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Meteorology 101

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AT&T 7:51 AM Test 3 Test 3 Online-1.docx 5. A wind blowing at a constant speed parallel to straight line isobars with the pressure Ogradient force (PGF) and the Coriolis force in balance is called a a. gradient wind. b. geostrophic wind. c. meridional wind. d. cyclostrophic wind. e. zonal wind. 6. The wind around a surface high pressure center in the Northern Hemisphere blows a. counterclockwise and outward from the center. b. counterclockwise and inward toward the center. c. clockwise and inward toward the center. d. clockwise and outward from the center 7. Winds blowing counter-clockwise around a low pressure system in the Northern Hemisphere are also described as: yclonic converging b. cyclonic, diverging c. converging, cyclonic d. diverging, anticyclonic 8. The gradient wind speed around a surface low is due to the balance of coriolis, centrifugal force, and PGF a. subgeostrophic b. unchanged c. supergeostrophic 9. The coriolis force is a minimum when: a. wind velocity is zero Dashboard Calendar To Do Notifications Inbox AT&T 7:51 AM Test 3 Test 3 Online-1.docx 14. Lines of constant pressure on a weather chart are referred to as: a, isobars b. isotachs c. isotherms d. isoheights 15. A wind that features a balance of centrifugal force and pressure gradient force only, and is unaffected by the coriolis force, is called a: Thermal wind b. Geostrophic wind e Cyclostrophic Wind d Gradient Wind 16. A mid-latitude cyclone requires the following for cyclogenesis to be initiated: a low level cyclonic shear on a stationary front b. warm air to the east of cold air at a stationary front divergence in the upper-troposphere above the developing low pressure center at the surface d all of the above 17. Instability in the troposphere results if: acP and mP air interact b mT, cP and mP air interact e cT and mP air interact 18. Which of the following is not true abouta arm front? aThe warm air rising systematically and slantwise produces multi layer cirrus-, alto- and nimbus- stratus clouds from north to south b The rain produced by gentle upglide over mPor cP at the front is typically not as heavy, but is of longer duration, than that at a cold front Southerly winds south of the warm front cause warm, moist air to move in d Thunderstorms never form at a warm front Dashboard Calendar To Do Notifications Inbox

Answer 1

5. (b)Subgeostropic wind is a constant wind speed and balanced between the Coriolis force and the pressure gradients.

6.(a)The wind blows in clock wise arounds high pressure system in Northern hemisphere.

7.(a)The wind blows in counter-clock wise arounds low pressure system in converging pattern in Northern hemisphere.

8.(a)Subgeostropic wind acting on the low pressure system due to the balance of Coriolis and PGF.