Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations

Details Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations

May 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012e%26psl.329..141r&link_type=abstract

Earth and Planetary Science Letters, Volume 329, p. 141-149.

Computer Science

Scientific paper

Huybers and Langmuir (2009) proposed that an increase in volcanic activity provoked by ice sheet melting contributed substantially to the deglacial CO2 increase. Here, their hypothesis is evaluated by prescribing their central, high, and low volcanic CO2 emission scenarios in the Bern3D carbon cycle-climate model as a perturbation. Reconstructed emissions increase mainly between 15 and 11 ka BP, remain high in the early Holocene and drop after 7 ka BP in all scenarios with total emissions between 181 and 2011 GtC. Simulated increase of atmospheric CO2 peaks around 6 ka BP at 46 ppm for the central scenario and with a range between 13 and 142 ppm. Modeled carbonate ion concentration in the deep ocean decreases and the calcite saturation horizon shoals on global average by 440 m (150 to 1500 m). Simulated changes in δ13C and Δ14C isotopic signatures are small compared to reconstructed, proxy-based changes over the deglacial period. The comparison of our model results and available proxy evidence suggests a small role for volcanic carbon emissions in regulating glacial–interglacial CO2 variations, but uncertainties prevent a firm conclusion. A problem with the volcanic emission hypothesis is in the timing of emissions which peak in the early Holocene, a period of decreasing atmospheric CO2.

Affiliated with

Also associated with

No associations

Rating

Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Model limits on the role of volcanic carbon emissions in regulating glacial–interglacial CO2 variations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1551796