Melting in the earth's deep upper mantle caused by carbon dioxide

Article Abstract:

An experiment was carried out to determine the solidus of carbonated peridotite from 3 to 10 GPa and demonstrate that melting beneath ridges might occur at depth up to 330 km, producing 0.03- 0.3 percent carbonatite liquid. The findings suggest that large fractions of mantle carbon are recycled rather than primordial and carbonatite melts extracted at ~ 300 km provide a supply of carbon, rare gases, and other highly incompatible elements in ridges.

Earth, Mantle (Geology), Carbonatites

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Phenotypic consequences of 1,000 generations of selection at elevated CO2 in a green alga

Article Abstract:

A long-term selection experiment is reported to investigate the phenotypic consequences of selection for growth at elevated CO2 concentrations. As a result, after 1000 generations the high selection lines of the unicellular green alga Chlamydomonas failed to evolve specific adaptation to high CO2 concentrations.

United States, Green algae, Chlamydomonas

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Fire as the dominant driver of central Canadian boreal forest carbon balance

Article Abstract:

The effects of climate, carbon dioxide concentration and fire disturbance on the biome and primary production in Canadian boreal forest are explained. The results show that carbon balance of the landscape is largely affected by fire frequency in the area.

Canada, Carbon cycle (Biogeochemistry), Carbon cycle, Taigas, Taiga

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