Measuring and Modeling Component and Whole-System Carbon Exchange

Bolstad, Paul

Paul Bolstad/University of Minnesota

关键词: Forests;    Feedback;    Carbon Sinks;    Disturbances;    Wetlands Ecosystem, Carbon, Biometrics, Eddy Flux, Landscape, Forest, Wetland;   

DOI  :  10.2172/894651
RP-ID  :  DO/FG/63682-1
RP-ID  :  FG02-03ER63682
RP-ID  :  894651

美国|英语

来源: UNT Digital Library

【 摘 要 】

We measured ecosystem/atmospheric carbon exchange through a range of methods covering a range of scales. We measured carbon (C) pool and flux for a number of previously poorly quantified ecosystems, developed measurement and modeling methods, and applied these to substantially increase the accuracy and reduce uncertainty in ecosystem/atmospheric C exchange at a range of scales. It appears most upland forests are weak to strong carbon sinks, and status depends largely on disturbance history and age. Net flux from wetland ecosystems appears to be from weak sinks to moderate sources of C to the atmosphere. We found limited evidence for a positive feedback of warming/drying to increased ecosystem C emissions. We further developed multi-source integration and modeling methods, including multiple towers, to scale estimates to landscapes and larger regions.