20 May, 2000

Fahrenheit to Celsius


May 20, 2000

Daily Data:

Around 11:00 PM the air temperature reading was 39.0 degrees Fahrenheit taken from the USCGC Healy docked in St. John's. What is this temperature reading in degrees Celsius?

USCGC Healy Facts

From the USCGC Healy (WAGB-20) brochure:

"The science community provided invaluable input on lab lay-outs and science capabilities during design and construction of the ship. At a time when scientific interest in the Arctic Ocean basin is intensifying, HEALY enhances U.S. Arctic research capabilities substantially.

As a Coast Guard cutter, HEALY is also a capable platform for supporting other potential missions in the polar regions, including logistics, search and rescue, ship escort, environmental protections, and enforcement of laws and treaties."

Dear Everyone,

As the locals say, if you don't like the weather in St. Johns, wait 5 minutes. It will change. Aside from some fog and chilling winds on my Signal Hill hike to Cabot Tower, we have been fortunate to have plenty of sunshine. In town, the daffodils and tulips are blooming and we are reminded of springtime. Compared to our Arctic Healy experiences, it feels beautifully warm to us. Once the sun sets, the temperature quickly drops.

How is temperature in degrees Fahrenheit translated to degrees Celsius? I asked Robert Wolfe, a Research and Development Officer, from Ottawa, Ontario, Canada this question. Robert supplied me with the following information: "Enter this table with temperature Fahrenheit, F; Celsius (centigrade), C; or Kelvin, K; and take out the corresponding readings on the other two temperature scales.

On the Fahrenheit scale, the freezing temperature of pure water at standard sea level pressure is 32 deg, and the boiling point under the same conditions is 212 deg. The corresponding temperatures are 0 deg and 100 deg on the Celsius scale and 273.15 deg and 373.15 deg, respectively, on the Kelvin scale. The value of (-) 273.15 deg C for absolute zero, the starting point of the Kelvin scale, is the value recognized officially by the National Institute of Standards and Technology (NIST).

The formulas are:

C = 5/9 (F - 32 deg) = K - 273.15 deg

F = 9/5 (C + 32 deg = 9/5 K - 459.67 deg

K = 9/5 (F + 459.67 deg) = C + 273.15 deg

Compare the air temperature where you live with our air temperature in St. John's, Newfoundland, Canada in both degrees Fahrenheit and Celsius. Then compare it to the air temperature we experienced on the Healy in my journal of May 13, 2000 "Saturday Notes".

Data on ice core 11A of April 19, 2000 follows.

Best regards,

Sandra Kolb

Core 11A level ice first testing floe

19-April-00 Total length 41 cm

decimal degrees degrees minutes

Latitude 64 04 62

Longitude 61 29 59

Brine volume for -2>T>-22.9

Brine volume coefficients:

F1(T) COEF. -4.732 -22.4500 -0.640 -0.011

F2(T) COEF. 8.90E-02 -0.01800 -0.001 0.000

Comments: Time 1322 GMT, White band at 4-5cm, diameters are irregular

depth cm temp C salinity weight g

05 -2.7 8.9 250.60

15 -2.5 6.1 305.02

25 -2.2 4.4 337.02

35 -1.9 6.1 352.24

length mm diameter mm density

76.15 69.05 0.879

89.72 69.15 0.905

97.2 69.4 0.917

99.4 70.3 0.913

RHOI bine vol air vol

0.9174 0.1521 0.06226

0.9174 0.1161 0.02828

0.9173 0.0968 0.01290

0.9173 0.1561 0.02352

porosity strength mpa strength psi

0.2143 0.178 25.8

0.1444 0.237 34.4

0.1097 0.283 41.0

0.1796 0.172 25.0

average brine vol 0.1216

average strength mpa 0.226

average strength psi 32.8

Rock formation on Signal Hill. Can you see a profile of a dog's face? photo by Sandra

View from Signal Hill. photo by Sandra

Pathway up Signal Hill to Cabot Tower. photo by Sandra

View of from pathway going up Signal Hill. photo by Sandra

Cabot Tower on Signal Hill, St. John's. photo by Sandra

The USCGC Healy as seen from Signal Hill. photo by Sandra

Fortification at Signal Hill. photo by Sandra

Along the pathway at Signal Hill. photo by Sandra

The lighthouse as seen from Signal Hill. photo by Sandra

The USCGC Healy docked at pier 17 in St. John's, Newfoundland, Canada.

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