The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Andreas Persson

Andreas Persson

Senior lecturer

Andreas Persson

Upscaling of methane exchange in a boreal forest using soil chamber measurements and high-resolution LiDAR elevation data

Author

  • Elin Sundqvist
  • Andreas Persson
  • Natascha Kljun
  • Patrik Vestin
  • L. Chasmer
  • C. Hopkinson
  • Anders Lindroth

Summary, in English

Forest soils are generally considered to be net sinks of methane (CH4), but CH4 fluxes vary spatially depending on soil conditions. Measuring CH4 exchange with chambers, which are commonly used for this purpose, might not result in representative fluxes at site scale. Appropriate methods for upscaling CH4 fluxes from point measurements to site scale are therefore needed. At the boreal forest research site, Norunda, chamber measurements of soils and vegetation indicate that the site is a net sink of CH4, while tower gradient measurements indicate that the site is a net source of CH4. We investigated the discrepancy between chamber and tower gradient measurements by upscaling soil CH4 exchange to a 100 ha area based on an empirical model derived from chamber measurements of CH4 exchange and measurements of soil moisture, soil temperature and water table depth. A digital elevation model (DEM) derived from high-resolution airborne Light Detection and Ranging (LiDAR) data was used to generate gridded water table depth and soil moisture data of the study area as input data for the upscaling. Despite the simplistic approach, modeled fluxes were significantly correlated to four out of five chambers with R>0.68. The upscaling resulted in a net soil sink of CH4 of -10 mu mol m(-2) h(-1), averaged over the entire study area and time period June-September, 2010). Our findings suggest that additional contributions from CH4 soil sources outside the upscaling study area and possibly CH4 emissions from vegetation could explain the net emissions measured by tower gradient measurements. (C) 2015 Elsevier B.V. All rights reserved.

Department/s

  • Dept of Physical Geography and Ecosystem Science
  • Centre for Environmental and Climate Science (CEC)
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publishing year

2015

Language

English

Pages

393-401

Publication/Series

Agricultural and Forest Meteorology

Volume

214

Document type

Journal article

Publisher

Elsevier

Topic

  • Climate Research
  • Meteorology and Atmospheric Sciences

Keywords

  • Methane consumption
  • Soil temperature
  • moisture
  • Soil
  • Topographic wetness index
  • Water table depth
  • Methane (CH4) fluxes

Status

Published

ISBN/ISSN/Other

  • ISSN: 1873-2240