Table of Contents
How do you plot the temperature on a tephigram?
The principal axes of a tephigram are temperature and potential temperature; these are straight and perpendicular to each other, but rotated through about 45º anticlockwise so that lines of constant temperature run from bottom left to top right on the diagram.
What does a tephigram show?
A BASIC INTRODUCTION Basically, a tephigram shows the temperature of a vertical profile of the atmosphere. Because a rising thermal acts as an enclosed parcel of air, it cools at a different temperature to the surrounding air.
How do you calculate LCL on a tephigram?
The LCL is located on a sounding at the intersection of the saturation mixing-ratio line that passes through the surface dewpoint temperature with the dry adiabat that passes through the surface temperature.
Where is the tropopause on a Tephigram?
tropopause: is the boundary between the troposphere and the stratosphere. It can be identified as an inflection point in the sounding where the lapse rate decreases to 2oC km-1 or less (usually at between 8 and 15 km above ground in mid-latitudes, or pressure levels of about 20 kPa).
How is wet bulb temperature determined?
Wet Bulb temperature can be measured by using a thermometer with the bulb wrapped in wet muslin. The adiabatic evaporation of water from the thermometer and the cooling effect is indicated by a “wet bulb temperature” lower than the “dry bulb temperature” in the air.
How is dew point measured?
Dew point can be calculated using the air temperature and a relative humidity value, which is measured using something called a sling psychrometer. A sling psychrometer measures relative humidity by measuring two temperatures: the actual air temperature (dry-bulb) and something called the wet-bulb temperature.
What is DB WB in HVAC?
DB = Dry-bulb; the temperature of air without taking account for evaporation/relative humidity. WB = Wet-bulb; the temperature of the air with the evaporative effect of a “wet bulb” taken into account.