Grant: Research Tools and Instruments - Category 1 (<$150,000)
University of Manitoba
$123,825.00
Ice-tethered profiling from the land-fast ice on the Arctic shelves
EF 2014-15
Résumé
The requested equipment is a pair of ITP (Ice-Tethered Profiler) CTD (Conductivity-Temperature-Depth) and turbidity/chlorophyll fluorescence/CDOM (Colored Dissolved Organic Matter) under-ice profilers. The ITPs are capable of frequent (hourly) vertical CTD and optical profiling between the sea floor and water-ice interface with vertical resolution of ~2-5 cm. Such profiling data are indispensable for assessing the intensity of the vertical turbulent exchange beneath the ice cover. The ITPs are expected to be used for three NSERC-DG research projects, entitled ""Vertical mixing below the land fast ice on the Arctic shelves: Efficiency and driving mechanisms"", ""Role of radiative forcing on the sea ice melt-growth cycle in a changing Arctic environment"" and ""Dynamic and thermodynamic processes of snow covered sea ice"". The requested equipment will replace existing unreliable and inappropriate equipment to conduct frequent and long-lasting autonomous profiling of water temperature, salinity, and optical characteristics below the land-fast ice. The existing loaned equipment designed for open ocean applications is unsuitable for operations from land-fast ice. In contrast, the ITP is only the equipment specifically designed for deployment, frequent and long-lasting autonomous CTD and turbidity/chlorophyll/CDOM profiling below the ice. The two ITP profilers separated by ~15-20 km are deployed from the land-fast ice in combination with Acoustic Doppler Current Profilers (ADCP) for ~ 7-month from October/November to May/June. The field observations take place at the Great Whale River Estuary in Hudson Bay, Resolute Passage and Cambridge Bay in the Canadian Archipelago and in Greenland. Every year, ITPs and ADCPs are reallocated between different locations. This project will clarify the role of vertical mixing on the different Arctic shelves for different environmental conditions. This will significantly improve our understanding of regional changes in vertical mixing and mechanisms responsible for instability below land-fast ice on Arctic shelves with potential implications for Arctic modeling. This is of particular importance for the Canadian Arctic shelf where the extensive exploration of oil and gas is expected.
Programme
Research Tools and Instruments - Category 1 (<$150,000)
Bénéficiaire
Emplacement
Manitoba, Canada
Type de bénéficiaire
Academia
Type
Grant
Source
NSERC's Awards Data
Tel que publié
Application id
472340-2015
Name nom
Dmitrenko, Igor
Department département
Environment and Geography
Organization id
19
Institution établissement
University of Manitoba
Province en
Manitoba
Province fr
Manitoba
Country en
CANADA
Country fr
CANADA
Fiscal year exercice financier
2014
Competition year année de concours
2015
Award amount
123825
Program id
EQPEQ
Program name en
Research Tools and Instruments - Category 1 (<$150,000)
Program name fr
Outils et instruments de recherche - catégorie 1 (<150 000$)
Group en
Discovery grants programs
Group fr
Programmes de subventions à la découverte
Committee code
1506
Committee name en
Geosciences
Committee name fr
Géosciences
Area of application code
402
Area of application group en
Environment
Area of application group fr
Environnement
Area of application en
Oceans, seas and estuaries
Area of application fr
Océans, mers et estuaires
Research subject code
4600
Research subject group en
Oceanography
Research subject group fr
Océanographie
Research subject en
Oceanography
Research subject fr
Océanographie
Partie
1
Nb partie
1
Application title
Ice-tethered profiling from the land-fast ice on the Arctic shelves
Keyword
NSERC
Application summary
The requested equipment is a pair of ITP (Ice-Tethered Profiler) CTD (Conductivity-Temperature-Depth) and turbidity/chlorophyll fluorescence/CDOM (Colored Dissolved Organic Matter) under-ice profilers. The ITPs are capable of frequent (hourly) vertical CTD and optical profiling between the sea floor and water-ice interface with vertical resolution of ~2-5 cm. Such profiling data are indispensable for assessing the intensity of the vertical turbulent exchange beneath the ice cover. The ITPs are expected to be used for three NSERC-DG research projects, entitled ""Vertical mixing below the land fast ice on the Arctic shelves: Efficiency and driving mechanisms"", ""Role of radiative forcing on the sea ice melt-growth cycle in a changing Arctic environment"" and ""Dynamic and thermodynamic processes of snow covered sea ice"". The requested equipment will replace existing unreliable and inappropriate equipment to conduct frequent and long-lasting autonomous profiling of water temperature, salinity, and optical characteristics below the land-fast ice. The existing loaned equipment designed for open ocean applications is unsuitable for operations from land-fast ice. In contrast, the ITP is only the equipment specifically designed for deployment, frequent and long-lasting autonomous CTD and turbidity/chlorophyll/CDOM profiling below the ice. The two ITP profilers separated by ~15-20 km are deployed from the land-fast ice in combination with Acoustic Doppler Current Profilers (ADCP) for ~ 7-month from October/November to May/June. The field observations take place at the Great Whale River Estuary in Hudson Bay, Resolute Passage and Cambridge Bay in the Canadian Archipelago and in Greenland. Every year, ITPs and ADCPs are reallocated between different locations. This project will clarify the role of vertical mixing on the different Arctic shelves for different environmental conditions. This will significantly improve our understanding of regional changes in vertical mixing and mechanisms responsible for instability below land-fast ice on Arctic shelves with potential implications for Arctic modeling. This is of particular importance for the Canadian Arctic shelf where the extensive exploration of oil and gas is expected.
