Hubbard Brook site, station NADP Station NH02, Hubbard Brook, NH, study of chloride in precipitation (volume-weighted concentration) in units of milligramsPerLiter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains chloride in precipitation (volume-weighted concentration) measurements in milligramsPerLiter units and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约尔纳达盆地长期生态研究站点（Long-Term Ecological Research, LTER），美国农业部农业研究局（USDA-ARS）约尔纳达试验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站点（Long-Term Ecological Research, LTER），美国农业部林业局（USDA-FS）卢奎洛试验林）于2004年创立，旨在支持长期生态数据集的采集与分析工作。该项目为一项大型综合研究项目，致力于提升长期生态数据的可获取性与应用效率。目前已有约50个州级及联邦资助的研究站点参与EcoTrends项目并贡献数据，其中涵盖全部26个隶属于长期生态研究网络（Long-Term Ecological Research, LTER）的站点，以及由美国农业部农业研究局（ARS）、美国农业部林业局、美国能源部、美国地质调查局（United States Geological Survey, USGS）及多所高校资助的站点。EcoTrends项目的数据集可通过探索性网络门户（http://www.ecotrends.info）获取，该门户依托交互式Web应用程序，支持用户持续进行数据整合与访问。作为长期生态研究网络溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，日常数据整合工作通过手动与自动两种处理模式进行更新。本网络门户由约尔纳达LTER与LTER网络办公室联合开发。本次提供的哈伯德布鲁克（Hubbard Brook, HBR）数据集包含降水氯化物的体积加权浓度监测数据，单位为毫克每升（mg/L），且已聚合至年际时间尺度。