Tropical cyclone precipitation in the HighResMIP atmosphere-only experiments of the PRIMAVERA Project
Tropical cyclone precipitation in the HighResMIP atmosphere-only experiments of the PRIMAVERA Project
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DOI：
10.1007/s00382-021-05707-x
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发表时间：
2021-03
期刊：
影响因子：
4.6
通讯作者：
Wei Zhang;G. Villarini;E. Scoccimarro;M. Roberts;P. Vidale;B. Vannière;L. Caron;D. Putrasahan;C. Roberts;Retish Senan;M. Moine
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作者：
Wei Zhang;G. Villarini;E. Scoccimarro;M. Roberts;P. Vidale;B. Vannière;L. Caron;D. Putrasahan;C. Roberts;Retish Senan;M. Moine
本研究基于1979-2014年基于过程的气候模拟：高分辨率模式和欧洲气候风险评估（PRIMAVERA）项目的进展，基于仅大气耦合模式比对项目第6阶段（CMIP6）的HighResMIP运行，研究了与热带气旋（tc）相关的气候和降雨结构。我们评估了具有多种动力核和参数化方案的气候模式的空间分辨率如何影响TC降雨的表征。这些HighResMIP仅对大气运行，规定了历史海面温度和辐射强迫，可以很好地再现观测到的TC降雨气候学空间格局，高分辨率模式通常比低分辨率模式表现更好。总体而言，HighResMIP仅对大气运行也可以重现观测到的TC降雨对总量的百分比贡献，高分辨率模式的总体表现更好。在空间相关性方面，模式在海洋上对气候总TC降雨量、TC降雨比例和每TC降雨量的模拟效果优于陆地。所有HighResMIP大气模式都低估了观测到的陆地和海洋上的复合TC降雨结构，特别是在它们的低分辨率下。HighResMIP纯大气运行对降水组合的低估也得到了TC降水径向廓线的支持。总的来说，空间分辨率的提高通常会导致模式在再现观测到的TC降雨特性方面的性能得到改善。
This study examines the climatology and structure of rainfall associated with tropical cyclones (TCs) based on the atmosphere-only Coupled Model Intercomparison Project Phase 6 (CMIP6) HighResMIP runs of the PRocess-based climate sIMulation: AdVances in high resolution modelling and European climate Risk Assessment (PRIMAVERA) Project during 1979–2014. We evaluate how the spatial resolution of climate models with a variety of dynamic cores and parameterization schemes affects the representation of TC rainfall. These HighResMIP atmosphere-only runs that prescribe historical sea surface temperatures and radiative forcings can well reproduce the observed spatial pattern of TC rainfall climatology, with high-resolution models generally performing better than the low-resolution ones. Overall, the HighResMIP atmosphere-only runs can also reproduce the observed percentage contribution of TC rainfall to total amounts, with an overall better performance by the high-resolution models. The models perform better over ocean than over land in simulating climatological total TC rainfall, TC rainfall proportion and TC rainfall per TC in terms of spatial correlation. All the models in the HighResMIP atmosphere-only runs underestimate the observed composite TC rainfall structure over both land and ocean, especially in their lower resolutions. The underestimation of rainfall composites by the HighResMIP atmosphere-only runs is also supported by the radial profile of TC rainfall. Overall, the increased spatial resolution generally leads to an improved model performance in reproducing the observed TC rainfall properties.