郜倩倩,刘煜,郭增元,彭艳玉. 2022. 气候模式分辨率对气溶胶气候效应数值结果的影响[J]. 气象学报, (0):-, doi:10.11676/qxxb2022.019
气候模式分辨率对气溶胶气候效应数值结果的影响
GAO Qianqian LIU Yu GUO Zengyuan PENG Yanyu
投稿时间:2021-09-30  修订日期:2021-12-17
DOI:10.11676/qxxb2022.019
中文关键词:  模式分辨率、气溶胶、气候效应
英文关键词:Model resolution, Aerosol, Climate effect
基金项目:国家重点基础研究规划项目
作者单位邮编
郜倩倩 中国气象科学研究院 100081
刘煜 中国气象科学研究院 100081
郭增元 国家气候中心 100081
彭艳玉 中国气象科学研究院 100000
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中文摘要:
      气候模式分辨率作为影响模式模拟结果的重要因素,其对气溶胶与云相互作用的影响还尚未全面认识。[模式和方法]利用公共大气模块CAM5.3在三种分辨率(2°、1°、0.5°)下,分别采用2000年和1850年气溶胶排放情景进行试验,[目的1]检验提高分辨率是否能改进气候模式的模拟能力,[目的2]分析不同分辨率下气溶胶气候效应的异同,探索模式分辨率对气溶胶气候效应数值结果的影响。[结果]通过观测资料与模式结果对比发现,提高分辨率可以明显改进模式对总云量、云短波辐射强迫,0.5°分辨率模拟结果与观测更接近,其它变量并无明显改善。在不同分辨率下,全球平均的气溶胶气候效应较为一致,总云量、云水路径和云长波辐射强迫均增加,云短波辐射强迫加强,而云顶的云滴有效半径、地面气温和降水均减少。不同分辨率下气溶胶增加引起的光学厚度、云水路径、地面温度、云短波和长波辐射强迫的变化的纬向平均分布形势相似但大小存在差异;而降水和云量变化的纬向分布形势与大小均存在较大差异,在区域尺度上的变化还存在较大的不确定性。全球平均而言, 0.5°分辨率下气溶胶的间接辐射强迫AIF相比1°分辨率下的结果减少了2.5%,相比2°分辨率下的结果减少了6.4%。[结论]提高模式分辨率可以部分改进模式模拟能力,同时,气溶胶的间接效应随着模式分辨率的提高而减弱。但气溶胶引起的云量、降水的变化在不同分辨率下差异较大,存在较大不确定性。
英文摘要:
      As one of the important factors affecting the model simulation results, the effect of climate model horizontal resolution on aerosol-cloud interactions has not been fully understood. In this study, the Community Atmosphere Model Version 5.3 is run at three horizontal grid spacing of 2°, 1°, 0.5°, based on the 2000 and 1850 aerosol emission scenarios, in order to evaluate whether the higher horizontal resolution can improve the simulation ability of the model, further analyze the similarities and differences of aerosol climate effects. The comparison between observations and model results show that the higher-resolution model can significantly improve the simulation of total cloud cover, cloud shortwave radiative forcing, the 0.5° resolution simulation results are closer to the observations, but other variables have not been significantly improved. The global average aerosol climate effects under different model resolutions are relatively consistent. The total cloud cover, cloud liquid water path, and cloud long-wave radiative forcing all appear to increase, and cloud short-wave radiative forcing is enhanced while the cloud droplet effective radius at the top of cloud, surface air temperature, and precipitation all appear to reduce. At the different resolutions, the zonal mean tendencies of changes in optical thickness, cloud water path, surface temperature, cloud short-wave and long-wave radiative forcing caused by the increase of aerosols are similar, but the values are different. Furthermore, the variation of precipitation and cloud cover are quite different in the zonal mean tendencies and values and still have large uncertainties on a regional scale. On global average, the annual average of the aerosol indirect radiative forcing (AIF) in the 0.5°is reduced by 2.5% compared to the result at 1° resolution, and 6.4% compared to the result at 2° resolution. Overall, increasing resolution can partially improve the model"s simulation capabilities, and makes AIF weaken. However, the variation of precipitation and cloud cover caused by aerosols are quite different under the case of three model resolutions, and there are great uncertainties
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