G 2 Flashcards
where does the weather occur, everyhting happens (albedai visoki ir tt)?
in troposphere
(input) incoming solar radiation is called
insolation
output to the atmosphere
re-radiation
radiation
the emission of short waves and long waves; sUn has short waves
wavelength of re-radiation
long-waves
green house effect
most of the short-wave radiation is let through the atmosphere but CO2 traps the outgoing long-wave radiation, warming the atmosphere because it bounces off the surface to greenhouse gasses and then the long-wave radiation is either absorbed by the CO2 or relfecting the waves again to the surface.
according to clouds, how there will be more radiation from the sun
the cloud cover should be as less as possible and/or the cloud should be higher
why there is a drastic change in temperatures during day and night in extreme environments
in deserts, due to lack of cloud cover, the loss of energy at night is maximized because there are no long-wave return form the clouds to the surface. If the area is cloudy, like in tropical rainforests, the loss of energy is less noticeable (the temperature does now change over day and night that noticeably)
why there is a greenhouse effect?
due to human activities such as burning fossil fuels (coal, oil, and natural gas) and land-use changes such as deforestation because if less trees - less to absorb CO2 and produce O2.
is greenhouse effect good in any way?
there could be no life on earth
most common greenhouse gas? (say % too) *also state which gases implicated in global warming
water vapour - 95%
implicated: carbon dioxide, methane
would changes in atmospheric composition decrease or increase global temperature?
decrease
changes in reflectivity (albedo) decrease or increase global temperature?
increase, the albedo is affected by and affects global climate change, for example, as ice melts and is replaced by darker-coloured vegetation, the amount of insolation absorbed increases and temperature rise.
POSITIVE FEEDBACK LOOP
melting ice reducing the planet’s albedo, enhancing climate change. most seeable in tundra environment where ice is melting during the winter even, releasing frozen methane. leads to increasing change.
NEGATIVE FEEDBACK LOOP
increased evaporation due to higher temperatures, may lead to increased snowfall, reducing the global temperature. Also, release of bigger amounts of carbon dioxide allows bigger rate of photosynthesis, reducing the pollution. produces long-term stability in the system