AWIAWI

GEOTRACES Arctic Cruise Planning Meeting

8-10 June 2009Delmenhorst, Germany

35 geochemists from Canada, China, European Union, Russia and USA

Funding:

COST14 MC/WG members2 Experts COST countries5 Experts non-COST countries Conference costs

US GEOTRACES 8 participants US

SCOR 4 participants

HWK

Ursula SchauerAlfred-Wegener Institute for polar and marine research, GermanyWarming and freshening of the Arctic Ocean in the 2000s

Peter SchlosserLamont-Doherty Earth Observatory, USACirculation patterns, mean residence times and freshwater components in the Arctic Ocean

John Smith Bedford Institute of Oceanography, CanadaApplications of Radionuclide Tracers to Process Studies in the Arctic Ocean

Leif Anderson Dept of chemistry, Göteborg University, SwedenThe Arctic Ocean Carbon Cycle in a Changing Environment

Introductory presentations

Overview of past IPY expeditions

Cruise Planning and long term ship schedules

Advocacy talksLars-Eric Heimbürger: Mercury in the ArcticAla Aldahan: Iodine as a geotracerDavid Kadko: : Be-7 measurements in the ArcticBilly Moore: Marine Groundwater DischargeMark Baskaran: Interaction of ice-rafted sediments and

surface seawater using short- & long-lived

nuclide tracersBill Landing (poster) Aerosol and Rainfall Sampling and Analysis

for GEOTRACES

Breakout groups 1: Scientific Questions

1 : Sea ice•Inputs of TEI in sea ice•Transport of TEI by sea ice•Role of sea ice algae in TEI cycling•Role of sea ice in TEI cycling in central Arctic

2 : Rivers and shelves•Riverine inputs to the Arctic•Groundwater inputs to Arctic shelves•Shelf processes•Dense brine formation

3 : Aerosols and atmospheric deposition•Seasonality and trends of fluxes•What are the source regions•Effects of atmospheric deposition on water column

4 : Exchange with Atlantic and Pacific•Inputs and outputs at the choke points

Breakout groups 2: Sections and Process Studies

1 : Choke points and Nordic Seas

2 : Rivers and shelves

3: Deep basins and hydrothermal input

1.Choke points/Gateways

Bering Strait

Russian-US mooring(v, T,S) exists

Proposed sections

1.Choke pointsLink with existing hydrographic programs

Fram Strait 1.Choke pointsLink with existing hydrographic programs

Davis Strait 1.Choke pointsLink with existing hydrographic programs

Norway-Bear Island-Spitzbergen 1.Choke pointsLink with existing hydrographic programs

Greenland-Iceland-Faroe-Shetlandsections and moorings

1.Choke pointsLink with existing hydrographic programs

Canada3Oceans 1.Choke pointsLink with existing hydrographic programs

2. Rivers and Shelves

Mackenzie

Lena

Laptev Sea –Lena delta

Mackenzie delta

Laptev/East Siberianshelf

Deep basins:Make use ofhistorical sections

Deep basins

Central Arctic Deep basins

Hydrothermal activity on Gakkel Ridge Deep basins

Summary

Choke pointsExchange

RiversShelves

Deep water formation(NADW source)

Processstudies

Hydrothermalinputs

deepbasins

Jan 2010:Map adjusted for

GEOTRACES website

IPY

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