(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ...
The Japan Sea experienced bottom water anoxia at the last glacial maximum (LGM) since it is surrounded by four shallow straits, the sill depths of which are close to, or shallower than, the drop in sea level (~120 m) that occurred then. A distinctive negative d18O excursion of planktonic foraminifer...
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ftdatacite:10.1594/pangaea.802169 2024-09-15T18:19:31+00:00 (Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... Ishiwatari, Ryoshi Houtatsu, M Okada, H 2001 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.802169 https://doi.pangaea.de/10.1594/PANGAEA.802169 en eng PANGAEA https://dx.doi.org/10.1016/s0146-6380(00)00151-0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 DEPTH, sediment/rock Calendar age Cassidulina japonica, δ18O δ18O Neogloboquadrina pachyderma dextral and/or sinistral, δ18O Sea surface temperature Age model Gravity corer Calculated Calculated from UK37 Prahl et al., 1988 dataset Dataset 2001 ftdatacite https://doi.org/10.1594/pangaea.80216910.1016/s0146-6380(00)00151-0 2024-08-01T10:57:41Z The Japan Sea experienced bottom water anoxia at the last glacial maximum (LGM) since it is surrounded by four shallow straits, the sill depths of which are close to, or shallower than, the drop in sea level (~120 m) that occurred then. A distinctive negative d18O excursion of planktonic foraminifera also took place during the LGM. This excursion has been interpreted from foraminiferal data as recording a drop in the paleosalinity of surface waters on the assumption of a constant low sea surface temperatures between 34 and 11 ka. We present here a profile of alkenone-based sea surface temperatures (alkenone-SSTs) over the past 36 kyr. Our results suggest that SSTs during the LGM were much higher than those previously assumed. After considering the factors that might affect estimation of alkenone-SSTs and comparisons of core-top alkenone-SSTs values with values for modern seawater we conclude that the higher alkenone-SSTs during the LGM are reliable and reasonable. These warm SSTs were probably caused by ... : (a) Data from Oba et al. (1995)(b) delta(dw) was calculated from T(°C) = 16.9-6.17 (delta(df)-delta(dw)) + 0.52 (delta(df)-delta(dw))**2 (Oba et al., 1980) on the assumption that bottom water temperature is 0.2°C.(c) delta(sw) was assumed to be isotopically heavier by 0.2 per mil than that of bottom water (Oba et al., 1980).(d) SST was calculated from SST (°C) = 21.4-4.19 (delta(sf)-delta(sw)) + 0.05 (delta(sf)-delta(sw))**2 (Oba et al., 1980). ... Dataset Neogloboquadrina pachyderma Planktonic foraminifera DataCite |
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DataCite |
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ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock Calendar age Cassidulina japonica, δ18O δ18O Neogloboquadrina pachyderma dextral and/or sinistral, δ18O Sea surface temperature Age model Gravity corer Calculated Calculated from UK37 Prahl et al., 1988 |
spellingShingle |
DEPTH, sediment/rock Calendar age Cassidulina japonica, δ18O δ18O Neogloboquadrina pachyderma dextral and/or sinistral, δ18O Sea surface temperature Age model Gravity corer Calculated Calculated from UK37 Prahl et al., 1988 Ishiwatari, Ryoshi Houtatsu, M Okada, H (Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
topic_facet |
DEPTH, sediment/rock Calendar age Cassidulina japonica, δ18O δ18O Neogloboquadrina pachyderma dextral and/or sinistral, δ18O Sea surface temperature Age model Gravity corer Calculated Calculated from UK37 Prahl et al., 1988 |
description |
The Japan Sea experienced bottom water anoxia at the last glacial maximum (LGM) since it is surrounded by four shallow straits, the sill depths of which are close to, or shallower than, the drop in sea level (~120 m) that occurred then. A distinctive negative d18O excursion of planktonic foraminifera also took place during the LGM. This excursion has been interpreted from foraminiferal data as recording a drop in the paleosalinity of surface waters on the assumption of a constant low sea surface temperatures between 34 and 11 ka. We present here a profile of alkenone-based sea surface temperatures (alkenone-SSTs) over the past 36 kyr. Our results suggest that SSTs during the LGM were much higher than those previously assumed. After considering the factors that might affect estimation of alkenone-SSTs and comparisons of core-top alkenone-SSTs values with values for modern seawater we conclude that the higher alkenone-SSTs during the LGM are reliable and reasonable. These warm SSTs were probably caused by ... : (a) Data from Oba et al. (1995)(b) delta(dw) was calculated from T(°C) = 16.9-6.17 (delta(df)-delta(dw)) + 0.52 (delta(df)-delta(dw))**2 (Oba et al., 1980) on the assumption that bottom water temperature is 0.2°C.(c) delta(sw) was assumed to be isotopically heavier by 0.2 per mil than that of bottom water (Oba et al., 1980).(d) SST was calculated from SST (°C) = 21.4-4.19 (delta(sf)-delta(sw)) + 0.05 (delta(sf)-delta(sw))**2 (Oba et al., 1980). ... |
format |
Dataset |
author |
Ishiwatari, Ryoshi Houtatsu, M Okada, H |
author_facet |
Ishiwatari, Ryoshi Houtatsu, M Okada, H |
author_sort |
Ishiwatari, Ryoshi |
title |
(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
title_short |
(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
title_full |
(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
title_fullStr |
(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
title_full_unstemmed |
(Table 1) Oxygen isotope composition and comparison between ages and sea surface temperature from sediment core KH-79-3_L-3 ... |
title_sort |
(table 1) oxygen isotope composition and comparison between ages and sea surface temperature from sediment core kh-79-3_l-3 ... |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://dx.doi.org/10.1594/pangaea.802169 https://doi.pangaea.de/10.1594/PANGAEA.802169 |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1016/s0146-6380(00)00151-0 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.80216910.1016/s0146-6380(00)00151-0 |
_version_ |
1810457879645257728 |