Phsc 205 Exan 3 ch 7-9 spring 2020 phsc 205 190

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Dec 6, 2023

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Phsc 205/190 Exam 3 Spring 2020___________Johnny Benavidez________________ 100 points Ch 7-9 Print name (first, last) The exam is open book/notes, but you may not get help from anyone else (either in the flesh or on the internet). Do not copy or photograph this exam, and do not post it anywhere on the internet. A take-home open book/notes exam is always very strongly predicated on honor, the personal honor and integrity of the person taking the exam. I trust that all of you will do the exam in an honorable fashion. Good luck. Type answers in Word, “Save As” with your name as part of the file name, then email it to me. lovett@lakemichigancollege.edu 1. Refer to the map of sea surface temperatures (SST) along the equator in the Pacific Ocean. a. What phase of the Southern Oscillation does this show: normal, La Nina, or El Nino? [1] Justify your answer. [2 El Nino because the water temperature is warmer. The water is going towards South America b. Would the Trade Winds be strong or weak at this time? [1] Weaker c. What general weather conditions would you expect in New Guinea and northern Australia? [2] Dry warmer weather d. What general weather conditions would be expected in the southeastern U.S.? [2] Wet and cool 2. Decode the station model with proper units. [11] a. Wind direction South east b. Wind speed 0-4 knots c. Temperature 28 F d. Dew point 10 F e. Barometric pressure 1008 mb f. Visibility ¼ miles 28 10 008 1/4
3. What are the two important conditions that must be present in a source region for a specific air mass to develop? [4] Must have a certain temperature and humidity that stays a certain way for a good amount of time. 4. Assume the weather at your house on May 18 th is: mostly to completely cloudy, temperature of 22 , dew point of 20 , pressure of 1002.4 mb, and a south wind of 3-5 mph. A cold front will pass by overnight. How will each of the following weather characteristics change when the cold front passes by? [5] Sky conditions (cloudiness) -- Cumulus clouds would form Temperature -- Dew point -- Lowers quickly Pressure –starts to decrease Wind speed – speeds up Create a weather forecast for May 19 th ; that is, make-up reasonable values/conditions for the following: [6] Sky conditions (cloudiness) -- Mostly Cloudly Temperature -- Dew point – 73 F & 60 F Pressure – 1002.4 mb Wind speed -- wind direction -- 10 mph & SW 5. Identify the type of front, warm, cold, occluded, stationary. [1] Cold Front and Northwest South and cold front 6. What two characteristics are used to differentiate and identify vaious air masses? [4] Temp and Humidity 54 39 55 38 54 37 53 35 5 6 4 0 5 8 4 2 5 7 4 1 General wind direction on this side of front. [2] General wind direction on this side of front. [2]
7. What two criteria regarding sea surface temperatures are needed to say a La Nina is occurring? [4] Must have temp 5 degrees celsius lower and also be conscetiuve for at least 5 seasons. 8. Use the cyclone below to answer the questions. Type answers intothe text boxes. a. Expected wind direction: A NW B East C SW [3] b. 2-letter designation of the expected air mass: A CP B MP C MT [3] c. How will the pressure change over the next 24 hours: at A Higher B Higher [2] d. Which location is coldest? B Warmest? C [2] e. Identify the fronts (X, Y, Z): WarmY cold Z occludedX [3] 9. What is the 2-letter designation for an air mass that forms over Antarctica? [2]. cAA That forms over the Arctic Ocean in winter? mP In summer mP [4] Justify your answers to the Arctic Ocean air mass answers above. [3] 10. Which winter air mass should be colder: mP or cP? [1]CP Justify your answer. [3] CP would be colder because it is coming out the Artic bringing cold dry air. L A . C . B . X Z Y
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11. Which summer air mass should be warmer: cT or mT? [1]. cT Justify your answer. [3] cT would be warmer with it coming out the south bringing in hot and dry air. 12. Match the type of weather front to the description. [9] A. Warm B. Cold C. occluded D. Dry line E. Stationary F. polar front Leading edge of a northward moving mT air mass --A Not moving and often associated with long periods of precipitation --E Light or moderate precipitation over a large area --A Leading edge of a southward moving cP air mass --F The collision zone of the westerlies and the polar easterlies --f Warm mT air lifted and no longer in contact with the ground --C The boundary between cT and mT air masses in the southern Great Plains --d Lines of cumulonimbus clouds with heavy precipitation and maybe severe weather --b Upward wedging of air along this front yields a cloud sequence from cirrus to low stratus --A 13. Discuss the “Pineapple Express” and the “Alberta Clipper” in terms of: Pineapple Express Source region: [2] Northeast pacific 2-letter air mass involved: Mt [2] Weather on the west coast: [3] Wet and warm Alberta Clipper Source region: [2]. Moist winds from pacfic ocean 2-letter air mass involved: [2] cP Weather in the Great Lakes region: [3] The great lakes would have cold artic type weather. Also, might experience light snow.