Long Term Patterns of and Controls on Inter- and Intra-annual Variability in CO2 Flux in the Alaskan Arctic

阿拉斯加北极地区二氧化碳通量的长期模式和控制

• 批准号: 0119060
• 负责人: Walter Oechel
• 金额: $ 48.87万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0119060&HistoricalAwards=false
• 关键词: Long; Term; Patterns; Controls; Inter

This project will examine the potential effect of climate warming on the annual storage and/or release of carbon dioxide from tundra on the western Alaska North Slope. The measurements will be made with eddy flux towers in Barrow, Atqasuk, and Ivotuk Alaska and the results compared to remote sensing data from the MODIS satellite instruments. This study represents a continuation and expansion of a long-term examination of terrestrial responses to climate change on the Alaska North Slope. This phase of the study will examine variations of carbon dioxide flux in response to oscillations of the Arctic Oscillation on seasonal, annual, and decadal time scales. The regional results will be used in computer simulations of the ecosystem in order to build a predictive capacity to the research as more is known about climate change in the region. The acclimation of the ecosystem and soil moisture from temporal changes in net ecosystem carbon flux will be determined over varying time-scales. The study is important to understanding regional and annual patterns, particularly the variability, of carbon dioxide flux from tundra ecosystems at a time when climate warming appears to be affecting the terrestrial environment.

该项目将研究气候变暖对阿拉斯加北坡西部苔原每年储存和/或释放二氧化碳的潜在影响。 测量将与涡流通量塔在巴罗，Atqasuk，和Ivotuk阿拉斯加和结果相比，遥感数据从中分辨率成像分光仪卫星仪器。 这项研究是对阿拉斯加北坡陆地对气候变化反应的长期研究的延续和扩展。 这一阶段的研究将研究二氧化碳通量的变化，以响应季节，年度和十年时间尺度上的北极涛动的振荡。 区域结果将用于生态系统的计算机模拟，以便随着对该区域气候变化的了解越来越多，建立研究的预测能力。将在不同的时间尺度上确定生态系统和土壤水分对净生态系统碳通量随时间变化的适应。 在气候变暖似乎正在影响陆地环境之际，这项研究对于了解冻原生态系统二氧化碳通量的区域和年度模式，特别是变异性具有重要意义。