The Ocean2k group attempts to reconstruct and analyze the sea surface conditions and marine climate of the last two millennia. Paleoceanographic evidence will be compiled from high-resolution archives, mostly sedimentary cores and corals.
The group's overall objectives, as for all of the 2k regional groups, will be data compilation, spatial and temporal synopsis, comparison with models, and synthesis.
These are the Ocean2k groups' scientific goals and tasks for the short term future:
Build a metadatabase of publicly available, Ocean2k-relevant paleoproxy datasets and model simulations.
- Selection by Ocean2k-relevant metadatabase criteria, from publicly-available and cited/published data sources.
- To be completed and made available via internet: January 2012.
Create a review paper on synthesis of marine climate variations over the past 2000 years.
- To be submitted July 2012, in time to be useful for the IPCC AR5 WG1 report.
a. Placement of observed historical marine conditions into 2K context.
b. Synthesis of existing appropriate paleodata: robust features in mean variance and/or distribution; principal uncertainties.
c. Synthesis of existing appropriate climate model output: robust features in mean, variance and/or distribution; principal uncertainties.
a. Historical marine climate: principal large-scale oceanic patterns of variation.
b. Principal external and internal forcing mechanisms, with focus on those for which the 2K study interval should be especially illuminating.
c. Proxy observations: principal types, distribution, interpretation, uncertainties.
d. Model simulations: principal formulations, included physics/chemistry/biology, uncertainties.
e. Synthesis methods: structure/methodology, sensitivities, uncertainties.
a. Synthesis of paleodata availability; robust patterns observed in time, space, frequency, selected time intervals of interest.
b. Synthesis of model simulations and marine variables or diagnostics resolved in the paleodata.
- Possible focus topics (subject to results from Goal (A), metadatabase development):
- North Atlantic meridional overturning circulation
- AMO-like activity
- LIA/MCA transition
a. Where/when/how is there agreement between models for and observations of marine climate over the past 2 millennia?
- Evaluation of agreement between models and observations as robust basis for interpretation and study of 2K mechanisms, given uncertainties.
b. Where/when/how is there disagreement between models for and observations of marine climate over the past 2 millennia?
- Evaluation of agreement between models and observations as robust basis for identifying fruitful areas for futher study, given uncertainties.
Figure: The six ocean regions for the regional data analysis and synthesis performed by groups of volunteers.
Work towards a synthesis of global paleodata and paleomodeling efforts (for contribution to the overall 2k synthesis product).
- How does the ocean data/modeling 'fit' into the picture emerging from the more mature regional 2k syntheses?
If you are interested in contributing to this Working Group, please contact one of the co-leaders listed below.
Mike Evans - Univ. Maryland, US - overall lead
Helen McGregor - Univ. Wollongong, AUS - coral records
Delia Oppo - WHOI, US - sedimentary records
Hugues Goosse - Louvain-la-Neuve, Belgium - modeling
Cyril Giry - Atlantic Ocean
Guillaume Leduc - Southern Ocean
Belen Martrat - Mediterranean and Arctic
Jessica Tierney - Indian Ocean
Henry Wu - Pacific Ocean
Bruce Bauer - NOAA Paleoclimatology, USA - data management
Ed Harrison - NOAA/PMEL, Seattle, WA, USA - CLIVAR link
Thorsten Kiefer - PAGES, Switzerland - PAGES link and data management
Valérie Masson-Delmotte - LSCE, Gif-sur-Yvette, France - PAGES/CLIVAR link
Jessica Tierney (co-lead)
Henry Wu (co-lead)
Guillaume Leduc (co-lead)
Helen McGregor (co-lead)
Henry C. Wu (lead)
Jessica Tierney (lead)
Cyril Giry (lead Atlantic)
Belen Martrat (lead Arctic & Mediterranean)
Anuar El Ouahabi
Guillaume Leduc (lead)
Volunteer Metadata Curators
Jason A Addison
Basanta Raj Adhikari
M. Waseem Ashiq
Sean P. Bryan
Rodrigo Abarca del Río
M. Carmen Alvarez-Castro
Carin Andersson Dahl
Anuar El Ouahabi
Joan O. Grimalt
Helga Bára Bartels Jónsdóttir
Kelly H. Kilbourne
Andrew William Kingston
Mahjoor Ahmad Lone
Sena Akçer Ön
Juan F. Paniagua
Maria Serena Poli
Sudhir Raj Shrestha
Ko Hiu Tung
Amy J. Wagner
Alan D. Wanamaker Jr.