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

与东北太平洋大气河流相关的水分收支和海气相互作用：观测和气候模型模拟

基本信息

批准号：
1347132
负责人：
Toshiaki Shinoda
金额：
$ 51.35万
依托单位：
Texas A&M University Corpus Christi
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-05-01 至 2018-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1347132&HistoricalAwards=false
关键词：
Moisture Budget Air Sea Interaction

项目摘要

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.

该项目的主要目的是评估东北太平洋大气河（ARS）的结构和机制及其对全球气候模型模拟的美国天气的影响，并了解导致模拟系统错误的物理过程。将对卫星观测和重新分析产物进行分析，包括计算复合海面温度，空气通量和与AR相关的水分预算。还将研究对低频变异性的影响，例如El Nino Southern振荡和Madden Julian振荡对ARS的影响。全球气候模型模拟的比较，包括对AR模拟的评估以及双重热带收敛区（ITCZ）问题对通过AR活动进行的美国西海岸降水的影响。该研究将包括使用规定的海面温度（SST）进行大气耦合模型实验，其中包括与双重（ITCZ）问题相关的错误的SST场。最终，将检查与可能影响SST和空气海水通量使用海洋耦合建模实验的AR相关的上海洋过程。这项研究将洞悉ARS，这些ARS是向美国西部降水的重要方式。因此，对ARS的了解增强具有重要的社会影响和利益。