# CU-Boulder ATOC 1070 - Lab11 (2 pages)

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## Lab11

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## Lab11

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Atoc 1070 - Weather and the Atmosphere Laboratory
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Sarah Rose Lab 11 Determining Winds by Tracking Balloon Section 8 Group Liz Jeannie Mike Question 1 Because of the bad weather we weren t actually able to launch any balloons but if I had to guess 4 potential aspects of this activity that would produce error that first one would be the observation of the balloon at the 30 second intervals Error could arise from this because between the observation and writing down the observed height the balloon could have gained more altitude this would affect the lab because it would suggest the balloon is rising faster then it is Another place for error could come from the person recording the azimuth and elevation angle again because all the data can t be recorded simultaneously the angle and azimuth reading might not represent the data for the exact height the balloon is Again because we didn t actually do this lab I m not sure if this could be true or not but that fact that we are depending on the balloon to be rising at a constant rate could be effected but vertical winds if it is an especially windy day This would effect the lab because the balloon would be gaining altitude faster then normal and maybe not be as likely to move also the horizontal winds Also potential error could come from object surface observations if our group didn t completely agree on the balloons location we could have less accurate readings Question 2 At 1840 meter ASL the weather balloon on April 12 2013 is moving at 2 1 knots and 233 degrees SW In Denver at the altitude of 1826 meters ASL the readings are 75 ENE degrees and 8 knots The winds in Boulder about 2 knots are more calm then the winds in Denver 8 knots The speeds and directions are both different Denver s winds are coming from the ENE and Boulder s winds are coming form the SW This might be due to the warm and cool front present over Colorado that day Because Boulder is located NW of Denver it was experiencing different strength direction of winds I as difficult to find any archived data

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