Temperature reconstruction of sediment cores from the northeastern Arabian Sea
In order to reconstruct the monsoonal variability during the late Holocene we investigated a complete, annually laminated sediment record from the oxygen minimum zone (OMZ) off Pakistan for oxygen isotopes of planktic foraminifera and alkenone-derived sea surface temperatures (SST). Significant SST...
Main Authors: | , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2001
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.735717 https://doi.org/10.1594/PANGAEA.735717 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735717 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735717 2023-05-15T16:30:28+02:00 Temperature reconstruction of sediment cores from the northeastern Arabian Sea Doose-Rolinski, Heidi Rogalla, U Scheeder, Georg Lückge, Andreas von Rad, Ulrich MEDIAN LATITUDE: 24.833000 * MEDIAN LONGITUDE: 65.924500 * SOUTH-BOUND LATITUDE: 24.833000 * WEST-BOUND LONGITUDE: 65.916000 * NORTH-BOUND LATITUDE: 24.833000 * EAST-BOUND LONGITUDE: 65.933000 * DATE/TIME START: 1993-09-08T00:00:00 * DATE/TIME END: 1993-09-10T00:00:00 2001-03-25 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.735717 https://doi.org/10.1594/PANGAEA.735717 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735717 https://doi.org/10.1594/PANGAEA.735717 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Doose-Rolinski, Heidi; Rogalla, U; Scheeder, Georg; Lückge, Andreas; von Rad, Ulrich (2001): High resolution temperature and evaporation changes during the late Holocene in the northeastern Arabian Sea. Paleoceanography, 16(4), 358-367, https://doi.org/10.1029/2000PA000511 Arabian Sea BCR Box corer (Reineck) KAL Kasten corer PAKOMIN SO90 SO90_39KG SO90_56KA Sonne Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.735717 https://doi.org/10.1029/2000PA000511 2023-01-20T07:31:42Z In order to reconstruct the monsoonal variability during the late Holocene we investigated a complete, annually laminated sediment record from the oxygen minimum zone (OMZ) off Pakistan for oxygen isotopes of planktic foraminifera and alkenone-derived sea surface temperatures (SST). Significant SST changes of up to 3°C which cannot be explained by changes in the alkenone-producing coccolithophorid species (inferred from the Gephyrocapsa oceanica / Emiliania huxleyi ratio) suggest that SST changes are driven by changes in the monsoon strength. Our high-(decadal)-resolution data indicate that the late Holocene in the northeastern Arabian Sea was not characterized by a stable uniform climate, as inferred from the Greenland ice cores, but by variations in the dominance of the SW monsoon conditions with significant effects on temperatures. Highest SST fluctuations of up to 3.0°C and 2.5°C were observed for the time interval from 4600 to 3300 years B.P. and during the past 500 years. The significant, short-term SST changes during the past 500 years might be related to climatic instabilities known from the northern latitudes ("Little Ice Age") and confirm global effects. Surface salinity values, reconstructed from delta18O records after correction for temperature-related oxygen isotope fractionation, suggest that in general, the past 5000 years were characterized by higher-than-recent evaporation and more intense SW monsoon conditions. However, between 4600 and 3700 years B.P., evaporation dropped, SW monsoon weakened, and NE monsoon conditions were comparatively enhanced. For the past 1500 years we infer strongly fluctuating monsoon conditions. Comparisons of reconstructed salinity records with ice accumulation data from published Tibetan ice core and Tibetan tree ring width data reveal that during the past 2000 years, enhanced evaporation in the northeastern Arabian Sea correlates with periods of increased ice accumulation in Tibet, and vice versa. This suggests a strong climatic relationship between both ... Dataset Greenland Greenland ice cores ice core PANGAEA - Data Publisher for Earth & Environmental Science Greenland ENVELOPE(65.916000,65.933000,24.833000,24.833000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Arabian Sea BCR Box corer (Reineck) KAL Kasten corer PAKOMIN SO90 SO90_39KG SO90_56KA Sonne |
spellingShingle |
Arabian Sea BCR Box corer (Reineck) KAL Kasten corer PAKOMIN SO90 SO90_39KG SO90_56KA Sonne Doose-Rolinski, Heidi Rogalla, U Scheeder, Georg Lückge, Andreas von Rad, Ulrich Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
topic_facet |
Arabian Sea BCR Box corer (Reineck) KAL Kasten corer PAKOMIN SO90 SO90_39KG SO90_56KA Sonne |
description |
In order to reconstruct the monsoonal variability during the late Holocene we investigated a complete, annually laminated sediment record from the oxygen minimum zone (OMZ) off Pakistan for oxygen isotopes of planktic foraminifera and alkenone-derived sea surface temperatures (SST). Significant SST changes of up to 3°C which cannot be explained by changes in the alkenone-producing coccolithophorid species (inferred from the Gephyrocapsa oceanica / Emiliania huxleyi ratio) suggest that SST changes are driven by changes in the monsoon strength. Our high-(decadal)-resolution data indicate that the late Holocene in the northeastern Arabian Sea was not characterized by a stable uniform climate, as inferred from the Greenland ice cores, but by variations in the dominance of the SW monsoon conditions with significant effects on temperatures. Highest SST fluctuations of up to 3.0°C and 2.5°C were observed for the time interval from 4600 to 3300 years B.P. and during the past 500 years. The significant, short-term SST changes during the past 500 years might be related to climatic instabilities known from the northern latitudes ("Little Ice Age") and confirm global effects. Surface salinity values, reconstructed from delta18O records after correction for temperature-related oxygen isotope fractionation, suggest that in general, the past 5000 years were characterized by higher-than-recent evaporation and more intense SW monsoon conditions. However, between 4600 and 3700 years B.P., evaporation dropped, SW monsoon weakened, and NE monsoon conditions were comparatively enhanced. For the past 1500 years we infer strongly fluctuating monsoon conditions. Comparisons of reconstructed salinity records with ice accumulation data from published Tibetan ice core and Tibetan tree ring width data reveal that during the past 2000 years, enhanced evaporation in the northeastern Arabian Sea correlates with periods of increased ice accumulation in Tibet, and vice versa. This suggests a strong climatic relationship between both ... |
format |
Dataset |
author |
Doose-Rolinski, Heidi Rogalla, U Scheeder, Georg Lückge, Andreas von Rad, Ulrich |
author_facet |
Doose-Rolinski, Heidi Rogalla, U Scheeder, Georg Lückge, Andreas von Rad, Ulrich |
author_sort |
Doose-Rolinski, Heidi |
title |
Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
title_short |
Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
title_full |
Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
title_fullStr |
Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
title_full_unstemmed |
Temperature reconstruction of sediment cores from the northeastern Arabian Sea |
title_sort |
temperature reconstruction of sediment cores from the northeastern arabian sea |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735717 https://doi.org/10.1594/PANGAEA.735717 |
op_coverage |
MEDIAN LATITUDE: 24.833000 * MEDIAN LONGITUDE: 65.924500 * SOUTH-BOUND LATITUDE: 24.833000 * WEST-BOUND LONGITUDE: 65.916000 * NORTH-BOUND LATITUDE: 24.833000 * EAST-BOUND LONGITUDE: 65.933000 * DATE/TIME START: 1993-09-08T00:00:00 * DATE/TIME END: 1993-09-10T00:00:00 |
long_lat |
ENVELOPE(65.916000,65.933000,24.833000,24.833000) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores ice core |
genre_facet |
Greenland Greenland ice cores ice core |
op_source |
Supplement to: Doose-Rolinski, Heidi; Rogalla, U; Scheeder, Georg; Lückge, Andreas; von Rad, Ulrich (2001): High resolution temperature and evaporation changes during the late Holocene in the northeastern Arabian Sea. Paleoceanography, 16(4), 358-367, https://doi.org/10.1029/2000PA000511 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735717 https://doi.org/10.1594/PANGAEA.735717 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.735717 https://doi.org/10.1029/2000PA000511 |
_version_ |
1766020190381801472 |