Wx 201

WX 201 Exam 3 Study Guide with complete solutions What is a cloud? a volume of atmosphere containing numerous water droplets and/or ice particles What ingredients are necessary for cloud development? -Abundant water vapor -Condensation nuclei particles -A cooling mechanism What is supercooled water? At what temperature does it exist, and how does it freeze? Cloud drops that remain liquid down to -40 degrees Celcius. May freeze when the temperature decreases, encounters an ice nuc...

WX 201 Exam 3 HW #1 & 2 Questions and Answers Upper-level winds in the middle latitudes of both hemispheres generally blow from ____. The west The pressure gradient force is directed from higher pressure toward lower pressure at all places on Earth. The Coriolis force acts at a ____ degree angle to the wind. 90 On a 500 millibar chart, ____ are drawn to represent horizontal changes in altitude which correspond to horizontal changes in pressure. Contour Lines The surface ...

WX 201 Exam 2 with correct Answers Graded A+ At what time of day is the relative humidity normally at a minimum? when the air temperature is highest The time of day when the relative humidity reaches a maximum value is usually at the time when the air temperature is lowest. The instrument that measures humidity by measuring the amount of radiant energy absorbed by water vapor is the infrared hygrometer. The relationship between the mass of water vapor in an air parcel and the ...

WX 201 Exam 2 with correct Answers What are constant pressure surfaces? Constant pressure at all points In regard to constant pressure surfaces, where do higher heights form? Over warm air In regard to constant pressure surfaces, what do high heights correspond to region wise? Regions of high pressure In regard to constant pressure surfaces, what will happen to the wind if the height gradient gets stronger? Wind will get stronger What height on the standard atmosphere re...

WX 201 Exam 2 with correct Answers (Graded A) Dew is most likely to form on clear, calm nights Which two clouds can produce precipitation? cumulonimbus and nimbostratus If fog is forming in Denver, Colorado (located on the eastern side of the Rocky Mountains), and the wind is blowing from the east, then the fog is most likely upslope fog On a cold, winter morning, the most likely place for radiation fog to form is in a valley As Apollo 12 ascended into the atmosphere, th...

WX 201 Exam 2 with correct Answers (Graded A) Reflectivity attenutation absorption of radiation by targets WSR-88D Weather Surveillance Radar 1988 Doppler, detects precip and atmospheric movement Doppler ability to detect the "shift in the phase" of an energy pulse aircraft radar less precise than WSR-88D ground radar elevated to avoid terrain, raises elevation angle 1 degree every 360 degree scan, probably wont give you full picture of scan, cone of silence wher...

WX 201 Exam 2 with correct Answers (Graded A) Generally, the concentration of condensation nuclei is greater over the oceans than over land. False If a city receives 24 inches of snow, it is the equivalent to 18 inches of rain. False An important factor in the production of rain by the collision-coalescence process is the number of ice crystals in the cloud. False In a cloud composed of water droplets and ice crystals, the saturation vapor pressure is less over the droplets th...

WX 201 Exam 2 with correct Answers (Graded A) Analysis Chart Depict actual data obtained at a given observation time Forecast Chart Computer model charts predicting future conditions of the atmosphere; surface charts and upper level charts are created Constant altitude charts All locations at the same altitude above ground level (for surface analysis, pressures are typically adjusted to MSL) Constant pressure charts all locations on the chart have the same pressure; contour l...

WX 201 Exam 2 with correct Answers (Graded A) large raindrops fall _____ smaller raindrops; and have ______terminal velocity than/as small raindrops a. slower than; a greater b. faster than; a greater c. faster than; a lesser d. at the same rate as; the same e. slower than; a lesser B the most likely time for an ordinary thunderstorm to form is a. just before sunrise b. late afternoon c. just after sunrise d. around midnight e. at noon B The region of a cloud where onl...

WX 201 Exam 2 with correct Answers (Graded A) An unsaturated air parcel cools or warms at what rate? Dry adiabatic lapse rate (DALR) A saturated air parcel cools or warms at which rate? Moist adiabatic rate (MALR) If the environmental lapse rate is greater than the dry adiabatic rate, the atmosphere is: Absolutely unstable Surface cooling and warm air advection aloft generally do what to the atmosphere? Make it more stable An air parcel starts to rise freely when it firs...

WX 201 Exam 2 with correct Answers (Graded A) ____ is a condition in which the environmental lapse rate is equal to the dry adiabatic rate. Neutral stability The rate at which the actual air temperature changes with increasing height above the surface is referred to as the ____ rate. environmental lapse Absolute instability results when the environmental lapse rate is ____ the ____ adiabatic rate. greater than; dry An air parcel in an unstable atmosphere has ____ force acting ...

WX 201 Exam 1 Study Guide|Complete And Graded A+ Variable gasses in the atmosphere CO2 , Water Vapor , O3 (ozone) , CH4(methane) Permanent gasses in the atmosphere Oxygen (O2) , Nitrogen (N2) , Nobel Gasses Characteristics of a variable gas Concentration is changing ; sources and sinks are not consistent Characteristics of a permanent gas Concentration in atmosphere remains constant ; sources and sinks consistent Examples of green house gasses CH4 , CO2 , CFCs , O3 ...

WX 201 Exam 1 |Complete And Graded A+ Atmosphere Collection of gaseous molecules, small liquid and solid particles Latitude The angular distance along the meridian from the point in question to the equator Tropic of Capricorn 23.5 degrees south Tropic of Cancer 23.5 degrees North Weather atmospheric conditions at any particular place or time Climate Accumulation of weather weekly, monthly, seasonally. "accumulation of weather" Density Mass of anything ...

WX 201 Exam 1 |Complete And Graded A+ Humidity is a measure of the amount of water vapor in the air Which of the following is considered a variable gas in Earth's atmosphere? water vapor Water vapor molecules are invisible The atmospheric concentration of CO2 has risen by about ____ since 1958, when measurements began at Mauna Loa Observatory in Hawaii. about 30% Most human-made impurities found in the atmosphere present a health and environmental hazard. These are cal...

WX 201 Exam 1 |Complete And Graded A+ Meteorology is the study of: The Atmosphere Weather describes the conditions averaged over a region or over a period, whereas climate describes the condition of the atmosphere at a particular time and place. False In ____ near Earth's surface today, nitrogen occupies 78 percent and oxygen nearly 21 percent. The volume of air Atmospheric concentration of helium has increased from below 300 ppm historically to over 400 ppm presently. Fals...

WX 201 Exam 1 |Complete And Graded A+ Permanent Gases in the Atmosphere Constant concentration in the atmosphere 78% Nitrogen, 21% Oxygen, 1% Other Gases: Argon, Neon, Helium, Krypton, Hydrogen Variable Gases in the Atmosphere The amount/concentration in the atmosphere varies or changes Includes: Water Vapor, Carbon Dioxide, Methane, and Ozone Sources produce gases Ex: decaying plants/animals, volcanoes, photosynthesis Sinks deplete (remove) gases Ex: soil bacteria, resp...

WX 201 Chapter 3 Sandbox Exam Questions and Answers When a liquid thermometer is held in in the shade, it will: accurately measure the air temperature. The maximum in daytime surface temperature typically occurs before Earth receives its most intense solar radiation. False When in danger of a hard freeze, citrus farmers often spray a mist of water that will freeze and create a protective coating of ice over the fruit. True In July, at middle latitudes in the Northern Hemispher...

WX 201 Chapter 2 Exam with correct Answers The amount of heat energy required to bring about a small change in temperature in a substance is called the heat capacity. Sunlight that bounces off a surface is said to be ____ from the surface. reflected The temperature of a rising air parcel always cools due to expansion. The horizontal transport of any atmospheric property by the wind is called advection When water changes from a liquid to a vapor, we call this process eva...

WX 201 - Exam 2 Questions and Answers The subtropical jet stream is usually found between ________. 20 degrees to 30 degrees latitude, 200-mb level The summer monsoon in eastern and southern Asia is characterized by ________. wet weather and winds blowing from sea to land The wind around a surface high pressure center in the Northern Hemisphere, blows _______ and outward from the center. clockwise Both the polar front jet stream and the subtropical jet stream are found at whic...

WX 201 - Exam 2 Chapter 6-10 Questions and Answers The elevation where clouds form is called ____ level. condensation If the environmental lapse rate is 5 ° C per 1,000 m and the temperature at Earth's surface is 25 ° C, then the air temperature at 2,000 m above the ground is 15°C. What transfers heat upward into the atmosphere? thermals Just above cumulus clouds, you would expect to find a stable layer. If an air parcel is given a small push upward and it falls back...