Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes
Lakes and lake sediments from four areas around the Antarctic Peninsula are described. The concentrations of trace metals in sediment are found to be a useful tool in distinguishing between the different sedimentary phases during a transition from marine to limnic environment. A tephrochronology bas...
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Umeå universitet
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ftumeauniv:oai:DiVA.org:umu-96890 2023-10-09T21:45:14+02:00 Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes Zale, Rolf 1993 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96890 eng eng Umeå universitet Umeå : Umeå Universitet GERUM. Naturgeografi, 0282-5597 17 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96890 urn:isbn:91-7174-790-7 info:eu-repo/semantics/openAccess Lake sediments Antarctic Peninsula radiocarbon dating climatic and environmental changes sediment chemistry Physical Geography Naturgeografi Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 1993 ftumeauniv 2023-09-22T13:48:43Z Lakes and lake sediments from four areas around the Antarctic Peninsula are described. The concentrations of trace metals in sediment are found to be a useful tool in distinguishing between the different sedimentary phases during a transition from marine to limnic environment. A tephrochronology based on Deception Island tephra is developed, and used to cross date sediments from different lakes in order to overcome the radiocarbon dating problem of the area. The fluctuating concentrations of copper and phosphorus from penguin guano in the sediment of Lake Boeckella are used as a proxy for the penguin inpact on the sediment, and the size of the penguin rookery on the shores of the lake. Anthropogenic activities in the area, as well as climatic changes are discussed in relation to the rookery size. A radiocarbon dating model developed for the sediment of Lake Boeckella showed that the radiocarbon correction factor in the sediment depends on the amount and apparent age of the penguin guano washed down into the lake, and the amount of particulate carbon from the watershed present in the sediment. Neither the "old" meltwater from the glaciers nor dissolved carbonates contributes significantly to the correction factor. The model is used to achieve more accurate radiocarbon dates of the Lake Boeckella sediment. This model, or a modified version, may contribute to a higher dating accuracy and a better understanding of the dating problems in Antarctica. Deglaciation dates, as well as data on the climatic and environmental history of Byers Peninsula on Livingston Island, South Shetland Islands, of Hope Bay, Antarctic Peninsula and of Hidden Lake area, James Ross Island are given. Diss. (sammanfattning) Umeå : Umeå universitet, 1993, härtill 6 uppsatser. digitalisering@umu Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island James Ross Island Livingston Island Ross Island South Shetland Islands Umeå University: Publications (DiVA) Antarctic Antarctic Peninsula Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Hidden Lake ENVELOPE(63.048,63.048,-67.687,-67.687) Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Lake Boeckella ENVELOPE(-57.000,-57.000,-63.400,-63.400) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Ross Island South Shetland Islands The Antarctic |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Lake sediments Antarctic Peninsula radiocarbon dating climatic and environmental changes sediment chemistry Physical Geography Naturgeografi |
spellingShingle |
Lake sediments Antarctic Peninsula radiocarbon dating climatic and environmental changes sediment chemistry Physical Geography Naturgeografi Zale, Rolf Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
topic_facet |
Lake sediments Antarctic Peninsula radiocarbon dating climatic and environmental changes sediment chemistry Physical Geography Naturgeografi |
description |
Lakes and lake sediments from four areas around the Antarctic Peninsula are described. The concentrations of trace metals in sediment are found to be a useful tool in distinguishing between the different sedimentary phases during a transition from marine to limnic environment. A tephrochronology based on Deception Island tephra is developed, and used to cross date sediments from different lakes in order to overcome the radiocarbon dating problem of the area. The fluctuating concentrations of copper and phosphorus from penguin guano in the sediment of Lake Boeckella are used as a proxy for the penguin inpact on the sediment, and the size of the penguin rookery on the shores of the lake. Anthropogenic activities in the area, as well as climatic changes are discussed in relation to the rookery size. A radiocarbon dating model developed for the sediment of Lake Boeckella showed that the radiocarbon correction factor in the sediment depends on the amount and apparent age of the penguin guano washed down into the lake, and the amount of particulate carbon from the watershed present in the sediment. Neither the "old" meltwater from the glaciers nor dissolved carbonates contributes significantly to the correction factor. The model is used to achieve more accurate radiocarbon dates of the Lake Boeckella sediment. This model, or a modified version, may contribute to a higher dating accuracy and a better understanding of the dating problems in Antarctica. Deglaciation dates, as well as data on the climatic and environmental history of Byers Peninsula on Livingston Island, South Shetland Islands, of Hope Bay, Antarctic Peninsula and of Hidden Lake area, James Ross Island are given. Diss. (sammanfattning) Umeå : Umeå universitet, 1993, härtill 6 uppsatser. digitalisering@umu |
format |
Doctoral or Postdoctoral Thesis |
author |
Zale, Rolf |
author_facet |
Zale, Rolf |
author_sort |
Zale, Rolf |
title |
Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
title_short |
Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
title_full |
Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
title_fullStr |
Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
title_full_unstemmed |
Lake sediments around the Antarctic Peninsula : archives of climatic and environmental changes |
title_sort |
lake sediments around the antarctic peninsula : archives of climatic and environmental changes |
publisher |
Umeå universitet |
publishDate |
1993 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96890 |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(141.604,141.604,-66.775,-66.775) ENVELOPE(63.048,63.048,-67.687,-67.687) ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-57.000,-57.000,-63.400,-63.400) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Boeckella Byers Byers peninsula Deception Island Guano Hidden Lake Hope Bay Lake Boeckella Livingston Island Ross Island South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Boeckella Byers Byers peninsula Deception Island Guano Hidden Lake Hope Bay Lake Boeckella Livingston Island Ross Island South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island James Ross Island Livingston Island Ross Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Deception Island James Ross Island Livingston Island Ross Island South Shetland Islands |
op_relation |
GERUM. Naturgeografi, 0282-5597 17 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96890 urn:isbn:91-7174-790-7 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1779316897711390720 |