Harvard Forest site, station NWS COOP #198573, Tully Lake, MA, study of air temperature (mean maximum ) in units of celsius 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 Harvard Forest (HFR) contains air temperature (mean maximum ) measurements in celsius units and were aggregated to a yearly timescale.

EcoTrends项目于2004年由黛布拉·彼得斯博士（约尔纳达盆地长期生态研究（Long-Term Ecological Research, LTER）、美国农业部农业研究局（USDA-ARS）约尔纳达实验牧场）与阿里尔·卢戈博士（卢奎洛长期生态研究（Long-Term Ecological Research, LTER）、美国农业部林务局（USDA-FS）卢奎洛实验林）创立，旨在支持长期生态数据集的采集与分析工作。该项目是一项大型综合研究计划，致力于提升长期数据的可获取性与应用价值。
目前共有约50个由州政府与联邦政府资助的研究站点参与并为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）与众多高校资助的站点。EcoTrends项目的数据集可通过探索性网络门户（http://www.ecotrends.info）获取，该门户依托交互式网页应用，支持用户持续开展数据汇编与数据获取操作。
作为LTER溯源感知综合跟踪架构（Provenance Aware Synthesis Tracking Architecture, PASTA）的组成部分，当前持续推进的数据汇编工作通过人工与自动处理相结合的方式完成更新。该网络门户由约尔纳达LTER站点与LTER网络办公室联合打造。
以下来自哈佛森林（Harvard Forest, HFR）的数据集包含以摄氏度为单位的气温（平均最高气温）观测数据，且已被聚合至年时间尺度。