Groundwater, soil moisture, light and weather data in Brownsville forest, Nassawadox, VA, 2019-2023

This dataset includes groundwater, soil moisture, weather and light data collected in eight study sites in the Brownsville forested area (VA). In particular, sites H5 and H7 characterize the high forest where healthy Pinus taeda dominate, sites L1 and L6 characterize the low forest, where barren or dead Pinus taeda are present, sites M1 and M2 characterize the medium forest, representing transition between high and low forest, transition site where dead trees and saltmarsh vegetation live together and marsh site dominated by saltmarsh vegetation. Data collection, started in January 2019, is done for VCR-LTER and CCZN (Coastal Critical Zone Network) long term projects. CTD-Diver are used to measure groundwater pressure, specific conductance and temperature. They hang from a cable in six wells, one for each study site. Water pressure is compensated using barometric pressure data collected by the weather station nearby. Water levels are georeferenced to NAVD 88. Two soil moisture sensors for each site are placed 7-10 cm and 30 cm below the ground surface to detect water content, specific conductance and temperature of the first soil layer. Two weather stations are always installed in different sites. Their position is periodically changed to cover all sites. This material is based upon work supported by the National Science Foundation under Grant No. 2012322, Collaborative Research: Network Cluster: The Coastal Critical Zone: Processes that transform landscapes and fluxes between land and sea.本数据集涵盖美国弗吉尼亚州布朗斯维尔林区（Brownsville forested area, VA）8个研究样地采集的地下水、土壤湿度、气象及光照数据。其中，H5与H7样地为高林样地，优势植被为健康火炬松（Pinus taeda）；L1与L6样地为低林样地，区域内分布有枯败或死亡的火炬松；M1与M2样地为中林样地，代表高林与低林之间的过渡带——该过渡带内枯木与盐沼植被共生，另有一处以盐沼植被为优势的沼生样地。 数据采集工作于2019年1月启动，服务于VCR-LTER与CCZN（海岸关键带网络，Coastal Critical Zone Network）两项长期研究项目。本研究采用CTD-Diver传感器测量地下水压力、比电导率与水温，该传感器悬挂于6口监测井的悬挂缆绳上，每处样地对应一口监测井。研究通过附近气象站采集的气压数据对地下水压力进行补偿，地下水位已参照北美垂直基准面88（NAVD 88）完成地理配准。 每个样地部署两台土壤湿度传感器，分别埋设于地表下7至10厘米与30厘米深度，用于检测浅层土壤的含水量、比电导率与温度。本研究共设置两台气象站，初始部署于不同样地，后续将定期调整位置以覆盖全部研究样地。 本成果基于美国国家科学基金会（National Science Foundation）编号为2012322的合作研究项目资助，项目名称为：“协作研究：网络集群：海岸关键带：塑造景观及海陆间通量的过程”（Collaborative Research: Network Cluster: The Coastal Critical Zone: Processes that transform landscapes and fluxes between land and sea）。