Impacts of urban carbon dioxide emissions on sea-air flux and ocean acidification in nearshore waters

TitleImpacts of urban carbon dioxide emissions on sea-air flux and ocean acidification in nearshore waters
Publication TypeJournal Article
Year of Publication2019
AuthorsNorthcott D., Sevadjian J., Sancho-Gallegos D.A, Wahl C., Friederich J., Chavez F.P
JournalPlos One
Volume14
Date Published2019/03
Type of ArticleArticle
ISBN Number1932-6203
Accession NumberWOS:000462465800063
Keywordsbreeze; exchange; pacific; Science & Technology - Other Topics; wind
Abstract

Greatly enhanced atmospheric carbon dioxide (CO2) levels relative to well-mixed marine air are observed during periods of offshore winds at coastal sensor platforms in Monterey Bay, California, USA. The highest concentrations originate from urban and agricultural areas, are driven by diurnal winds, and peak in the early morning. These enhanced atmospheric levels can be detected across a similar to 100km wide nearshore area and represent a significant addition to total oceanic CO2 uptake. A global estimate puts the added sea-air flux of CO2 from these greatly enhanced atmospheric CO2 levels at 25 million tonnes, roughly 1% of the ocean's annual CO2 uptake. The increased uptake over the 100 km coastal swath is of order 20%, indicating a potentially large impact on ocean acidification in productive coastal waters.

DOI10.1371/journal.pone.0214403
Student Publication: 
No