Evaluating a high-resolution urban fossil CO2 emissions inventory using eddy-covariance flux measurements and source partitioning | CU Experts

We present the first quantitative comparison of source-partitioned CO2; flux measurements with a high-resolution urban fossil CO2 emissions; inventory. We use tower-based measurements of CO and 14C to partition; net CO2 flux measurements into fossil and biogenic components in a; suburban environment. A flux footprint model is used to quantify spatial; patterns in fluxes. The partitioned fossil CO2 emissions are compared to; a 200-m resolution emissions inventory (Hestia). The results indicate; that Hestia and the partitioned flux data agree remarkably well on a; seasonal average scale. The Hestia inventory is biased by 3.2% (cold; season) and 9.1% (warm season). Their temporal-spatial patterns match; closely. In addition, biogenic CO2 uptake is 25% of local fossil; emissions during afternoon in the cold season. This work demonstrates; the effectiveness of using eddy-covariance flux measurements both for; evaluating urban emissions inventories and for quantifying urban; ecosystem fluxes.

Wu K; Davis KJ; Miles NL; Richardson SJ; Lauvaux T; Sarmiento D; Balashov N; Keller K; Turnbull JC; Gurney KR

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