Measurement and Scaling of Carbon Budgets for Contrasting Boreal Forest Sites

对比北方森林地点的碳预算的测量和缩放

• 批准号: 9221668
• 负责人: Stith Gower
• 金额: $ 12.54万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9221668&HistoricalAwards=false
• 关键词: Measurement; Scaling; Carbon; Budgets; Contrasting

The objective of this study is to compare process related to CO2 storage (ie photosynthesis and accumulation of soil C and CO2 release (ie. plant respiration and decomposition) for evergreen and deciduous forests in two contrasting boreal climates and is part of a large international study (BOREAS) to examine terrestrial atmosphere interactions in boreal ecosystems in Prince Albert National Park, Saskatchewan and nelson House, Manitoba, Canada. Data collected during the study will increase our understanding of the influence of major biotic and abiotic factors on carbon cycling in boreal forests. A concurrent activity will be to develop computer simulation models that we will use to examine the influence of different climate change scenarios on the growth of boreal forests. %%% The global carbon cycle recently has been the focus of much research in an attempt to explain the rising atmospheric CO2 concentration; CO2 is of interest because it is a major greenhouse gas. Forests can be a net sink (ie. store CO2), a source (ie. release CO2) or in equilibrium (ie. no net change) depending upon stand age, stand vigor and climate. Boreal forest comprise approximately 25% of the total forested area in the world and contain greater than 40% of the total world soil carbon; therefore, this forest biome is likely to have an important role in the global carbon cycle. Moreover, the role of boreal forests in the global carbon cycle may change more in the future than any other biome because general circulation models that are used to predict future climate suggests that the boreal biome will experience the greatest change in climate.

本研究的目的是比较两种截然不同的北方气候下常绿林和落叶林与二氧化碳储存（即光合作用和土壤碳积累以及二氧化碳释放（即植物呼吸和分解）相关的过程），并且是一项大型国际研究的一部分（BOREAS）研究萨斯喀彻温省阿尔伯特王子国家公园和加拿大马尼托巴省尼尔森之家的北方生态系统中陆地大气的相互作用，该研究期间收集的数据将增加我们对气候影响的了解。影响北方森林碳循环的主要生物和非生物因素 我们将使用该模型来研究不同气候变化情景对北方森林最近全球碳循环的影响。一直是许多研究的焦点，试图解释大气中二氧化碳浓度的上升；二氧化碳之所以引起人们的关注，是因为它是一种主要的温室气体。 森林可以是净汇（即储存二氧化碳）、源头（即释放二氧化碳）或处于平衡状态（即无净变化），具体取决于林分年龄、林分活力和气候。 北方森林约占世界森林总面积的 25%，并含有世界土壤碳总量的 40% 以上；因此，该森林生物群落可能在全球碳循环中发挥重要作用。 此外，北方森林在全球碳循环中的作用未来可能会比任何其他生物群落发生更大的变化，因为用于预测未来气候的大气环流模型表明北方生物群落将经历最大的气候变化。