IL-4 - Part IV - Stuve Lab data sheet

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Salt Lake Community College *

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1010

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Mechanical Engineering

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Apr 3, 2024

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Upper Air Diagrams, Lapse Rates, & Stability NAME _Daleya Wekluk Meteorologists use upper air diagrams to diagnose moisture in the atmosphere and stability to help predict the weather. Today you will be creating an upper air diagram and determining what it says about the stability of the atmosphere. 1. Using the data below, plot the Temperature and Dewpoint on the attached blank upper air diagram. Make sure it is clear which line is T and which is Td. 2. Using the Height and Temperature data in the chart below determine the change (∆) of Temperature and Height in each layer. Use these numbers to calculate the lapse rate: Lapse Rate = ∆ T/∆ H 72233 LIX Slidell Muni Observations at 12Z 30 Jan 2014 ----------------------------------------------------------------------------- PRES HGHT TEMP DWPTRELH MIXR DRCT SKNT ∆ T ∆ H ∆ H Lapse Rate mb m C C % g/kg deg knot C m km C/km ----------------------------------------------------------------------------- 1000.0 209 -3.5 -19.5 28 0.82 90 18 950.6 610 -0.7 -32.8 7 0.26 135 10 _2.8 401_ .401 6.98_ = S 897.0 1077 4.0 -45.0 1 0.08 47 4 _4.7 _467 _.467 _10.06 = S 850.0 1514 3.4 -23.6 12 0.67 310 8 _-.6 _437 _.437 _-1.37 = S 787.1 2134 1.5 -24.1 13 0.70 295 16 _-1.9 _620 .620 _-3.06 = S 757.9 2438 0.3 -23.4 15 0.77 290 22 -1.2_ 304_ _.304 _-3.95 = S 700.0 3072 -1.7 -28.7 11 0.51 250 27 _-2 _634 _.634 _-3.15 = S 649.9 3658 -3.2 -37.2 5 0.24 265 27 _-1.5 _586 _.586 _-2.55 = S 600.0 4288 -6.3 -40.3 5 0.19 260 26 -3.1_ _630 .630_ _-4.92 = S 555.4 4877 -11.0 -42.5 6 0.16 260 27 -4.7_ _589 _.589 _-7.98 = CU 500.0 5680 -17.5 -45.5 7 0.13 255 34 -6.5_ _803 _.803 _-8.09 = CU 400.0 7310 -29.7 -49.7 13 0.10 245 52 -12.2 _1630_1.63 _-7.48 = CU 351.0 8230 -37.4 -45.8 41 0.18 235 66 _-7.7 _920 _.920 _-8.37 = CU 300.0 9310 -42.3 -62.3 9 0.03 235 88 _-4.9 _1080_1.08 _-4.54 = S 250.0 10520 -48.3 -70.3 6 0.01 235 100 -6_ _1210_1.21 _-4.96 = S 200.0 11980 -50.7 -79.7 2 0.00 240 91 _-2.4 _1460_1.46 _-1.64 = S 150.0 13830 -57.9 -84.9 2 0.00 240 84 _-7.2 _1850_1.85 _-3.89 = S 100.0 16310 -67.7 -87.7 4 0.00 260 58 _-9.8 _2480_2.48 _-3.95 = S 3. The dry adiabatic lapse rate (DALR) is about -10 C/km and the wet or saturated adiabatic (WALR) is about -6 C/km. How do your lapse rates compare to these numbers? Are they less, greater, or in between? The majority of the lapse rates are positive or above -6 meaning they are stable. There are 4 out of the 17 ELRs that are conditionally unstable.
4. What does this tell you about the stability of the atmosphere? The environment is mostly stable with these measurements.
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