Ground Temperatures in Labrador

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Publisher’s version / Version de l'éditeur:

Technical Note (National Research Council of Canada. Division of Building Research), 1956-09-14

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Ground Temperatures in Labrador

Crawford, C. B.

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DIVISION OF BUILDING RESEARCH

NATIONAL RESEARCH COUNCIL OF CANADA

TECIHlN ][CAlL

NOT FOR PUBLICATION

NOTJE

No.

214

FOR INTERNAL USE

PREPARED BY C.B. Crawford

PREPARED FOR

CHECKED BY

Iron Ore Company of Canada

APPROVED BY RFL

Sep,.t 14, 195.'.:,

SUBJECT _{Ground Temperatures}

in Labrador

In August 1955 a preliminary report on ground temperature

measurements in Labrador was prepared and distributed for comment

on a limited basis. In September 1955 the temperature recording

instruments were checked and substantial errors in the readings

ｷｾｲ･ found. The instruments were then adjusted to eliminate these

errors. In August 1956 a further check was made on the

instru-ments and although most readings were satisfactory, several of the

instruments were again reading incorrectly. No adjustment was made

to the instruments at that time.

Corrected monthly mean ground temperatures at Knob Lake have

been computed. These are shown in the accompanying table from

October

1954

to July

1956.

Readings obtained prior to the

relo-cating of the instruments in

1954

are not included since the

information obtained during the first year of operation was not

complete. Four figures are attached which show the variation in

air temperature! snow cover and monthly mean ground temperatures under natural snow cover and under a cleared roadway.

This information is prepared for interim use and a final report on these measurements will be prepared when observations

during three winter periods are available. For purposes of this

investigation enough information will have been obtained by the

summer of

1957;

therefore unless continuing temperature measurements

are desired by the Iron Ore Company, the instruments will be

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Corrected Monthly Mean Ground Temperatures at Knob Lake

e

Cleared Road Snow Cove.r

Depth _2'

₄

9 ₆9 ₉9 12' _12' 2'

4'

6' 8' 10' 111072 1924 41 07 Octo 36 02 3707 3908 4104 4107 400 9 3701 40 02 4107 41 08 4101 Nov .. 2802 3104 3403 3607 3801 3902 3002 3208 3700 3702 3806 39.7 Deco 1206 2003 2608 3202 34 02 3201 27 .. 0 3300 3309 36 00 3606 1922 Jano 1702 1808 2201 2901 3109 33.8 3104 3204 3403 3406 Febo 1301 1200 1900 2606 30 03 3204 2902 30 08 3301 3303 Mar0 207 705 11 .. 9 2003 2601 31 .. 6 2608 2809 32 03 3301 Apr0 2207 20 06 2006 2203 22 00 3004 2800 28 .. 9 3102 32 02 May 38 .. 3 34 00 3009 2906 2901 30 07 3302 3008 31.9 3103 32.0 32 00 June _.5203 4808 4100 3203 31 00 3103 4803 4004 33.8 31.7 32 00 3200 July 5600 5204 4609 3803 3200 3104 5107 4702 4009 3706 3407 3308

.Ugo

5408 5202 4809 42 .. 8 3700 3201 2204 2008 4602 44.0 4308 40 00 Septo ₄₄₀₉ 46 01 4207 4304 3902 3208 47.6 4803 4702 4208 4309 4200 Oct .. ₃₂₀₉ ₃₆₀₇ 38 06 3902 3803 3609 3808 40.,2 41 .. 9 41.8 4102 4101 Nov .. 29 .. 0 3108 3404 3209 36 00 3600 34.9 3208 3902 3806 3809 39 00 Deco 1608 22 02 2809 3303 3401 3409 3107 3300 3608 3602 3701 3702 1926 Jan .. 805 1309 2004 2808 3207 3309 2804 3002 3201 3407 3208 3601 Feb. 109 8.. 0 14.. 2 2306 3002 3206 2606 2804 34 .. 2 3303 34.. 4 3308 Mar0 302 700 12.. 4 2002 2700 31 .. 6 26 02 2207 3304 3202 3402 33 02 Apr0 2105 1909 2002 2300 2800 3104 2802 2700 3201 3107 3205 32 06 May ₃₁₀₉ 2908 2909 2900 2902 3108 3101 2908 3206 32 02 3202 32 02 June ₄₄₀₄ 3806 3402 3105 3008 3104 3604 3100 3509 3108 3205 3208

.UI

Y 2208 4707 4206 3500 3106 3104

48 ..

2 42 09 4001 3603 3408 3301

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·

,

Corrections to Readings Supplied by 100000

Cleared Road

Depth. _2' _4' 6' 9' 121 ₁₅11

Oct. _'54 - Septo ｾＵＵ +0.7 +0 .. 9 +1.0 +001 "'2.0 +0 .. 6

Oct. _'55 - Dec. _'55 0 0 0 0 0 0

Jan. _'56 -0,,8 0 0 0 +1.9 +0.7

Feb .. '56 - Aug .. u56 -1.,6 0 0 0 +3 .. 8 +1.4

Snow Cover

Depth 2' 4' 61 8' ＱＰｾ _11'-9

e

Oct. _'54 - Sept .. a55 +2.8 +4.0 +3.0 +004 +0 .. 3 +1.3

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Ground Temperatures in Labrador

NRC Publications Archive

Archives des publications du CNRC

TECIHlN ][CAlL

NOTJE

No.

1954

1956.

1954

1957;

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