1 / 15

Climate, ocean circulation & sea level

Climate, ocean circulation & sea level. SAMS Main elements Leader. Arctic and boreal seas in a rapidly changing climate Past and present variability in the northern limb of the MOC (WP 1.5) Effect of climate change on the Arctic marine system (WP 1.6)

seth
Download Presentation

Climate, ocean circulation & sea level

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Climate, ocean circulation & sea level SAMS Main elements Leader • Arctic and boreal seas in a • rapidly changing climate • Past and present variability in the northern limb of the MOC (WP 1.5) • Effect of climate change on the Arctic marine system (WP 1.6) • Ray Leakeyray.leakey@sams.ac.uk Theme 1

  2. Past and present variability in the northern limb of the MOC Sediment palaeo-record to inform on history Meridional Overturning Circulation

  3. The effects of changing sea-ice on Arctic marine ecosystem and biogenic carbon cycle Arctic is warmer and less saline = less extensive and thinner ice What are the consequences for Arctic food webs and carbon flux ?

  4. Air-Sea Exchange Microbial Activity Light & Nutrients Grazing C:Chl ratio Nutrient Regeneration Carbon Flux Carbon Export Key Processes Where Further Understanding Required for Modelling Arctic Carbon Flow Sea-Ice Microbial Loop Primary Production Higher Predators Zooplankton Benthos

  5. WP 1.5 & 1.6 Field Observations and Experiments • Two research cruises (2008 and 2010) to marginal ice zone north of Svalbard: • Observations: • Physical parameter – sea-ice and water column • Sea-ice, pelagic and benthic communities • Sea-ice, pelagic and benthic biogeochemical parameters • Sediment core palaeoceanographic record (Piston coring) • Experiments: • Metazoan versus protozoan grazing • Temperature/nutrient co-limitation of microbial production • Benthic boundary layer nutrient fluxes using in situ landers • Comparison of open, marginal ice zone (MIZ) and ice covered waters • as in 2008 • 2009 Greater emphasis on sea-ice processes, piston coring and early summer processes

  6. Leg 1: UK to Longyearbyen (Svalbard) Duration: Approx 7 days Possible Dates: 31 May to 6 June Activities: Travel to Svalbard Underway continuous water supply sampling Occasional shallow CTD/Niskin deployments Deep water benthic lander test Personnel exchange at Longyearbyen

  7. Leg 2: Longyearbyen to North Svalbard Sea-Ice (Return) Duration: Approx 14 days Possible Dates: 7 June to 20 June Location: 80.00 to 80.30 N and 10.00 to 16.00 E Activities: Take JCR as far into sea-ice north of Svalbard as possible Surface sea-ice sampling and equipment deployment Under-ice sampling and equipment deployment using divers CTD/Niskins, nets, benthic sampling from ship Return to Ny Alesund and/or Longyearbyen to exchange personnel

  8. Leg 3: Longyearbyen to North and North-West Svalbard Shelf Duration: Approx 10 days Possible Dates: 21 June to 30 June Location: 80.00 to 80.30 N and 10.00 to 16.00 E (perhaps as far as 22.00 E if ice free) Activities: Take JCR to sea-ice edge and open water N & NW of Svalbard CTD/Niskins, nets, benthic sampling from ship Benthic lander deployments AUV & physics instrument deployments Return to Ny Alesund and/or Longyearbyen to collect UCORS Staff

  9. Leg 4: Longyearbyen to NW Shelf/Molloy Deep/NE Greenland Shelf Duration: Approx 11 days Possible Dates: 1 July to 11 July Location: 71.00 to 82.30 N and 10.00 E to 10.00 W (i.e. onto Greenland shelf if ice allows) Activities: Take JCR to NW Svalbard shelf and Molloy Deep AUV & physics mooring instrument deployments on NW Shelf Piston Coring on NW Shelf and Molloy Deep (4 days) Possible CTD/Niskins, nets, benthic sampling in cold water off Greenland Return to Longyearbyen – Demobilisation ? UKCORS staff and others depart ship

  10. Leg 5: Longyearbyen to UK Duration: Approx 7 days Possible Dates: 12 July to 18 July Activities: Travel to UK Demobilisation in UK?

More Related