Measurements necessary for assessing the net ecosystem carbon budget of ceoplands
| Autor: | Eddy Moors, Pierre Béziat, Gary Lanigan, Pete Smith, Werner L. Kutsch, Bruce Osborne, Michael P. Jones, Marc Aubinet, Werner Eugster, Martin Wattenbach, Aurore Brut, Matthew Saunders, Jagadeesh Yeluripati, Eric Ceschia, Nina Buchmann |
|---|---|
| Přispěvatelé: | 0 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Earth observation
Biogeochemical cycle Eddy covariance bornhoved lake district 550 - Earth sciences covariance flux measurements crop production netto ecosysteem koolstofbalans Atmospheric sciences land-use change greenhouse gases eddy covariance soil organic-matter eddy-correlation measurements Ecosystem Land use land-use change and forestry net ecosystem carbon balance CWK - Earth System Science and Climate Change Wageningen Environmental Research co2 efflux meetsystemen landbouwgrond Biomass (ecology) elevated co2 WIMEK eddy-covariantie Ecology Soil organic matter CWC - Earth System Science and Climate Change closed dynamic chambers gewasproductie long-term experiments agricultural land Greenhouse gas measurement systems Environmental science Animal Science and Zoology agricultural soils Agronomy and Crop Science broeikasgassen |
| Zdroj: | Agriculture, Ecosystems and Environment, 139(3), 302-315 Agriculture Ecosystems and Environment Agriculture, Ecosystems and Environment 139 (2010) 3 |
| ISSN: | 0167-8809 |
| Popis: | There are a number of methods that can be used to help assess carbon budgets at the site to continental scales. Eddy covariance (EC) networks have been developed over the last decade and have been used to make many advances in our understanding. However, eddy covariance measurements of CO2 and water vapour exchanges quantify the fluxes only on short time scales, but do not assess the impacts of long-term processes that contribute to biogeochemical cycling in croplands, such as harvest or residue removal and other management practices, so many other supplementary measurements are required to attribute different components of the carbon flux. Such methods include isotope studies, chamber flux measurements of C and other greenhouse gases, inventories of above- and below-ground biomass as well as management in- and outputs, book-keeping modelling, process modelling, experimental manipulation and earth observation (e.g. remote sensing). In this review, we summarise the component fluxes that make up the total cropland carbon budget, describe the key fluxes and methods used to estimate them, and examine how they need to be integrated to obtain the net ecosystem carbon budget of European croplands. We describe the uncertainties and difficulties inherent at each stage and how these can be minimised. |
| Databáze: | OpenAIRE |
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