Pierrat, Zoe;
Barr, Alan G.;
Stutz, Jochen;
Johnson, Bruce;
Helgason, Warren
—
2022-02-02
Search Results
Federated Research Data Repository / dépôt fédéré de données de recherche
Ahmed, Hafiz Faizan;
Helgason, Warren;
Barr, Alan G.;
Black, T. Andrew
—
2024-03-27
Long-term observations are presented here from two coniferous (jack pine and black spruce) and one deciduous (aspen) forest sites located in central Saskatchewan, Canada. These sites were initiated through the Boreal Ecosystem and Atmosphere Study (BOREAS) program during 1994-96 (http://boreas.gsfc.nasa.gov/) and were later operated under the Boreal Ecosystem Research and Monitoring Sites (BERMS) program. All three sites were equipped with rich instrumentation that include walk-up scaffold towers fitted with sensors to measure air temperature, humidity and wind speed, above canopy shortwave and longwave radiation components, as well as fluxes of energy, carbon and water. Other onsite measurements included precipitation, snow depth, snow density, snow temperature, soil temperature and moisture profiles. These observations are useful for an improved understanding about the contrasts among sites. Moreover, the data is also very useful for modelling applications (calibration and validation). In addition to site observations, dynamically downscaled future meteorological observations by the Weather Research Forecast (WRF) model using Pseudo Global Warming (PGW) approach are included in the dataset. The WRF data was biased corrected by quantile-mapping method using the observed dataset. Thus, the data is ideal for testing, development, calibration, improvement, and validation of hydrological and/or land surface models as well as for projecting future changes in critical processes under changing climate.
https://creativecommons.org/licenses/by/4.0/
Federated Research Data Repository / dépôt fédéré de données de recherche
Nazarbakhsh, Mahtab;
Ireson, Andrew;
Barr, Alan G.
—
2024-03-27
Land surface schemes can be applied to simulate evapotranspiration. This dataset contains the driving meteorological data, and various diagnostic data, from one of the Boreal Ecosystem Research and Monitoring Sites in central Saskatchewan, known as the Old Jack Pine site. In Nazarbakhsh et al. (2019, Hydrological Processes, https://doi.org/10.1002/hyp.13674) we used these data to drive two Canadian land surface schemes (CLASS and CLASS–CTEM). We used half–hourly values of shortwave radiation, longwave radiation, precipitation, air temperature, specific humidity, wind speed, and atmospheric pressure to drive the models. Flux tower estimates of evapotranspiration, with energy balance closure applied, were used to assess the performance of the models on daily and monthly timescales for years 2000 to 2010. We also used soil moisture (measured with Campbell Scientific CS615 probes, which measure liquid water content only) and soil temperature observations for years 2000 to 2010 to assess the models’ performance during the snowmelt and soil–thaw periods in the spring.
https://creativecommons.org/licenses/by/4.0/
Federated Research Data Repository / dépôt fédéré de données de recherche
Helgason, Warren;
Johnson, Bruce;
David, Cody;
Barr, Alan G.;
Black, Andrew
—
2024-10-24
Long-term observations are presented here from the Boreal Ecosystem Research and Monitoring Sites (BERMS), a network of flux tower research sites located near the southern edge of the Boreal Plains Ecozone in central Saskatchewan, Canada. The four longest running sites, which represent the dominant vegetation types in the Boreal Plains Ecozone, include three mature forest stands of trembling aspen (Old Aspen; OA), black spruce (Old Black Spruce; OBS), and jack pine (Old Jack Pine; OJP), and a minerotrophic patterned fen (Fen). The data reported here include long-term records of a) meteorological variables, including air temperature and humidity, barometric pressure, wind speed, wind direction and precipitation; b) vertical profiles of soil temperature and soil volumetric water content; c) radiation flux densities, including net radiation, incoming and outgoing shortwave radiation, incoming and outgoing longwave radiation, and incoming and outgoing photosynthetically active radiation; d) the surface energy balance, including net radiation, soil heat flux, biomass heat storage flux, photosynthetic energy flux and eddy covariance measurements of latent and sensible heat flux densities; and e) eddy covariance measurements of net ecosystem production and its partition into gross ecosystem photosynthesis and ecosystem respiration. There are both gap-filled and non-gap-filled datasets included with this submission. Other variables collected from these sites, but are not included in the dataset, can be made available upon request (snow depth, snow temperature, bole temperature, water table depth, water table level).
https://creativecommons.org/licenses/by/4.0/
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