Using MODIS derived f PAR with ground based flux tower
measurements to derive the light use efficiency for two
Canadian peatlands
Connolly, JohnORCID: 0000-0002-2897-9711, Roulet, N.T., Seaquist, J.W., Holden, Nicholas M.ORCID: 0000-0002-2897-9711, Lafleur, P.M., Humphreys, E.R., Heumann, B.W. and Ward, Shane M.ORCID: 0000-0003-3068-9745
(2009)
Using MODIS derived f PAR with ground based flux tower
measurements to derive the light use efficiency for two
Canadian peatlands.
Biogeosciences, 6
.
pp. 225-234.
ISSN 1726-4170
We used satellite remote sensing data; fraction
of photosynthetically active radiation absorbed by vegetation
(f PAR) from the Moderate Resolution Imaging Spectroradiometer (MODIS) in combination with tower eddy covariance and meteorological measurements to characterise the
Light Use Efficiency parameter (ε) variability and the maximum ε (εmax) for two contrasting Canadian peatlands. Eightday MODIS f PAR data were acquired for the Mer Bleue
(2000 to 2003) and Western Peatland (2004). Flux tower
eddy covariance and meteorological measurements were integrated to the same eight-day time stamps as the MODIS
f PAR data. A light use efficiency model: GPP = ε×APAR
(where GPP is Gross Primary Productivity and APAR is absorbed photosynthetically active radiation) was used to calculate ε. The εmax value for each year (2000 to 2003) at the
Mer Bleue bog ranged from 0.58 g C MJ−1
to 0.78 g C MJ−1
and was 0.91 g C MJ−1
in 2004, for the Western Peatland.
The average growing season ε for the Mer Bleue bog for
the four year period was 0.35 g C MJ−1
and for the Western Peatland in 2004 was 0.57 g C MJ−1
. The average snow
free period for the Mer Bleue bog over the four years was
0.27 g C MJ−1
and for the Western Peatland in 2004 was
0.39 g C MJ−1
. Using the light use efficiency method we
calculated the εmax and the annual variability in ε for two
Canadian peatlands. We determined that temperature was a
growth-limiting factor at both sites Vapour Pressure Deficit
(VPD) however was not. MODIS f PAR is a useful tool for
the characterization of ε at flux tower sites.
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Funders:
Enterprise Ireland through the International Collaboration Travel Support grant, Environmental Protection Agency (Ireland) for the Short Term Research Mission grant
ID Code:
23582
Deposited On:
18 Jul 2019 15:51 by
Thomas Murtagh
. Last Modified 18 Jul 2019 15:51