项目名称: 四流累加辐射传输理论研究及其在气候模式中的应用
项目编号: No.41305004
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 张峰
作者单位: 南京信息工程大学
项目金额: 25万元
中文摘要: 在气候模式中,辐射过程的精确计算非常重要,它将在很大程度上影响气候模拟和预测的结果。二流累加辐射传输算法已广泛应用于气候模式,但该算法存在较大的误差。例如对云的加热率的计算误差高达12%,这无疑增加了气候模拟中云辐射相互作用的不确定性。由于理论上的复杂性,迄今为止尚未建立四流累加辐射传输理论。本项目拟通过理论创新,建立四流累加辐射传输理论,形成一套高效、准确的,具有自主知识产权的四流累加辐射传输算法,并将其应用于气候模式中来减少辐射通量计算的不确定性。
中文关键词: 二流近似;四流近似;累加法;气候模式;云
英文摘要: In climate model, radiative transfer is a key issue, which largely affects the result of climate modeling and prediction. Two-stream adding approximations are widely used for radiative transfer parameterizations in climate model. However, there are large errors of two-stream adding approximations. For example, the errors of cloud heating are as large as 12%, which undoubtedly leads to many uncertainties for cloud-radiation interaction in climate simulation. The project intends to eventually develop four-stream adding theory in radiative transfer field, and eventually propose an efficient and accurate four-stream adding method in radiative transfer parameterizaion, which has independent intellectual property rights. In addition, it will be used to reduce the uncertainties for the calculation of radiative fluxes in climate model.
英文关键词: two-stream method;four-stream method;adding method;cliamte model;cloud