Collaborative Research: Snow, Weather and Shrubs: Winter Pathways of Change in the Arctic

摘要 电话：0732 - 0733 - 0733 阿拉斯加大学，奥尔森·克雷尔·斯图姆 该项目探讨了积雪在北极系统中的作用，特别是关键气象事件如何产生北极积雪特征，以及这些积雪特征如何被灌木的持雪能力所改变。 通过了解这两个过程，一个是区域性的，一个是地方性的，PI希望将积雪与一般大气环流和大尺度气候联系起来，但仍然了解其对北极景观和生态系统的影响。 该研究计划将结合联合收割机的实地观察和基于物理的数值模拟做两个具体的任务：1）理解，测量，并预测积雪的深度分布在一个范围内的尺度，和2）理解，测量，并预测在相同的尺度积雪的物理性质的变化。 这些测量将使PI能够建立雪特性和天气之间的关系，调查雪和灌木的相互作用，并测试模型。 这些预测将需要开发和整合降雪分布和大气模型，然后再根据测量结果进行测试。 这些模型随后可用于研究北极如何应对气候变化。

ABSTRACT OPP-9732077, 9732733 STURM, OLSSON CRREL, UNIV. ALASKA This project addresses the role of snow cover in the Arctic system, particularly on how Arctic snow characteristics arise from key meteorological events, and how these snow characteristics are modified by the snow-holding capacity of shrubs. By understanding these two processes, one regional, one local, the PIs expect to link snow cover to the general atmospheric circulation and large scale climate, yet still understand its impact on the arctic landscape and ecosystem at the local scale. The research program will combine field observations and physically-based numerical modeling to do two specific tasks: 1) understand, measure, and predict the depth distribution of the snow cover at a range of scales, and 2) understand, measure, and predit the variation in physical properties of the snow pack at the same scales. The measurements will allow the PIs to establish relationships between snow properties and weather, to investigate the interaction of snow and shrubs, and to test models. The predictions will require development and integration of snow distribution and atmospheric models, which in turn will be tested against measurements. These models can be used subsequently to investigate how the Arctic might respond to changes in climate.