Gênese e micromorfologia de solos crioturbados na antártica marítima
Maritime Antarctica, as an environment of high climate sensitivity, represents a laboratory scenario for the glimpse of soil formation, expressing weathering processes and biogeochemical dynamics in unique conditions on the planet. The primary engine is the freezing/thawing processes, and in the sec...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/46830 |
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| Resumo: | Maritime Antarctica, as an environment of high climate sensitivity, represents a laboratory
scenario for the glimpse of soil formation, expressing weathering processes and biogeochemical
dynamics in unique conditions on the planet. The primary engine is the freezing/thawing
processes, and in the second instance the formation of permanently frozen soils, known as
permafrost. Antarctic soils are directly linked to thermal phenomena, which causes ablation of
glaciers, causing relief modeling processes and consequent pedological structuring. In general,
the soils of Antarctica are shallow and incipient and the ornithogenic areas are an exception to
the rule, where the deepest soils are found, with greater performance of chemical weathering.
However, the Byers Peninsula, as one of the largest ice-free areas, inserted in a climatic context
with atypical liquid precipitation for the Maritime Antarctic environment, is dominated by
cryoturbation features, even in soils without detection of permafrost, demonstrating that water
acts as a the sine qua non for cryoturbation processes in Antarctic soils. |
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