Eddy Flux Measurements, Fen Station, Imnavait Creek, Alaska - 2013

In contribution to the Arctic Observing Network (AON), 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.

为支持北极观测网络（Arctic Observing Network, AON）建设，研究人员分别在阿拉斯加州伊姆纳维阿特溪（Imnaviat Creek）与俄罗斯切尔斯基附近的更新世公园（Pleistocene Park）设立了两处景观尺度碳、水与能量平衡观测站。这些观测站将与瑞典阿比斯库（Abisko）、格陵兰扎肯伯格（Zackenburg）以及加拿大高北极地区的一处观测点共同组成观测网络，作为国际极地年（International Polar Year）项目的组成部分，提供更多观测数据点位。本项目的该研究分支聚焦于在小时、日、季节及多年时间尺度上，同步监测陆地景观的碳、水和能量通量。上述通量是北极气候系统的核心调控驱动因子，亦是连接陆地表面、大气与海洋的关键纽带与反馈机制。我们将围绕上述变量，全面阐述北极区域系统的运行状态、整体调控机制与控制特征，以及其与全球系统的相互作用。为达成上述目标，研究人员在阿拉斯加伊姆纳维阿特溪设立了一座3米高的涡度协方差（eddy covariance）观测站，该站点已持续监测二氧化碳、水汽、能量通量及各类微气象变量。