Use of principal component analysis to extract environmental information from lake water isotopic compositions
Abstract Lake water hydrogen (δD) and oxygen (δ 18 O) isotopic ratios have been widely used to study the hydrologic cycle. In a given region, δD and δ 18 O values from multiple lakes are often correlated and define a local evaporation line (LEL). The slope of and extension of each lake along this li...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2018
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/lno.10776 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10776 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10776 |
id |
crwiley:10.1002/lno.10776 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/lno.10776 2024-06-02T08:07:35+00:00 Use of principal component analysis to extract environmental information from lake water isotopic compositions Kopec, B. G. Feng, X. Posmentier, E. S. Chipman, J. W. Virginia, R. A. National Science Foundation 2018 http://dx.doi.org/10.1002/lno.10776 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10776 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10776 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 63, issue 3, page 1340-1354 ISSN 0024-3590 1939-5590 journal-article 2018 crwiley https://doi.org/10.1002/lno.10776 2024-05-06T07:01:42Z Abstract Lake water hydrogen (δD) and oxygen (δ 18 O) isotopic ratios have been widely used to study the hydrologic cycle. In a given region, δD and δ 18 O values from multiple lakes are often correlated and define a local evaporation line (LEL). The slope of and extension of each lake along this line contain information of many variables with entangled effects of important lake fluxes (e.g., evaporation). We present a new method to extract regional and local (a particular lake) environmental information based on principal component analyses (PCAs) of the δD‐δ 18 O relationships. Water of up to 30 lakes in West Greenland was sampled every summer for 5 yr, and measured for δD and δ 18 O values. For a given year, PCA yields values of the first (Enrichment) and second (Deviance) principal components for each lake. In addition, we obtain the slope of the line along the first eigenvector, which is similar, but not identical, to the LEL. We refer to this line as the regional isotopic enrichment line (RIEL), and demonstrate that the RIEL slope changes interannually with the dominant atmospheric circulation patterns affecting regional humidity, specifically the North Atlantic Oscillation and frequency of sea breezes. The Deviance of a lake correlates strongly with its longitude and surface area, both of which influence local humidity and isotopic ratios of vapor. Conversely, Enrichment carries little extractable environmental information because it is controlled by many variables of competing effects. This method can be widely applied to both modern hydrological studies and paleoclimate reconstructions using lake sediments. Article in Journal/Newspaper Greenland North Atlantic North Atlantic oscillation Wiley Online Library Greenland Limnology and Oceanography 63 3 1340 1354 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Lake water hydrogen (δD) and oxygen (δ 18 O) isotopic ratios have been widely used to study the hydrologic cycle. In a given region, δD and δ 18 O values from multiple lakes are often correlated and define a local evaporation line (LEL). The slope of and extension of each lake along this line contain information of many variables with entangled effects of important lake fluxes (e.g., evaporation). We present a new method to extract regional and local (a particular lake) environmental information based on principal component analyses (PCAs) of the δD‐δ 18 O relationships. Water of up to 30 lakes in West Greenland was sampled every summer for 5 yr, and measured for δD and δ 18 O values. For a given year, PCA yields values of the first (Enrichment) and second (Deviance) principal components for each lake. In addition, we obtain the slope of the line along the first eigenvector, which is similar, but not identical, to the LEL. We refer to this line as the regional isotopic enrichment line (RIEL), and demonstrate that the RIEL slope changes interannually with the dominant atmospheric circulation patterns affecting regional humidity, specifically the North Atlantic Oscillation and frequency of sea breezes. The Deviance of a lake correlates strongly with its longitude and surface area, both of which influence local humidity and isotopic ratios of vapor. Conversely, Enrichment carries little extractable environmental information because it is controlled by many variables of competing effects. This method can be widely applied to both modern hydrological studies and paleoclimate reconstructions using lake sediments. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Kopec, B. G. Feng, X. Posmentier, E. S. Chipman, J. W. Virginia, R. A. |
spellingShingle |
Kopec, B. G. Feng, X. Posmentier, E. S. Chipman, J. W. Virginia, R. A. Use of principal component analysis to extract environmental information from lake water isotopic compositions |
author_facet |
Kopec, B. G. Feng, X. Posmentier, E. S. Chipman, J. W. Virginia, R. A. |
author_sort |
Kopec, B. G. |
title |
Use of principal component analysis to extract environmental information from lake water isotopic compositions |
title_short |
Use of principal component analysis to extract environmental information from lake water isotopic compositions |
title_full |
Use of principal component analysis to extract environmental information from lake water isotopic compositions |
title_fullStr |
Use of principal component analysis to extract environmental information from lake water isotopic compositions |
title_full_unstemmed |
Use of principal component analysis to extract environmental information from lake water isotopic compositions |
title_sort |
use of principal component analysis to extract environmental information from lake water isotopic compositions |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/lno.10776 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10776 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10776 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic North Atlantic oscillation |
genre_facet |
Greenland North Atlantic North Atlantic oscillation |
op_source |
Limnology and Oceanography volume 63, issue 3, page 1340-1354 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.10776 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
3 |
container_start_page |
1340 |
op_container_end_page |
1354 |
_version_ |
1800752689722687488 |