Santee Experimental Forest site, station NADP Station SC06, Santee National Wildlife Refuge, SC, study of ammonium in wet deposition in units of kilogramsPerHectare 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 Santee Experimental Forest (SAN)
contains ammonium in wet deposition measurements in kilogramsPerHectare units
and were aggregated to a monthly timescale.

EcoTrends项目由Debra Peters博士（若望盆地长期生态研究站（Jornada Basin LTER），美国农业部农业研究局若望实验牧场）与Ariel Lugo博士（卢奎洛长期生态研究站（Luquillo LTER），美国农业部林务局卢奎洛实验森林）于2004年创立，旨在支持长期生态数据集的收集与分析工作。
该项目是一项大型综合研究工作，核心目标为提升长期生态数据的可获取性与使用率。目前共有约50个由州政府及联邦政府资助的研究站点参与本项目并贡献数据，涵盖全部26个长期生态研究（Long-Term Ecological Research, LTER）站点，以及美国农业部农业研究服务局（USDA Agriculture Research Service, ARS）、美国农业部林务局、美国能源部、美国地质调查局（US Geological Survey, USGS）资助的站点与众多高校科研站点。
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获取工作。
作为长期生态研究溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，项目通过人工与自动结合的处理流程持续更新数据汇编内容。本网络门户由若望盆地LTER与LTER网络办公室合作开发。
本次提供的桑蒂实验森林（Santee Experimental Forest, SAN）数据集，包含以千克每公顷为单位的湿沉降铵盐观测数据，且已按月度时间尺度进行聚合。