Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1
We present a continuous and well-resolved record of climatic variability for the past 100,000 yrs from a marine sediment core taken in Delagoa Bight, off southeastern Africa. In addition to providing a sea surface temperature reconstruction for the past ca. 100,000 yrs, this record also allows a hig...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.910537 2024-06-23T07:47:55+00:00 Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 Hahn, Annette Schefuß, Enno Groeneveld, Jeroen Miller, Charlotte Zabel, Matthias LATITUDE: -25.589000 * LONGITUDE: 33.334000 * DATE/TIME START: 2016-02-15T13:00:00 * DATE/TIME END: 2016-02-15T13:00:00 2020 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.910537 https://doi.org/10.1594/PANGAEA.910537 en eng PANGAEA Hahn, Annette; Schefuß, Enno; Groeneveld, Jeroen; Miller, Charlotte; Zabel, Matthias (2021): Glacial to interglacial climate variability in the southeastern African subtropics (25–20° S). Climate of the Past, 17(1), 345-360, https://doi.org/10.5194/cp-17-345-2021 https://doi.pangaea.de/10.1594/PANGAEA.910537 https://doi.org/10.1594/PANGAEA.910537 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess TRACES Tracing Human and Climate impacts in South Africa Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.91053710.5194/cp-17-345-2021 2024-06-12T14:17:12Z We present a continuous and well-resolved record of climatic variability for the past 100,000 yrs from a marine sediment core taken in Delagoa Bight, off southeastern Africa. In addition to providing a sea surface temperature reconstruction for the past ca. 100,000 yrs, this record also allows a high-resolution continental climatic reconstruction. Climate sensitive organic proxies, like the distribution and isotopic composition of plant-wax lipids as well as elemental indicators for fluvial input and weathering type provide information on climatic changes in the adjacent catchment areas (Incomati, Matola, and Lusutfu rivers). At the transition between glacials and interglacials, shifts in vegetation correlate with changes in sea surface temperature in the Agulhas current. The local hydrology, however, does not follow these orbital-paced shifts. Instead, precipitation patterns follow millennial scale variations with different forcing mechanisms in glacial versus interglacial climatic states. During glacials, southward displacement of the Intertropical Convergence Zone facilitates a transmission of northern hemispheric signals (e.g. Heinrich events) to the southern hemispheric subtropics. Furthermore, the southern hemispheric westerlies become a more direct source of precipitation as they shift northward over the study site, especially during Antarctic cold phases. During interglacials, the observed short-term hydrological variability is also a function of Antarctic climate variability, however, it is driven by the indirect influence of the southern hemispheric westerlies and the associated South African high-pressure cell blocking the South Indian Ocean Convergence Zone related precipitation. As a consequence of the interplay of these effects, small scale climatic zones exist. We propose a conceptual model describing latitudinal shifts of these zones along the southeastern African coast as tropical and temperate climate systems shift over glacial and interglacial cycles. The proposed model explains some of the ... Dataset Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian ENVELOPE(33.334000,33.334000,-25.589000,-25.589000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
TRACES Tracing Human and Climate impacts in South Africa |
spellingShingle |
TRACES Tracing Human and Climate impacts in South Africa Hahn, Annette Schefuß, Enno Groeneveld, Jeroen Miller, Charlotte Zabel, Matthias Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
topic_facet |
TRACES Tracing Human and Climate impacts in South Africa |
description |
We present a continuous and well-resolved record of climatic variability for the past 100,000 yrs from a marine sediment core taken in Delagoa Bight, off southeastern Africa. In addition to providing a sea surface temperature reconstruction for the past ca. 100,000 yrs, this record also allows a high-resolution continental climatic reconstruction. Climate sensitive organic proxies, like the distribution and isotopic composition of plant-wax lipids as well as elemental indicators for fluvial input and weathering type provide information on climatic changes in the adjacent catchment areas (Incomati, Matola, and Lusutfu rivers). At the transition between glacials and interglacials, shifts in vegetation correlate with changes in sea surface temperature in the Agulhas current. The local hydrology, however, does not follow these orbital-paced shifts. Instead, precipitation patterns follow millennial scale variations with different forcing mechanisms in glacial versus interglacial climatic states. During glacials, southward displacement of the Intertropical Convergence Zone facilitates a transmission of northern hemispheric signals (e.g. Heinrich events) to the southern hemispheric subtropics. Furthermore, the southern hemispheric westerlies become a more direct source of precipitation as they shift northward over the study site, especially during Antarctic cold phases. During interglacials, the observed short-term hydrological variability is also a function of Antarctic climate variability, however, it is driven by the indirect influence of the southern hemispheric westerlies and the associated South African high-pressure cell blocking the South Indian Ocean Convergence Zone related precipitation. As a consequence of the interplay of these effects, small scale climatic zones exist. We propose a conceptual model describing latitudinal shifts of these zones along the southeastern African coast as tropical and temperate climate systems shift over glacial and interglacial cycles. The proposed model explains some of the ... |
format |
Dataset |
author |
Hahn, Annette Schefuß, Enno Groeneveld, Jeroen Miller, Charlotte Zabel, Matthias |
author_facet |
Hahn, Annette Schefuß, Enno Groeneveld, Jeroen Miller, Charlotte Zabel, Matthias |
author_sort |
Hahn, Annette |
title |
Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
title_short |
Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
title_full |
Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
title_fullStr |
Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
title_full_unstemmed |
Age, biomarker, sea surface temperature, and stable isotopic records of sediment core GeoB20616-1 |
title_sort |
age, biomarker, sea surface temperature, and stable isotopic records of sediment core geob20616-1 |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.910537 https://doi.org/10.1594/PANGAEA.910537 |
op_coverage |
LATITUDE: -25.589000 * LONGITUDE: 33.334000 * DATE/TIME START: 2016-02-15T13:00:00 * DATE/TIME END: 2016-02-15T13:00:00 |
long_lat |
ENVELOPE(33.334000,33.334000,-25.589000,-25.589000) |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Hahn, Annette; Schefuß, Enno; Groeneveld, Jeroen; Miller, Charlotte; Zabel, Matthias (2021): Glacial to interglacial climate variability in the southeastern African subtropics (25–20° S). Climate of the Past, 17(1), 345-360, https://doi.org/10.5194/cp-17-345-2021 https://doi.pangaea.de/10.1594/PANGAEA.910537 https://doi.org/10.1594/PANGAEA.910537 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.91053710.5194/cp-17-345-2021 |
_version_ |
1802638176819347456 |