Question #1 - Example D: June, midnight and overcast. Asphalt pavement at temperature 18oC and cloud with a base temperature of 2oC. (2.5 marks)
Solve the equations to determine an answer for EXAMPLE D:
Q = Click or tap here to enter text. W m-2
aQ = Click or tap here to enter text. W m-2
M out = Click or tap here to enter text. W m-2
M in = Click or tap here to enter text. W m-2
Rn = Q - aQ - Mout + Min = Click or tap here to enter text. W m-2
Question #2 - Example E: December, midday, cloudless and very dry so that downward long wave radiation (Min) is insignificant. A newly snow covered surface at a temperature of -5oC. Assume a value of Q = 350 W m-2 (2 marks).
Solve the equations to determine an answer for EXAMPLE E
M in = 0 (given) W m-2
Question #3 - Using the net radiation formula and the data collected outside, compute the net radiation over the grass covered surface (2.5 marks)
Calculations based on the Outside Data:
Mout=36.3 degree celsius
Min= 8.3 degree celsius
Over Grass: Surface Type Insolation - "Q" (W/m^2)Grass 466.1Concrete 97.7
Reflected - "αQ" (W/m^2) grass113.3
concrete 36.0
Question #4 - Using the net radiation formula and the data collected outside, compute the net radiation over the concrete sidewalk. (2.5 marks)
Over Concrete:
imporant info( 30.2 degree celsius)
sky=13.3 degree celsius)
Over Grass:
With reference to the Net Radiation Equation, answer the following questions.
Click or tap here to enter text.
Global Perspective
Navigate to the following NASA website on Net Radiation:
Read the short description for the map series on the page.
Press the ‘play’ button on the left-hand side of the image and the movie will progress through data from 2006 until the most recent data in 2022. The area in orange indicates the region of positive net radiation, whereas the area in purple indicates the area of negative net radiation. Watch the area covered by the orange and purple areas. Think about what is happening to create this pattern?
In the movie bar under the graphics that shows the progression of the images, you are able to slide the orange circle in the white bar (left or right) to select a specific month during the year. Slide the orange circle so you are looking at the data for January 2016.
Now move the slider to July of 2016
(click the corresponding checkbox for your answer)