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Methane emission modelling using MODIS thermal and optical data: A case study on Gujarat

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Abstract

Wetlands are one of the most important sources of atmospheric methane (CH4) contributing about 22% to the global methane budget. But to improve estimates of CH4 emission at regional and global scales there is a need to observe the sources such as wetlands frequently and develop process-based models. In this regard, wetland inventory using satellite remote sensing data has conventionally been carried out by analysis of optical data. Due to thermal inertia differences emittive thermal channels data has shown promise to provide highly critical information about wetlands such as water spread, aquatic vegetation and mud flats etc. Thermal channels data of MODIS (Moderate Resolution Imaging Spectroradiometer) sensor with a spatial resolution of 1km and swath of 2330 km is emerging as the key source of remote sensing data for global/ regional wetland estimation and assessment of green house gas emission. In the present study MODIS thermal channels (31 and 32) and optical channels (1,2, and 3) data have been used for evaluating methane emission from wetlands in Gujarat. An empirical model based on temperature and productivity has been used to investigate the response of methane emission from different sources. Model has the potential to estimate country level methane emission based on satellite remote sensing in conjunction with collateral data/information. In this study. MODIS data of two dates pertaining to Gujarat have been analyzed and results compared with respect to methane emission.

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Authors and Affiliations

  1. Space Applications Center (ISRO), 380015, Ahmedabad, India

    Reshu Agarwal & J. K. Garg

Authors
  1. Reshu Agarwal
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  2. J. K. Garg
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Correspondence to Reshu Agarwal.

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Agarwal, R., Garg, J.K. Methane emission modelling using MODIS thermal and optical data: A case study on Gujarat. J Indian Soc Remote Sens 35, 323–331 (2007). https://doi.org/10.1007/BF02990788

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  • DOI: https://doi.org/10.1007/BF02990788

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