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exam 1 definitions
exam 1 defntons
Term | Definition |
---|---|
insolation | incoming solar radiation total solar radiation energy received on given surface area during given time |
albedo | percent of insolation reflected |
evapotranspiration | plant transpiration and sum of evaporation from earth's surfaces |
global radiation balance | balance between incoming shortwave radiation from sun and outgoing longwave radiation from earth |
latent heat | released when substance changes state |
sensible heat | heat we can sense and feel |
hydrosphere | water in all its forms |
lithosphere | structural rock foundations on planet's surface |
biosphere | earth's living plants and organisms |
atmosphere | composed of gases that envelop and protect the planet |
IPCC | 800+ scientists who study climate change by amassing data |
aphelion | when earth is the furthest from the sun |
periphelion | earth is closest to sun |
longitude | horizontal lines |
latitiude | vertical lines |
circle of illumination | divides shadowed and lit hemisphere |
solarday | defined by one complete rotation |
solarnoon | time of highest solar angle |
sextant | device used to find latitude |
subsolar point | point when direct solar rays are 90 degrees |
equinox | subsolar point @ equator causing 12 hour day and night everywhere |
polar projection | map size decreases with latitude |
mercator projection | map scale increases with latitude longitude lines become parallel and straight |
goode projection | sizes are correct and the shapes are distorted |
GIS | computer system of collection storage analysis and display of spatial data |
axial tilt | earths axis tilted relative to orbital plane 23.5 degrees |
GPS | geometrically determines location |
International Dateline | line from N to S pole showing change in calendar day 180th meridian go west its the next day |
earths rotation | 360 degrees |
plane of the ecliptic | inclined at 23.5 degrees |
royal observatory | location of prime meridian |
prime meridian | where longitude is 0 degrees |
parallelism | earths axis remains parallel as it revolves around the sun |
solstice | equal 12 hour day and night at equator |
electromagnetic radiation | emittes as collection of wavelengths |
shortwave radiation | emitted by hot sun |
longwave radiation | emitted by cooler earth |
world latitude zones | based on: insolation variation in day length seasonal variability |
equatorial | 0 to 10 |
tropical | 10 to 25 |
subtropical | 25 to 35 |
midlatitude | 35 to 55 |
subartic | 55 to 60 |
artic | 60 to 75 |
polar | 75 to 90 |
snowball earth theory | albedo idea that earth was once giant frozen ball reflecting energy from the sun |
tropospheric composition | nitrogen, oxygen, argon, carbon dioxide |
counter radiation | long wave radiation from earth is absorbed into earth |
scattering | direction of radiation scattered by atmospheric particles |
absorption | radiaation absorbed into gas liquid or solid and heats up |
effects of clouds | clouds make planet cooler by absorbing radiation clouds make planet warmer by trapping heat in atmosphere |
isobars | lines of equal temperature on a weather map |