Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression
We present a procedure for estimating age-depth relationships in stratigraphical sequences by means of it generalized mixed-effect regression using an ancillary function for the partitioning of the fixed effect and the random effect corresponding to the degree of representativity of the individual c...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
ARNOLD, HODDER HEADLINE PLC
2005
|
Subjects: | |
Online Access: | http://discovery.ucl.ac.uk/156819/ |
id |
ftucl:oai:eprints.ucl.ac.uk.OAI2:156819 |
---|---|
record_format |
openpolar |
spelling |
ftucl:oai:eprints.ucl.ac.uk.OAI2:156819 2023-05-15T17:44:41+02:00 Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression Heegaard, E Birks, HJB Telford, RJ 2005-05 http://discovery.ucl.ac.uk/156819/ unknown ARNOLD, HODDER HEADLINE PLC HOLOCENE , 15 (4) 612 - 618. (2005) sediment sequences age-depth relationships GAM mixed effects calibrated ages TREE-LINE AREA CLIMATE RECONSTRUCTIONS NORTHERN SWEDEN HOLOCENE POLLEN LAKE TEMPERATURE PROGRAM Article 2005 ftucl 2016-01-21T23:13:24Z We present a procedure for estimating age-depth relationships in stratigraphical sequences by means of it generalized mixed-effect regression using an ancillary function for the partitioning of the fixed effect and the random effect corresponding to the degree of representativity of the individual calibrated dates for a particular section of the sedimentary sequence. The procedure uses mid-point estimates of the calibrated ages in combination with the central distributional range as the basis for estimating the fixed relationship between age and depth. Further, it combines the variability of the calibrated age at individual layers (within-object variance) with estimation of the variability of the calibrated age distribution as a whole between the layers standardized by the fixed effect (between-object variance). These components of random variability can be considered independent, and hence the uncertainty of the estimated fixed relationship between age and depth can be estimated by combining the two random variables. The procedure follows the logic of mixed-effects models, but with prior information about the expected variance within each dated object. Article in Journal/Newspaper Northern Sweden University College London: UCL Discovery Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
sediment sequences age-depth relationships GAM mixed effects calibrated ages TREE-LINE AREA CLIMATE RECONSTRUCTIONS NORTHERN SWEDEN HOLOCENE POLLEN LAKE TEMPERATURE PROGRAM |
spellingShingle |
sediment sequences age-depth relationships GAM mixed effects calibrated ages TREE-LINE AREA CLIMATE RECONSTRUCTIONS NORTHERN SWEDEN HOLOCENE POLLEN LAKE TEMPERATURE PROGRAM Heegaard, E Birks, HJB Telford, RJ Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
topic_facet |
sediment sequences age-depth relationships GAM mixed effects calibrated ages TREE-LINE AREA CLIMATE RECONSTRUCTIONS NORTHERN SWEDEN HOLOCENE POLLEN LAKE TEMPERATURE PROGRAM |
description |
We present a procedure for estimating age-depth relationships in stratigraphical sequences by means of it generalized mixed-effect regression using an ancillary function for the partitioning of the fixed effect and the random effect corresponding to the degree of representativity of the individual calibrated dates for a particular section of the sedimentary sequence. The procedure uses mid-point estimates of the calibrated ages in combination with the central distributional range as the basis for estimating the fixed relationship between age and depth. Further, it combines the variability of the calibrated age at individual layers (within-object variance) with estimation of the variability of the calibrated age distribution as a whole between the layers standardized by the fixed effect (between-object variance). These components of random variability can be considered independent, and hence the uncertainty of the estimated fixed relationship between age and depth can be estimated by combining the two random variables. The procedure follows the logic of mixed-effects models, but with prior information about the expected variance within each dated object. |
format |
Article in Journal/Newspaper |
author |
Heegaard, E Birks, HJB Telford, RJ |
author_facet |
Heegaard, E Birks, HJB Telford, RJ |
author_sort |
Heegaard, E |
title |
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
title_short |
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
title_full |
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
title_fullStr |
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
title_full_unstemmed |
Relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
title_sort |
relationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regression |
publisher |
ARNOLD, HODDER HEADLINE PLC |
publishDate |
2005 |
url |
http://discovery.ucl.ac.uk/156819/ |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Gam |
geographic_facet |
Gam |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
HOLOCENE , 15 (4) 612 - 618. (2005) |
_version_ |
1766146945970077696 |