Field Measurements and Preliminary Simulation of Atmospheric Boundary Layer Evolution in EPIC2001

EPIC2001大气边界层演化的现场测量和初步模拟

• 批准号: 0082391
• 负责人: Christopher Bretherton
• 金额: $ 4.37万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0082391&HistoricalAwards=false
• 关键词: Field; Measurements; Preliminary; Simulation; Atmospheric

EPIC (Eastern Pacific Investigation of Climate processes in the coupled ocean-atmosphere system) is an activity of the US CLIVAR Program. EPIC 2001 consists of four components focussing on (i) intertropical convergence zone/warm pool phenomena; (ii) cross-equatorial inflow into the intertropical convergence zone; (iii) upper ocean structure and mixing and (iv) an exploratory study of boundary layer cloud properties in the southeasterly tradewind regime. The field phase of EPIC 2001 is scheduled for a 6-week period during the interval Sept 1 to Oct 15, 2001. In addition to the eight awards made by ATM, this collaborative research has awards made by NSF/OCE and NOAA/OGP.During the field phase, the PI will add special sensors to an existing buoy array to collect atmospheric pressure data at a temporal resolution of 10 minutes. He also will conduct preliminary large-eddy simulations of the quasi-lagrangian evolution of the planetary boundary layer as it is advected across the equatorial cold tongue and into the ITCZ. A combination of in-situ soundings from past studies and September climatology from the NCEP reanalysis will be used to initialize and force these simulations. The work is important because it will improve understanding and modeling of climate variability over the eastern tropical Pacific.

EPIC（Eastern Pacific Investigation of Climate Processes in the Coupled Ocean-Atmospheric System）是美国气候变化研究计划（CLIVAR Program）的一项活动。EPIC 2001由四个部分组成，重点是（i）热带辐合区/暖池现象;（ii）进入热带辐合区的越赤道气流;（iii）海洋上层结构和混合;以及（iv）东南信风区边界层云特性的探索性研究。EPIC 2001的实地调查阶段定于2001年9月1日至10月15日期间进行，为期6周。除了ATM的八个奖项外，这项合作研究还获得了NSF/OCE和NOAA/OGP的奖项。在现场阶段，PI将在现有的浮标阵列上添加特殊的传感器，以10分钟的时间分辨率收集大气压力数据。他还将进行初步的大涡模拟的准拉格朗日演变的行星边界层，因为它是平流通过赤道冷舌，并进入ITCZ。将使用过去研究的原位探测和NCEP再分析的9月气候学组合来初始化和强制这些模拟。这项工作很重要，因为它将改善对热带太平洋东部气候变化的理解和建模。