Eddy Flux Measurements, Fen Station, Imnavait Creek, Alaska - 2017

In contribution to the Arctic Observing Network, the researchers have established two observatories of landscape-level carbon, water and energy balances at Imnaviat Creek, Alaska and at Pleistocene Park near Cherskii, Russia.  These will form part of a network of obervatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data  points as part of the International Polar Year.  This particular part of the project focuses on simultaneous measurements of carbon, water and energy fluxes of the terrestrial landscape at hourly, daily, seasonal and multi-year time scales.  These are the major regulatory drivers of the Arctic climate system and form key linkages and feedbacks between the land surface, the atmosphere and the oceans.  We will provide a comprehensive description of the state of the regional Arctic system with respect to these variables, its overall regulation and controlling features and its interation with the global system.
In support of these objectives, a 3m eddy covariance station was established on Imnaviat Creek, Alaska.  This station has been continuoulsy monitoring carbon dioxide, water vapor, energy fluxes and various micrometeorological variables.

为支撑北极观测网络（Arctic Observing Network）的建设，研究团队分别在阿拉斯加州的伊姆纳维阿特溪（Imnaviat Creek）以及俄罗斯切尔斯基（Cherskii）附近的更新世公园（Pleistocene Park）搭建了两处针对景观尺度碳、水与能量平衡的观测站。这些观测站将与瑞典阿比斯库（Abisko）、格陵兰的扎肯堡（Zackenburg）以及加拿大高北极地区（Canadian High Arctic）的一处观测站点共同组成观测网络，作为国际极地年（International Polar Year）计划的一部分，进一步补充观测数据点位。本项目的该专项模块聚焦于在小时、日、季节及多年时间尺度下，同步开展陆地景观的碳、水与能量通量观测。上述通量是北极气候系统的核心调控驱动因子，同时也是连接陆地表面、大气与海洋的关键纽带与反馈环路。我们将针对上述变量，全面阐述北极区域系统的运行状态、整体调控机制与主控特征，以及其与全球系统的相互作用过程。
为支撑上述研究目标，研究团队在阿拉斯加州的伊姆纳维阿特溪搭建了一座高度为3米的涡度协方差（eddy covariance）观测站。该观测站已持续监测二氧化碳、水汽、能量通量以及各类微气象变量。