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

北极观测网络：合作研究：通过自动化和增加观测的跨学科性来维持和扩大 ITEX AON

• 批准号: 1432982
• 负责人: Steven Oberbauer
• 金额: $ 21.15万
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1432982&HistoricalAwards=false
• 关键词: Arctic; Observing; Networks; Collaborative; Research

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.

国际苔原实验 (ITEX) 于 1990 年成立，旨在测试温度升高对苔原植物物候、生长、物种组成和生态系统功能的影响。 自 2007 年以来，ITEX-北极观测站网络 (ITEX-AON) 继续并扩展了 ITEX 计划，涵盖阿拉斯加和格陵兰岛五个地点的纬度横断面，收集专门用于满足北极环境变化研究 (SEARCH) 实施报告中概述的当前需求的核心 ITEX 数据。 这项工作的目标是保持阿拉斯加和格陵兰 ITEX-AON 时间关键数据集的连续性。 核心数据集包括长期ITEX控制和实验增温样地的物候、植被结构和组成、生态系统功能和地表特性的长期人工观测、1km2 ARCSS网格上植被样地的重复测量以及格陵兰岛的多因素增温-湿度实验。 小规模同时测量多个表面特性可以检测以前未认识到的关系，例如，在密集样带的苔藓为主的区域，较高的反照率与较高的温度有关。 继续进行这些测量是必要的，因为越来越多的证据表明，先前生长季节的遗留影响对当前和未来的反应至关重要，而且系统固有的变异性妨碍了在几年的基础上确定系统反应。 该项目的数据可在 ACADIS 网站上免费获取。 该项目将继续开展初始阶段建立的广泛外展活动，包括仙童热带植物园 (FTBG) 与 GVSU 地区数学和科学中心以及迈阿密、安克雷奇、大急流城和埃尔帕索的学校系统之间的牢固关系。