Determination of pollen accumulation rates in frozen sediments
Pollen accumulation rates (PAR) of 48 samples from a permafrost core were calibrated to assess the influence of ice lensing on the calculations. Results show that permafrost formation can radically change PAR values. Accumulation of segregated ice is a major source of error, while the 9% volumetric...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.3430040108 |
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ftrepec:oai:RePEc:wly:perpro:v:4:y:1993:i:1:p:87-93 2023-05-15T16:37:08+02:00 Determination of pollen accumulation rates in frozen sediments Xia‐Cheng Wang Marie‐Anne Geurts https://doi.org/10.1002/ppp.3430040108 unknown https://doi.org/10.1002/ppp.3430040108 article ftrepec https://doi.org/10.1002/ppp.3430040108 2020-12-04T13:31:25Z Pollen accumulation rates (PAR) of 48 samples from a permafrost core were calibrated to assess the influence of ice lensing on the calculations. Results show that permafrost formation can radically change PAR values. Accumulation of segregated ice is a major source of error, while the 9% volumetric expansion of pore water upon freezing must also be considered. The basic result of these influences is the exaggeration of sedimentation rates and sample volumes. Des vitesses d'accumulation de pollen (PAR) de 48 échantillons d'un sondage creusé dans le pergélisol ont été calibrées pour éliminer dans les calculs l'influence de la croissance des lentilles de glace. Les résultats montrent que la formation d'un pergélisol peut changer radicalement les valeurs de ce coefficient (PAR). L'accumulation de glace de ségrégation est une source majeure d'erreur mais l'expansion volumétrique de 9% de l'eau des pores doit aussi ětre considérée. Le résultat de ces influences est d'exagérer les vitesses de sédimentation et les volumes de échantillons. Article in Journal/Newspaper Ice permafrost pergélisol RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 4 1 87 93 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
Pollen accumulation rates (PAR) of 48 samples from a permafrost core were calibrated to assess the influence of ice lensing on the calculations. Results show that permafrost formation can radically change PAR values. Accumulation of segregated ice is a major source of error, while the 9% volumetric expansion of pore water upon freezing must also be considered. The basic result of these influences is the exaggeration of sedimentation rates and sample volumes. Des vitesses d'accumulation de pollen (PAR) de 48 échantillons d'un sondage creusé dans le pergélisol ont été calibrées pour éliminer dans les calculs l'influence de la croissance des lentilles de glace. Les résultats montrent que la formation d'un pergélisol peut changer radicalement les valeurs de ce coefficient (PAR). L'accumulation de glace de ségrégation est une source majeure d'erreur mais l'expansion volumétrique de 9% de l'eau des pores doit aussi ětre considérée. Le résultat de ces influences est d'exagérer les vitesses de sédimentation et les volumes de échantillons. |
format |
Article in Journal/Newspaper |
author |
Xia‐Cheng Wang Marie‐Anne Geurts |
spellingShingle |
Xia‐Cheng Wang Marie‐Anne Geurts Determination of pollen accumulation rates in frozen sediments |
author_facet |
Xia‐Cheng Wang Marie‐Anne Geurts |
author_sort |
Xia‐Cheng Wang |
title |
Determination of pollen accumulation rates in frozen sediments |
title_short |
Determination of pollen accumulation rates in frozen sediments |
title_full |
Determination of pollen accumulation rates in frozen sediments |
title_fullStr |
Determination of pollen accumulation rates in frozen sediments |
title_full_unstemmed |
Determination of pollen accumulation rates in frozen sediments |
title_sort |
determination of pollen accumulation rates in frozen sediments |
url |
https://doi.org/10.1002/ppp.3430040108 |
genre |
Ice permafrost pergélisol |
genre_facet |
Ice permafrost pergélisol |
op_relation |
https://doi.org/10.1002/ppp.3430040108 |
op_doi |
https://doi.org/10.1002/ppp.3430040108 |
container_title |
Permafrost and Periglacial Processes |
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4 |
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1 |
container_start_page |
87 |
op_container_end_page |
93 |
_version_ |
1766027434705027072 |