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Suitability of the boreal ecosystem simulator (BEPS) model for estimating gross primary productivity in hemi-boreal upland pine forest

Fariha Harun
Fariha Harun
, 
Kaido Soosaar
Kaido Soosaar
, 
Alisa Krasnova
Alisa Krasnova
 et 
Jan Pisek
Jan Pisek
   | 04 juin 2022
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Article Category: Research paper
Publié en ligne: 04 juin 2022
Pages: 1 - 14
Reçu: 08 nov. 2021
Accepté: 25 déc. 2021
DOI: https://doi.org/10.2478/fsmu-2021-0008
Mots clés
© 2021 Fariha Harun et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Location and view of Soontaga flux tower.
Location and view of Soontaga flux tower.

Figure 2

(A) Top-of-Atmosphere shortwave reflectance composite (ETM+ Bands 7–4–2) over Soontaga area with the derived gamma variance of the surface albedo (B).
(A) Top-of-Atmosphere shortwave reflectance composite (ETM+ Bands 7–4–2) over Soontaga area with the derived gamma variance of the surface albedo (B).

Figure 3

GPP trajectories for 2016 (A), 2017 (B), 2018 (C), 2019 (D).
GPP trajectories for 2016 (A), 2017 (B), 2018 (C), 2019 (D).

Figure 4

Regressions between BEPS and tower daily GPP estimates in 2016 (A), 2017 (B), 2018 (C), 2019 (D). There are two regression lines in (A), one shows regession including GPP estimates with the missing meteorological data (empty circles; purple line), another is for the days without the missing values (full circles; red line).
Regressions between BEPS and tower daily GPP estimates in 2016 (A), 2017 (B), 2018 (C), 2019 (D). There are two regression lines in (A), one shows regession including GPP estimates with the missing meteorological data (empty circles; purple line), another is for the days without the missing values (full circles; red line).

Figure 5

Impact of precipitation, temperature and LAI inputs on BEPS GPP in 2016 (A), 2017 (B), s2018 (C), 2019 (D).
Impact of precipitation, temperature and LAI inputs on BEPS GPP in 2016 (A), 2017 (B), s2018 (C), 2019 (D).

Figure 6

Eddy covariance tower measurements and BEPS model retrievals with constant LAI input values of 1 and 2 in 2019.
Eddy covariance tower measurements and BEPS model retrievals with constant LAI input values of 1 and 2 in 2019.

Local weather conditions at Soontaga study site.

Year Average temperature of each year (°C) Annual total precipitation (cm) Warm/cold Dry/wet
2016 7.57 47.40 Cold Wet
2017 7.09 49.52 Cold Wet
2018 8.18 32.90 Warm Dry
2019 8.29 59.07 Warm Wet

Major parameters and values used in the BEPS model or input preparation.

Input parameters Values Reference
Clumping Index 0.69 For Soontaga site according to the global clumping index map by He et al. (2012), RSE
Scale factor for LAI (500 m pixel size) 0.1 MODIS product MCD15A3H.006 (USGS, 2021)

Annual total GPP from tower-based observations (with uncertainty values), BEPS model, and percentage difference.

Year GPP Tower (g C m−2) GPP BEPS (g C m−2) Difference (%)
2016 1447±16 1175 −23.12
2017 1166±6 1214 3.96
2018 1143±38 1345 14.96
2019 1288±2 1293 0.33
eISSN:
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