Ecological Survey of Soil Probe Depth, Plant Functional Type (PFT) Coverage, and Vegetation PFT Height around an Eddy Covariance Tower near Resolute, Nunavut (NU) (July 2025)

An ecological survey was conducted July 23 - 28th, 2025 to characterize the landscape around an eddy covariance tower site located near Resolute Bay, NU (74.7279, -94.8985). The tower was installed in 2024 by Woodwell Climate Research Center and is now operated by Woodwell as part of the Permafrost Pathways Arctic Carbon Monitoring program. All eddy covariance tower measurements will be made available on the Ameriflux website (AMF site ID: CA-RSB). The site is described as polar desert, located on a gentle slope underlain by rocks and gravel with some sparse grasses, forbs, and mosses. Sampling plots were established every 10 - 20 meters (m) along 100 m transects extending north, east, south, and west from the tower. Surveys included soil probe depth (attempted thaw depth measurements but the landscape is underlain by rocks and gravel) and vegetation surveys of 50 centimeter (cm) x 50 cm plots to determine PFT coverage and PFT height. Photos of vegetation plots included.2025年7月23日至28日开展了一项生态调查，旨在表征位于努纳武特地区Resolute Bay（74.7279，-94.8985）附近的涡度协方差塔（eddy covariance tower）站点周边的景观特征。该塔于2024年由伍德韦尔气候研究中心（Woodwell Climate Research Center）架设，目前由该中心作为「多年冻土路径北极碳监测计划（Permafrost Pathways Arctic Carbon Monitoring program）」的组成部分开展运营。所有涡度协方差塔的观测数据均将发布于美洲通量网（Ameriflux）平台，其AMF站点编号为CA-RSB。该站点被归类为极地荒漠（polar desert），坐落于一处缓坡之上，地下以岩石和砾石为基质，伴生有少量稀疏草本植物、非禾本草本植物及苔藓。研究人员沿从该塔向北、东、南、西四个方向延伸的100米样带，以10至20米的间隔设置采样样方。本次调查内容包括土壤探针深度测量（曾尝试开展解冻深度测量，但该区域地下以岩石和砾石为基底，未获取到有效测定数据），以及针对50厘米×50厘米样方的植被调查，以确定植物功能型（Plant Functional Type, PFT）的覆盖度与高度。所有植被样方均拍摄了对应照片。