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6 Cards in this Set
- Front
- Back
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What proportion of solar radiation is reflected back to space? |
25% |
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What is the cause of global atmospheric circulation patterns? |
Energy or temperature gradient across earths surface. |
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What is the cause of vertical temperature profile in the stratosphere? |
Higher levels of radiation in the outer atmosphere. Presence of greenhouse gasses in the stratosphere that reabsorb outgoing radiation. |
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Deep water circulation is critic for the functioning of the planetary system and oceans because it: |
Causes materials and nutrients to accumulate in ocean gyres. |
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Why is permafrost loss a global concern? |
Permafrost systems sequester a large amount of C in their aboveground biomass, and permafrost thaw may result in reduced photosynthesis. Permafrost systems sequester a large amount of C in their soils, and permafrost that may accelerate organic matter decomposition and co2 release. |
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Why is co2 released during the process of land use change? |
Land use change (deforestation) often replaces trees with smaller plants that are unable to photosynthesise as much as larger ones, therefore more co2 is released to the atmosphere from respiration. Crop plants respire at a higher rate than trees, resulting in higher co2 emissions. |
