Lab 7_Humidity and Atmospheric Stability 2

.docx

School

Utah Valley University *

*We aren’t endorsed by this school

Course

1010

Subject

Geography

Date

Apr 3, 2024

Type

docx

Pages

4

Uploaded by DeanRainYak21

METO 1010 Online Lab 7. Humidity and Atmospheric Stability 2 Instructions: 1) Type your answers in this Microsoft Word file and save your completed lab on your computer. Do not modify the format of the file. 2) Upload your lab on CANVAS by the due date. To upload the file, go to the course homepage and click on “assignments”. Click on the assignment that you want to submit, and on “submit assignment”. In the “file upload” box, click on “choose file” and select the appropriate file. Finally, click on “submit assignment”. Only .doc, .docx, and .pdf files are accepted. 3) In questions that require calculations, you are required to show every step of your work. 4) Proper units and terminology are always necessary. Lab Overview: In this seventh lab, you will practice with the dew point, another variable designed to measure the amount of water vapor present in the air. You will then learn about orographic lifting, one of the processes that can lift air. Orographic lifting creates condensation and precipitation on the windward side and a rain shadow on the leeward side of a mountain range. Finally, you will practice identifying the stability conditions of the atmosphere given a vertical profile of temperatures. Stability is the critical factor determining the possible occurrence of severe weather. Learning Objectives: At the end of this lab, you are expected to be able to: Compare and contrast dew point, relative humidity, and mixing ratios as variables designed to measure the amount of water vapor present in air Apply the dry adiabatic rate, the wet adiabatic rate, and the change in dew point with elevation to calculate the temperature and dew point of an air parcel forced to rise along a mountain range Identify the stability conditions (i.e., determine whether the atmosphere is absolutely stable, conditionally unstable, or absolutely stable) by comparing the environmental lapse rate with the dry and wet adiabatic rates 1
1) On a bitter cold, snowy morning, the air temperature and dew point of the outside air are both -10°C. If this air is brought indoors and warmed to 22°C, with no change in vapor content, what is the relative humidity of the air inside the home? Refer to the table in your slides to find the saturation mixing ratio. (3 points) The relative humidity is 100%, because the dew point and temperature are equal. The table says the saturation mixing ratio is 1.794 g/kg. (-10°C). For the warmed inside air (22°C), the saturation mixing ratio is 16.963 g/kg. Calculation: 1.794 g/kg / 16.963 g/kg = a relative humidity of 10.6% RH inside the home (%)= 10.6% 2) Consider an air parcel forced over a mountain. The air parcel first rises on the windward side and then sinks on the leeward side. At the base of the windward side, the temperature is 25°C and the dew point temperature is 13°C. Fill out the table below with the temperature and dew point temperature at various heights on the windward and leeward sides of the mountain. The dry adiabatic rate is 10°C/km and assume for the wet adiabatic rate a value of 5°C/km. Also assume that dew point decreases with elevation at a rate of 2°C/km and that the clouds remain on the windward side and do not extend beyond the mountain top (i.e., temperature decreases at the dry adiabatic rate on the leeward side). (5 points) WINDWARD SIDE LEEWARD SIDE Elevation (m) Temperature (°C) Dew point (°C) Temperature (°C) Dew point (°C) Sea level 25 13 30 10 500 20 12 25 9 1000 15 11 20 8 1500 10 10 15 7 2000 7.5 7.5 10 6 2
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help