Upscaling Tundra CO2 Exchange from Chamber to Eddy Covariance Tower
نویسندگان
چکیده
منابع مشابه
Upscaling Tundra CO2 Exchange from Chamber to Eddy Covariance Tower
Paul C. Stoy* Extrapolating biosphere-atmosphere CO2 flux observations to larger scales in space, part of Mathew Williams† the so-called ‘‘upscaling’’ problem, is a central challenge for surface-atmosphere exchange Jonathan G. Evans‡ research. Upscaling CO2 flux in tundra is complicated by the pronounced spatial variability Ana Prieto-Blanco§ of vegetation cover. We demonstrate that a simple mo...
متن کاملUncertainty analysis of eddy covariance CO2 flux measurements for different EC tower distances using an extended two-tower approach
The use of eddy covariance (EC) CO2 flux measurements in data assimilation and other applications requires an estimate of the random uncertainty. In previous studies, the (classical) two-tower approach has yielded robust uncertainty estimates, but care must be taken to meet the often competing requirements of statistical independence (nonoverlapping footprints) and ecosystem homogeneity when ch...
متن کاملForest floor CO2 fluxes estimated by eddy covariance and chamber-based model
An intercomparison study of two methods for estimating forest soil CO2 efflux was conducted during a 3-week period in summer. An empirical model established from nearly 2 years of chamber measurements predicted that the soil CO2 efflux ranged from 1.2 to 1.4 mmol m−2 s−1. This small range was due to the lack of variability in the model parameters (soil temperature and moisture) during the study...
متن کاملAssessment of Spatial Representativeness of Eddy Covariance Flux Data from Flux Tower to Regional Grid
Combining flux tower measurements with remote sensing or land surface models is generally regarded as an efficient method to scale up flux data from site to region. However, due to the heterogeneous nature of the vegetated land surface, the changing flux source areas and the mismatching between ground source areas and remote sensing grids, direct use of in-situ flux measurements can lead to maj...
متن کاملMethane fluxes measured by eddy covariance and static chamber techniques
Introduction Conclusions References
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Arctic, Antarctic, and Alpine Research
سال: 2013
ISSN: 1523-0430,1938-4246
DOI: 10.1657/1938-4246-45.2.275