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Processed and quality controlled surface fluxes and meteorological observations at Westham Island (CA-Wes)

Christen, Andreas; Crawford, Benjamin; Grimmond, Sue; Ketler, Rick; Nesic, Zoran; Oke, Timothy; Voogt, James

Publisher
Zenodo
DOI
10.5281/zenodo.17116223
Repository
zenodo.org
Language
en

Abstract

Eddy covariance fluxes and meteorological observations at Westham Island (CA-Wes), an eddy covariance tower operated by the University of British Columbia (UBC) Vacouver, over unmanaged grassland site in the Lower Fraser Valley on in the Delta of the Fraser (Delta, BC, Canada) between 2007 and 2009. The site was operated as a rural reference site during the EPiCC project for evaluating models and contrasting urban observations. The flux data processing is described here: https://dx.doi.org/10.14288/1.0103593 Files containing fluxes are organized in monthly comma-separated text files using the naming convention "Westham-Island-EC-XXXX-YY", where XXXX is the year and YY is the month of the year. All flux data has a 30-min time resolution and contains the following fields: Code Station Parameter Height Unit WIUST1 Westham Island (CA-Wes) Friction Velocity 1.75m m / s WITKE1 Westham Island (CA-Wes) Turbulent Kinetic Energy 1.75m m2 / s2 WIQHB1 Westham Island (CA-Wes) Sensible Heat Flux (Best available) 1.75m W / m2 WIQEB1 Westham Island (CA-Wes) Latent Heat Flux (Best available) 1.75m W / m2 WIUSP1 Westham Island (CA-Wes) Wind u-Component (Internal) No. of Spikes 1.75m Count WIVSP1 Westham Island (CA-Wes) Wind v-Component (Internal) No. of Spikes 1.75m Count WIWSP1 Westham Island (CA-Wes) Wind w-Component (Internal) No. of Spikes 1.75m Count WITSP1 Westham Island (CA-Wes) Acoustic Temperature No. of Spikes 1.75m Count WIHSP1 Westham Island (CA-Wes) Water Vapour No. of Spikes 1.75m Count WICSP1 Westham Island (CA-Wes) Carbon Dioxide Molar Density No. of Spikes 1.75m Count WINST1 Westham Island (CA-Wes) Number of Samples (including invalid samples) 1.75m No WIPQF1 Westham Island (CA-Wes) Flux Processing Quality Flag 1.75m Code Files containing meteorology and soil conditions are organized in monthly comma-separated text files using the naming convention "Westham-Island-MET-XXXX-YY", where XXXX is the year and YY is the month of the year. All meteorology / soil data has a 5-min time resolution and contains the following fields: Code Station Parameter Height Unit WIWVA1 Westham Island (CA-Wes) Wind Velocity (Horizontal Scalar Mean) 1.75m m / s WIWVV1 Westham Island (CA-Wes) Wind Velocity (Horizontal Vector Mean) 1.75m m / s WIWDA1 Westham Island (CA-Wes) Wind Direction 1.75m degdeg WIICI1 Westham Island (CA-Wes) Wind Inclination (from Horiz. Plane) 1.75m degdeg WISDA2 Westham Island (CA-Wes) Shortwave Irradiance 1.50m W / m2 WISUA2 Westham Island (CA-Wes) Shortwave Reflectance 1.50m W / m2 WILDA2 Westham Island (CA-Wes) Longwave Downward Radiation 1.50m W / m2 WILUA2 Westham Island (CA-Wes) Longwave Upward Radiation 1.50m W / m2 WINRA2 Westham Island (CA-Wes) Net All-Wave Radiation 1.50m W / m2 WIPSA1 Westham Island (CA-Wes) Barometric Pressure 1.75m kPa WIDTA1 Westham Island (CA-Wes) Air Temperature 0.50m degC WIRHA1 Westham Island (CA-Wes) Relative Humidity 0.50m % WIDTA2 Westham Island (CA-Wes) Air Temperature 2.00m degC WIRHA2 Westham Island (CA-Wes) Relative Humidity 2.00m % WISTA1 Westham Island (CA-Wes) Soil Temperature -0.02m degC WIPCT1 Westham Island (CA-Wes) Precipitation 1.00m mm WICVA1 Westham Island (CA-Wes) Carbon Dioxide Molar Mixing Ratio 1.75m ppm

Full text

Selected publications on Westham Island: Technical reports !EPiCC Technical Report #1 - Processing and quality control procedures of turbulent flux measurements during the Vancouver EPiCC experiment. !EPiCC Technical Report #2 - Soil properties at the Vancouver EPiCC experimental sites. !EPiCC Technical Report #3 - Vegetation characteristics at the Vancouver EPiCC experimental sites. ! ! ! ! Grassland Flux Tower / Rural Reference Site Westham-Island by Andreas Christen(1) and Tim Oke(1) and in collaboration with Sue Grimmond(2), and James Voogt(3). (1) University of British Columbia, Department of Geography, Vancouver, BC, Canada. (2) University of Reading, Department of Meteorology, Reading, UK. (3) University of Western Ontario, Department of Geography, London, ON, Canada. In the CFCAS network 'EPiCC - Environmental Prediction in Canadian Cities', this climate and flux-tower served as a rural reference site. It was used in combination with the urban flux towers Vancouver-Sunset and Vancouver Oakridge to quantify urban climate modifications year-round. The instrumentation at this site was continuously operated between July 2007 and October 2009. Interactive panorama at the site in Fall 2008, also available in high-resolution for download with labels. Click on image and drag mouse to pan, use ↑ and ↓ keys to zoom in and out. The rural site ‘Westham Island’ is located on flat, unmanaged and non-irrigated grassland, 16 km to the south of the urban site in a remote area that is dominated by intensive farming (49.086°N. 123.177°W, WGS-84, 2 m a.s.l.). The site is characterized as Local Climate Zone 11 'low plant cover'. Instruments used in this study to measure radiative and turbulent fluxes were sited on a tripod system (CM-115, Campbell Scientific Inc., Logan, UT, USA), 1.5 and 1.8 m above the local ground surface. The site was colonized by a diverse set of tall grasses that ranged in average stand height between 0.5 m (winter) and a maximum of 175 m (August 2009). Heights of most instruments were adjusted in summer to account for the growing grass height. ! View of the Eddy-Covariance System on top of the tower. We measure continuously exchange of heat, water and carbondioxide above the urban surface. ! Site Characteristics Longitude / Latitude 123.1768ºW 49.0863ºN Height of flux system 1.8 / 2.2 m a.g.l. Data Products Wind roses from Westham Island (2007-09) Historical data graphs for Westham Island during the EPiCC experiment (2007-2009). Browse through available database entries. Data Tables Air Temperature (2m) 2007 2008 2009 Soil Temperature (-5cm) 2007 2008 2009 Soil Water Content 2007 2008 2009 Evapotranspiration 2007 2008 2009 Solar Irradiance 2007 2008 2009 Wind Velocity (4m) 2007 2008 2009 Model Products Long-term source areas for the Westham Island site. Acknowledgements This research site has been funded by: The Canadian Foundation for Climate and Atmospheric Sciences funded the operation from 2007-2009 as part of the Network Grant 'Environmental Prediction in Canadian Cities' (Oke and Voogt). Selected research infrastructure was supported by NSERC RTI (Christen, #344541-0). We thank Reynelda Farms (Hugh Reynolds) for their support and permission to operate this research infrastructure on their property. The following individuals contributed significantly to operation and data-collection: Jonathan Bau (UBC), Ben Crawford (UBC), Rick Ketler (UBC), Adrian Leitch (UBC), Kate Liss (UBC), Zoran Nesic (UBC), and Chad Siemens (UBC).