1. Why are carbon dioxide concentrations measured at Mauna Loa, Hawaii, higher i
ID: 288401 • Letter: 1
Question
1.
Why are carbon dioxide concentrations measured at Mauna Loa, Hawaii, higher in Northern Hemisphere winter than in Northern Hemisphere summer?
There are more plants in the Southern Hemisphere than the Northern Hemisphere.
There is less photosynthesis in winter than in summer.
Decomposition rates are higher in the summer than in the winter.
There is no respiration in the ocean.
2.
Which of the following reservoirs of carbon contains the most carbon?
Oceanic bicarbonate ion
Atmospheric CO2
Limestone in sedimentary rocks
Living biomass
Marine carbonate sediments
3.
Why do atmospheric carbon dioxide concentrations increase when humans turn rainforests into agricultural lands?
Rainforests fix more carbon in the soil than agricultural lands.
Rainforests have smaller respiration rates than agricultural lands.
Rainforests fix less nitrogen in the soil than agricultural lands.
Rainforests are faster at photosynthesis than agricultural lands.
4.
During a La Nina event, upwelling is stronger than normal in the eastern equatorial Pacific. Considering just diffusion processes, the direct local effect of this would be _____ CO2 in the atmosphere.
no change in
higher
AThere are more plants in the Southern Hemisphere than the Northern Hemisphere.
BThere is less photosynthesis in winter than in summer.
CDecomposition rates are higher in the summer than in the winter.
DThere is no respiration in the ocean.
Explanation / Answer
1.B- there is less photosynthesis in winter
photosynthesis is performed by the leaves of plants, during winter in hawaii it is snow covered and lessens the photosynthesis process.
2. C- limestone in sedimentary rocks.
atmosphere contains 750 GTC , vegetation contains 2200 GTC surface ocean 1000 GTC deep ocean 39000 GTC lithosphere and mantle contanis 100000 GTC ( giga tons carbon)
3.D - Rainforests are faster at photosynthesis than agricultural lands
4.B - Higher
during El Nino (la nina) events atmospheric CO2 growth rate is increased ( decreased) at surface stations.
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