cycle du carbone et de l'eau Flashcards

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1
Q

4 reservoirs d’eau

A

hydrosphere ( oceans, lacs, riviere, glaciers, sols)
atmosphere
biosphere
geosphere

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2
Q

dessiner cycle de l’eau

A
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3
Q

4 reservoirs de carbone

A

hyrosphere (oceans, eaux superfiicelles)
atmosphere
biosphere
geosphere (sediments carbonatés, lithos, asthenos)

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4
Q

Qu’est ce que le cycle long du carbone

A

Echanges entre la geosphere et les autres reservoirs
(volcanisme, sedimentation, diagenese et metamorphisme)

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5
Q

Qu’est ce que le cycle court du carbone

A

Echanges entre les reservoirs de surface :
atmosphère, biosphere et hydrosphere (photosynthese, respiration, degazage des océans, solubilisation, alteration, precipitation et dissolution des carbonates)

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6
Q

5 facteurs influencant le cycle du C

A
  • Volcanisme
  • Taux expansion oceanique (car il peut augmenter le volcanisme)
  • Aletration des roches (carbonates et silicates) et la precipitation des carbonates
  • Piegage de la MO
  • Impact des humains
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7
Q

nature des impacts humains et consequence

A

o Combustion des matieres fossiles
o Deforestation
o Augmentation alteration des sols
= desequilibre du cycle du C, car augmente les flux vers l’atmosphère donc augmentation effet de serre donc rechauffement climatique

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8
Q

dessiner cycle du C

A
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