将干燥环境对流参数化扩展到与潮湿湍流耦合以及 GRIST 模型中的基线评估

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Xiaohan Li, Wenchao Chu, Yi Zhang, Yiming Wang
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引用次数: 0

摘要

本研究介绍了干旱环境对流方案(Tiedtke-Bechtold)与边界层潮湿湍流方案耦合的扩展。深层和浅层对流上升气流被修改为在潮湿环境中发展,云冷凝物的大尺度预算考虑了补偿下沉的影响。在浅层对流的次云层传输中引入了一个模糊层,以模拟潮湿局部湍流方案中忽略的非局部传输。长期全球模拟表明,修改后的对流和潮湿湍流改善了低云和短波云的辐射强迫。这包括层积云向积云过渡的气候学结构更加逼真,以及液态水路径偏差得到改善。对于 2021 年 6 月的中短期后报,修正后的对流与湿湍流耦合减轻了一些区域降水的过度预报。它们提高了对小雨和中雨降水的预报能力。修改后的模式仍然能够捕捉到大陆降雨的昼夜特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extending a dry‐environment convection parameterization to couple with moist turbulence and a baseline evaluation in the GRIST model
This study presents an extension of a dry‐environment convection scheme (Tiedtke–Bechtold) to couple with a boundary‐layer moist turbulence scheme. The deep and shallow convective updraught is modified to develop in a moist environment and the large‐scale budget of cloud condensate takes account of the influence of compensation subsidence. An ambiguous layer is introduced in the sub‐cloud layer transport of shallow convection to mimic the non‐local transport that is ignored in the moist local turbulence scheme. Long‐term global simulation suggests that the modified convection and moist turbulence improve low cloud and short‐wave cloud radiative forcing. This includes a more realistic climatological structure of stratocumulus‐to‐cumulus transition and ameliorated biases in liquid water path. For short to mid‐term hindcasts in June 2021, the modified convection coupled with moist turbulence mitigates some regional over‐forecasts of precipitation. They improve the forecast ability for light and moderate precipitation. The modified model still retains the capability to capture the diurnal features of continental rainfall.
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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