Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years
In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to the progressively weakening influence of the mid-latitude Westerlies on regional climate. However, as the spatio-temporal pattern of this development and the underlying climatic me...
Published in: | The Holocene |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2014
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1177/0959683614534741 http://journals.sagepub.com/doi/pdf/10.1177/0959683614534741 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614534741 |
id |
crsagepubl:10.1177/0959683614534741 |
---|---|
record_format |
openpolar |
spelling |
crsagepubl:10.1177/0959683614534741 2024-09-15T18:22:03+00:00 Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years Lauterbach, Stefan Witt, Roman Plessen, Birgit Dulski, Peter Prasad, Sushma Mingram, Jens Gleixner, Gerd Hettler-Riedel, Sabine Stebich, Martina Schnetger, Bernhard Schwalb, Antje Schwarz, Anja 2014 http://dx.doi.org/10.1177/0959683614534741 http://journals.sagepub.com/doi/pdf/10.1177/0959683614534741 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614534741 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 24, issue 8, page 970-984 ISSN 0959-6836 1477-0911 journal-article 2014 crsagepubl https://doi.org/10.1177/0959683614534741 2024-07-29T04:24:32Z In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to the progressively weakening influence of the mid-latitude Westerlies on regional climate. However, as the spatio-temporal pattern of this development and the underlying climatic mechanisms are yet not fully understood, new high-resolution paleoclimate records from this region are needed. Within this study, a sediment core from Lake Son Kol (Central Kyrgyzstan) was investigated using sedimentological, (bio)geochemical, isotopic, and palynological analyses, aiming at reconstructing regional climate development during the last 6000 years. Biogeochemical data, mainly reflecting summer moisture conditions, indicate predominantly wet conditions until 4950 cal. yr BP, succeeded by a pronounced dry interval between 4950 and 3900 cal. yr BP. In the following, a return to wet conditions and a subsequent moderate drying trend until present times are observed. This is consistent with other regional paleoclimate records and likely reflects the gradual Late Holocene diminishment of the amount of summer moisture provided by the mid-latitude Westerlies. However, climate impact of the Westerlies was apparently not only restricted to the summer season but also significant during winter as indicated by recurrent episodes of enhanced allochthonous input through snowmelt, occurring before 6000 cal. yr BP and at 5100–4350, 3450–2850, and 1900–1500 cal. yr BP. The distinct ~1500-year periodicity of these episodes of increased winter precipitation in Central Kyrgyzstan resembles similar cyclicities observed in paleoclimate records around the North Atlantic, likely indicating a hemispheric-scale climatic teleconnection and an impact of North Atlantic Oscillation (NAO) variability in Central Asia. Article in Journal/Newspaper North Atlantic North Atlantic oscillation SAGE Publications The Holocene 24 8 970 984 |
institution |
Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
description |
In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to the progressively weakening influence of the mid-latitude Westerlies on regional climate. However, as the spatio-temporal pattern of this development and the underlying climatic mechanisms are yet not fully understood, new high-resolution paleoclimate records from this region are needed. Within this study, a sediment core from Lake Son Kol (Central Kyrgyzstan) was investigated using sedimentological, (bio)geochemical, isotopic, and palynological analyses, aiming at reconstructing regional climate development during the last 6000 years. Biogeochemical data, mainly reflecting summer moisture conditions, indicate predominantly wet conditions until 4950 cal. yr BP, succeeded by a pronounced dry interval between 4950 and 3900 cal. yr BP. In the following, a return to wet conditions and a subsequent moderate drying trend until present times are observed. This is consistent with other regional paleoclimate records and likely reflects the gradual Late Holocene diminishment of the amount of summer moisture provided by the mid-latitude Westerlies. However, climate impact of the Westerlies was apparently not only restricted to the summer season but also significant during winter as indicated by recurrent episodes of enhanced allochthonous input through snowmelt, occurring before 6000 cal. yr BP and at 5100–4350, 3450–2850, and 1900–1500 cal. yr BP. The distinct ~1500-year periodicity of these episodes of increased winter precipitation in Central Kyrgyzstan resembles similar cyclicities observed in paleoclimate records around the North Atlantic, likely indicating a hemispheric-scale climatic teleconnection and an impact of North Atlantic Oscillation (NAO) variability in Central Asia. |
format |
Article in Journal/Newspaper |
author |
Lauterbach, Stefan Witt, Roman Plessen, Birgit Dulski, Peter Prasad, Sushma Mingram, Jens Gleixner, Gerd Hettler-Riedel, Sabine Stebich, Martina Schnetger, Bernhard Schwalb, Antje Schwarz, Anja |
spellingShingle |
Lauterbach, Stefan Witt, Roman Plessen, Birgit Dulski, Peter Prasad, Sushma Mingram, Jens Gleixner, Gerd Hettler-Riedel, Sabine Stebich, Martina Schnetger, Bernhard Schwalb, Antje Schwarz, Anja Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
author_facet |
Lauterbach, Stefan Witt, Roman Plessen, Birgit Dulski, Peter Prasad, Sushma Mingram, Jens Gleixner, Gerd Hettler-Riedel, Sabine Stebich, Martina Schnetger, Bernhard Schwalb, Antje Schwarz, Anja |
author_sort |
Lauterbach, Stefan |
title |
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
title_short |
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
title_full |
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
title_fullStr |
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
title_full_unstemmed |
Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years |
title_sort |
climatic imprint of the mid-latitude westerlies in the central tian shan of kyrgyzstan and teleconnections to north atlantic climate variability during the last 6000 years |
publisher |
SAGE Publications |
publishDate |
2014 |
url |
http://dx.doi.org/10.1177/0959683614534741 http://journals.sagepub.com/doi/pdf/10.1177/0959683614534741 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614534741 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
The Holocene volume 24, issue 8, page 970-984 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683614534741 |
container_title |
The Holocene |
container_volume |
24 |
container_issue |
8 |
container_start_page |
970 |
op_container_end_page |
984 |
_version_ |
1810461351867318272 |