Churchill RCT-2

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General Information

Created: 2014-01-09 14:45:47
Modified: 2014-02-11 15:29:46

Active: No
Country:Canada
Site:Churchill Hudson Bay
GTN-P:CA 80
TC-Code:RCT-2
Responsible Countries: Canada,
Timezone:UTC/GMT -06:00 hours
Vegetation Type:Shrub Tundra
Responsible Person:Barry Goodison

Churchill A,  Station No. 5060600

58 44 N  94 03 W

Churchill A is about 2km west of RCT-1, on the same rock ridge, but among taxiways, and about 60 from the nearest hangar.

This hole does not reach to a zero amplitude depth.  Mean annual ground temperature for the Year 2000 at 15m was -1.89C, with an annual amplitude of 1.8C.

MAAT at the site was -5.7C for the year 2000.

Mean snow depth for 2000 was 85mm.

MAAT for 2000 at Churchill A was -4.9C
and mean snow on the ground at month end was 162mm.

Range (if applicable) of mean annual ground temperature over observation period (°C)

The hand-held balance bridge measurements gave a range of -2.6 to -3.6C of MAGT at 15m for the period 1973 to 1983.

The datalogger program from 1986 through 1995 gave a range of -5.2 to 1.5 for daily temperatures and a small range of mean annual ground temperatures around -2.2C

 

 

AIR TEMPERATURE AND SNOW COVER THICKNESS/DENSITY MEASUREMENTS AT THE BOREHOLE SITE (indicate frequency of observations):

Air temperature: Yes [X] No [ ]    Snow thickness: Yes[X] No[ ]   Density: Yes [ ] No[X]

Depth:15 m
Drilling Angle:90 °
Deepest Sensor:15 m
Drilling Method:Sept. 20-23, four sites were drilled and installed in four days.
Date Drilled:20. Sep 1973
Type:Airport service road
Distance From Road:40 m
Type:Anthropogenic heat/cold source are the Churchill airport main runway, located 700m East of the site, and a railroad, later road that runs by 40m North of the site.
Distance From Heat:300 m
Other Disturbance:Anthropogenic: railway
Distance From Heat:40 m
Aspect:315.5 °
Permafrost Zone:Continuous
Vegetation:The vegetation is a boreal forest/fen complex. Sedges and Labrador tea are common, with other very small shrubs. The nearest black spruce/larch patch is about 150m away to the southwest.
Landform:This is coastal Hudson's Bay. The land has been uplifting continually since the retreat of the continental glacier some 10,000 years ago. All parts of this coast were part of the sea at some time in recent geological history.
Lithology:This is a hard rock site, with the hole entirely in hard rock (recorded as quartzite), seemingly with few fissures to migrate water. The installation report shows sand and silt layers for the entire 15m of drilling.
Morphology:Local relief consists of rock elements on the order of 1m with a horizontal scale of a few metres to several 10s of metres. Soil, both sandy silt and organics, fill low parts in the rocks and becomes a continuous cover about 1km to the south (away from Hudson's Bay). The well itself is on a near-flat and level place on the rock outcrop, with horizontal extent of about 50m, and littered with scattered rocks from 20cm to 2m in dimensions. This is uplifting Hudson Bay coast, in the mouth of the Churchill River, which flows Northward some 6 km to the West of the site. There are deep layers of beach sands or riverine materials. The installation report on a 15m holes showed: 0 to 0.8m Sedge peat 0.8 to 2.4m clayey silt with a few stones 2.4 to 4.3m large rock fragments and sand 4.3 to 15.2m medium sand with some gravel (scattered stones).
Description:Level, with gentle undulations in the rough rock surface. Steep slope to the sea begins 250m to the North, very gentle slope to the south includes the site.
Access Timeseries
Bibliographic References
Granberg, Hardy B., Dec. 1985. Equipment installation for permafrost climate project at Churchill, Manitoba. Final Report, Contract Serial No. OSE85-00156.
Brown, R.J.E., 1978. Influence of climate and terrain on ground temperatures in the continuous permafrost zone of Northern Manitoba and Keewatin District, Canada. Proc. Third International Conference on Permafrost, Edmonton, Alberta, Vol 1, pp. 15-21 (NRCC 17085)

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Gallery
Map

Longitude:-94.081 °
Latitude:58.73511111 °
Elevation:14 m
EPSG:4326
Meta Data Completeness
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