SMAPVEX 19-22 Millbrook Teros Tree Moisture Data

This project was initiated in 2019 and completed in 2022. For this campaign, sites were based in the Millbrook NY area, approximately centered at Cary Institute of Ecosystem Studies and in Massachusetts approximately centered at Harvard Forest. A third site for part of the campaign was centered at a Boreal Ecosystem Research and Monitoring Sites (BERMS) in Saskatchewan. Each site had approximately 25 sub-sites located within a 30x30 km grid that coincided with the path of the SMAP satellite. At each sub-site, stations were installed to collect soil moisture, soil temperature, air temperature and canopy photo data. Each station had 3 soil moisture and temperature sensors placed vertically, at 5 cm below surface and 5 cm below mineral soil. Also, each station had an air temperature sensor and an upward facing camera for phenology. In addition to these stations, at six sites, Teros water content sensors were installed in trees and at 4 sites sapflow sensors were placed in trees. During April and August 2022, vegetation and intensive manual measurements were made at each of the 25 sites. In addition, several remote sensing datasets were collected. Data provided in these datasets include data from the Teros water content sensors.

本项目于2019年启动，2022年完成。本次野外科考活动共设三个主站点：一处位于美国纽约州米尔布鲁克（Millbrook NY）地区，核心区域大致为卡里生态系统研究所（Cary Institute of Ecosystem Studies）；另一处位于马萨诸塞州，以哈佛森林（Harvard Forest）为核心站点；第三处临时主站点坐落于萨斯喀彻温省的北方生态系统研究与监测站点（Boreal Ecosystem Research and Monitoring Sites, BERMS）。每个主站点所辖范围内均设有一块30×30公里的观测网格，该网格与土壤湿度主动被动卫星（Soil Moisture Active Passive satellite, SMAP）的过境路径相重合，网格内各部署有约25个子站点。每个子站点均安装了观测站，用于采集土壤湿度、土壤温度、空气温度及冠层影像数据。每套观测站配备3套垂直布设的土壤温湿度传感器，分别安装于地表下5 cm与矿质土层下5 cm处；同时配有空气温度传感器与一台朝上的物候观测相机。除上述常规观测站外，另有6个子站点的树木上安装了Teros水分含量传感器（Teros water content sensors），另有4个子站点的树木上布设了液流传感器。2022年4月与8月期间，研究人员在全部25个子站点开展了植被调查与精细化人工观测。此外，本次研究还收集了多套遥感数据集。本次公开的数据集包含上述Teros水分含量传感器的观测数据。