Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123
Planktonic foraminiferal assemblages and artificial neural network estimates of sea-surface temperature (SST) at ODP Site 1123 (41°47.2'S, 171°29.9'W; 3290 m deep), east of New Zealand, reveal a high-resolution history of glacial-interglacial (G-I) variability at the Subtropical Front (STF...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.706110 2024-09-15T17:48:03+00:00 Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 Crundwell, Martin P Scott, George H Naish, Tim R Carter, Lionel LATITUDE: -41.786000 * LONGITUDE: -171.499000 * DATE/TIME START: 1998-09-12T00:00:00 * DATE/TIME END: 1998-09-24T00:00:00 2008 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.706110 https://doi.org/10.1594/PANGAEA.706110 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.706110 https://doi.org/10.1594/PANGAEA.706110 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Crundwell, Martin P; Scott, George H; Naish, Tim R; Carter, Lionel (2008): Glacial-interglacial ocean climate variability from planktonic foraminifera during the Mid-Pleistocene transition in the temperate Southwest Pacific, ODP Site 1123. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 202-229, https://doi.org/10.1016/j.palaeo.2007.08.023 181-1123 COMPCORE Composite Core Joides Resolution Leg181 Ocean Drilling Program ODP South Pacific Ocean dataset publication series 2008 ftpangaea https://doi.org/10.1594/PANGAEA.70611010.1016/j.palaeo.2007.08.023 2024-07-24T02:31:42Z Planktonic foraminiferal assemblages and artificial neural network estimates of sea-surface temperature (SST) at ODP Site 1123 (41°47.2'S, 171°29.9'W; 3290 m deep), east of New Zealand, reveal a high-resolution history of glacial-interglacial (G-I) variability at the Subtropical Front (STF) for the last 1.2 million years, including the Mid-Pleistocene climate transition (MPT). Most G-I cycles of ~100 kyr duration have short periods of cold glacial and warm deglacial climate centred on glacial terminations, followed by long temperate interglacial periods. During glacial-deglacial transitions, maximum abundances of subantarctic and subtropical taxa coincide with SST minima and maxima, and lead ice volume by up to 8 kyrs. Such relationships reflect the competing influence of subantarctic and subtropical surface inflows during glacial and deglacial periods, respectively, suggesting alternate polar and tropical forcing of southern mid-latitude ocean climate. The lead of SSTs and subtropical inflow over ice volume points to tropical forcing of southern mid-latitude ocean-climate during deglacial warming. This contrasts with the established hypothesis that southern hemisphere ocean climate is driven by the influence of continental glaciations. Based on wholesale changes in subantarctic and subtropical faunas, the last 1.2 million years are subdivided into 4-distinct periods of ocean climate. 1) The pre-MPT (1185-870 ka) has high amplitude 41-kyr fluctuations in SST, superimposed on a general cooling trend and heightened productivity, reflecting long-term strengthening of subantarctic inflow under an invigorated Antarctic Circumpolar Current. 2) The early MPT (870-620 ka) is marked by abrupt warming during MIS 21, followed by a period of unstable periodicities within the 40-100 kyr orbital bands, decreasing SST amplitudes, and long intervals of temperate interglacial climate punctuated by short glacial and deglacial phases, reflecting lower meridional temperature gradients. 3) The late MPT (620-435 ka) encompasses an ... Other/Unknown Material Antarc* Antarctic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-171.499000,-171.499000,-41.786000,-41.786000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
181-1123 COMPCORE Composite Core Joides Resolution Leg181 Ocean Drilling Program ODP South Pacific Ocean |
spellingShingle |
181-1123 COMPCORE Composite Core Joides Resolution Leg181 Ocean Drilling Program ODP South Pacific Ocean Crundwell, Martin P Scott, George H Naish, Tim R Carter, Lionel Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
topic_facet |
181-1123 COMPCORE Composite Core Joides Resolution Leg181 Ocean Drilling Program ODP South Pacific Ocean |
description |
Planktonic foraminiferal assemblages and artificial neural network estimates of sea-surface temperature (SST) at ODP Site 1123 (41°47.2'S, 171°29.9'W; 3290 m deep), east of New Zealand, reveal a high-resolution history of glacial-interglacial (G-I) variability at the Subtropical Front (STF) for the last 1.2 million years, including the Mid-Pleistocene climate transition (MPT). Most G-I cycles of ~100 kyr duration have short periods of cold glacial and warm deglacial climate centred on glacial terminations, followed by long temperate interglacial periods. During glacial-deglacial transitions, maximum abundances of subantarctic and subtropical taxa coincide with SST minima and maxima, and lead ice volume by up to 8 kyrs. Such relationships reflect the competing influence of subantarctic and subtropical surface inflows during glacial and deglacial periods, respectively, suggesting alternate polar and tropical forcing of southern mid-latitude ocean climate. The lead of SSTs and subtropical inflow over ice volume points to tropical forcing of southern mid-latitude ocean-climate during deglacial warming. This contrasts with the established hypothesis that southern hemisphere ocean climate is driven by the influence of continental glaciations. Based on wholesale changes in subantarctic and subtropical faunas, the last 1.2 million years are subdivided into 4-distinct periods of ocean climate. 1) The pre-MPT (1185-870 ka) has high amplitude 41-kyr fluctuations in SST, superimposed on a general cooling trend and heightened productivity, reflecting long-term strengthening of subantarctic inflow under an invigorated Antarctic Circumpolar Current. 2) The early MPT (870-620 ka) is marked by abrupt warming during MIS 21, followed by a period of unstable periodicities within the 40-100 kyr orbital bands, decreasing SST amplitudes, and long intervals of temperate interglacial climate punctuated by short glacial and deglacial phases, reflecting lower meridional temperature gradients. 3) The late MPT (620-435 ka) encompasses an ... |
format |
Other/Unknown Material |
author |
Crundwell, Martin P Scott, George H Naish, Tim R Carter, Lionel |
author_facet |
Crundwell, Martin P Scott, George H Naish, Tim R Carter, Lionel |
author_sort |
Crundwell, Martin P |
title |
Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
title_short |
Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
title_full |
Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
title_fullStr |
Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
title_full_unstemmed |
Distribution of planktonic foraminifera during the Mid-Pleistocene of ODP Site 181-1123 |
title_sort |
distribution of planktonic foraminifera during the mid-pleistocene of odp site 181-1123 |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.706110 https://doi.org/10.1594/PANGAEA.706110 |
op_coverage |
LATITUDE: -41.786000 * LONGITUDE: -171.499000 * DATE/TIME START: 1998-09-12T00:00:00 * DATE/TIME END: 1998-09-24T00:00:00 |
long_lat |
ENVELOPE(-171.499000,-171.499000,-41.786000,-41.786000) |
genre |
Antarc* Antarctic Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Planktonic foraminifera |
op_source |
Supplement to: Crundwell, Martin P; Scott, George H; Naish, Tim R; Carter, Lionel (2008): Glacial-interglacial ocean climate variability from planktonic foraminifera during the Mid-Pleistocene transition in the temperate Southwest Pacific, ODP Site 1123. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 202-229, https://doi.org/10.1016/j.palaeo.2007.08.023 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.706110 https://doi.org/10.1594/PANGAEA.706110 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.70611010.1016/j.palaeo.2007.08.023 |
_version_ |
1810288801247920128 |