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- Title
The Berkeley Environmental Air-quality and CO<sub>2</sub> Network: field calibrations of sensor temperature dependence and assessment of network scale CO<sub>2</sub> accuracy.
- Authors
Delaria, Erin R.; Kim, Jinsol; Fitzmaurice, Helen L.; Newman, Catherine; Wooldridge, Paul J.; Worthington, Kevin; Cohen, Ronald C.
- Abstract
The majority of global anthropogenic CO2 emissions originate in cities. We have proposed that dense networks are a strategy for tracking changes to the processes contributing to urban CO2 emissions and suggested that a network with ~2 km measurement spacing and ~1 ppm node-to-node precision would be effective at constraining point, line and area sources within cities. Here we report on an assessment of the accuracy of the Berkeley Environmental Air-quality and CO2 Network (BEACO2N) CO2 measurements over several years of deployment. We describe a new procedure for improving network accuracy that accounts for and corrects the temperature dependent zero offset of the Vaisala CarboCap GMP343 CO2 sensors used. With this correction we show that a total error of 1.6 ppm or less can be achieved for networks that have a calibrated reference location and 3.6 ppm for networks without a calibrated reference.
- Subjects
TEMPERATURE sensors; CALIBRATION
- Publication
Atmospheric Measurement Techniques Discussions, 2021, p1
- ISSN
1867-8610
- Publication type
Article
- DOI
10.5194/amt-2021-120