Long-term urban carbon dioxide observations reveal spatial and temporal dynamics related to urban characteristics and growth.

ABSTRACT: Cities are concentrated areas of CO₂ emissions and have become the foci of policies for mitigation actions. However, atmospheric measurement networks suitable for evaluating urban emissions over time are scarce. Here we present a unique long-term (decadal) record of CO₂ mole fractions from five sites across Utah's metropolitan Salt Lake Valley. We examine "excess" CO₂ above background conditions resulting from local emissions and meteorological conditions. We ascribe CO₂ trends to changes in emissions, since we did not find long-term trends in atmospheric mixing proxies. Three contrasting CO₂ trends emerged across urban types: negative trends at a residential-industrial site, positive trends at a site surrounded by rapid suburban growt

SUBMITTER: Mitchell LE 

PROVIDER: S-EPMC5866532 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature