Terms in this set (16)
difference between climate science and paleoclimate science
climate science = average atmospheric conditions over a long period of time
Paleoclimate science = times scales on order of thousands or millions of years
3 vitals to keeping temp of the earth constant
solar flux available
What does the Stefan Botlzmann law tell us
how much infrared energy will emit per unit area
What are climate forcings
the main drivers of Earth Planetary Imbalance. Can be external or internal
Definition of climate change
refers to a change in the state of climate that can be identified by changes in the mean and/or variability of its properties, and that persists for an extended period, decades or longer.
The tilt of the Earth's axis
Wobble in Earth's rotational axis. Controls position of the solstices and equinoxes on Earth's orbit.
What are solstices and equinoxes?
solstices-summer (longest day), winter (shortest day); equinox-spring and fall (equal day and night all over earth) Spring = midway between winter and summer solstice. Fall = midway between summer and winter solstice
What do precession cycles affect?
the magnitude of the seasons as solstices approach perihelion and aphelion positions in the orbit
What is the relationship between eccentricity and precession?
the precessional index
when you add precession +eccentricity together
precession is accelerated when the eccentricity is high
refers to quantity of solar radiation energy received on a surface size of Xm2 during an amount of time
where do precession and obliquity influence insolation
precession = low lats in winter and high lats in summer
obliquity = high lats in winter
What is carbon residence time?
total amount of carbon/carbon flux out of the reservoir
Inputs into carbon cycle
plate tecs (volcanism) and oxidation of organic matter
Outputs into carbon cycle
burial of carbonate rocks, burial of organic carbon, burial of organic carbon-rich rocks carbon fixation by photosynthesis, Co2 sequestration in deep ocean
What are climate feedbacks?
mechanisms internal to the earth system which amplify or dampen climatic change; they covary with the climate state