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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/123/05/1089-1096

    • Keywords

       

      Eddy covariance; mangrove forests; methane flux; Sundarbans.

    • Abstract

       

      We report the initial results of the methane flux measured using eddy covariance method during summer months from the world’s largest mangrove ecosystem, Sundarbans of India. Mangrove ecosystems are known sources for methane (CH4) having very high global warming potential. In order to quantify the methane flux in mangroves, an eddy covariance flux tower was recently erected in the largest unpolluted and undisturbed mangrove ecosystem in Sundarbans (India). The tower is equipped with eddy covariance flux tower instruments to continuously measure methane fluxes besides the mass and energy fluxes. This paper presents the preliminary results of methane flux variations during summer months (i.e., April and May 2012) in Sundarbans mangrove ecosystem. The mean concentrations of CH4 emission over the study period was 1682 ± 956 ppb. The measured CH4 fluxes computed from eddy covariance technique showed that the study area acts as a net source for CH4 with daily mean flux of 150.22 ± 248.87 mg m−2 day−1. The methane emission as well as its flux showed very high variability diurnally. Though the environmental conditions controlling methane emission is not yet fully understood, an attempt has been made in the present study to analyse the relationships of methane efflux with tidal activity. This present study is part of Indian Space Research Organisation–Geosphere Biosphere Program (ISRO–GBP) initiative under ‘National Carbon Project’.

    • Author Affiliations

       

      Chandra Shekhar Jha1 Suraj Reddy Rodda2 Kiran Chand Thumaty1 A K Raha2 V K Dadhwal1

      1. National Remote Sensing Centre (ISRO), Balanagar, Hyderabad 500 037, India.
      2. West Bengal Forest Department, Salt Lake, Kolkata 700 098, India.

    • Dates

       
      Published
      July 2014
      Manuscript received
      9 May 2013
      Manuscript revised
      20 February 2014
      Accepted
      20 February 2014

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