Interfield and intrafield variability of methyl halide emissions from rice paddies

K R  Redeker; J  Andrews; F  Fisher; R  Sass; R J  Cicerone

doi:10.1029/2002GB001874

Interfield and intrafield variability of methyl halide emissions from rice paddies

K R Redeker, J Andrews, F Fisher, R Sass, R J Cicerone

Research output: Contribution to journal › Article › peer-review

Abstract

[1] Methyl halide gases are important sources of atmospheric inorganic halogen radicals. We measured methyl halide emissions from three rice fields over two full growing seasons. Rice paddy emissions of methyl chloride, methyl bromide and methyl iodide are insignificant until field flooding. Rice growth stage determines methyl bromide and methyl iodide emissions while methyl chloride emissions are comparable between planted and unplanted plots. Houston, Texas, and Maxwell, California, field integrated seasonal fluxes of methyl chloride, methyl bromide and methyl iodide are consistent (values range from 2.3 to 3.9, 0.8 to 1.1, and 28.1 to 62.0 mg m(-2), respectively) despite differences in multiple field parameters. We also examined field emission variability using 12 chamber placements. Methyl bromide and methyl iodide emissions within homogenous rice paddies require at least three replicates to determine field mean fluxes within 20%, and for methyl chloride emissions, over 10 replications per field are necessary.

Original language	English
Article number	1125
Pages (from-to)	-
Number of pages	9
Journal	Global Biogeochemical Cycles
Volume	16
Issue number	4
DOIs	https://doi.org/10.1029/2002GB001874
Publication status	Published - 10 Dec 2002

Access to Document

10.1029/2002GB001874

Cite this

@article{39d5648976314f0bbebe4802c15756aa,

title = "Interfield and intrafield variability of methyl halide emissions from rice paddies",

abstract = "[1] Methyl halide gases are important sources of atmospheric inorganic halogen radicals. We measured methyl halide emissions from three rice fields over two full growing seasons. Rice paddy emissions of methyl chloride, methyl bromide and methyl iodide are insignificant until field flooding. Rice growth stage determines methyl bromide and methyl iodide emissions while methyl chloride emissions are comparable between planted and unplanted plots. Houston, Texas, and Maxwell, California, field integrated seasonal fluxes of methyl chloride, methyl bromide and methyl iodide are consistent (values range from 2.3 to 3.9, 0.8 to 1.1, and 28.1 to 62.0 mg m(-2), respectively) despite differences in multiple field parameters. We also examined field emission variability using 12 chamber placements. Methyl bromide and methyl iodide emissions within homogenous rice paddies require at least three replicates to determine field mean fluxes within 20%, and for methyl chloride emissions, over 10 replications per field are necessary.",

author = "Redeker, {K R} and J Andrews and F Fisher and R Sass and Cicerone, {R J}",

year = "2002",

month = dec,

day = "10",

doi = "10.1029/2002GB001874",

language = "English",

volume = "16",

pages = "--",

journal = "Global Biogeochemical Cycles",

issn = "0886-6236",

publisher = "American Geophysical Union",

number = "4",

}

TY - JOUR

T1 - Interfield and intrafield variability of methyl halide emissions from rice paddies

AU - Redeker, K R

AU - Andrews, J

AU - Fisher, F

AU - Sass, R

AU - Cicerone, R J

PY - 2002/12/10

Y1 - 2002/12/10

N2 - [1] Methyl halide gases are important sources of atmospheric inorganic halogen radicals. We measured methyl halide emissions from three rice fields over two full growing seasons. Rice paddy emissions of methyl chloride, methyl bromide and methyl iodide are insignificant until field flooding. Rice growth stage determines methyl bromide and methyl iodide emissions while methyl chloride emissions are comparable between planted and unplanted plots. Houston, Texas, and Maxwell, California, field integrated seasonal fluxes of methyl chloride, methyl bromide and methyl iodide are consistent (values range from 2.3 to 3.9, 0.8 to 1.1, and 28.1 to 62.0 mg m(-2), respectively) despite differences in multiple field parameters. We also examined field emission variability using 12 chamber placements. Methyl bromide and methyl iodide emissions within homogenous rice paddies require at least three replicates to determine field mean fluxes within 20%, and for methyl chloride emissions, over 10 replications per field are necessary.

AB - [1] Methyl halide gases are important sources of atmospheric inorganic halogen radicals. We measured methyl halide emissions from three rice fields over two full growing seasons. Rice paddy emissions of methyl chloride, methyl bromide and methyl iodide are insignificant until field flooding. Rice growth stage determines methyl bromide and methyl iodide emissions while methyl chloride emissions are comparable between planted and unplanted plots. Houston, Texas, and Maxwell, California, field integrated seasonal fluxes of methyl chloride, methyl bromide and methyl iodide are consistent (values range from 2.3 to 3.9, 0.8 to 1.1, and 28.1 to 62.0 mg m(-2), respectively) despite differences in multiple field parameters. We also examined field emission variability using 12 chamber placements. Methyl bromide and methyl iodide emissions within homogenous rice paddies require at least three replicates to determine field mean fluxes within 20%, and for methyl chloride emissions, over 10 replications per field are necessary.

U2 - 10.1029/2002GB001874

DO - 10.1029/2002GB001874

M3 - Article

SN - 0886-6236

VL - 16

SP - -

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

IS - 4

M1 - 1125

ER -