the conterminous United States domain includes a well-observed and important segment of the spatial and temporal variability contained by the continent. Fifty years of daily outflows through the boundaries of the continental United States have been determined based on observations recorded by U.S.G.S. stations. By integrating over monthly, seasonal and annual totals, effects of storage and diversion are minimized. This newly created database will be used together with existing climatic databases that span several decades. Primary goals of the study include: (a) determination of the spatio-temporal scales of the continental-United States outflow: (b) study sub-continental and regional hydrologic budgets of the conterminous United States; (c) identification of forcing/feedback mechanisms active on those scales in the atmosphere-land system. The proposed research is a two year interdisciplinary effort involving the hydrology Research group of the University of Iowa and the climate research group of the Scripps Institutional of Oceanography. The proposed research is in line with the stated research areas of the NRC report on Opportunities in the Hydrologic Sciences (NRC, 1991, see also Georgakakos, 1992), as it tackles the issues of continental and regional scale hydrology and atmosphere/land surface interaction. Also, the proposed study is hig hly relevant to the GEWEX (Continental Energy and Water Cycle Experiment) Continental-Scale International Project (GCIP).