Reevaluation of global emissions from rice paddies of methyl iodide and other species

J  Lee-Taylor; K R  Redeker

doi:10.1029/2005GL022918

Reevaluation of global emissions from rice paddies of methyl iodide and other species

J Lee-Taylor, K R Redeker

Biology

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

Abstract

We present new modeled estimates of global methyl halide emissions from rice cultivation. We extrapolate existing data on rice behavior, including temperature, seasonality and soil moisture effects, to the global scale and on a monthly basis. Our best estimates are 2.4 to 4.9 Gg yr(-1) for methyl chloride, 0.5 to 0.9 Gg yr(-1) for methyl bromide, and 16 to 29 Gg yr(-1) for methyl iodide, with additional uncertainty ranges of +/- 73%, +/- 87% and +/- 75%, respectively. Our central range of estimates reflects the greatest remaining model uncertainty, emission response to soil halide concentrations. We find that peak emissions of methyl halides, especially methyl iodide, are sharply defined in regional and temporal extent. Ambient temperature strongly influences rice emissions of methyl bromide and methyl iodide, which rise by similar to 10% for an increase of 1 degrees C.

Original language	English
Article number	L15801
Pages (from-to)	-
Number of pages	5
Journal	Geophysical Research Letters
Volume	32
Issue number	15
DOIs	https://doi.org/10.1029/2005GL022918
Publication status	Published - 2 Aug 2005

Access to Document

10.1029/2005GL022918

Cite this

@article{4fb10b4ee6bd41679cc17c43f6619a7d,

title = "Reevaluation of global emissions from rice paddies of methyl iodide and other species",

abstract = "We present new modeled estimates of global methyl halide emissions from rice cultivation. We extrapolate existing data on rice behavior, including temperature, seasonality and soil moisture effects, to the global scale and on a monthly basis. Our best estimates are 2.4 to 4.9 Gg yr(-1) for methyl chloride, 0.5 to 0.9 Gg yr(-1) for methyl bromide, and 16 to 29 Gg yr(-1) for methyl iodide, with additional uncertainty ranges of +/- 73%, +/- 87% and +/- 75%, respectively. Our central range of estimates reflects the greatest remaining model uncertainty, emission response to soil halide concentrations. We find that peak emissions of methyl halides, especially methyl iodide, are sharply defined in regional and temporal extent. Ambient temperature strongly influences rice emissions of methyl bromide and methyl iodide, which rise by similar to 10% for an increase of 1 degrees C.",

author = "J Lee-Taylor and Redeker, {K R}",

year = "2005",

month = aug,

day = "2",

doi = "10.1029/2005GL022918",

language = "English",

volume = "32",

pages = "--",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "American Geophysical Union",

number = "15",

}

TY - JOUR

T1 - Reevaluation of global emissions from rice paddies of methyl iodide and other species

AU - Lee-Taylor, J

AU - Redeker, K R

PY - 2005/8/2

Y1 - 2005/8/2

N2 - We present new modeled estimates of global methyl halide emissions from rice cultivation. We extrapolate existing data on rice behavior, including temperature, seasonality and soil moisture effects, to the global scale and on a monthly basis. Our best estimates are 2.4 to 4.9 Gg yr(-1) for methyl chloride, 0.5 to 0.9 Gg yr(-1) for methyl bromide, and 16 to 29 Gg yr(-1) for methyl iodide, with additional uncertainty ranges of +/- 73%, +/- 87% and +/- 75%, respectively. Our central range of estimates reflects the greatest remaining model uncertainty, emission response to soil halide concentrations. We find that peak emissions of methyl halides, especially methyl iodide, are sharply defined in regional and temporal extent. Ambient temperature strongly influences rice emissions of methyl bromide and methyl iodide, which rise by similar to 10% for an increase of 1 degrees C.

AB - We present new modeled estimates of global methyl halide emissions from rice cultivation. We extrapolate existing data on rice behavior, including temperature, seasonality and soil moisture effects, to the global scale and on a monthly basis. Our best estimates are 2.4 to 4.9 Gg yr(-1) for methyl chloride, 0.5 to 0.9 Gg yr(-1) for methyl bromide, and 16 to 29 Gg yr(-1) for methyl iodide, with additional uncertainty ranges of +/- 73%, +/- 87% and +/- 75%, respectively. Our central range of estimates reflects the greatest remaining model uncertainty, emission response to soil halide concentrations. We find that peak emissions of methyl halides, especially methyl iodide, are sharply defined in regional and temporal extent. Ambient temperature strongly influences rice emissions of methyl bromide and methyl iodide, which rise by similar to 10% for an increase of 1 degrees C.

U2 - 10.1029/2005GL022918

DO - 10.1029/2005GL022918

M3 - Article

SN - 0094-8276

VL - 32

SP - -

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 15

M1 - L15801

ER -