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| Ganeshram, Raja S.; Pedersen, Thomas F.; Calvert, Stephen E.; Mcneill, Gavin W.; Fontugne, Michel R.. |
| The late Quaternary history of water-column denitrification of the eastern Pacific margins and the Arabian Sea is reconstructed using sedimentary delta(15)N measurements. The delta(15)N values in six piston cores raised from these regions show remarkably similar cyclic variations, being heavy (9-10.5 parts per thousand) during the interglacials and 2-3 parts per thousand lighter during the glacials. This implies that denitrification in these regions decreased substantially during the glacial periods. The glacial decline in denitrification is attributed to reduced upwelling and flux of organic material through the oxygen minimum zone. Since water-column denitrification in these areas accounts for about half of the fixed-nitrogen loss in the modern ocean,... |
| Tipo: Text |
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| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/00220/33123/31655.pdf |
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