English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We analyze the North American budget for carbon monoxide using data for CO andformaldehyde concentrations from tall towers and aircraft in a model-dataassimilation framework. The Stochastic Time-Inverted Lagrangian Transportmodel for CO (STILT-CO) determines local to regional-scale CO contributionsassociated with production from fossil fuel combustion, biomass burning, andoxidation of volatile organic compounds (VOCs) using an ensemble of Lagrangianparticles driven by high resolution assimilated meteorology. In many cases,the model demonstrates high fidelity simulations of hourly surface data from talltowers and point measurements from aircraft, with somewhat less satisfactory performancein coastal regions and when CO from large biomass fires in Alaska and the YukonTerritory influence the continental US.  Inversions of STILT-CO simulations for CO and formaldehyde show that currentinventories of CO emissions from fossil fuel combustion are significantly toohigh, by almost a factor of three in summer and a factor two in early spring,consistent with recent analyses of data from the INTEX-A aircraft program.Formaldehyde data help to show that sources of CO from oxidation of CH<sub>4</sub>and other VOCs represent the dominant sources of CO over North America in summer

Sources of carbon monoxide and formaldehyde in North America determined from high-resolution atmospheric data