H. J. Andrews Experimental Forest site, station NADP Station OR10, H. J. Andrews Experimental Forest, OR, study of sulfate in precipitation (volume-weighted concentration) in units of milligramsPerLiter on a monthly 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 H. J. Andrews Experimental Forest (AND)
contains sulfate in precipitation (volume-weighted concentration) measurements in milligramsPerLiter units
and were aggregated to a monthly timescale.

EcoTrends项目于2004年由黛布拉·彼得斯博士（乔纳达盆地长期生态研究站，USDA-ARS乔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站，USDA-FS卢奎洛实验林）发起创立，旨在支撑长期生态数据集的采集与分析工作。本项目属于大型综合研究计划，核心聚焦于提升长期生态数据的可访问性与使用效率。当前共有约50个由州级与联邦政府资助的研究站点参与并向EcoTrends项目贡献数据，其中包含全部26个长期生态研究（Long-Term Ecological Research, LTER）站点，以及由美国农业部农业研究局（ARS）、美国农业部林务局、美国能源部、美国地质调查局（USGS）及众多高校资助的各类站点。EcoTrends项目的数据可通过探索性网络门户（http://www.ecotrends.info）获取。该网络门户依托交互式Web应用程序，支持用户持续开展数据汇编与数据访问工作。作为LTER溯源感知综合跟踪架构（PASTA）的组成部分，持续推进的数据汇编工作通过手动与自动两种处理方式完成更新。本网络门户由乔纳达LTER站与LTER网络办公室合作共建。以下来自H. J. 安德鲁斯实验森林（AND）的数据集，包含降水硫酸盐的体积加权浓度测量数据，单位为毫克每升，且数据已聚合至月尺度。