A Holocene peat record in the central South Atlantic: an archive of precipitation changes
Lindvall, Hanna ; Björck, Svante LU ; Holmgren, Sofia LU ; Ljung, Karl LU
; Van der Putten, Nathalie
LU
and Porter, Charles
(2011)
In GFF
133(3-4).
p.195-206
- Abstract
- Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analysed - total carbon and nitrogen, biogenic silica, diatoms, amount of organic matter, macrofossils and magnetic susceptibility - and together with the lithology they are interpreted as a record reflecting changes in humidity/precipitation. Early Holocene (10,000-8500 cal. BP) was possibly significantly drier than today, probably caused by a southerly displacement of the Southern Hemisphere Westerlies (SHW) during the Antarctic climate optimum.... (More)
- Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analysed - total carbon and nitrogen, biogenic silica, diatoms, amount of organic matter, macrofossils and magnetic susceptibility - and together with the lithology they are interpreted as a record reflecting changes in humidity/precipitation. Early Holocene (10,000-8500 cal. BP) was possibly significantly drier than today, probably caused by a southerly displacement of the Southern Hemisphere Westerlies (SHW) during the Antarctic climate optimum. From 8500 cal. BP and onwards, the climate became generally more humid and surface run-off increased due to higher precipitation, possibly as an effect of increased influence from the SHW as it moved north. During this generally humid period, our data disclose a distinct pattern of recurrent centennial- to millennial-long events of increased precipitation and the results corroborate the only other study in the region with a similar humidity record. The events might represent large-scale climate oscillations in the Southern Hemisphere, such as latitudinal shifts of the SHW, but may also be related to changes in sea surface temperatures. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2494289
- author
- Lindvall, Hanna
; Björck, Svante
LU
; Holmgren, Sofia
LU
; Ljung, Karl
LU
; Van der Putten, Nathalie
LU
and Porter, Charles
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- South Atlantic Ocean, Nightingale Island, Holocene, peat
- in
- GFF
- volume
- 133
- issue
- 3-4
- pages
- 195 - 206
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000299035100007
- scopus:84859051104
- ISSN
- 2000-0863
- DOI
- 10.1080/11035897.2011.633708
- language
- English
- LU publication?
- yes
- id
- cf739592-80e1-461f-99b5-67fede2e6881 (old id 2494289)
- date added to LUP
- 2016-04-01 10:48:04
- date last changed
- 2023-01-02 07:58:04
@article{cf739592-80e1-461f-99b5-67fede2e6881,
abstract = {{Peat deposits from the littoral part of the wetland 2nd Pond on Nightingale Island in the central South Atlantic have been analysed to investigate the Holocene climate development on the island and to test a hypothesis about regionally persistent humidity variations. A variety of proxies were analysed - total carbon and nitrogen, biogenic silica, diatoms, amount of organic matter, macrofossils and magnetic susceptibility - and together with the lithology they are interpreted as a record reflecting changes in humidity/precipitation. Early Holocene (10,000-8500 cal. BP) was possibly significantly drier than today, probably caused by a southerly displacement of the Southern Hemisphere Westerlies (SHW) during the Antarctic climate optimum. From 8500 cal. BP and onwards, the climate became generally more humid and surface run-off increased due to higher precipitation, possibly as an effect of increased influence from the SHW as it moved north. During this generally humid period, our data disclose a distinct pattern of recurrent centennial- to millennial-long events of increased precipitation and the results corroborate the only other study in the region with a similar humidity record. The events might represent large-scale climate oscillations in the Southern Hemisphere, such as latitudinal shifts of the SHW, but may also be related to changes in sea surface temperatures.}},
author = {{Lindvall, Hanna and Björck, Svante and Holmgren, Sofia and Ljung, Karl and Van der Putten, Nathalie and Porter, Charles}},
issn = {{2000-0863}},
keywords = {{South Atlantic Ocean; Nightingale Island; Holocene; peat}},
language = {{eng}},
number = {{3-4}},
pages = {{195--206}},
publisher = {{Taylor & Francis}},
series = {{GFF}},
title = {{A Holocene peat record in the central South Atlantic: an archive of precipitation changes}},
url = {{http://dx.doi.org/10.1080/11035897.2011.633708}},
doi = {{10.1080/11035897.2011.633708}},
volume = {{133}},
year = {{2011}},
}