An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania
Tropical El Ni~no Southern Oscillation (ENSO) is an important influence on natural systems and cultural change across the Pacific Ocean basin. El Ni~no events result in negative moisture anomalies in the southwest Pacific and are implicated in droughts and catastrophic wildfires across eastern Austr...
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Online Access: | https://eprints.lincoln.ac.uk/id/eprint/32128/ https://eprints.lincoln.ac.uk/id/eprint/32128/1/Beck%20et%20al%20Paddy%27s%20Lake%20pollen_REVISED_manuscript_FINAL.pdf https://eprints.lincoln.ac.uk/id/eprint/32128/3/K%20Beck%20-%20An%20early%20onset%20of%20ENSO.docx https://doi.org/10.1016/j.quascirev.2016.12.001 |
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ftulincoln:oai:eprints.lincoln.ac.uk:32128 2023-05-15T13:40:43+02:00 An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania Beck, Kristen Fletcher, Michael-Shawn Gadd, Patricia S. Heijnis, Henk Jacobsen, Geraldine E. 2017-01 application/pdf application/msword https://eprints.lincoln.ac.uk/id/eprint/32128/ https://eprints.lincoln.ac.uk/id/eprint/32128/1/Beck%20et%20al%20Paddy%27s%20Lake%20pollen_REVISED_manuscript_FINAL.pdf https://eprints.lincoln.ac.uk/id/eprint/32128/3/K%20Beck%20-%20An%20early%20onset%20of%20ENSO.docx https://doi.org/10.1016/j.quascirev.2016.12.001 en eng https://eprints.lincoln.ac.uk/id/eprint/32128/1/Beck%20et%20al%20Paddy%27s%20Lake%20pollen_REVISED_manuscript_FINAL.pdf https://eprints.lincoln.ac.uk/id/eprint/32128/3/K%20Beck%20-%20An%20early%20onset%20of%20ENSO.docx Beck, Kristen, Fletcher, Michael-Shawn, Gadd, Patricia S., Heijnis, Henk and Jacobsen, Geraldine E. (2017) An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania. Quaternary Science Reviews, 157 . pp. 164-175. ISSN 0277-3791 doi:10.1016/j.quascirev.2016.12.001 cc_by_nc_nd4 CC-BY-NC-ND F840 Physical Geography Article PeerReviewed 2017 ftulincoln https://doi.org/10.1016/j.quascirev.2016.12.001 2022-03-02T20:10:26Z Tropical El Ni~no Southern Oscillation (ENSO) is an important influence on natural systems and cultural change across the Pacific Ocean basin. El Ni~no events result in negative moisture anomalies in the southwest Pacific and are implicated in droughts and catastrophic wildfires across eastern Australia. An amplification of tropical El Ni~no activity is reported in the east Pacific after ca. 6.7 ka; however, proxy data for ENSO-driven environmental change in Australia suggest an initial influence only after ca. 5 ka. Here, we reconstruct changes in vegetation, fire activity and catchment dynamics (e.g. erosion) over the last 14.6 ka from part of the southwest Pacific in which ENSO is the main control of interannual hydroclimatic variability: Paddy's Lake, in northwest Tasmania (1065 masl), Australia. Our multi-proxy approach includes analyses of charcoal, pollen, geochemistry and radioactive isotopes. Our results reveal a high sensitivity of the local and regional vegetation to climatic change, with an increase of nonarboreal pollen between ca. 14.6e13.3 ka synchronous with the Antarctic Cold Reversal, and a sensitivity of the local vegetation and fire activity to ENSO variability recorded in the tropical east Pacific through the Holocene. We detect local-scale shifts in vegetation, fire and sediment geochemistry at ca. 6.3, 4.8 and 3.4 ka, simultaneous with increases in El Ni~no activity in the tropical Pacific. Finally, we observe a fire-driven shift in vegetation from a pyrophobic association dominated by rainforest elements to a pyrogenic association dominated by sclerophyllous taxa following a prolonged (>1 ka) phase of tropical ENSO-amplification and a major local fire event at ca. 3.4 ka. Our results reveal the following key insights: (1) that ENSO has been a persistent modulator of southwest Pacific climate and fire activity through the Holocene; (2) that the climate of northwest Tasmania is sensitive to long-term shifts in tropical ENSO variability; and (3) that there has been possible stationarity in the spatial influence of ENSO over this region through the Holocene. Article in Journal/Newspaper Antarc* Antarctic University of Lincoln: Lincoln Repository Antarctic The Antarctic Pacific Quaternary Science Reviews 157 164 175 |
institution |
Open Polar |
collection |
University of Lincoln: Lincoln Repository |
op_collection_id |
ftulincoln |
language |
English |
topic |
F840 Physical Geography |
spellingShingle |
F840 Physical Geography Beck, Kristen Fletcher, Michael-Shawn Gadd, Patricia S. Heijnis, Henk Jacobsen, Geraldine E. An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
topic_facet |
F840 Physical Geography |
description |
Tropical El Ni~no Southern Oscillation (ENSO) is an important influence on natural systems and cultural change across the Pacific Ocean basin. El Ni~no events result in negative moisture anomalies in the southwest Pacific and are implicated in droughts and catastrophic wildfires across eastern Australia. An amplification of tropical El Ni~no activity is reported in the east Pacific after ca. 6.7 ka; however, proxy data for ENSO-driven environmental change in Australia suggest an initial influence only after ca. 5 ka. Here, we reconstruct changes in vegetation, fire activity and catchment dynamics (e.g. erosion) over the last 14.6 ka from part of the southwest Pacific in which ENSO is the main control of interannual hydroclimatic variability: Paddy's Lake, in northwest Tasmania (1065 masl), Australia. Our multi-proxy approach includes analyses of charcoal, pollen, geochemistry and radioactive isotopes. Our results reveal a high sensitivity of the local and regional vegetation to climatic change, with an increase of nonarboreal pollen between ca. 14.6e13.3 ka synchronous with the Antarctic Cold Reversal, and a sensitivity of the local vegetation and fire activity to ENSO variability recorded in the tropical east Pacific through the Holocene. We detect local-scale shifts in vegetation, fire and sediment geochemistry at ca. 6.3, 4.8 and 3.4 ka, simultaneous with increases in El Ni~no activity in the tropical Pacific. Finally, we observe a fire-driven shift in vegetation from a pyrophobic association dominated by rainforest elements to a pyrogenic association dominated by sclerophyllous taxa following a prolonged (>1 ka) phase of tropical ENSO-amplification and a major local fire event at ca. 3.4 ka. Our results reveal the following key insights: (1) that ENSO has been a persistent modulator of southwest Pacific climate and fire activity through the Holocene; (2) that the climate of northwest Tasmania is sensitive to long-term shifts in tropical ENSO variability; and (3) that there has been possible stationarity in the spatial influence of ENSO over this region through the Holocene. |
format |
Article in Journal/Newspaper |
author |
Beck, Kristen Fletcher, Michael-Shawn Gadd, Patricia S. Heijnis, Henk Jacobsen, Geraldine E. |
author_facet |
Beck, Kristen Fletcher, Michael-Shawn Gadd, Patricia S. Heijnis, Henk Jacobsen, Geraldine E. |
author_sort |
Beck, Kristen |
title |
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
title_short |
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
title_full |
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
title_fullStr |
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
title_full_unstemmed |
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania |
title_sort |
early onset of enso influence in the extra-tropics of the southwest pacific inferred from a 14, 600 year high resolution multi-proxy record from paddy's lake, northwest tasmania |
publishDate |
2017 |
url |
https://eprints.lincoln.ac.uk/id/eprint/32128/ https://eprints.lincoln.ac.uk/id/eprint/32128/1/Beck%20et%20al%20Paddy%27s%20Lake%20pollen_REVISED_manuscript_FINAL.pdf https://eprints.lincoln.ac.uk/id/eprint/32128/3/K%20Beck%20-%20An%20early%20onset%20of%20ENSO.docx https://doi.org/10.1016/j.quascirev.2016.12.001 |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://eprints.lincoln.ac.uk/id/eprint/32128/1/Beck%20et%20al%20Paddy%27s%20Lake%20pollen_REVISED_manuscript_FINAL.pdf https://eprints.lincoln.ac.uk/id/eprint/32128/3/K%20Beck%20-%20An%20early%20onset%20of%20ENSO.docx Beck, Kristen, Fletcher, Michael-Shawn, Gadd, Patricia S., Heijnis, Henk and Jacobsen, Geraldine E. (2017) An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania. Quaternary Science Reviews, 157 . pp. 164-175. ISSN 0277-3791 doi:10.1016/j.quascirev.2016.12.001 |
op_rights |
cc_by_nc_nd4 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.quascirev.2016.12.001 |
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Quaternary Science Reviews |
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157 |
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164 |
op_container_end_page |
175 |
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1766138750882021376 |