Baltimore Ecosystem Study LTER site, station Carroll County, MD (FIPS 24013), study of county area in units of squareKilometers 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 Baltimore Ecosystem Study LTER (BES)
contains county area measurements in squareKilometers units
and were aggregated to a yearly timescale.

EcoTrends项目由黛布拉·彼得斯博士（约拿盆地长期生态研究站点，美国农业部农业研究服务局约拿实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究站点，美国农业部林务局卢奎洛实验林）于2004年创立，旨在支持长期生态数据集的采集与分析工作。本项目为一项大型综合研究工作，核心目标是提升长期生态数据的可获取性与应用价值。目前，已有约50个州立及联邦资助的研究站点参与并为EcoTrends项目贡献数据，其中包括全部26个长期生态研究（Long-Term Ecological Research，简称LTER）站点，以及美国农业部农业研究服务局（ARS）、美国农业部林务局、美国能源部、美国地质调查局（USGS）和众多高校资助的研究站点。EcoTrends项目的数据集可通过探索性门户网站（http://www.ecotrends.info）获取。该门户网站依托交互式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（PASTA）的组成部分，持续开展的数据汇编工作通过手动与自动两种处理方式进行更新。该门户网站由约拿LTER站点与LTER网络办公室联合开发运营。以下来自巴尔的摩生态系统研究LTER（Baltimore Ecosystem Study LTER，简称BES）的数据集，包含以平方千米为单位的县域面积测量值，并已按年度时间尺度进行聚合。