The Heated Condensation Framework. Part II: Climatological Behavior of Convective Initiation and Land–Atmosphere Coupling over the Conterminous United States
The Heated Condensation Framework. Part II: Climatological Behavior of Convective Initiation and Land–Atmosphere Coupling over the Conterminous United States
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热凝结框架。第二部分：美国本土对流引发和陆地-大气耦合的气候行为。
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
J. Santanello
中科院分区：
文献类型：
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作者：
A. Tawfik;P. Dirmeyer;J. Santanello
摘要这是一项由两部分组成的研究的第二部分，介绍了加热凝结框架（HCF），该框架根据陆地与大气相互作用来量化大气的潜在对流状态。第一部分介绍了全套 HCF 变量，并将其应用于对大平原南部单个地点进行观测和模型的案例研究。第一部分表明，HCF 能够识别局部引发的对流并量化能量上有利的引发路径。在这里，HCF 适用于整个美国本土，并利用北美区域再分析 (NARR) 和观测，探索了 34 个夏季（6 月至 8 月）与当地陆地-大气耦合 (LoCo) 相关的对流起始 (CI) 的气候学。 NARR 被发现能够捕获美国大部分地区的对流阈值（浮力混合势温 θBM）和能量优势转变（能量优势势温 θadv）。
AbstractThis is Part II of a two-part study introducing the heated condensation framework (HCF), which quantifies the potential convective state of the atmosphere in terms of land–atmosphere interactions. Part I introduced the full suite of HCF variables and applied them to case studies with observations and models over a single location in the southern Great Plains. It was shown in Part I that the HCF was capable of identifying locally initiated convection and quantifying energetically favorable pathways for initiation. Here, the HCF is applied to the entire conterminous United States and the climatology of convective initiation (CI) in relation to local land–atmosphere coupling (LoCo) is explored for 34 summers (June–August) using the North American Regional Reanalysis (NARR) and observations. NARR is found to be capable of capturing the convective threshold (buoyant mixing potential temperature θBM) and energy advantage transition (energy advantage potential temperature θadv) for most of the United Sta...