Welcome to the NOAA Institutional Repository | Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island - :13184 | Office of Oceanic and Atmospheric Research (OAR)
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Significant discharge of CO2 from hydrothermalism associated with the submarine volcano of El Hierro Island
  • Published Date:
    2016
Filetype[PDF - 1.53 MB]


Details:
  • Description:
    The residual hydrothermalism associated with submarine volcanoes, following an eruption event, plays an important role in the supply of CO2 to the ocean. The emitted CO2 increases the acidity of seawater. The submarine volcano of El Hierro, in its degasification stage, provided an excellent opportunity to study the effect of volcanic CO2 on the seawater carbonate system, the global carbon flux, and local ocean acidification. A detailed survey of the volcanic edifice was carried out using seven CTD-pH-ORP tow-yo studies, localizing the redox and acidic changes, which were used to obtain surface maps of anomalies. In order to investigate the temporal variability of the system, two CTD-pH-ORP yo-yo studies were conducted that included discrete sampling for carbonate system parameters. Meridional tow-yos were used to calculate the amount of volcanic CO2 added to the water column for each surveyed section. The inputs of CO2 along multiple sections combined with measurements of oceanic currents produced an estimated volcanic CO2 flux = 6.0 10(5) +/- 1.1 10(5) kg d(-1) which is similar to 0.1% of global volcanic CO2 flux. Finally, the CO2 emitted by El Hierro increases the acidity above the volcano by similar to 20%.

  • Document Type:
  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: