SGER: Evaluation of the Simulated Global Water Cycles in the NCAR, GFDL and GISS Climate System Models

SGER：NCAR、GFDL 和 GISS 气候系统模型中模拟全球水循环的评估

• 批准号: 0451587
• 负责人: Aiguo Dai
• 金额: --
• 依托单位: University Corporation For Atmospheric Res
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-10-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0451587&HistoricalAwards=false
• 关键词: SGER; Evaluation; Simulated; Global; Water

The movement of water and associated energy within Earth's atmosphere, oceans and land, and the exchanges among these components are a major aspect of Earth's climate system. Accompanying the water cycle, there are large radiative and latent heat fluxes, and oceanic salt transports involved. Correct simulation of the global water cycle and the associated energy and other fluxes in global climate system models is an extremely challenging task, yet it is a prerequisite for these models to provide realistic simulations of current and future climates. The PI will analyze the global and large-scale water cycles in the Community Climate System Model (CCSM3), the Goddard Institute for Space Sciences (GISS) model and the Geophysical Fluid Dynamics Laboratory (GFDL) model, and compare them with available observations. He will examine the spatial and temporal (seasonal to interannual) variations in precipitation (amount, frequency, and intensity), cloudiness, oceanic evaporation, terrestrial evapotranspiration and runoff, streamflow, atmospheric and oceanic freshwater transports, tropics-extratropics water exchange, land-ocean water exchange, terrestrial water storage, as well as their variability associated with the El Nino-Southern Oscillation (ENSO) and North Atlantic Oscillation (NAO).The broader impacts of the work are that it will aid in assessing the uncertainty of the future climate change projections and will guide future model development. This is important for environmental management and decision-making activities.

地球大气层、海洋和陆地中的水和相关能量的运动以及这些组成部分之间的交换是地球气候系统的一个主要方面。伴随着水循环，有大量的辐射和潜热通量，并涉及到海洋盐的传输。在全球气候系统模式中正确模拟全球水循环以及相关的能量和其他通量是一项极具挑战性的任务，但这些模式提供当前和未来气候的现实模拟是一个先决条件。PI将分析社区气候系统模型（CCSM 3）、戈达德空间科学研究所（GISS）模型和地球物理流体动力学实验室（GFDL）模型中的全球和大尺度水循环，并将其与现有观测结果进行比较。 他将研究空间和时间（季节到年际）降水变化（数量、频率和强度）、云量、海洋蒸发、陆地蒸散和径流、径流、大气和海洋淡水输送、热带-热带外水交换、陆地-海洋水交换、陆地水储存，以及它们与厄尔尼诺-南方涛动（ENSO）和北大西洋涛动（NAO）有关的变率14.这项工作的更广泛影响是，它将有助于评估未来气候变化预测的不确定性，并将指导未来的模型开发。 这对环境管理和决策活动很重要。