Emissions of methyl halides and methane from rice paddies.
Science
; 290(5493): 966-9, 2000 Nov 03.
Article
en En
| MEDLINE
| ID: mdl-11062125
ABSTRACT
Methyl halide gases are important sources of atmospheric inorganic halogen compounds, which in turn are central reactants in many stratospheric and tropospheric chemical processes. By observing emissions of methyl chloride, methyl bromide, and methyl iodide from flooded California rice fields, we estimate the impact of rice agriculture on the atmospheric budgets of these gases. Factors influencing methyl halide emissions are stage of rice growth, soil organic content, halide concentrations, and field-water management. Extrapolating our data implies that about 1 percent of atmospheric methyl bromide and 5 percent of methyl iodide arise from rice fields worldwide. Unplanted flooded fields emit as much methyl chloride as planted, flooded rice fields.
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Banco de datos:
MEDLINE
Asunto principal:
Oryza
/
Hidrocarburos Halogenados
/
Metano
País/Región como asunto:
America do norte
Idioma:
En
Año:
2000
Tipo del documento:
Article