Arctic lake sediments as paleoclimatic archives
The important data for the understanding of climate fluctuations and the related environment changes since the Late Weichselian were obtained by the study of lacustrine cores from the Russian Arctic. It has been proved that such continuous records provide the high-resolution environmental history up...
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ftawi:oai:epic.awi.de:12164 2023-09-05T13:15:40+02:00 Arctic lake sediments as paleoclimatic archives Andreev, Andrei 2005 https://epic.awi.de/id/eprint/12164/ https://hdl.handle.net/10013/epic.22597 unknown Andreev, A. orcid:0000-0002-8745-9636 (2005) Arctic lake sediments as paleoclimatic archives , Geooekologischen Kolloquium in Beureuth UniversiätJanuary . hdl:10013/epic.22597 EPIC3Geooekologischen Kolloquium in Beureuth UniversiätJanuary, 27, 2005 p. Conference notRev 2005 ftawi 2023-08-22T19:49:48Z The important data for the understanding of climate fluctuations and the related environment changes since the Late Weichselian were obtained by the study of lacustrine cores from the Russian Arctic. It has been proved that such continuous records provide the high-resolution environmental history up to the 30,000 years. Although, they are mostly not yearly, but decade or centennial resolution records, they are only available data from vast Eurasian regions, providing a base to reconstruct climate variability on time scales from decades to hundreds or thousands of years.Several lake cores from the Lake Lyadhej-To (68°15'N, 65°45'E) situated at the NW rim of the Polar Ural to the Lake Nikolay (73°20N, 124°12E) from Arga Island in the Lena River Delta. Three statistical approaches were used to reconstruct climate from the pollen records: the Best Modern Analogue method (Guiot, 1990), the Plant Functional Types method (Peyron et al., 1998) is based on the biomization concept of Prentice et al. (1996) and Information-Statistical method (Klimanov, 1976, 1984). The methods show comparable results in reconstruction of thermal and hydrological changes during the last 10,000 years. The time of maximum warmth took place during the Early-Middle Holocene. The differences are relatively small compared to the statistical errors of the reconstructions.Surface pollen spectra tests demonstrate that the Best Modern Analogue method reconstructs modern climate variables at Arctic with a reasonably high accuracy (Tarasov et al. 2002). Correlation coefficients between reconstructed and calculated climate variables have suggested that TVII and annual sum of the day temperatures above 5ºC (the so-called sum of growing-degree-days with temperatures above 5ºC) can be reconstructed with reasonably high confidence (R=0.80 and 0.82 respectively). Among the other tested variables P and runoff (difference between P and evaporation (E)) were reconstructed from the modern spectra with relatively high accuracy (R=0.68 and 0.61 respectively). Conference Object Arctic Arctic lena river Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Arga ENVELOPE(149.783,149.783,66.500,66.500) Nikolay ENVELOPE(140.000,140.000,71.617,71.617) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
The important data for the understanding of climate fluctuations and the related environment changes since the Late Weichselian were obtained by the study of lacustrine cores from the Russian Arctic. It has been proved that such continuous records provide the high-resolution environmental history up to the 30,000 years. Although, they are mostly not yearly, but decade or centennial resolution records, they are only available data from vast Eurasian regions, providing a base to reconstruct climate variability on time scales from decades to hundreds or thousands of years.Several lake cores from the Lake Lyadhej-To (68°15'N, 65°45'E) situated at the NW rim of the Polar Ural to the Lake Nikolay (73°20N, 124°12E) from Arga Island in the Lena River Delta. Three statistical approaches were used to reconstruct climate from the pollen records: the Best Modern Analogue method (Guiot, 1990), the Plant Functional Types method (Peyron et al., 1998) is based on the biomization concept of Prentice et al. (1996) and Information-Statistical method (Klimanov, 1976, 1984). The methods show comparable results in reconstruction of thermal and hydrological changes during the last 10,000 years. The time of maximum warmth took place during the Early-Middle Holocene. The differences are relatively small compared to the statistical errors of the reconstructions.Surface pollen spectra tests demonstrate that the Best Modern Analogue method reconstructs modern climate variables at Arctic with a reasonably high accuracy (Tarasov et al. 2002). Correlation coefficients between reconstructed and calculated climate variables have suggested that TVII and annual sum of the day temperatures above 5ºC (the so-called sum of growing-degree-days with temperatures above 5ºC) can be reconstructed with reasonably high confidence (R=0.80 and 0.82 respectively). Among the other tested variables P and runoff (difference between P and evaporation (E)) were reconstructed from the modern spectra with relatively high accuracy (R=0.68 and 0.61 respectively). |
format |
Conference Object |
author |
Andreev, Andrei |
spellingShingle |
Andreev, Andrei Arctic lake sediments as paleoclimatic archives |
author_facet |
Andreev, Andrei |
author_sort |
Andreev, Andrei |
title |
Arctic lake sediments as paleoclimatic archives |
title_short |
Arctic lake sediments as paleoclimatic archives |
title_full |
Arctic lake sediments as paleoclimatic archives |
title_fullStr |
Arctic lake sediments as paleoclimatic archives |
title_full_unstemmed |
Arctic lake sediments as paleoclimatic archives |
title_sort |
arctic lake sediments as paleoclimatic archives |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/12164/ https://hdl.handle.net/10013/epic.22597 |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(149.783,149.783,66.500,66.500) ENVELOPE(140.000,140.000,71.617,71.617) |
geographic |
Arctic Arctic Lake Arga Nikolay |
geographic_facet |
Arctic Arctic Lake Arga Nikolay |
genre |
Arctic Arctic lena river |
genre_facet |
Arctic Arctic lena river |
op_source |
EPIC3Geooekologischen Kolloquium in Beureuth UniversiätJanuary, 27, 2005 p. |
op_relation |
Andreev, A. orcid:0000-0002-8745-9636 (2005) Arctic lake sediments as paleoclimatic archives , Geooekologischen Kolloquium in Beureuth UniversiätJanuary . hdl:10013/epic.22597 |
_version_ |
1776197520849895424 |