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年被租用，以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-北极天文台网络（ITEX-AON）一直在Alaska和Greenland的五个地点的纬度样带上继续并扩展了ITEX程序，并收集了专门针对环境北极变化（搜索）实施报告中概述的当前需求的核心ITEX数据。 这项工作的目的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。 核心数据集包括对物候学的长期手动观察，植被结构和组成，生态系统功能以及长期ITEX控制和实验性变暖图上的表面特性，重复测量1km2 Arcss网格上的植被图，以及在Greenland中的多效应器加热实验。 在小规模上同时测量了多个表面特性，已允许检测以前未知的关系，例如，在强化样带的苔藓为主的区域中，较高的反照率与较高的温度有关。 继续进行这些测量值是必须的，因为增加证据表明，以前生长季节对当前和未来响应的结转影响至关重要，并且系统的固有变异性排除了几年的确定系统响应。 该项目的数据可在Acadis网站上免费获得。 该项目将继续在初始阶段建立的广泛的外展活动，包括Fairchild Tropical Botanic Garden（FTBG）与GVSU地区数学和科学中心以及迈阿密，Anchorage，Grand Rapids和El Paso之间的牢固关系。