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

Connolly, John LU ; Roulet, Nigel T. ; Seaquist, Jonathan LU ; Holden, N. M. ; Lafleur, Peter M. ; Humphreys, Elyn R ; Heumann, B. W. and Ward, S. M. (2009) In Biogeosciences 32(6). p.225-225
Abstract
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... (More)
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. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeosciences
volume
32
issue
6
pages
234 pages
publisher
Copernicus GmbH
external identifiers
  • scopus:60749123708
ISSN
1726-4189
DOI
10.5194/bg-6-225-2009
language
English
LU publication?
yes
id
85d498ce-32b8-45f3-b742-10d34575bcd4
date added to LUP
2019-05-30 12:41:21
date last changed
2021-03-03 05:06:04
@article{85d498ce-32b8-45f3-b742-10d34575bcd4,
  abstract     = {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.},
  author       = {Connolly, John and Roulet, Nigel T. and Seaquist, Jonathan and Holden, N. M. and Lafleur, Peter M. and Humphreys, Elyn R and Heumann, B. W. and Ward, S. M.},
  issn         = {1726-4189},
  language     = {eng},
  number       = {6},
  pages        = {225--225},
  publisher    = {Copernicus GmbH},
  series       = {Biogeosciences},
  title        = {Using MODIS derived fPAR with ground based flux tower measurements to derive the light use efficiency for two Canadian peatlands},
  url          = {http://dx.doi.org/10.5194/bg-6-225-2009},
  doi          = {10.5194/bg-6-225-2009},
  volume       = {32},
  year         = {2009},
}