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- Climatic changes150
- Meteorology99
- Atmosphere97
- Atmospheric chemistry70
- Paleoclimatology65
- Geology58
- Hydrology51
- Geophysics45
- Oceanography44
- Geochemistry41
- Plate tectonics39
- Submarine geology37
- Atmosphere, Upper34
- Chemical oceanography30
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- Geology, Stratigraphic29
- Geomorphology21
- Climatic changes--Effect of human beings on20
- Biogeochemistry19
- Environmental sciences19