MONTHLY BULLETIN: CANADIAN UPPER AIR DATA.
DEPARTMENT OF TRANSPORT TORONTO (ONTARIO) METEOROLOGICAL BRANCH
Pagination or Media Count:
Altitude is entered in geopotential meters or geopotential kilometers above m.s.l. Temperature is entered in degrees and tenths Celsius. Interpolated temperature values for levels occurring within a stratum of missing data and extrapolated temperature values for levels to which data have been extrapolated beyond the terminating level of the ascent are entered to the nearest whole degree. Potential temperature is entered in whole degrees Kelvin. Pressure is entered to the nearest whole millibar. When the pressure at the freezing level or the maximum wind level exceeds 999 mb., the thousands digit is omitted. Wind direction is entered as the number of degrees from true north . 000 for wind direction represents calm conditions. Wind speed is entered to the nearest whole meter per second . 00 for vector mean wind speed indicates a speed of less than 0.5 meters per second. Author