Arctic Observing Networks: Collaborative Research: Sustaining and amplifying the ITEX AON through automation and increased interdisciplinarity of observations

国际冻原实验(ITEX)成立于1990年，目的是测试气温升高对冻土带植物物候、生长、物种组成和生态系统功能的影响。自2007年以来，ITEX-北极观测网(ITEX-AON)在阿拉斯加和格陵兰岛五个地点的纬度横断面上继续并扩大了ITEX方案，收集了专门为满足北极环境变化研究(SEARE)执行报告中概述的当前需求而设计的核心ITEX数据。这项工作的目标是保持阿拉斯加和格陵兰岛ITEX-Aon的时间关键数据集的连续性。核心数据集包括长期人工观测的物候、植被结构和组成、生态系统功能以及长期的ITEX控制区和试验性变暖地块的地表属性，1平方公里ARCS格网上的植被地块的重复测量，以及格陵兰的多因素升温-水分试验。通过在小尺度上同时测量多种表面性质，可以检测到以前没有认识到的关系，例如，在密集样带的苔藓为主区域，高反照率与更高的温度有关。必须继续进行这些测量，因为越来越多的证据表明，前几个生长季节的结转效应对当前和未来的反应至关重要，而且系统的内在变异性使得无法在几年的基础上确定系统的反应。该项目的数据可在ACADIS网站上免费获得。该项目将继续开展在最初阶段建立的广泛的外联活动，包括费尔柴尔德热带植物园(FTBG)与格拉斯哥州立大学地区数学和科学中心以及迈阿密、安克雷奇、大急流和埃尔帕索的学校系统之间的密切关系。

The International Tundra Experiment (ITEX) was chartered in 1990 to test the effects of increased temperature on tundra plant phenology, growth, species composition and ecosystem function. Since 2007, the ITEX-Arctic Observatory Network (ITEX-AON) has continued and expanded on the ITEX program across a latitudinal transect of five sites in Alaska and Greenland, collecting core ITEX data specifically designed to address the current needs outlined in the Study of Environmental Arctic Change (SEARCH) Implementation Report. The goal of this effort is to maintain the continuity of the temporally-critical datasets of the ITEX-AON in Alaska and Greenland. Core datasets include the long-term manual observations of phenology, vegetation structure and composition, ecosystem function, and surface properties on the long-term ITEX control and experimental warming plots, repeat measurement of the vegetation plots on the 1km2 ARCSS grids, and a multifactor warming-moisture experiment in Greenland. The simultaneous measurement of multiple surface properties at the small scale has allowed detection of relationships not previously recognized, e.g., in moss-dominated areas of the intensive transects, higher albedo is linked to higher temperatures. Continuation of these measurements is imperative because increasing evidence points towards the critical importance of carry-over effects of the previous growing seasons on current and future responses and the inherent variability in the system precluded determination of the system response on the basis of a few years. Data from this project are freely available on the ACADIS website. The project will continue extensive outreach activities established in the initial phase, including strong relationships between the Fairchild Tropical Botanic Garden (FTBG) and the GVSU Regional Math and Science Center and school systems in Miami, Anchorage, Grand Rapids, and El Paso.