Study of Sea Ice Biogeochemistry (snow depth, ice thickness, ice salinity, dissolved inorganic carbon, total alkalinity, biomass, under ice currents) Comparing a Thick First Year Ice Site, and a Thinner Polynya Site Near Cambridge Bay ...
The selected sites were both on level first year ice: one approximately 5 km to the east of the Finlayson Islands, outside of the polynya where we expected weaker currents and thick first-year ice, and one directly between the islands, in the polynya where we expected strong currents and thin first-...
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| Format: | Dataset |
| Language: | English |
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Canadian Cryospheric Information Network
2022
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5884/13263 https://www.polardata.ca/pdcsearch?doi_id=13263 |
| Summary: | The selected sites were both on level first year ice: one approximately 5 km to the east of the Finlayson Islands, outside of the polynya where we expected weaker currents and thick first-year ice, and one directly between the islands, in the polynya where we expected strong currents and thin first-year ice. Sampling was conducted over a 6-day period between 4 and 10 May 2019, with both sites visited on three days (4, 7, and 10 May). On the first sampling date, inverted tilt current meters (Lowell Instruments TCM-1 Current Meter) were installed at both sites to measure velocity (units: cm s-1) in 1-minute intervals. Sea ice sampling was conducted at the sites using a Kovacs Mark II 9-cm diameter coring system. Snow depth (units: cm) was measured with a meter stick prior to collection; ice thickness (units: cm) was measured after core collection with a measuring tape. One core was collected at each site on each day for temperature and salinity profiles. Temperature (units: degrees C) was measured using a ... : This study is about the carbonate chemistry of sea ice. Sea ice carbonate chemistry is thought to play an important role in global carbon cycles (i.e the uptake and storage of carbon dioxide from the atmosphere) but exactly how important is subject to considerable debate. One of the reasons for this uncertainty is that there is considerable variability in the reported total alkalinity (TA) to total inorganic carbon (TIC) ratio between different studies. Usually, this disparity is explained by spatial variability - different sea ice sites experience different physical, biological, and chemical characteristics, leading to large variations in the TA:TIC ratio of sea ice. To study variability in sea ice TA and TIC, we selected a site about 30 km west of Cambridge Bay (Iqaluktuttiaq), Nunavut. The site is a known location of an "invisible polynya", a location where strong under-ice currents lead to thinner ice and potentially higher ice algae biomass. We used two sites - one outside of the polynya, and one within ... |
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