Collaborative Research: Using the ITEX-AON network to document and understand terrestrial ecosystem change in the Arctic

合作研究：利用 ITEX-AON 网络记录和了解北极陆地生态系统的变化

• 批准号: 1836898
• 负责人: Steven Oberbauer
• 金额: $ 105.8万
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1836898&HistoricalAwards=false
• 关键词: Collaborative; Research; Using; ITEX; AON

The overarching goal of the project is to understand tundra ecosystem change across landscape types and enable realistic forecasts of change across the Arctic. The power of the International Tundra Experiment (ITEX)- Arctic Observatory Network (AON) is founded on a capacity to synthesize and compare results across sites that use standardized sampling protocols. Specifically, this project will (1) maintain the data-streams at ITEX-AON sites in Alaska near Toolik Lake, Imnavait Creek, Utqiagvik (Barrow), and Atqasuk; (2) lead two new ITEX network syntheses focused on soil carbon and phenocam imagery; (3) increase scientific literacy; and, (4) expand citizen science opportunities across communities in northern Alaska. The project will sustain an array of large and publicly available data-streams documenting ecosystem change occurring across the Arctic and will team up with citizen scientists to expand the monitoring footprint of the network and the societal relevance of this work to communities across the North Slope of Alaska. The ITEX network was chartered in 1990 to document and understand the ecological impacts of a warming Arctic. The US-led ITEX projects expanded their monitoring efforts across a larger spatial area with the use of automated sampling to form an Arctic Observatory Network (AON) in 2009. The ITEX-AON currently includes traditional ITEX measurements (phenology, cover, carbon flux and nutrient cycling), as well as phenocams, automated mobile sensor platforms (MISP) and mid-scale aerial imagery of 1 km2 ARCSS (Arctic System Science) grids established in the 1990s. In this phase of the project, collection of core data sets will be sustained and new data sets will be added with the aim of identifying and understanding patterns of change and feedbacks. Specifically, ITEX-AON will expand its collection of vegetation functional traits to better understand ecosystem response and predict future change. ITEX-AON will also further expand automated measurements to link plot level change (sampled by hand or with hand-held equipment) with landscape level observations (sampled by phenocams or drones) and high resolution regional imagery (sampled by aircraft or satellite). The new phase of ITEX-AON will include two synthesis efforts: (1) an examination of soil carbon dynamics across the ITEX network, and (2) a multi-scale phenological analysis using phenocam and high resolution satellite imagery to determine fine-scale spatiotemporal patterns of seasonal greening trends across the Arctic. Mentoring of postdocs, and training of graduate and undergraduate students are some of the primary broader impacts of this project. The project will continue to provide a test bed for engineering and software development that will be shared freely among the ITEX network and broader science community and will expand outreach activities aimed at improving science literacy.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

项目成果

Global plant trait relationships extend to the climatic extremes of the tundra biome

全球植物性状关系延伸至苔原生物群落的极端气候

• DOI: 10.1038/s41467-020-15014-4
• 发表时间: 2020
• 期刊: Nature Communications
• 影响因子: 16.6
• 作者: Thomas, H. J.;Bjorkman, A. D.;Myers-Smith, I. H.;Elmendorf, S. C.;Kattge, J.;Diaz, S.;Vellend, M.;Blok, D.;Cornelissen, J. H.;Forbes, B. C.
• 通讯作者: Forbes, B. C.

Remote Sensing of Tundra Ecosystems Using High Spectral Resolution Reflectance: Opportunities and Challenges

• DOI: 10.1029/2021jg006697
• 发表时间: 2021-11
• 期刊: Journal of Geophysical Research: Biogeosciences
• 作者: P. Nelson;A. Maguire;Z. Pierrat;Erica L Orcutt;Dedi Yang;S. Serbin;G. Frost;M. Macander;T. Magney;D. Thompson;Jonathan A. Wang;S. Oberbauer;S. V. Zesati;S. Davidson;H. Epstein;Steven Unger;Petya K. E. Campbell;N. Carmon;M. Velez-Reyes;K. Huemmrich

NDVI Changes Show Warming Increases the Length of the Green Season at Tundra Communities in Northern Alaska: A Fine-Scale Analysis

• DOI: 10.3389/fpls.2020.01174
• 发表时间: 2020-07-31
• 期刊: FRONTIERS IN PLANT SCIENCE
• 影响因子: 5.6
• 作者: May, Jeremy L.;Hollister, Robert D.;Oberbauer, Steven F.
• 通讯作者: Oberbauer, Steven F.

The ABCflux database: Arctic–boreal CO₂ flux observations and ancillary information aggregated to monthly time steps across terrestrial ecosystems

ABCflux 数据库：北极 - 北方 CO₂ 通量观测值和辅助信息汇总为整个陆地生态系统的每月时间步长

• DOI: 10.5194/essd-14-179-2022
• 发表时间: 2022
• 期刊: Earth System Science Data
• 影响因子: 11.4
• 作者: Virkkala​​​​​​​, Anna-Maria;Natali, Susan M.;Rogers, Brendan M.;Watts, Jennifer D.;Savage, Kathleen;Connon, Sara June;Mauritz, Marguerite;Schuur, Edward A.;Peter, Darcy;Minions, Christina
• 通讯作者: Minions, Christina