Please enter your Name before beginning (Last Name, First Name):

And your email address:

Next, go to the Current Weather & Climate page at http://geography.uoregon.edu/weather/ 

Under the section Basic Information, click on the link "Willow Cr. 139m".  The page that will come up is a plot of data collected at an automated weather station at Willow Cr., just southwest of Eugene.  (Note, if this link fails to open, try this one: [Eugene Airport 111m].)

Question 3-1:  The top panel shows the variation of the air temperature (red), dew point temperature (green), and relative humidity (blue).  Describe the shapes of the air temperature and dew-point temperature curves.  Does temperature vary more on from hour to hour or from day to day?  What about dew point temperature? 

Question 3-2:  Describe the relationship among air temperature, dew point temperature, and relative humidity?  Are there any trends in these variables from one day to the next?

Question 3-3:  The second panel panel shows wind speed (solid purple line), instantaneous wind maxima (gusts, dashed purple line) and direction the wind is blow (orange dots)  Describe the variation of wind speed during the day.  When is it faster, and when is it slower?  Describe the day to day variations in wind direction.

Question 3-4:  The bottom panel shows incoming solar radiation (K↓).  Take a look at all four panels.  Describe any discontinuities or abrupt changes in the plots.  Is there any relationship between temperature, relative humidity (or dew point temperature), wind speed or direction, and the occurrence of precipitation (if any), and solar radiation?  One way to answer this is to compare air temperature and solar radiation to infer cloudiness, and then look at precipitation and wind.  (Note that the span of time represented could be rather boring.  You could look at longer time intervals by clicking on one of the links at the top of the page.)

When you are finished, and all answers have been completed, click on the "Submit" below to send us the exercise.  If you receive an error message, check to make sure that you've answered each question, and that your name has been filled in, and then click on "Submit" again.

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