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Your search keyword '"St John, K. E. K."' showing total 5 results
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5 results on '"St John, K. E. K."'

1. Arctic hydrology during global warming at the Palaeocene/Eocene thermal maximum

Author

Pagani, M, Pedentchouk, N, Huber, M, Sluijs, A, Schouten, S, Brinkhuis, H, SINNINGHE DAMST, J. S., Dickens, G. R., Backman, J, Clemens, S, Cronin, T, Eynaud, F, Gattacceca, J, Jakobsson, M, Jordan, R, Kaminski, M, King, J, Koc, N, Martinez, N. C., Matthiessen, J, Mcinroy, D, MOORE T. C., Jr, Moran, K, O'Regan, M, Onodera, J, Plike, H, Rea, B, Rio, Domenico, Sakamoto, T, Smith, D. C., Stein, R, ST JOHN, K. E. K., Suto, I, Suzuki, N, Takahashi, K, Watanabe, M, and Yamamoto, M.

Subjects
Paleocene eocene thermal maximum, Arctic
Published
2006

2. Sites M0001-M0004

Author

Backman, J., Moran, K., McInroy, D., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G. R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R. W., Kaminski, M., King, J., Koç, N., Martinez, N. C., Matthiessen, J., Moore Jr, T. C., Onodera, J., O Regan, M., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D. C., Stein, R., St John, K. E. K., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., and Yamamoto, M.

Published
2006

3. Episodic fresh surface waters in the Eocene Arctic Ocean

Author

Brinkhuis, H, Schouten, S, Collinson, M. E., Sluijs, A, SINNINGHE DAMST, J. S., Dickens, G. R., Huber, M, Cronin, T. M., Onodera, J, Takahashi, K, Bujak, J. P., Stein, R, VAN DER BURGH, J, Eldrett, J. S., Harding, I. C., Lotter, A. F., Sangiorgi, F, VAN KONIJNENBURG VAN CITTERT, H, DE LEEUW, J. W., Matthiessen, J, Backman, J, Moran, K, Clemens, S, Eynaud, F, Gattacceca, J, Jakobsson, M, Jordan, R, Kaminski, M, King, J, Koc, N, Martinez, N. C., Mcinroy, D, Moore, T. C., O'Regan, M, Plike, H, Rea, B, Rio, Domenico, Sakamoto, T, Smith, D. C., ST JOHN, K. E. K., Suto, I, Suzuki, N, Watanabe, M, Yamamoto, M., Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), and Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
Arctic sea ice decline, microfossil, 010504 meteorology & atmospheric sciences, fern, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, 010502 geochemistry & geophysics, Eocene, 01 natural sciences, Paleoclimatology, paleoclimate, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Multidisciplinary, biology, Arctic dipole anomaly, greenhouse ecosystem, 15. Life on land, Azolla, biology.organism_classification, hydrological cycle, Arctic geoengineering, Sea surface temperature, Oceanography, Arctic, 13. Climate action, Eocene, fern, greenhouse ecosystem, hydrological cycle, microfossil, paleoclimate, Paleogene, Cenozoic, Geology, Paleogene
Abstract

It has been suggested, on the basis of modern hydrology and fully coupled palaeoclimate simulations, that the warm greenhouse conditions that characterized the early Palaeogene period (55-45 Myr ago) probably induced an intensified hydrological cycle with precipitation exceeding evaporation at high latitudes. Little field evidence, however, has been available to constrain oceanic conditions in the Arctic during this period. Here we analyse Palaeogene sediments obtained during the Arctic Coring Expedition, showing that large quantities of the free-floating fern Azolla grew and reproduced in the Arctic Ocean by the onset of the middle Eocene epoch (approximately 50 Myr ago). The Azolla and accompanying abundant freshwater organic and siliceous microfossils indicate an episodic freshening of Arctic surface waters during an approximately 800,000-year interval. The abundant remains of Azolla that characterize basal middle Eocene marine deposits of all Nordic seas probably represent transported assemblages resulting from freshwater spills from the Arctic Ocean that reached as far south as the North Sea. The termination of the Azolla phase in the Arctic coincides with a local sea surface temperature rise from approximately 10 degrees C to 13 degrees C, pointing to simultaneous increases in salt and heat supply owing to the influx of waters from adjacent oceans. We suggest that onset and termination of the Azolla phase depended on the degree of oceanic exchange between Arctic Ocean and adjacent seas.

Published
2006
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4. Sedimentation and subsidence history of the Lomonosov Ridge

Author

Moore, T. C., Backman, J., Moran, K., McInroy, D., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G. R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R. W., Kaminski, M., King, J., Koç, N., Martinez, N. C., Matthiessen, J., Moore Jr, T. C., Onodera, J., O Regan, M., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D. C., Stein, R., St John, K. E. K., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., and Yamamoto, M.

Published
2006

5. Expedition 302 geophysics: integrating past data with new results

Author

Jakobsson, M., Floden, T., Backman, J., Moran, K., McInroy, D., Brinkhuis, H., Clemens, S., Cronin, T., Dickens, G. R., Eynaud, F., Gattacceca, J., Jordan, R. W., Kaminski, M., King, J., Koç, N., Martinez, N. C., Matthiessen, J., Moore Jr, T. C., Onodera, J., O Regan, M., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D. C., Stein, R., St John, K. E. K., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., and Yamamoto, M.

Published
2006

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