Development of a cumulus parameterization scheme based on a new static stability criterion

基于新静态稳定准则的积云参数化方案的开发

• 批准号: 23540520
• 负责人: NAKAMURA Kozo
• 金额: $ 3.24万
• 依托单位: Japan Agency for Marine-Earth Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540520/
• 关键词: 静的安定性; 条件付き不安定成層; パーセル法; 積雲境界層; 雲解像モデル; 積雲対流パラメタリゼーション; LES; 数値モデル

The purpose of this work is to investigate the validity of the stability theory of a saturated air parcel in an unsaturated environment in terms of the moist adiabatic lapse rate of virtual temperature using observational data and numerical experiments data, and to develop a new parameterization scheme of cumulus convection. Observational results show a good agreement with the theory.For the numerical experiment, we consider a cumulus boundary layer maintained by the balance between the surface heat fluxes, horizontal advection, and large-scale subsidence. Even if the external forcing is fixed, there occur two balanced states. One is the state with organized convection and the other is the state with randomly distributed non-organized convection. The characteristics of the boundary layer such as vertical gradient of temperature is different between the two states. In order to investigate the stability of convection, we must consider the difference between the two states.

本文利用观测资料和数值试验资料，用湿绝热直减率检验了非饱和环境中饱和气团稳定性理论的有效性，并发展了一种新的积云对流参数化方案。 数值试验中，我们考虑了由地面热通量、水平平流和大尺度沉降之间的平衡维持的积云边界层。 即使外力固定，也会出现两种平衡状态。一种是有组织对流的状态，另一种是无组织对流随机分布的状态。 两种状态下的边界层特征如温度垂直梯度等不同。 为了研究对流的稳定性，我们必须考虑这两种状态之间的差异。

项目成果

Simulation and Verification of Tropical Deep Convective Clouds using Eddy-Permitting Regional Atmospheric Models

使用允许涡流区域大气模型模拟和验证热带深对流云

• 发表时间: 2012
• 期刊: Annual Report of the Earth Simulator Center, April 2011-March 2012
• 作者: K. Nakamura;M. Hara;A. Noda;H. Tomita;and Y. Wakazuki
• 通讯作者: and Y. Wakazuki

Simulation and Verification of Tropical Deep Convective Clouds using Eddy-Permitting Regional Atmospheric Models II

使用允许涡流区域大气模型 II 的热带深对流云模拟和验证

• 发表时间: 2013
• 期刊: Annual Report of the Earth Simulator Center, April 2012-March 2013
• 作者: Kozo Nakamura;Masayuki Hara;Akira Noda;Hirofumi Tomita;Yasutaka Wakazuki
• 通讯作者: Yasutaka Wakazuki

Simulation and Verification of Tropical Deep Convective Clouds using Eddy-Permitting Regional Atmospheric Model

利用允许涡流区域大气模型模拟和验证热带深对流云

• 发表时间: 2012
• 期刊: Annual Report of the Earth Simulator Center
• 作者: Kozo Nakamura;Masayuki Hara;Akira Noda ;Hirofumi Tomita ;Yasutaka Wakazuki
• 通讯作者: Yasutaka Wakazuki

Reconsideration of Conditional Instability -Static Stability of a Saturated Air Parcel in an Unsaturated Environment-

条件不稳定性的再考虑-非饱和环境中饱和空气块的静稳定性-

• DOI: 10.2151/jmsj.2011-506
• 发表时间: 2011
• 期刊: Journal of the Meteorological Society of Japan. Ser. II
• 作者: 谷口亨;澤田信一;Kozo Nakamura
• 通讯作者: Kozo Nakamura

仮温度減率を使った大気の静的安定性の分類についての再考

重新考虑使用伪温度递减率的大气静态稳定性分类

• 作者: 中村晃三 ,藤吉康志 ;坪木和久 ;久芳奈遠美;清水寧，新山友暁，川村真澄，澤田信一，保田英洋;中村晃三
• 通讯作者: 中村晃三