DOI: | 10.2172/1248898
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报告号: | DOE/SC-ARM--16-010
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报告题名: | ARM Support for the Plains Elevated Convection at Night (AS-PECAN) Field Campaign Report |
作者: | Turner, D. D.; Geerts, B.
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出版年: | 2016
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发表日期: | 2016-04-01
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总页数: | 20
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国家: | 美国
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语种: | 英语
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中文主题词: | 铅
; 对流
; 降水
; 边界
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主题词: | LEAD
; CONVECTION
; PRECIPITATION
; BOUNDARIES
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英文摘要: | The Plains Elevated Convection at Night (PECAN) field campaign was a large multi-agency/multi-institutional experiment that targeted nighttime convection events in the central plains of the United States in order to better understand a range of processes that lead to the initiation and upscale growth of deep convection. Both weather and climate models struggle to properly represent the timing and intensity of precipitation in the central United States in their simulations. These models must be able to represent the interactions between the nocturnal stable boundary layer (SBL), the nocturnal low-level jet (LLJ), and a reservoir of convectively available potential energy (CAPE) that frequently exists above the SBL. Furthermore, a large fraction of the nocturnal precipitation is due to the organization of mesoscale convective systems (MCSs). In particular, there were four research foci for the PECAN campaign: â˘The initiation of elevated nocturnal convection focus seeks to elucidate the mesoscaleenvironmental characteristics and processes that lead to convection initiation (CI) and provide baseline data on the early evolution of mesoscale convective clusters. â˘The dynamics and internal structure and microphysics of nocturnal MCSs focus will investigatethe transition from surface-based to elevated storm structure, the interaction of cold pools generated by MCSs with the nocturnal stable boundary layer, and how the organization and evolution of elevated convection is influenced by the SBL and the vertical profile of wind and stability above the LLJ. â˘The bores and wave-like disturbances focus seeks to advance knowledge of the initiation of boredisturbances by convection, how the vertical profile of stability and winds modulate bore structure, the role of these disturbances in the initiation, maintenance, and organization of deep convection, and their impact on the LLJ and SBL. â˘The LLJ focus seeks to understand the processes that influence the spatial and temporal evolutionof the LLJ, how it affects the SBL, and the interaction between the LLJ and atmospheric boundaries in the development of CI. |
URL: | http://www.osti.gov/scitech/servlets/purl/1248898
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Citation statistics: |
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资源类型: | 研究报告
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标识符: | http://119.78.100.158/handle/2HF3EXSE/42168
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Appears in Collections: | 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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1248898.pdf(1531KB) | 研究报告 | -- | 开放获取 | | View
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Recommended Citation: |
Turner, D. D.,Geerts, B.. ARM Support for the Plains Elevated Convection at Night (AS-PECAN) Field Campaign Report. 2016-01-01.
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