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  • Connolly, JohnUniversity College Dublin (author)

Using MODIS derived fPAR with ground based flux tower measurements to derive the light use efficiency for two Canadian peatlands

  • Article/chapterEnglish2009

Publisher, publication year, extent ...

  • 2009-02-19
  • Copernicus GmbH,2009
  • 234 s.

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:85d498ce-32b8-45f3-b742-10d34575bcd4
  • https://lup.lub.lu.se/record/85d498ce-32b8-45f3-b742-10d34575bcd4URI
  • https://doi.org/10.5194/bg-6-225-2009DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We used satellite remote sensing data; fractionof photosynthetically active radiation absorbed by vegetation(fPAR) from the Moderate Resolution Imaging Spectrora-diometer (MODIS) in combination with tower eddy covari-ance and meteorological measurements to characterise theLight Use Efficiency parameter (ε)variability and the maxi-mumε(εmax)for two contrasting Canadian peatlands. Eight-day MODISfPAR data were acquired for the Mer Bleue(2000 to 2003) and Western Peatland (2004). Flux towereddy covariance and meteorological measurements were in-tegrated to the same eight-day time stamps as the MODISfPAR data. A light use efficiency model: GPP =ε×APAR(where GPP is Gross Primary Productivity and APAR is ab-sorbed photosynthetically active radiation) was used to cal-culateε. Theεmaxvalue for each year (2000 to 2003) at theMer Bleue bog ranged from 0.58 g C MJ−1to 0.78 g C MJ−1and was 0.91 g C MJ−1in 2004, for the Western Peatland.The average growing seasonεfor the Mer Bleue bog forthe four year period was 0.35 g C MJ−1and for the West-ern Peatland in 2004 was 0.57 g C MJ−1. The average snowfree period for the Mer Bleue bog over the four years was 0.27 g C MJ−1and for the Western Peatland in 2004 was0.39 g C MJ−1. Using the light use efficiency method wecalculated theεmaxand the annual variability inεfor twoCanadian peatlands. We determined that temperature was agrowth-limiting factor at both sites Vapour Pressure Deficit(VPD) however was not. MODISfPAR is a useful tool forthe characterization ofεat flux tower sites.

Added entries (persons, corporate bodies, meetings, titles ...)

  • Roulet, Nigel T.McGill University (author)
  • Seaquist, JonathanLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)natg-jse (author)
  • Holden, N. M.University College Dublin (author)
  • Lafleur, Peter M.Trent University (author)
  • Humphreys, Elyn RCarleton University (author)
  • Heumann, B. W.University of North Carolina (author)
  • Ward, S. M.University College Dublin (author)
  • University College DublinMcGill University (creator_code:org_t)

Related titles

  • In:Biogeosciences: Copernicus GmbH32:6, s. 225-2251726-4189

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