Background for modelling Flashcards
What is net radiation ?
Radiation that comes form the sun
What effects net radiation ?
cloud cover
what wave type os absorbed by the earths surface ?
short wave radiation
what wave type is released by the earths surface ?
long wave radiation
whats sensible heat flux ?
Heat you can feel
Whats latent heat flux?
heat doing work- solids to liquids
what is evapotranspiration?
process of water going from the soil to roots to stems to leaves and stomata
what dictates the amount of surface water run off?
the saturation of the ground
whats carbon flux?
the transport of carbon from the atmosphere into the environment ( plants) via photosynthesis
what happens to carbon in a drought?
it goes back into the atmosphere as the plants die
what are closely coupled when heat changes ?
water and carbon fluxes
what does GPP stand for ?
Gross primary production
what is GPP?
Total c fixed by plants through photosynthesis
what does NPP stand for?
Net primary productivity
What is NPP?
GPP- autotrophic respiration from the plants
what does NEE stand for?
Net Ecosystem exchange
What is NEE?
NPP- heterotrophic respiration from roots and trunks and fungi in surroundings
What does NBP stand for?
Net Biome Exchange
What is NBP?
NPP- loss due to disruption - fires
what must you take into consideration when trying to measure fluxes across and area?
seasonality, land heterogeneity and spacial variably
whats licor?
small automated chamber that sits on top of a small area and measure gas exchanges before releasing
whats a large static chamber?
measures light response curve- progressively cover and measure respiration and growth of plants under
whats branch bag etc?
cover a branch before it has leaves and continue til the leaves fall off
when is eddy flux used ?
to measure over large areas
what is in an eddy flux?
a sonic anemometer , measures 10,000 x a second
what does CASS stand for ?
carbon accounting simulation system
