60 Works

Investigation of the Toxic Effects of Mercury in Landlocked Arctic Char

Niladri Basu, Benjamin Barst, Paul Drevnick, Günter Köck & Muir Derek
Data collected from landlocked char in northern Canada and Greenland indicates that 30 percent of the populations surveyed exceed toxicity thresholds for Hg in fish. Collections were conducted in cooperation with the char "core" monitoring project led by Derek Muir. The lakes sampled (Small, 9-mile, North, Amituk) span a gradient of Hg contamination, allowing for the comparison of biological endpoints in char with low Hg concentrations to char with high Hg concentrations. Endpoints relate to...

Vegetation regeneration in minerotropic rich peatlands burned between 2011 and 2016 in the Northwest Territories

Line Rochefort & Mélina Guêné-Nanchen
Vegetation data were collected in 27 burned rich peatlands along an chronosequence of fire age (2011 (n=10), 2014 (n=14), 2015 (n=4)) and 18 natural peatlands for reference during June and July 2016. Percentages of cover of bryophytes and vascular were evaluated by group and for all the species. Mean relative position to the water table was measured for fen true bryophytes. Vegetation data were collected in 12 plots within each peatlands (6 plots on hummocks,...

Ice Cap and Snow Surface Height from automatic weather stations in Canadian High Arctic

Geological Survey Of Canada And Campbell Scientific Canada Corporation
This collection of data sets is from the five automatic weather stations at Agassiz, Devon Island, Ellesmere Island Glaciers. These stations are maintained by the GSC Glaciology Section, assembled and quality controlled by Campbell Scientific Canada Corporation. Recorded variables included Ice cap and Snow surface height.

Vascular synphenology of plant communities around Cambridge Bay, Victoria Island, Nunavut during the growing season of 2014

Donald McLennan & Angulalik Pedersen
The phenology (the timing of life cycle events) of the most representative vascular species in ecosystems around Cambridge Bay (synphenology) has been recorded during the growing season of 2014, during the months of June and July. The different phenological stages of vegetative (leaf) and generative (flower and seed) development of selected plant species were documented by digital photographs. No phenology stage were attributed to the plants, only photos are provided as data. The phenological development...

CASES 0303-Beaufort Sea CTD data

Yves Gratton, Pascal Guillot, Annie Simard & Jean-Éric Tremblay
The CTD data was obtained during LEG 01 of the 2003 CASES scientific cruise #0303. This Leg was carried out from September 8th 2003 to October 15th 2003 aboard the CCGS Amundsen. There were 37 CTD casts in Leg 1. Thirty-six casts, associated to 16 oceanographic stations, are located in the Beaufort Sea research area. The following parameters were measured: temperature, conductivity and pressure (with a Sea-Bird 911 probe), oxygen (Sea-Bird 43), fluorescence (Seapoint fluorometer),...

Baseline hydrocarbons in Baffin Bay sediments, 2008-2009 (NGMP ID EC13)

Gary Stern, Karen L. Foster, Jesse Carrie & Jocelyn Bailey
Sediment cores were collected by box coring at eleven locations in northern Baffin Bay (including the North Water Polynya, Lancaster Sound, Scott Inlet, and Gibbs Fjord) during the ArcticNet 2008 and 2009 cruises. Plexiglass tubes (10 cm diameter) were pushed into the sediments; cores were between 17 and 36 cm long. The cores were extruded and sliced on the ship into sections at 0.5 cm intervals for the first 10 cm, then 1 cm intervals...

Surface and upper air charts during the Arctic extreme warm summer of 1998

Environment Canada Meteorological Service Of Canada
Synoptic charts of surface and upper air for the period of June to August 1998 were provided by CMC-MSC. These charts are part of the project "The State of the Arctic Cryosphere During the Extreme Warm Summer of 1998." The year 1998 was the warmest on record in Canada and globally, with particularly pronounced warming anomalies located over the Canadian Arctic in the spring and fall seasons. This warming had major implications for snow, ice...

Transects for pellet counts in tundra ecosystems around Cambridge Bay, Victoria Island

Donald McLennan, Cathy Anablak, Aili Pedersen, Johann Wagner & Leonard Wingnek
Observing the presence of herbivore animal droppings can give an idea of their presence as well as impact on the landscape. During the summer of 2015 animal droppings were counted in various landscapes along 30-metre lines. The transects were 30 m in length and 1 m wide. Pellets, identified to species level (caribou, muskox, ptarmigan), or to broader categories (goose/duck) were counted and recorded every metre (that is, on 1 x 1 m plots) along...

Geo-referenced digital photographs and videos with associated GPS waypoints and tracks for terrestrial ecosystem types on the northern shore of Greiner Lake, Cambridge Bay, Nunavut, 2015

Donald McLennan & Johann Wagner
Geo-referenced digital photographs and videos with the associated GPS waypoints and tracks of various terrestrial ecosystem types have been taken during the summer of 2015 on the northern shore of Greiner Lake, Cambridge Bay, Nunavut. The photographs and videos, in combination with additional GPS waypoints and tracks, characterize site, soil and vegetation characteristics of the arctic landscape. The geo-referenced photographs and videos, as well as the GPS data will be entered in a GIS software...

Field Measurements of Snow Cover Parameters for Scaling Studies, a component of the MSC 2003 AMSR-E Field Validation Campaign

Dr. Chris Derksen
One component of the field campaign was the collection of intensive snow survey data, acquired at 14 pre-established measurement sites, all of which fall within a single Special Sensor Microwave/Imager (SSM/I) grid cell. Seven of these sites correspond to meteorological measurement locations, while the remaining seven were chosen to fully characterize the dominant land cover types in the region. Four of the sites correspond to former BOREAS plot measurement locations, so detailed forest cover information...

Gridded climate data for Labrador and Northern Québec, 1948-2016

Robert Way, Philip Bonnaventure & Antoni Lewkowicz
Detailed climatological grids are needed for many applications, including permafrost prediction, ecological modelling and infrastructure planning. This study describes the creation of moderate-resolution gridded climate datasets covering the entire Labrador-Ungava region (50°-63°N) for a series of climate indices, including monthly air temperature, annual air temperature, freezing degree-days (FDDs) and thawing degree-days. Using a recently developed spatiotemporal infilling technique, temporally consistent climate grids spanning the 1948-2016 period were derived at a monthly resolution. Comparison against within-sample...

Bathymetry of a section of east end of Cambridge Bay, near the future site of the sea water intake for CHARS, Cambridge Bay, Nunavut

Donald McLennan & Exp Geomatics Inc.
Sewage water in the hamlet of Cambridge Bay is collected in storage tanks outside of buildings and subsequently dumped by tanker trucks in a system of two sewage lagoons, where it is kept for a period of time. The partially treated sewage water is then flown through a wetland and eventually discharged into the eastern arm of Cambridge Bay, in the same general area as the planned seawater intake for the CHARS aquaria. A fairly...

Land cover map along the Inuvik-Tuktoyaktuk Highway corridor

Yu Zhang
This land cover map was developed using isodata unsupervised classification method based on two SPOT 4 scenes (both acquired on 4 September 2006) and one SPOT 5 scene (acquired on 27 August 2007). The ITH corridor was classified into 14 land cover types at 20 m spatial resolution. CODE DESCRIPTIONS: 0-Water bodies or outside the map area; 1-Forest dominated by coniferous trees, mainly spruce; 2-Forest dominated by deciduous trees; 3-Shrub with sparse trees; 4-High and...

Establishing a long-term, river-based monitoring system for Arctic Char harvest in the Cambridge Bay area, Nunavut

Bobby Greenley, Brenda Sitatak, Les Harris, Tyler Jivan & Beverly Maksagak
This monitoring program will occur annually at commercial waterbodies, typically spanning from early July to late September. The initial length of the project will be seven years, reflecting given that the minimum number of years needed to collect catch-per-unit-effort (CPUE) data is five years. This will also allow for modifications to the study design and monitoring protocol. Hired monitors accompanied the fisher to the fishing site and recorded catch (number of fish) and effort (amount...

Snow Water Equivalent Data for Canada

Meteorological Service Of Canada
The data contains snow water equivalent (SWE) and snow depth measurements from snow surveys taken by more than twenty agencies at weekly, biweekly or monthly frequencies. It also contains biweekly SWE estimates at Meteorological Service of Canada snow depth observing stations. The data cover the period from the mid-1950s to the mid-1990s, with a pronounced peak in the 1976-1985 decade.

Refractory black carbon (rBC) concentrations in an ice core from Devon ice cap, Devon Island, Nunavut

Christian Zdanowicz, Ross Edwards, Wang Feiteng, David Fisher, Chad Hogan, Christophe Kinnard & Bernadette Proemse
Black carbon aerosol (BC) emitted from natural and anthropogenic sources (e.g., wildfires, coal burning) can contribute to magnify climate warming at high latitudes by darkening snow- and ice-covered surfaces, thus lowering their albedo. Modelling the atmospheric transport and deposition of BC to the Arctic is therefore important, and historical archives of BC accumulation in polar ice can help to validate such modelling efforts. Here we present a >250-year ice-core record of refractory BC (rBC) deposition...

Gastropod surveys in south-eastern Victoria Island

Josh Sullivan, Donald McLennan, Susan Kutz & Matilde Tomaselli
As the range of the muskox lungworms Umingmakstrongylus pallikuukensis and Varestrongylus nov. sp. on Victoria Island, Nunavut have recently expanded, a critical look at the distribution and abundance of their gastropod intermediate hosts is imperative for identifying regions susceptible to future parasite colonization. During July-September 2013, we sampled for gastropods at five terrestrial sites and five freshwater sites on south-eastern Victoria Island, near the hamlet of Cambridge Bay. At each terrestrial site four habitats were...

Daily Canadian Snow Inland Ice Cover Synthesis Maps

Natural Resources Canada Government Of Canada
This dataset corresponds to a next day map of snow and ice over Canada and its surrounding territories. The map is produced by blending three already validation snow and ice cover maps provided by NOAA, NASA and Natural Resources Canada. These maps have already been individually shown to have similar agreement with 500m resolution MODIS snow cover daily composite is mapped. However, NOAA 4km resolution maps are used to fill gaps due to the presence...

Baker Lake, Nunavut, Limnology Data May 2016

Richard Nesbitt
Water column profiles of temperature, dissolved oxygen, conductivity and pH were measured at 1-m intervals through the water column from the surface to near the lake bottom at six locations on Baker Lake. Water quality samples were collected for analysis of general water chemistry, trace metals, cyanide, radionuclides and phytoplankton from a variety of depths at a subset of seven sites. The seven sites included; Baker-1: Baker Lake - bay (lat: 64°16'58.9"N, long: 95°56'49.8"W), Baker-2:...

International Arctic Buoy Programme (IABP) Charts 1979-1998

Polar Science Center And Collaborators
The Participants of the IABP work together to maintain a network of drifting buoys in the Arctic Ocean to provide meteorological and oceanographic data for real-time operational requirements and research purposes including support to the World Climate Research Programme (WCRP) and the World Weather Watch (WWW) Programme. The IABP measurements include the following variables: Sea level pressure, Surface air temperature, Sea ice motion, Snow depth, Sea ice thickness, Sea ice temperatures, Ocean temperatures and Ocean...

Canadian Lake ice Database

Centre D'études Nordiques
The first version of CID contains in situ observations from 757 sites distributed across Canada, which were originally kept on digital or paper records at the Meteorological Service of Canada Headquarters and the Canadian Ice Service (CIS). The CID holds 63,546 records covering the period from ice season 1822-23 to 2000-01. An analysis of the database allows one to trace the temporal evolution of the ice networks. The freeze-up/break-up network of 2000-01 only represents 4%...

Flowering phenology observations from 23 Arctic and alpine sites from 1992 through 2015

Janet Prevey
Advancing phenology is one of the most visible effects of climate change on plant communities, and has been especially pronounced in temperature-limited tundra ecosystems. However, phenological responses have been shown to differ greatly between species, with some species shifting phenology more than others. We analyzed a database of 42,689 tundra plant phenological observations to show that warmer temperatures are leading to a contraction of community-level flowering seasons in tundra ecosystems due to a greater advancement...

IceWatch Canada database

Environment Canada, Nature Canada & Volunteer Observers
The IceWatch Program database is populated with information submitted by volunteer citizen science observers from across Canada. They collect data following a standardized protocol for annually recording the date their water body of interest freezes and stays frozen (ice-on) and the date the water body thaws and stays thawed (ice-off). Protocol training is provided by on-line instructions. Data are submitted either on-line or in paper format into a national database. The program was created by...

Preliminary freshwater sampling of selected streams in the watershed of Greiner Lake, Cambridge Bay, Nunavut.

Donald McLennan, Ioan Wagner & Melissa Lafrenière
Greiner Lake and its watershed, and therefore the properties of their waters, have a great importance to the local economy of Cambridge Bay, Nunavut, by the commercial arctic char fishery that exists here. As part of a preliminary investigation, the freshwater of streams running between lakes and ponds of the watershed, and from Greiner Lake to the ocean, have been sampled by performing measurements of pH, temperature, conductivity, TDS, as well as by collecting water...

Gridded Snow Depth and Snow Water Equivalent for North America, 1979 to 1997

Ross Brown & Bruce Brasnett
Daily analysed snow depth and estimated SWE, mean monthly snow depth and estimated SWE over North America on a 0.25 degree grid for the 1979-80 to 1996-97 snow seasons generated for use in the AMIP2 project as part of Diagnostic Sub-project 28, "Snow Cover in General Circulation Models". The methodology is described in Brown et al. (2003) and is based on the operational snow depth analysis scheme employed at the Canadian Meteorological Centre described in...

Registration Year

  • 2016
  • 2017
  • 2018
  • 2019

Resource Types

  • Dataset