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57 Cards in this Set
- Front
- Back
intensity of radiation
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the rate at which energy is radiated
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how does temp. of a body of matter affect the wavelength?
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higher temp=shorter wavelength at which maximum intensity occurs
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where does the maximum intensity of radiation occur at the suns temp?
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visible wavelenghts
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insolation
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the portion of the suns output of electromagnetic radiation that is received by earth at the outermost part of our atmosphere
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intensity of insolation
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the relative strength of the suns radiation that reaches a specific area of earth in a specific amount of time
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where does the maximum intensity of insolation occur?
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wavelengths of visible light
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ozone
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a form of oxygen gas in earths upper atmopshere that absorbs nearly all ultraviolet radiation
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what reduces the amount of ozone?
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chlorine and fluorine=human activities
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what others gases found in the atmosphere can absorb long-wave infrared radiation?
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water vapor, carbon dioxide, and methane
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what causes random reflection, or scattering, of insolation?
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aersols-finely dispersed solids and liquids suspended in air
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what do clouds do to light?
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when clouds are present, much of the incoming solar energy is reflected back into space
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what happens to insolation that is absorbed by earths surface?
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it is converted into heat and tends to raise the temperature of the surface
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when are the hottest days of theyear?
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one month after maximum insolation
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when does the north get 24 hours of daylight?
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june 21-summer solstice
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when does the south pole get 24 hours of daylight?
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december 21
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angle of incidence
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the angle at which the insolation strikes earth's surface
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how does the altitude of the sun vary?
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with time of day, latitude, and season
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the higher the sun is in the sky...
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the more insolation is absorbed
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the lower the sun is in the sky..
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the more insolation reflected and less is absorbed
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transpiration
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a process by which plants release water vapor into the atmosphere as part of their life functions
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why does water heat up and cool off mre slowly than an equal area of land?
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water has a higher specific heat
when insolation strikes water surfaces, much of its energy is converted to stored heat as some water evaporates. thus, less energy is available to increase the water temp. |
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explain the greenhouse effect
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the greenhouse cases absorbs the insolation that comes from earths surface as long infrared radiation. this warms the atmosphere and serves as a heat planket, which makes earth warm
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greenhouse gases
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carbon dioxide, water vapor, methane, and othes
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greenhouse gases
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carbon diozide, methane, water vapor, and others
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global warming
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an increase in earths average temps caused by an increase in greenhouse gases in the atmopshere
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what is global warming causes by?
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the burning of wood and fossil fuels
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what could global warming cause?
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rising sea levels caused by melting glaciers and ice
shifting of earths climatic zones |
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for each degree latitude north or south of the place where insolation is perpendicular to earths surface, the angle of incidence is..
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one degree less
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where is the intensity of insolation the greatest and when?
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at the equator at each equinoz, and decreses w/ increasing latitude
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where is insolation perpendicular to earths surface on june 21?
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23 1/2 degrees north
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what is the angle of the suns rays at noon on december 21 in NY?
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24.5 degrees
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what is the angle of the suns rays at noon in NY on the equinoxes?
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48 degrees
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what is the measure of the suns rays at noon in NY on june 21?
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71.5 degrees
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how does the suns altitude change throughout one day?
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starts at zero degrees at sunrise, goes up, and goes back down to zero degrees at sunset
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when does the maximum angle and intensity occur during the day?
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at solar noon
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duration of insolation
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length of time that insolation is received each day..the time between sunrise and sunset
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when does earths surface temp. rise?
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when energy is being gained at a greater rate than it is being lost
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when does earths surface temp. fall?
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when energy is being lost faster than it is being gained
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when is the hottest part of an average day?
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sometime in the midafternoon
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why?
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bc after noon, earths surface continues to gain more energy from the sun than it loses
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when do the coldest temps occur?
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slightly after sunrise
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why?
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earths surface continues to lose heat throughout the night until after insolation begins at sunrise
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HEAT BUDGET
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THE REsult of the balance between the total amount of energy an object receibves and the total amount it emits or loses
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what is heat budget a result of?
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a radiation balance between the radiation from the sun and earths interior compared to the radiation earth gives off to space
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what has sifted earths heat budget?
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ice ages
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interglacial periods?
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periods between ice ages when earth was warmer than it is today
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el nino
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warming event that occurs every 2 to 10 years when the normally cold waters of the eastern pacific ocean off western south america are replaced with a cast area of warmer waters
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what does el nino cauase?
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qclimatic repercussions around the word-flooding, droughts, and heat waves
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la nina
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periods of exceptionally cold water in the eastern pacific ocean which also affect worldwide climate
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sunspot
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a darker region of the sun's visible surface
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what happens when there is a large number of sunspots?
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earth receives more insolation which shifts heat budget--high temps
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what occuracnes correspond w/ the advances of the glaciers and can shift earths heat budget?
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changes in earths orbit and axis tilt
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how do volcanic eruptions shift earths heat budget?
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aerosols such as volcanic ash and sulfur copounds go in the stratosphere and stay for months or years. they make earths atmopshere less transparent to insolation and reflect a greater than normal amount of insolaton back into space..causing cooler temps
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3 human activities that cause shifts in heat budget
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1) desertification-making deserts=warmer temps
2) deforestation-cutting down forects-higher temps. (trees absorbed insolation) 3) urbanization-clearing land of plants and trees to make buildings-produce greenhouse gases=global warming |
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what are the astronomical causes of the seasons?
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the tilt of earths axis, the parallelism of earths axis, the revolution of the earth around the sun, and the small seasonal effect of earths elliptical orbit
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when are the warmest temps in the northern hemisphere?
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july-august
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when are the coldest temps in the northern hemipshere?
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jan-feb
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