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SEADOG

Sea ice across Dansgaard-Oeschger events in Greenland

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

SEADOG project word cloud

Explore the words cloud of the SEADOG project. It provides you a very rough idea of what is the project "SEADOG" about.

boundary causation successfully scenarios deg arctic underlying controls ice ocean deposition closely abrupt aerosol msa consistent cool evolution marine atmospheric output dansgaard run cooling cycles recurring relevance methane proxies modeling reproduce transport 10 antarctic meteorology retreat cambridge influence palaeoclimatic onset responsible interfaced sea salt recorded climate atmosphere uncertain oeschger millennial core warm records greenland followed positively combines last separate chemistry linked interstadial coupled spatial acid cools sheet stadial model gradual na rapid sulphonic punctuated temperature northern sensitivity phenomenon analysed variability gross hemisphere relative indication events glacial cores feedback data temporal tomcat played obtain tests changing magnitude mechanism suggest

Project "SEADOG" data sheet

The following table provides information about the project.

Coordinator	THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE Organization address address: TRINITY LANE THE OLD SCHOOLS city: CAMBRIDGE postcode: CB2 1TN website: www.cam.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	United Kingdom [UK]
Project website	https://www.esc.cam.ac.uk/directory/R-Rhodes
Total cost	183˙454 €
EC max contribution	183˙454 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2014
Funding Scheme	MSCA-IF-EF-RI
Starting year	2015
Duration (year-month-day)	from 2015-10-01 to 2017-09-30

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE Organization address address: TRINITY LANE THE OLD SCHOOLS city: CAMBRIDGE postcode: CB2 1TN website: www.cam.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	UK (CAMBRIDGE)	coordinator	183˙454.00

Map

Project objective

The Last Glacial climate of the Northern Hemisphere was punctuated by abrupt millennial scale changes called Dansgaard-Oeschger (DO) events, clearly recorded by Greenland ice core temperature proxies. The underlying mechanism responsible for the recurring cycles of ~10°C rapid increase, followed by gradual cooling, remains uncertain. Many studies suggest that large changes in sea ice extent played a major role in their causation. Sea ice is closely linked to climate; changes in sea ice extent feedback positively on Arctic temperature—a phenomenon of great relevance to the future of Arctic sea ice in our changing climate. This project combines Greenland ice core chemistry records with atmospheric chemistry transport modeling in order to constrain Arctic sea ice variability across DO events. Records of sea salt (Na), and methane sulphonic acid (MSA), from four ice cores will be analysed for spatial and temporal variability across DO events. The controls on marine aerosol deposition over the Greenland Ice Sheet will be investigated using a atmospheric chemistry transport model, Cambridge p-TOMCAT, which has been successfully deployed for the Antarctic. The relative influence of sea ice and other factors e.g., meteorology, on ice core chemistry variability will be assessed using sensitivity tests that will also provide an indication of the gross sea ice changes in required to reproduce the significant sea salt changes recorded in ice cores. Furthermore, an atmospheric chemistry transport model, that can be interfaced with fully coupled ocean-atmosphere climate model output, will be optimised according to our findings. This model will be run with palaeoclimatic boundary conditions to obtain scenarios of sea ice change consistent with the ice core chemistry data. Separate tests will constrain the magnitude of sea ice retreat at the onset of DO events and the temporal evolution of sea ice conditions as climate cools from warm interstadial to cool stadial conditions.

Publications

List of publications.
year	authors and title	journal	last update
2018	Rachael H. Rhodes, Xin Yang, Eric W. Wolff Sea Ice Versus Storms: What Controls Sea Salt in Arctic Ice Cores? published pages: , ISSN: 0094-8276, DOI: 10.1029/2018GL077403	Geophysical Research Letters	2019-07-24
2017	Rachael H. Rhodes, Xin Yang, Eric W. Wolff, Joseph R. McConnell, Markus M. Frey Sea ice as a source of sea salt aerosol to Greenland ice cores: a model-based study published pages: 9417-9433, ISSN: 1680-7324, DOI: 10.5194/acp-17-9417-2017	Atmospheric Chemistry and Physics 17/15	2019-07-24
2017	Rachael H. Rhodes, Edward J. Brook, Joseph R. McConnell, Thomas Blunier, Louise C. Sime, Xavier FaÃ¯n, Robert Mulvaney Atmospheric methane variability: Centennial-scale signals in the Last Glacial Period published pages: 575-590, ISSN: 0886-6236, DOI: 10.1002/2016GB005570	Global Biogeochemical Cycles 31/3	2019-07-24

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