Search

Your search keyword '"Grønvold, K."' showing total 5 results
Start Over Author "Grønvold, K."
5 results on '"Grønvold, K."'

1. High-resolution record of the Northern Hemisphere climate extending into the last interglacial period

Author

North_Greenland_Ice-Core_Project_members, Andersen, K. K., Azuma, N., Barnola, J.-M., Bigler, M., Biscaye, P., Caillon, N., Chappellaz, J., Clausen, H. B., Dahl-Jensen, D., Fischer, Hubertus, Flückiger, J., Fritzsche, Diedrich, Fujii, Y., Goto-Azuma, K., Grønvold, K., Gundestrup, N. S., Hansson, M., Huber, C., Hvidberg, C. S., Johnsen, S. J., Jonsell, U., Jouzel, J., Kipfstuhl, Sepp, Landais, A., Leuenberger, M., Lorrain, R., Masson-Delmotte, V., Miller, Heinrich, Motoyama, H., Narita, H., Popp, T., Rasmussen, S. O., Raynaud, D., Röthlisberger, R., Ruth, Urs, Samyn, D., Schwander, J., Shoji, H., Siggard-Andersen, M.-L., Steffensen, J. P., Stocker, T., Sveinbjörnsdottir, A. E., Svensson, A., Takata, M., Tison, J.-L., Thorsteinsson, T., Watanabe, O., Wilhelms, Frank, and White, J.

Published
2004

3. High-resolution record of Northern Hemisphere climate extending into the last interglacial period

Author

North Greenland Ice Core Project members, Andersen, Katrine K., Azuma, N., Barnola, J.-M., Bigler, Matthias, Biscaye, P., Caillon, N., Chappellaz, J., Clausen, Henrik Brink, Dahl-Jensen, Dorthe, Fischer, H., Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold, K., Gundestrup, N.S., Hansson, M., Huber, C., Hvidberg, Christine Schøtt, Johnsen, Sigfus Johann, Jonsell, U., Jouzel, J., Kipfstuhl, S., Landais, A., Leuenberger, M., Lorrain, R., Masson-Delmotte, V., Miller, H., Motoyama, H., Narita, H., Popp, T., Rasmussen, Sune Olander, Raynaud, D., Röthlisberger, R., Ruth, U., Samyn, D., Schwander, J., Shoji, H., Andersen, Marie Louise S, Steffensen, Jørgen Peder, Stocker, T., Sveinbjörnsdóttir, A.E., Svensson, Anders, Takata, M., Tison, J.-L., Thorsteinsson, Th., Watanabe, O., Wilhelms, F., White, J.W.C., North Greenland Ice Core Project members, Andersen, Katrine K., Azuma, N., Barnola, J.-M., Bigler, Matthias, Biscaye, P., Caillon, N., Chappellaz, J., Clausen, Henrik Brink, Dahl-Jensen, Dorthe, Fischer, H., Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold, K., Gundestrup, N.S., Hansson, M., Huber, C., Hvidberg, Christine Schøtt, Johnsen, Sigfus Johann, Jonsell, U., Jouzel, J., Kipfstuhl, S., Landais, A., Leuenberger, M., Lorrain, R., Masson-Delmotte, V., Miller, H., Motoyama, H., Narita, H., Popp, T., Rasmussen, Sune Olander, Raynaud, D., Röthlisberger, R., Ruth, U., Samyn, D., Schwander, J., Shoji, H., Andersen, Marie Louise S, Steffensen, Jørgen Peder, Stocker, T., Sveinbjörnsdóttir, A.E., Svensson, Anders, Takata, M., Tison, J.-L., Thorsteinsson, Th., Watanabe, O., Wilhelms, F., and White, J.W.C.

Abstract

Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we present an undisturbed climate record from a North Greenland ice core, which extends back to 123,000 years before the present, within the last interglacial period. The oxygen isotopes in the ice imply that climate was stable during the last interglacial period, with temperatures 5-8°C warmer than today. We find unexpectedly large temperature differences between our new record from northern Greenland and the undisturbed sections of the cores from central Greenland, suggesting that the extent of ice in the Northern Hemisphere modulated the latitudinal temperature gradients in Greenland. This record shows a slow decline in temperatures that marked the initiation of the last glacial period. Our record reveals a hitherto unrecognized warm period initiated by an abrupt climate warming about 115,000 years ago, before glacial conditions were fully developed. This event does not appear to have an immediate Antarctic counterpart, suggesting that the climate see-saw between the hemispheres (which dominated the last glacial period) was not operating at this time.

Published
2004

4. High-resolution record of Northern Hemisphere climate extending into the last interglacial period.

Author

Andersen, K.K., Azuma, N., Barnola, J.-M., Bigler, M., Biscaye, P., Caillon, N., Chappellaz, J., Clausen, H.B., Dahl-Jensen, D., Fischer, H., Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold, K., Gundestrup, N.S., Hansson, M., Huber, C., Hvidberg, C.S., and Johnsen, S.J.

Subjects
ICE, CHRONOLOGY, GLACIAL Epoch, ISOTOPES, OXYGEN
Abstract

Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we present an undisturbed climate record from a North Greenland ice core, which extends back to 123,000 years before the present, within the last interglacial period. The oxygen isotopes in the ice imply that climate was stable during the last interglacial period, with temperatures 5°C warmer than today. We find unexpectedly large temperature differences between our new record from northern Greenland and the undisturbed sections of the cores from central Greenland, suggesting that the extent of ice in the Northern Hemisphere modulated the latitudinal temperature gradients in Greenland. This record shows a slow decline in temperatures that marked the initiation of the last glacial period. Our record reveals a hitherto unrecognized warm period initiated by an abrupt climate warming about 115,000 years ago, before glacial conditions were fully developed. This event does not appear to have an immediate Antarctic counterpart, suggesting that the climate see-saw between the hemispheres (which dominated the last glacial period) was not operating at this time. [ABSTRACT FROM AUTHOR]

Published
2004
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results