Evidence for Upwelling of Corrosive "Acidified" Water onto the Continental Shelf

  title={Evidence for Upwelling of Corrosive "Acidified" Water onto the Continental Shelf},
  author={R. Feely and C. Sabine and J. M. Hernandez-Ayon and D. Ianson and B. Hales},
  pages={1490 - 1492}
The absorption of atmospheric carbon dioxide (CO2) into the ocean lowers the pH of the waters. This so-called ocean acidification could have important consequences for marine ecosystems. To better understand the extent of this ocean acidification in coastal waters, we conducted hydrographic surveys along the continental shelf of western North America from central Canada to northern Mexico. We observed seawater that is undersaturated with respect to aragonite upwelling onto large portions of the… Expand
Inorganic carbon dynamics during northern California coastal upwelling
Abstract Coastal upwelling events in the California Current System can transport subsurface waters with high levels of carbon dioxide (CO 2 ) to the sea surface near shore. As these waters age andExpand
Microbial biogeochemistry of coastal upwelling regimes in a changing ocean
The coastal upwelling regimes located along the eastern boundaries of the Pacific and Atlantic Ocean basins are small in size, but make a disproportionate contribution to the productivity andExpand
Upwelling Amplifies Ocean Acidification on the East Australian Shelf: Implications for Marine Ecosystems
Frequent upwelling of cold deep water rich in dissolved inorganic nutrients but low in oxygen concentrations and pH is well documented in so-called Eastern-boundary systems. As a consequence vastExpand
Ocean acidification in the three oceans surrounding northern North America
[1] The uptake of anthropogenic CO2 drives ocean acidification, with attendant effects on the saturation state of calcium carbonate (Ω) and marine ecosystems. Here, we examine ocean acidificationExpand
Aragonite Undersaturation in the Arctic Ocean: Effects of Ocean Acidification and Sea Ice Melt
The increase in anthropogenic carbon dioxide emissions and attendant increase in ocean acidification and sea ice melt act together to decrease the saturation state of calcium carbonate in the Canada Basin of the Arctic Ocean. Expand
Acidification of subsurface coastal waters enhanced by eutrophication
Human inputs of nutrients to coastal waters can lead to the excessive production of algae, a process known as eutrophication. Microbial consumption of this organic matter lowers oxygen levels in theExpand
Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia
The Strait of Georgia (SoG) is a large semienclosed estuary that spatially dominates the Salish Sea on the North American Pacific coast. The region is well populated, harbors significant aquaculture,Expand
Chemical and biological impacts of ocean acidification along the west coast of North America
Abstract The continental shelf region off the west coast of North America is seasonally exposed to water with a low aragonite saturation state by coastal upwelling of CO2-rich waters. To date, theExpand
Evidence of prolonged aragonite undersaturations in the bottom waters of the southern Bering Sea shelf from autonomous sensors
Abstract The southeastern shelf of the Bering Sea is a dynamic area that experiences seasonal variability in primary production and remineralization of organic matter, both of which control theExpand
Calcium carbonate corrosivity in an Alaskan inland sea
Ocean acidification is the hydrogen ion increase caused by the oceanic uptake of anthropogenic CO2, and is a focal point in marine biogeochemistry, in part, because this chemical reaction reducesExpand


Atmospheric CO2 uptake by a coastal upwelling system
[i] A biological pump for transferring atmospheric CO 2 to deep ocean regimes has been identified in the upwelling zone of the U.S. Pacific coast off Oregon using high-resolution measurements of PExpand
The inorganic carbon system in the coastal upwelling region west of Vancouver Island, Canada
Abstract We present inorganic carbon data from the coastal upwelling region west of Vancouver Island, Canada (∼48.5° N , 126° W ) directly after an upwelling event and during summer downwelling inExpand
Carbon and nutrient dynamics during coastal upwelling off Cape Blanco, Oregon
The partial pressure of carbon dioxide (PCO 2 ) and concentrations of the nutrients phosphate (P) and silicate (Si) in coastal surface waters within a 100 km]300 km area centered on Cape Blanco,Expand
Impact of Anthropogenic CO2 on the CaCO3 System in the Oceans
The in situ CaCO3 dissolution rates for the global oceans from total alkalinity and chlorofluorocarbon data are estimated, and the future impacts of anthropogenic CO2 on Ca CO3 shell–forming species are discussed. Expand
Anthropogenic ocean acidification over the twenty-first century and its impact on calcifying organisms
13 models of the ocean–carbon cycle are used to assess calcium carbonate saturation under the IS92a ‘business-as-usual’ scenario for future emissions of anthropogenic carbon dioxide and indicate that conditions detrimental to high-latitude ecosystems could develop within decades, not centuries as suggested previously. Expand
Distribution of anthropogenic CO2 in the Pacific Ocean
[1] This work presents an estimate of anthropogenic CO2 in the Pacific Ocean based on measurements from the WOCE/JGOFS/OACES global CO2 survey. These estimates used a modified version of the ΔC*Expand
In situ calcium carbonate dissolution in the Pacific Ocean
Over the past several years researchers have been working to synthesize the WOCE/ JGOFS global CO2 survey data to better understand carbon cycling processes in the oceans. The Pacific Ocean data setExpand
Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean
As a part of the JGOFS synthesis and modeling project, researchers have been working to synthesize the WOCE/JGOFS/DOE/NOAA global CO2 survey data to better understand carbon cycling processes in theExpand
Inorganic carbon in the central California upwelling system during the 1997–1999 El Niño–La Niña event
Abstract Sea surface pCO2 was monitored during 49 cruises from February 1997 to December 1999 along a section perpendicular to the central California Coast. Continuous measurements of theExpand
Impact of elevated CO2 on shellfish calcification
[1] Ocean acidification resulting from human emissions of carbon dioxide has already lowered and will further lower surface ocean pH. The consequent decrease in calcium carbonate saturationExpand