Global climate simulations at 3000-year intervals for the last 21,000 years with the GENMOM coupled atmosphere–ocean model Public Deposited

http://ir.library.oregonstate.edu/concern/articles/x920fz68f

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can be found at:  http://www.climate-of-the-past.net/index.html.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • We apply GENMOM, a coupled atmosphere–ocean climate model, to simulate eight equilibrium time slices at 3000-year intervals for the past 21,000 years forced by changes in Earth–Sun geometry, atmospheric greenhouse gases (GHGs), continental ice sheets, and sea level. Simulated global cooling during the Last Glacial Maximum (LGM) is 3.8°C and the rate of post-glacial warming is in overall agreement with recently published temperature reconstructions. The greatest rate of warming occurs between 15 and 12 ka (2.4°C over land, 0.7°C over oceans, and 1.4°C globally) in response to changes in radiative forcing from the diminished extent of the Northern Hemisphere (NH) ice sheets and increases in GHGs and NH summer insolation. The modeled LGM and 6 ka temperature and precipitation climatologies are generally consistent with proxy reconstructions, the PMIP2 and PMIP3 simulations, and other paleoclimate data–model analyses. The model does not capture the mid-Holocene “thermal maximum” and gradual cooling to preindustrial (PI) global temperature found in the data. Simulated monsoonal precipitation in North Africa peaks between 12 and 9 ka at values ~50% greater than those of the PI, and Indian monsoonal precipitation peaks at 12 and 9 ka at values ~45% greater than the PI. GENMOM captures the reconstructed LGM extent of NH and Southern Hemisphere (SH) sea ice. The simulated present-day Antarctica Circumpolar Current (ACC) is ~48% weaker than the observed (62 versus 119 Sv). The simulated present-day Atlantic Meridional Overturning Circulation (AMOC) of 19:3 ± 1:4 Sv on the Bermuda Rise (33°N) is comparable with observed value of 18:7 ± 4:8 Sv. AMOC at 33°N is reduced by ~15% during the LGM, and the largest post-glacial increase (~11 %) occurs during the 15 ka time slice.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Alder, J. R., & Hostetler, S. W. (2015). Global climate simulations at 3000 year intervals for the last 21,000 years with the GENMOM coupled atmosphere-ocean model. Climate of the Past, 11(3), 449-471. doi:10.5194/cp-11-449-2015
Series
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2015-05-01T18:07:22Z (GMT) No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) AlderJayCEOASGlobalClimateSimulations.pdf: 10077381 bytes, checksum: 219ed948642c1f353d275d8cf60aa90b (MD5) AlderJayCEOASGlobalClimateSimulations_SupplementalMaterial.pdf: 13228179 bytes, checksum: 8ce916c8c071f608cbe21599f29d8af1 (MD5)
  • description.provenance : Made available in DSpace on 2015-05-01T18:07:22Z (GMT). No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) AlderJayCEOASGlobalClimateSimulations.pdf: 10077381 bytes, checksum: 219ed948642c1f353d275d8cf60aa90b (MD5) AlderJayCEOASGlobalClimateSimulations_SupplementalMaterial.pdf: 13228179 bytes, checksum: 8ce916c8c071f608cbe21599f29d8af1 (MD5) Previous issue date: 2015-03-17
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2015-05-01T18:07:05Z No. of bitstreams: 3 license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5) AlderJayCEOASGlobalClimateSimulations.pdf: 10077381 bytes, checksum: 219ed948642c1f353d275d8cf60aa90b (MD5) AlderJayCEOASGlobalClimateSimulations_SupplementalMaterial.pdf: 13228179 bytes, checksum: 8ce916c8c071f608cbe21599f29d8af1 (MD5)

Relationships

Parents:

This work has no parents.

Last modified Default

Items