A Career Development Plan: Nocturnal Atmospheric Exchange Over Forests

9629497森林植被对大气二氧化碳的封存是一个对生物地球化学碳循环很重要的过程。这种交换过程在数量上还没有被很好地理解，特别是对于发生在行星边界层内的夜间条件。这项研究的重点是控制生物圈和大气之间二氧化碳和其他标量夜间通量的因素。该项目将利用微气象方法检查过程一级的大气交换，其目的是推进当前量化植被冠层上碳交换的技术。这项工作是一项模拟研究，将分析加拿大安大略省北部森林生态系统内两个地点目前可用的微气象和边界层数据(即，BOREAS实验，1993年夏季)。PI还将分析将从两个计划的生态系统边界层实验中获得的微气象数据集：康涅狄格州的大山森林(GMF)(1996年4月现场运行)和康涅狄格州纽黑文的农场河流盐沼(计划于1998年进行的项目，由康涅狄格州海洋赠款计划资助)。四个试验点是根据树冠剖面(如高度、形态、植被组成)选择的。对这些地点的微气象数据进行分析的目的是增进目前对植被和大气流动之间的动态耦合以及这种耦合如何影响更大尺度的森林-大气相互作用和边界层湍流的理解。*自动柜员机-9629497

9629497 Lee Sequestering of atmospheric CO2 by forest vegetation is a process that is important to the biogeochemical carbon cycle. This exchange process is not well understood in a quantitative sense, particularly for nocturnal conditions occurring within the planetary boundary layer. The research focuses on the factors that control nocturnal fluxes of CO2 and other scalars between the biosphere and atmosphere. The project will examine atmospheric exchange at a process-level by using micrometeorological methods and it is intended to advance current techniques that quantify carbon exchange over vegetation canopies. This effort is a modeling study that will analyze currently available micrometeorological, boundary layer data for two sites located within a boreal forest ecosystem of Ontario, Canada (i.e., BOREAS experiment, summer 1993). The PI will also analyze micrometeorological data sets that will be obtained from two planned ecosystem boundary layer experiments: the Great Mountain Forest (GMF), Connecticut (site operational April 1996), and the Farm River Salt Marsh, New Haven, Connecticut (project planned 1998, funded by the Connecticut Sea Grant Program). The four experimental sites are selected on the basis of canopy profile (e.g., height, morphology, vegetation composition). Analyses of the micrometeorological data from these sites are intended to improve the present understanding of the dynamic coupling between vegetation and atmospheric flow and how this coupling affects larger scale forest-atmosphere interactions and boundary-layer turbulence. *** ATM-9629497