Long-term measurements of CO2 flux and evapotranspiration in a Chihuahuan desert grassland
| Autor: | W.A. Dugas, P. Mielnick, K. Mitchell, Kris M. Havstad |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Ecology biology Carbon uptake Co2 flux biology.organism_classification Grassland Atmosphere Flux (metallurgy) Evapotranspiration Environmental science Ecosystem Ecology Evolution Behavior and Systematics Bouteloua eriopoda Earth-Surface Processes |
| Zdroj: | Journal of Arid Environments. 60:423-436 |
| ISSN: | 0140-1963 |
| Popis: | We measured CO2 and evapotranspiration (ET) fluxes above a Chihuahuan desert grassland from 1996 through 2001. Averaged across six years, this ecosystem was a source (positive flux) of CO2 in every month. Over that period, sustained periods of carbon uptake (negative flux) were rare. Averaged across all months, we estimated that CO2 was being released into the atmosphere at a rate of +1.5 g CO2 m−2 d−1 (+0.40 g C m−2 d−1) or +533 g CO2 m−2 yr−1 (+145.3 g C m−2 yr−1). Average ET was 299 mm yr−1 with a monthly range of 0.15 mm d−1 in December to 2.15 mm d−1 in August. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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