TY - JOUR
T1 - Estimation of methane emission from rice paddy soils in Japan using the diagnostic ecosystem model
AU - Sasai, Takahiro
AU - Nakai, Saori
AU - Ono, Keisuke
AU - Mano, Masayoshi
AU - Miyata, Akira
N1 - Funding Information:
The corresponding author is deeply grateful to Tamon Fumoto, Michiko Hayano, Gwang-Hyun Han and Leslie J. Cobar. We are grateful to the MODIS (https://lpdaac.usgs.gov), GPCP (http://precip.gsfc.nasa.gov), atmospheric CO2 (http://cdiac.ornl.gov), soil data set (https://daac.ornl.gov), NASA, JMA, JAXA, MAFF, NCEP, CDIAC, and IGBP dataset providers. All data for this paper is properly cited and referred to in the reference list. A part of this research was supported by the Social Implementation Program on Climate Change Adaptation Technology (SI-CAT), the Global Change Observation Mission (GCOM: PI#102) of the Japan Aerospace Exploration Agency (JAXA), and the Environment Research and Technology Development Fund (S-15) of the Ministry of the Environment, Japan.
PY - 2017
Y1 - 2017
N2 - It is needed to accurately evaluate the methane emission from paddy fields at a national scale for both scientific and political purposes. The existing approaches have shared a common issue with obtaining the realistic information on spatiotemporal variations of crop management. Satellite sensor could possibly detect them, but the methodology to link the satellite observations to the methane emission has not been established. In this study, we enhanced the existing diagnostic satellite-driven paddy ecosystem model, the Biosphere model integrating Eco-physiological And Mechanistic approaches using satellite data for regional Cropland (BEAMS-C) (Sasai et al., 2012), by integrating the methane processes and examined the potential of this approach by comparing the estimated nation-wide methane emission with that by the existing approaches. The carbon flux estimations had good agreements with the measurements at the Mase paddy flux site. In regional-scale analyses in Japan, methane emission averaged from 2001 to 2010 was 15.0 gC m-2 year-1, which was similar to the Tire-1 and -2 results. If we have a continuing improvement of the diagnostic approach, it could be one of the most efficient tools for estimating the methane flux at national scales.
AB - It is needed to accurately evaluate the methane emission from paddy fields at a national scale for both scientific and political purposes. The existing approaches have shared a common issue with obtaining the realistic information on spatiotemporal variations of crop management. Satellite sensor could possibly detect them, but the methodology to link the satellite observations to the methane emission has not been established. In this study, we enhanced the existing diagnostic satellite-driven paddy ecosystem model, the Biosphere model integrating Eco-physiological And Mechanistic approaches using satellite data for regional Cropland (BEAMS-C) (Sasai et al., 2012), by integrating the methane processes and examined the potential of this approach by comparing the estimated nation-wide methane emission with that by the existing approaches. The carbon flux estimations had good agreements with the measurements at the Mase paddy flux site. In regional-scale analyses in Japan, methane emission averaged from 2001 to 2010 was 15.0 gC m-2 year-1, which was similar to the Tire-1 and -2 results. If we have a continuing improvement of the diagnostic approach, it could be one of the most efficient tools for estimating the methane flux at national scales.
KW - Carbon cycle
KW - Diagnostic ecosystem model
KW - Methane
KW - Remote sensing
KW - Rice paddy
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U2 - 10.2480/agrmet.D-16-00013
DO - 10.2480/agrmet.D-16-00013
M3 - Article
AN - SCOPUS:85023635149
VL - 73
SP - 133
EP - 139
JO - J. AGRICULTURAL METEOROLOGY
JF - J. AGRICULTURAL METEOROLOGY
SN - 0021-8588
IS - 3
ER -