Upper Ocean Processes under the Stratocumulus Cloud Deck in the Southeast Pacific

东南太平洋层积云层下的上层海洋过程

• 批准号: 0453046
• 负责人: Toshiaki Shinoda
• 金额: $ 26.18万
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-03-15 至 2009-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0453046&HistoricalAwards=false
• 关键词: Upper; Ocean; Processes; under; Stratocumulus

ABSTRACTOCE-0453046The heat budget of the upper ocean in the southeast Pacific will be studied using ocean general circulation model (OGCM) experiments The primary goal is to improve the understanding of upper ocean processes that control sea surface temperature variability in the stratocumulus cloud deck region, which may play an important role in formation and maintenance of marine boundary layer clouds. The data collected during recent field observations will be utilized to create surface forcing fields to integrate the OGCM and to validate the model performance. Gridded surface flux data sets will be created to force the OGCM based on a variety of recent satellite measurements. The flux estimates will then be compared with those derived from in-situ observations including the surface meteorological data from the IMET buoy at 20.S, 85.W and the intensive field measurements in the stratocumulus deck region conducted during the fall of 2001. Also, the performance of the OGCM will be evaluated based on the comparison with in-situ data of the upper ocean and satellite observations. Mean and variability of upper ocean heat budget will be calculated from the model output, and physical processes responsible for balancing surface heat fluxes will be examined. A particular emphasis is given to the role of Rossby waves, atmospheric subseasonal variability, and penetrative solar radiation in seasonal to interannual variations of upper ocean heat balance. The analysis of the model output in the entire stratocumulus deck region will also elucidate how accurately large-scale upper ocean variability in this region is represented by mooring observations at a particular point.Broader impacts:Proper representation of air-sea coupled processes in the stratocumulus deck region in global climate models is one of the major challenges for their further improvement. The proposed research will improve understanding and modeling of these processes, leading to better climate simulations and associated societal benefits. The project will also fund a postdoctoral scientist for participating in interdisciplinary research.

利用海洋环流模式（OGCM）试验研究东南太平洋上层海洋的热收支。主要目的是提高对控制层积云甲板区域海表温度变化的上层海洋过程的认识，层积云甲板区域可能在海洋边界层云的形成和维持中起重要作用。在最近的实地观测收集的数据将被用来创建表面强迫场，整合OGCM和验证模式的性能。将建立网格化的表面通量数据集，以根据最近的各种卫星测量结果推动OGCM。然后将通量估计值与现场观测结果进行比较，包括20.S，85.W处IMET浮标的地面气象数据和2001年秋季在层积云甲板区域进行的密集实地测量。此外，OGCM的性能进行评估的基础上进行比较，与现场数据的上层海洋和卫星观测。将根据模式输出计算上层海洋热量收支的平均值和变率，并将审查平衡表面热通量的物理过程。特别强调的是Rossby波的作用，大气亚季节变化，穿透太阳辐射的季节到年际变化的上层海洋热平衡。在整个层积云甲板区域的模式输出的分析也将阐明如何准确地在这一地区的大规模上层海洋的变化是由系泊观测在一个特定的point.broader影响：适当的表示在全球气候模式的层积云甲板区域的海气耦合过程是其进一步改进的主要挑战之一。拟议的研究将提高对这些过程的理解和建模，从而更好地模拟气候和相关的社会效益。该项目还将资助一名博士后科学家参与跨学科研究。