The origin of green icebergs in Antarctica
| Autor: | Hans Oerter, Wolfgang Graf, J. Kipfstuhl, Hartmut Hellmer, Gerhard Dieckmann |
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| Rok vydání: | 1992 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Ice stream Soil Science Antarctic sea ice Aquatic Science 010502 geochemistry & geophysics Oceanography 01 natural sciences Ice shelf Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Sea ice 14. Life underwater Ice divide 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology geography geography.geographical_feature_category Ecology Paleontology Forestry Iceberg Geophysics Fast ice Space and Planetary Science Ice sheet Geology |
| Zdroj: | Scopus-Elsevier EPIC3Journal of Geophysical Research, Vol. 97, No. C12, pp., pp. 20319-20324, ISSN: 0148-0227 |
| ISSN: | 0148-0227 |
| Popis: | A comparison of samples from a translucent green iceberg with a core from the Ronne Ice Shelf revealed an excellent agreement in isotopic composition, crystal structure, and incorporated sediment particles. Marine shelf ice which constitutes the basal portion of some ice shelves is considered to be the source of green icebergs. It most likely results from "ice pump" processes which produce large amounts of ice platelets in the water column beneath ice shelves. These subsequently accumulate and become compacted into bubble-free, desalinated ice. Iceberg and drift-buoy trajectories indicate that green icebergs observed in the Weddell Sea originate from the Amery Ice Shelf rather than from the Ronne Ice Shelf, although the latter ice shelf is also a potential source. |
| Databáze: | OpenAIRE |
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