Mid-Oceanic Wintertime Surface Fluxes and Atmospheric Boundary Layer Structure: Relationship to Cyclone Development and Evolution

冬季大洋中部地表通量和大气边界层结构：与气旋发展和演化的关系

• 批准号: 9727054
• 负责人: Ola P Persson
• 金额: $ 19.27万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727054&HistoricalAwards=false
• 关键词: Mid; Oceanic; Wintertime; Surface; Fluxes

9727054Persson Fluxes of heat and momentum from the oceanÆs surface to the atmosphere are known to be important to the development of a variety of meteorological phenomenon. Despite the importance of this problem, little actual data has been collected of surface fluxes under high wind conditions (15 m/s). This research project will utilize data collected during the Fronts and Atlantic Storm Tracks Experiment (FASTEX) to document the relationship between mid-ocean surface fluxes and boundary layer structure and the structure and evolution of the mid-oceanic extratropical cyclones. FASTEX is an international research field program whose objective is to understand the mid-oceanic development of extratropical cyclones. Its field phase was conducted in January-February, 1997. This research will focus on ship-based surface-flux measurements collected in a high wind-speed marine environment, the associated sea state measurements, and the quasi-continuous measurements of the mid-oceanic boundary-layer structure. It is unknown to what extent present flux and boundary layer parameterizations represent these environmental conditions. Despite the significant fluxes likely to be present under these conditions, very few such measurements have been obtained previously. More than 130 hours of data were collected during FASTEX by the RV Knorr under these conditions, representing a multi-fold increase in the amount of data available in this wind speed range. The measurements will be used for the validation/modification of current marine flux and planetary boundary layer parameterization schemes used in forecast models. Because the FASTEX flux and boundary layer measurements were obtained within and in coordination with a larger field program with extensive downwind mesoscale validation data, these measurements will also be able to provide a clear demonstration of their impact on marine extratropical cyclone development and forecasting. ***

9727054Persson 众所周知，从海洋表面到大气的热量和动量通量对于各种气象现象的发展非常重要，尽管这个问题很重要，但在大风条件下收集的表面通量的实际数据却很少（15）。 m/s）。该研究项目将利用锋面和大西洋风暴路径实验（FASTEX）期间收集的数据来记录洋中表面通量和边界层结构以及风暴的结构和演化之间的关系。 FASTEX 是一项国际研究实地计划，其目的是了解洋中温带气旋的发展情况，其实地阶段于 1997 年 1 月至 2 月进行。这项研究将重点关注船基表面通量。在高风速海洋环境中收集的测量值、相关的海况测量值以及大洋中部边界层结构的准连续测量值目前尚不清楚。尽管在这些条件下可能存在显着的通量，但 RV Knorr 在 FASTEX 期间在这些条件下收集了超过 130 小时的数据，代表了多种情况。 - 此风速范围内的可用数据量增加了一倍，这些测量结果将用于验证/修改预测模型中使用的当前海洋通量和行星边界层参数化方案，因为获得了 FASTEX 通量和边界层测量结果。之内和之内通过与具有顺风中尺度验证数据的更大的实地计划相协调，这些测量还将能够清楚地展示其对海洋温带气旋发展和广泛预报的影响***。