Investigation of ice cloud modeling capabilities for the irregularly shaped Voronoi ice scattering models in climate simulations
Investigation of ice cloud modeling capabilities for the irregularly shaped Voronoi ice scattering models in climate simulations
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DOI：
10.5194/acp-22-4809-2022
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发表时间：
2022
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通讯作者：
Ming Li;H. Letu;Yiran Peng;H. Ishimoto;Yanluan Lin;T. Nakajima;A. Baran;Zengyuan Guo;Yonghui Lei;Jiancheng Shi
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作者：
Ming Li;H. Letu;Yiran Peng;H. Ishimoto;Yanluan Lin;T. Nakajima;A. Baran;Zengyuan Guo;Yonghui Lei;Jiancheng Shi
。天气气候模式和冰云遥感应用都需要获得有效的冰晶散射(ICS)特性和参数化方案。不规则形状的Voronoi ICS模型被认为在几个卫星项目的遥感应用中是有效的，例如Himawa-8、GCOM-C(全球变化观测任务-气候)和EarthCARE(地球云气溶胶和辐射探测器)。作为Letu等人的继续工作。(2016)，在社区集成地球系统模式(CIESM)中使用了Voronoi ICS模式的冰云光学特性参数化方案(Voronoi方案)来模拟冰云的光学和辐射特性。我们利用Voronoi模型从紫外线到红外的单次散射特性(消光因子、fi强度、单次散射反照率和不对称因子)，结合飞机测量获得的14408个颗粒尺寸分布，完成了Voronoi格式。将Voronoi方案和现有方案(Fu、Mitchell、Yi和Baum-yang05)应用于CIESM，模拟了2001-2010年10年的全球云辐射效应。对Voronoi和其他四个现有方案模拟的全球平均大气顶部云辐射强迫(TOA)与云和地球辐射能量系统能量平衡和填充(EBAF)产品进行了比较。结果表明，Voronoi方案与EBAF产品在TOA的短波和长波全球平均云辐射强迫的差异分别为1.1%和1.4%，均低于其他4种方案。特别是对于冰云多发的地区(从30◦S到30◦N)，Voronoi方案与其他四个现有方案相比，提供了与EBAF产品最接近的匹配。研究结果充分证明了Voronoi ICS模式在气候模式中模拟冰云辐射特性的有效性。
. Both weather–climate models and ice cloud remote sensing applications need to obtain effective ice crystal scattering (ICS) properties and the parameterization scheme. An irregularly shaped Voronoi ICS model has been suggested to be effective in remote sensing applications for several satellite programs, e.g., Himawari-8, GCOM-C (Global Change Observation Mission–Climate) and EarthCARE (Earth Cloud Aerosol and Radiation Explorer). As continuation work of Letu et al. (2016), an ice cloud optical property parameterization scheme (Voronoi scheme) of the Voronoi ICS model is employed in the Community Integrated Earth System Model (CIESM) to simulate the optical and radiative properties of ice clouds. We utilized the single-scattering properties (extinction efficiency, single-scattering albedo and asymmetry factor) of the Voronoi model from the ultraviolet to the infrared, combined with 14 408 particle size distributions obtained from aircraft measurements to complete the Voronoi scheme. The Voronoi scheme and existing schemes (Fu, Mitchell, Yi and Baum-yang05) are applied to the CIESM to simulate 10-year global cloud radiative effects during 2001–2010. Simulated globally averaged cloud radiative forcings at the top of the atmosphere (TOA) for Voronoi and the other four existing schemes are compared to the Clouds and the Earth’s Radiant Energy System Energy Balanced and Filled (EBAF) product. The results show that the differences in shortwave and longwave globally averaged cloud radiative forcing at the TOA between the Voronoi scheme simulations and EBAF products are 1.1 % and 1.4 %, which are lower than those of the other four schemes. Particularly for regions (from 30 ◦ S to 30 ◦ N) where ice clouds occur frequently, the Voronoi scheme provides the closest match with EBAF products compared with the other four existing schemes. The results in this study fully demonstrated the effectiveness of the Voronoi ICS model in the simulation of the radiative properties of ice clouds in the climate model.