Moisture Budget and Air-Sea Interaction Associated with Atmospheric Rivers in the Northeast Pacific: Observations and Climate Model Simulations

该项目的主要目标是评估东北太平洋大气河流（ARs）的结构和机制及其对全球气候模式模拟的美国天气的影响，并了解造成模拟系统误差的物理过程。将对卫星观测和再分析产品进行分析，包括计算与AR相关的综合海表温度、海气通量和湿度收支。还将研究厄尔尼诺南方涛动和马登朱利安涛动等低频变率对AR的影响。将进行全球气候模式模拟的相互比较，包括AR模拟的评估和双重热带辐合带（ITCZ）问题对美国西海岸沿着降水的影响。该研究将包括进行大气耦合模式实验与规定的海表温度（SST），其中包括错误的SST场与双重（ITCZ）的问题。最后，上层海洋过程与ARs，可能会影响SST和海气通量的水分使用海洋耦合modelingexperiments.This研究将揭示ARs是一个重要的模式，提供降水到美国西部的见解。 因此，加强对AR的了解具有重要的社会影响和益处。

The primary goal of this project is to evaluate the structure and mechanism of atmospheric rivers (ARs) in the northeast Pacific and their impacts on U.S. weather simulated by global climate models, and understand the physical processes responsible for the systematic errors in the simulations. An analysis of satellite observations and reanalysis products including computation of composite sea surface temperature, air-sea fluxes and moisture budget associated with ARs will be undertaken. An examination of the impact of low frequency variability such as El Nino Southern Oscillation and Madden Julian Oscillation on ARs will also be investigated. An intercomparison of global climate model simulation, including the evaluation of AR simulations and the impact of the double Inter Tropical Convergence Zone (ITCZ) problem on precipitation along the U.S. West Coast through AR activity will be performed. The research will include conducting atmospheric coupled model experiments with prescribed sea surface temperatures (SST), which include the erroneous SST field associated with the double (ITCZ) problem. Finally upper ocean processes associated with ARs that could influence SST and air-sea fluxes of moisture using ocean coupled modeling experiments will be examined.This research will shed insights into ARs that are an important mode of providing precipitation to the western US. Enhanced understanding of ARs thus has important societal impacts and benefits.