气象学报2017，Vol.75Issue(4)：607-617,11.DOI:10.11676/qxxb2017.040
冰晶粒子不同形状假定对辐射收支和气候的影响
摘要
Abstract
Using a cloud radiative parameterization scheme with different assumptions of ice crystal shape in the global climate model, changes in radiation and climate between the spherical ice crystal assumption and the multi-shape ice crystal assumption are discussed in detail.The results show that the influences caused by ice crystal shape assumption on ice cloud optical depth, radiative fluxes, atmospheric heating rate and temperature are obvious.Compared with the spherical ice crystal assumption, the global average ice cloud optical depth decreases by 0.28 (23%) and the decrease is most obvious in the tropical area with the absolute value up to 1.02.Little changes are found in land areas in the middle and high latitudes.Global average upward longwave radiation flux at the top of atmosphere increases by 5.52 W/m2 (2.3%).Compared with observations, the multi-shape ice crystal assumption significantly reduces the underestimation by the spherical ice crystal assumption.The multi-shape ice crystal assumption weakens the shortwave radiation heating effect but enhances the longwave radiation cooling effect in the atmosphere, and these effects are particularly significant in the tropical upper troposphere.The change in the ice crystal shape has a significant effect on temperature, and temperature in the tropical upper troposphere decreases by more than 1.5 K.In summary, the change in ice crystal shape assumption has an important influence on the simulated radiation and temperature.关键词
多形状/冰云/辐射收支/气候Key words
Multi-shape/Ice cloud/Radiation budget/Climate分类
天文与地球科学引用本文复制引用
陈琪,张华,荆现文,谢冰..冰晶粒子不同形状假定对辐射收支和气候的影响[J].气象学报,2017,75(4):607-617,11.基金项目
国家重点研发计划资助(2017YFA0603502)、国家自然基金项目(41375080)、科技部公益性行业(气象)科研专项课题(GYHY201406023). （2017YFA0603502）
