Ice-rafted debris in ODP Holes 177-1090D and 188-1165B
Constraining the nature of Antarctic Ice Sheet (AIS) response to major past climate changes may provide a window onto future ice response and rates of sea level rise. One approach to tracking AIS dynamics, and differentiating whole system versus potentially heterogeneous ice sheet sector changes, is...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.840675 2024-09-15T17:41:49+00:00 Ice-rafted debris in ODP Holes 177-1090D and 188-1165B Teitler, Lora Florindo, Fabio Warnke, Detlef A Filippelli, Gabriel M Kupp, Gary Taylor, Brian MEDIAN LATITUDE: -53.646625 * MEDIAN LONGITUDE: 38.059525 * SOUTH-BOUND LATITUDE: -64.379650 * WEST-BOUND LONGITUDE: 8.900000 * NORTH-BOUND LATITUDE: -42.913600 * EAST-BOUND LONGITUDE: 67.219050 * DATE/TIME START: 1997-12-28T23:25:00 * DATE/TIME END: 2000-02-04T05:30:00 2014 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.840675 https://doi.org/10.1594/PANGAEA.840675 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.840675 https://doi.org/10.1594/PANGAEA.840675 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Teitler, Lora; Florindo, Fabio; Warnke, Detlef A; Filippelli, Gabriel M; Kupp, Gary; Taylor, Brian (2015): Antarctic Ice Sheet response to a long warm interval across Marine Isotope Stage 31: A cross-latitudinal study of iceberg-rafted debris. Earth and Planetary Science Letters, 409, 109-119, https://doi.org/10.1016/j.epsl.2014.10.037 Ocean Drilling Program ODP dataset publication series 2014 ftpangaea https://doi.org/10.1594/PANGAEA.84067510.1016/j.epsl.2014.10.037 2024-07-24T02:31:21Z Constraining the nature of Antarctic Ice Sheet (AIS) response to major past climate changes may provide a window onto future ice response and rates of sea level rise. One approach to tracking AIS dynamics, and differentiating whole system versus potentially heterogeneous ice sheet sector changes, is to integrate multiple climate proxies for a specific time slice across widely distributed locations. This study presents new iceberg-rafted debris (IRD) data across the interval that includes Marine Isotope Stage 31 (MIS 31: 1.081-1.062 Ma, a span of ~19 kyr; Lisiecki and Raymo, 2005), which lies on the cusp of the mid-Brunhes climate transition (as glacial cycles shifted from ~41,000 yr to ~100,000 yr duration). Two sites are studied - distal Ocean Drilling Program (ODP) Leg 177 Site 1090 (Site 1090) in the eastern subantarctic sector of the South Atlantic Ocean, and proximal ODP Leg 188 Site 1165 (Site 1165), near Prydz Bay, in the Indian Ocean sector of the Antarctic margin. At each of these sites, MIS 31 is marked by the presence of the Jaramillo Subchron (0.988-1.072 Ma; Lourens et al., 2004) which provides a time-marker to correlate these two sites with relative precision. At both sites, records of multiple climate proxies are available to aid in interpretation. The presence of IRD in sediments from our study areas, which include garnets indicating a likely East Antarctic Ice Sheet (EAIS) origin, supports the conclusion that although the EAIS apparently withdrew significantly over MIS 31 in the Prydz Bay region and other sectors, some sectors of the EAIS must still have maintained marine margins capable of launching icebergs even through the warmest intervals. Thus, the EAIS did not respond in complete synchrony even to major climate changes such as MIS 31. Further, the record at Site 1090 (supported by records from other subantarctic locations) indicates that the glacial MIS 32 should be reduced to no more than a stadial, and the warm interval of Antarctic ice retreat that includes MIS 31 should be expanded to ... Other/Unknown Material Antarc* Antarctic Ice Sheet Iceberg* Prydz Bay South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(8.900000,67.219050,-42.913600,-64.379650) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Teitler, Lora Florindo, Fabio Warnke, Detlef A Filippelli, Gabriel M Kupp, Gary Taylor, Brian Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
topic_facet |
Ocean Drilling Program ODP |
description |
Constraining the nature of Antarctic Ice Sheet (AIS) response to major past climate changes may provide a window onto future ice response and rates of sea level rise. One approach to tracking AIS dynamics, and differentiating whole system versus potentially heterogeneous ice sheet sector changes, is to integrate multiple climate proxies for a specific time slice across widely distributed locations. This study presents new iceberg-rafted debris (IRD) data across the interval that includes Marine Isotope Stage 31 (MIS 31: 1.081-1.062 Ma, a span of ~19 kyr; Lisiecki and Raymo, 2005), which lies on the cusp of the mid-Brunhes climate transition (as glacial cycles shifted from ~41,000 yr to ~100,000 yr duration). Two sites are studied - distal Ocean Drilling Program (ODP) Leg 177 Site 1090 (Site 1090) in the eastern subantarctic sector of the South Atlantic Ocean, and proximal ODP Leg 188 Site 1165 (Site 1165), near Prydz Bay, in the Indian Ocean sector of the Antarctic margin. At each of these sites, MIS 31 is marked by the presence of the Jaramillo Subchron (0.988-1.072 Ma; Lourens et al., 2004) which provides a time-marker to correlate these two sites with relative precision. At both sites, records of multiple climate proxies are available to aid in interpretation. The presence of IRD in sediments from our study areas, which include garnets indicating a likely East Antarctic Ice Sheet (EAIS) origin, supports the conclusion that although the EAIS apparently withdrew significantly over MIS 31 in the Prydz Bay region and other sectors, some sectors of the EAIS must still have maintained marine margins capable of launching icebergs even through the warmest intervals. Thus, the EAIS did not respond in complete synchrony even to major climate changes such as MIS 31. Further, the record at Site 1090 (supported by records from other subantarctic locations) indicates that the glacial MIS 32 should be reduced to no more than a stadial, and the warm interval of Antarctic ice retreat that includes MIS 31 should be expanded to ... |
format |
Other/Unknown Material |
author |
Teitler, Lora Florindo, Fabio Warnke, Detlef A Filippelli, Gabriel M Kupp, Gary Taylor, Brian |
author_facet |
Teitler, Lora Florindo, Fabio Warnke, Detlef A Filippelli, Gabriel M Kupp, Gary Taylor, Brian |
author_sort |
Teitler, Lora |
title |
Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
title_short |
Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
title_full |
Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
title_fullStr |
Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
title_full_unstemmed |
Ice-rafted debris in ODP Holes 177-1090D and 188-1165B |
title_sort |
ice-rafted debris in odp holes 177-1090d and 188-1165b |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.840675 https://doi.org/10.1594/PANGAEA.840675 |
op_coverage |
MEDIAN LATITUDE: -53.646625 * MEDIAN LONGITUDE: 38.059525 * SOUTH-BOUND LATITUDE: -64.379650 * WEST-BOUND LONGITUDE: 8.900000 * NORTH-BOUND LATITUDE: -42.913600 * EAST-BOUND LONGITUDE: 67.219050 * DATE/TIME START: 1997-12-28T23:25:00 * DATE/TIME END: 2000-02-04T05:30:00 |
long_lat |
ENVELOPE(8.900000,67.219050,-42.913600,-64.379650) |
genre |
Antarc* Antarctic Ice Sheet Iceberg* Prydz Bay South Atlantic Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Iceberg* Prydz Bay South Atlantic Ocean |
op_source |
Supplement to: Teitler, Lora; Florindo, Fabio; Warnke, Detlef A; Filippelli, Gabriel M; Kupp, Gary; Taylor, Brian (2015): Antarctic Ice Sheet response to a long warm interval across Marine Isotope Stage 31: A cross-latitudinal study of iceberg-rafted debris. Earth and Planetary Science Letters, 409, 109-119, https://doi.org/10.1016/j.epsl.2014.10.037 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.840675 https://doi.org/10.1594/PANGAEA.840675 |
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.84067510.1016/j.epsl.2014.10.037 |
_version_ |
1810488079067119616 |