Understanding the Role of Rain-On-Snow Events in High Latitude Climates: Soil Temperature and Ecosystem Impacts

了解高纬度气候中雨雪事件的作用：土壤温度和生态系统影响

• 批准号: 0314710
• 负责人: Jaakko Putkonen
• 金额: $ 24.95万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0314710&HistoricalAwards=false
• 关键词: Understanding; Role; Rain; Snow; Events

This project will explore the influences of wintertime rainfall-over-snow events on the snow cover itself and on soil properties that affect climate. Such rain-on-snow events create ice layers in the snow which impact land surface conditions and land surface-atmosphere interactions in the Arctic region. The research will be conducted using data from an array of meteorological stations combined with atmospheric model reanalysis, and is expected to advance our understanding of the climate systems in regions representing the typical hydrology and ecology of high northern latitudes. The model used for this project is a coupled atmosphere-land surface, single-column model derived from the National Center for Atmospheric Research (NCAR) Community Climate System Model (CCSM) and modified to capture the relevant physics. The output from global climate model scenarios are to be used to determine changes in the frequency of rain-on-snow events and other relevant meteorological conditions that impact the future of land-surface systems on climate and on ungulate (hoofed animal) populations.The results of this work are expected to improve modeling capabilities in Arctic land surface processes. The P.I.s will produce a report which they will distributed to the climate modeling community and specifically share with the land-surface working group of the NCAR CCSM. The work is also expected to benefit the Arctic native people since it includes the impact of rain-on-snow events on arctic ungulate herds.

该项目将探讨冬季降雨抢断事件对雪覆盖本身以及影响气候的土壤特性的影响。这样的雨天事件在雪中产生了冰层，影响北极地区的土地表面条件和土地表面 - 大气相互作用。这项研究将使用来自气象站的数据以及大气模型重新分析的结合，并有望促进我们对代表高北纬度典型水文和生态的地区的气候系统的理解。该项目使用的模型是一个耦合的大气层表面，单列模型，该模型源自国家大气研究中心（NCAR）社区气候系统模型（CCSM），并修改以捕获相关的物理学。全球气候模型场景的输出应用于确定雨通道事件的频率和其他相关气象条件的变化，这些变化影响了土地表面系统对气候和无凝结（Hoofed Animal）种群的未来。这项工作的结果预计将在北极地面过程中提高建模能力。 P.I.S将制作一份报告，他们将分发给气候建模社区，并特别与NCAR CCSM的土地表面工作组共享。预计这项工作将使北极土著人受益，因为它包括雨天事件对北极饲养牛群的影响。