Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co
The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local enviro...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10278/3708304 https://doi.org/10.5194/cp-14-1543-2018 http://www.clim-past.net/volumes_and_issues.html |
id |
ftuniveneziairis:oai:iris.unive.it:10278/3708304 |
---|---|
record_format |
openpolar |
spelling |
ftuniveneziairis:oai:iris.unive.it:10278/3708304 2024-04-14T08:13:07+00:00 Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo 2018 http://hdl.handle.net/10278/3708304 https://doi.org/10.5194/cp-14-1543-2018 http://www.clim-past.net/volumes_and_issues.html eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000449023500001 volume:14 issue:10 firstpage:1543 lastpage:1563 numberofpages:21 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3708304 doi:10.5194/cp-14-1543-2018 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85055585149 http://www.clim-past.net/volumes_and_issues.html info:eu-repo/semantics/openAccess Global and Planetary Change Stratigraphy Paleontology Settore CHIM/01 - Chimica Analitica info:eu-repo/semantics/article 2018 ftuniveneziairis https://doi.org/10.5194/cp-14-1543-2018 2024-03-21T18:09:06Z The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local environmental change on millennial scales during the Holocene through the accumulation and preservation of specific organic molecular biomarkers. To reconstruct Holocene fire events and vegetation changes occurring on the southeastern Tibetan Plateau and the surrounding areas, we used a multi-proxy approach, investigating multiple biomarkers preserved in core sediment samples retrieved from Paru Co, a small lake located in the Nyainqentanglha Mountains (29°47045.600N, 92°21007.200 E; 4845ma.s.l.). Biomarkers include n-alkanes as indicators of vegetation, polycyclic aromatic hydrocarbons (PAHs) as combustion proxies, fecal sterols and stanols (FeSts) as indicators of the presence of humans or grazing animals, and finally monosaccharide anhydrides (MAs) as specific markers of vegetation burning processes. Insolation changes and the associated influence on the Indian summer monsoon (ISM) affect the vegetation distribution and fire types recorded in Paru Co throughout the Holocene. The early Holocene (10.7- 7.5 cal kyr BP) n-alkane ratios demonstrate oscillations between grass and conifer communities, resulting in respective smouldering fires represented by levoglucosan peaks, and high-temperature fires represented by high-molecular-weight PAHs. Forest cover increases with a strengthened ISM, where coincident high levoglucosan to mannosan (L = M) ratios are consistent with conifer burning. The decrease in the ISM at 4.2 cal kyr BP corresponds with the expansion of regional civilizations, although the lack of human FeSts above the method detection limits excludes local anthropogenic influence on fire and vegetation changes. The late Holocene is characterized by a relatively shallow lake surrounded by grassland, where all ... Article in Journal/Newspaper ice core Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Indian Climate of the Past 14 10 1543 1563 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Global and Planetary Change Stratigraphy Paleontology Settore CHIM/01 - Chimica Analitica |
spellingShingle |
Global and Planetary Change Stratigraphy Paleontology Settore CHIM/01 - Chimica Analitica Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
topic_facet |
Global and Planetary Change Stratigraphy Paleontology Settore CHIM/01 - Chimica Analitica |
description |
The fire history of the Tibetan Plateau over centennial to millennial timescales is not well known. Recent ice core studies reconstruct fire history over the past few decades but do not extend through the Holocene. Lacustrine sedimentary cores, however, can provide continuous records of local environmental change on millennial scales during the Holocene through the accumulation and preservation of specific organic molecular biomarkers. To reconstruct Holocene fire events and vegetation changes occurring on the southeastern Tibetan Plateau and the surrounding areas, we used a multi-proxy approach, investigating multiple biomarkers preserved in core sediment samples retrieved from Paru Co, a small lake located in the Nyainqentanglha Mountains (29°47045.600N, 92°21007.200 E; 4845ma.s.l.). Biomarkers include n-alkanes as indicators of vegetation, polycyclic aromatic hydrocarbons (PAHs) as combustion proxies, fecal sterols and stanols (FeSts) as indicators of the presence of humans or grazing animals, and finally monosaccharide anhydrides (MAs) as specific markers of vegetation burning processes. Insolation changes and the associated influence on the Indian summer monsoon (ISM) affect the vegetation distribution and fire types recorded in Paru Co throughout the Holocene. The early Holocene (10.7- 7.5 cal kyr BP) n-alkane ratios demonstrate oscillations between grass and conifer communities, resulting in respective smouldering fires represented by levoglucosan peaks, and high-temperature fires represented by high-molecular-weight PAHs. Forest cover increases with a strengthened ISM, where coincident high levoglucosan to mannosan (L = M) ratios are consistent with conifer burning. The decrease in the ISM at 4.2 cal kyr BP corresponds with the expansion of regional civilizations, although the lack of human FeSts above the method detection limits excludes local anthropogenic influence on fire and vegetation changes. The late Holocene is characterized by a relatively shallow lake surrounded by grassland, where all ... |
author2 |
Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo |
format |
Article in Journal/Newspaper |
author |
Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo |
author_facet |
Callegaro, Alice Battistel, Dario Kehrwald, Natalie M. Matsubara Pereira, Felipe Kirchgeorg, Torben VILLOSLADA HIDALGO, MARIA DEL CARMEN Bird, Broxton W. Barbante, Carlo |
author_sort |
Callegaro, Alice |
title |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
title_short |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
title_full |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
title_fullStr |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
title_full_unstemmed |
Fire, vegetation, and Holocene climate in a southeastern Tibetan lake: A multi-biomarker reconstruction from Paru Co |
title_sort |
fire, vegetation, and holocene climate in a southeastern tibetan lake: a multi-biomarker reconstruction from paru co |
publishDate |
2018 |
url |
http://hdl.handle.net/10278/3708304 https://doi.org/10.5194/cp-14-1543-2018 http://www.clim-past.net/volumes_and_issues.html |
geographic |
Indian |
geographic_facet |
Indian |
genre |
ice core |
genre_facet |
ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000449023500001 volume:14 issue:10 firstpage:1543 lastpage:1563 numberofpages:21 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3708304 doi:10.5194/cp-14-1543-2018 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85055585149 http://www.clim-past.net/volumes_and_issues.html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-14-1543-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
10 |
container_start_page |
1543 |
op_container_end_page |
1563 |
_version_ |
1796311032961957888 |