(Table 1) Age determination of sediments of the Straits of Florida
The salinity and temperature of the Florida Current are key parameters affecting the transport of heat into the North Atlantic, yet little is known about their variability on centennial timescales. Here we report replicated, high-resolution foraminiferal records of Florida Current surface hydrograph...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834899 2023-05-15T17:32:39+02:00 (Table 1) Age determination of sediments of the Straits of Florida Lund, David C Curry, William B MEDIAN LATITUDE: 24.558267 * MEDIAN LONGITUDE: -80.605400 * SOUTH-BOUND LATITUDE: 24.326700 * WEST-BOUND LONGITUDE: -83.256600 * NORTH-BOUND LATITUDE: 24.757500 * EAST-BOUND LONGITUDE: -79.268700 * DATE/TIME START: 2002-01-13T00:00:00 * DATE/TIME END: 2002-01-22T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.0050 m * MAXIMUM DEPTH, sediment/rock: 0.3650 m 2006-08-14 text/tab-separated-values, 48 data points https://doi.pangaea.de/10.1594/PANGAEA.834899 https://doi.org/10.1594/PANGAEA.834899 en eng PANGAEA Lund, David C; Curry, William B (2004): Late Holocene variability in Florida Current surface density: Patterns and possible causes. Paleoceanography, 19(4), PA4001, https://doi.org/10.1029/2004PA001008 https://doi.pangaea.de/10.1594/PANGAEA.834899 https://doi.org/10.1594/PANGAEA.834899 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lund, David C; Curry, William B (2006): Florida Current surface temperature and salinity variability during the last millennium. Paleoceanography, 21(2), PA2009, https://doi.org/10.1029/2005PA001218 Age 14C AMS 14C calibrated CALIB 4.3 (Stuiver et al. 1998) dated dated standard error Calendar age Depth bottom/max sediment/rock top/min Event label Florida Strait KN166-2 Knorr KNR166-2 KNR166-2-118 KNR166-2-125 KNR166-2-62 MUC MultiCorer Sample comment Sedimentation rate Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.834899 https://doi.org/10.1029/2005PA001218 https://doi.org/10.1029/2004PA001008 2023-01-20T09:03:37Z The salinity and temperature of the Florida Current are key parameters affecting the transport of heat into the North Atlantic, yet little is known about their variability on centennial timescales. Here we report replicated, high-resolution foraminiferal records of Florida Current surface hydrography for the last millennium from two coring sites, Dry Tortugas and the Great Bahama Bank. The oxygen isotopic composition of Florida Current surface water (d18Ow) near Dry Tortugas increased 0.4‰ during the course of the Little Ice Age (LIA) (~1200–1850 A.D.), equivalent to a salinity increase of 0.8–1.5. On the Great Bahama Bank, where surface waters are influenced by the North Atlantic subtropical gyre, d18Ow increased by 0.3‰ during the last 200 years. Although a portion (~0.1 per mil) of this shift may be an artifact of anthropogenically driven changes in surface water SumCO2, the remaining d18Ow signal implies a 0.4–1 increase in salinity after 200 years B.P. The simplest explanation of the d18Ow data is southward migration of the Atlantic Hadley circulation during the LIA. Scaling of the d18Ow records to salinity using the modern low-latitude d18Ow-S slope produces an unrealistic reversal in the salinity gradient between the two sites. Only if d18Ow is scaled to salinity using a high-latitude d18Ow-S slope can the records be reconciled. Variable atmospheric 14C paralleled Dry Tortugas d18Ow, suggesting that solar irradiance paced centennial-scale migration of the Inter-Tropical Convergence Zone and changes in Florida Current salinity during the last millennium. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-83.256600,-79.268700,24.757500,24.326700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age 14C AMS 14C calibrated CALIB 4.3 (Stuiver et al. 1998) dated dated standard error Calendar age Depth bottom/max sediment/rock top/min Event label Florida Strait KN166-2 Knorr KNR166-2 KNR166-2-118 KNR166-2-125 KNR166-2-62 MUC MultiCorer Sample comment Sedimentation rate |
spellingShingle |
Age 14C AMS 14C calibrated CALIB 4.3 (Stuiver et al. 1998) dated dated standard error Calendar age Depth bottom/max sediment/rock top/min Event label Florida Strait KN166-2 Knorr KNR166-2 KNR166-2-118 KNR166-2-125 KNR166-2-62 MUC MultiCorer Sample comment Sedimentation rate Lund, David C Curry, William B (Table 1) Age determination of sediments of the Straits of Florida |
topic_facet |
Age 14C AMS 14C calibrated CALIB 4.3 (Stuiver et al. 1998) dated dated standard error Calendar age Depth bottom/max sediment/rock top/min Event label Florida Strait KN166-2 Knorr KNR166-2 KNR166-2-118 KNR166-2-125 KNR166-2-62 MUC MultiCorer Sample comment Sedimentation rate |
description |
The salinity and temperature of the Florida Current are key parameters affecting the transport of heat into the North Atlantic, yet little is known about their variability on centennial timescales. Here we report replicated, high-resolution foraminiferal records of Florida Current surface hydrography for the last millennium from two coring sites, Dry Tortugas and the Great Bahama Bank. The oxygen isotopic composition of Florida Current surface water (d18Ow) near Dry Tortugas increased 0.4‰ during the course of the Little Ice Age (LIA) (~1200–1850 A.D.), equivalent to a salinity increase of 0.8–1.5. On the Great Bahama Bank, where surface waters are influenced by the North Atlantic subtropical gyre, d18Ow increased by 0.3‰ during the last 200 years. Although a portion (~0.1 per mil) of this shift may be an artifact of anthropogenically driven changes in surface water SumCO2, the remaining d18Ow signal implies a 0.4–1 increase in salinity after 200 years B.P. The simplest explanation of the d18Ow data is southward migration of the Atlantic Hadley circulation during the LIA. Scaling of the d18Ow records to salinity using the modern low-latitude d18Ow-S slope produces an unrealistic reversal in the salinity gradient between the two sites. Only if d18Ow is scaled to salinity using a high-latitude d18Ow-S slope can the records be reconciled. Variable atmospheric 14C paralleled Dry Tortugas d18Ow, suggesting that solar irradiance paced centennial-scale migration of the Inter-Tropical Convergence Zone and changes in Florida Current salinity during the last millennium. |
format |
Dataset |
author |
Lund, David C Curry, William B |
author_facet |
Lund, David C Curry, William B |
author_sort |
Lund, David C |
title |
(Table 1) Age determination of sediments of the Straits of Florida |
title_short |
(Table 1) Age determination of sediments of the Straits of Florida |
title_full |
(Table 1) Age determination of sediments of the Straits of Florida |
title_fullStr |
(Table 1) Age determination of sediments of the Straits of Florida |
title_full_unstemmed |
(Table 1) Age determination of sediments of the Straits of Florida |
title_sort |
(table 1) age determination of sediments of the straits of florida |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834899 https://doi.org/10.1594/PANGAEA.834899 |
op_coverage |
MEDIAN LATITUDE: 24.558267 * MEDIAN LONGITUDE: -80.605400 * SOUTH-BOUND LATITUDE: 24.326700 * WEST-BOUND LONGITUDE: -83.256600 * NORTH-BOUND LATITUDE: 24.757500 * EAST-BOUND LONGITUDE: -79.268700 * DATE/TIME START: 2002-01-13T00:00:00 * DATE/TIME END: 2002-01-22T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.0050 m * MAXIMUM DEPTH, sediment/rock: 0.3650 m |
long_lat |
ENVELOPE(-83.256600,-79.268700,24.757500,24.326700) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Lund, David C; Curry, William B (2006): Florida Current surface temperature and salinity variability during the last millennium. Paleoceanography, 21(2), PA2009, https://doi.org/10.1029/2005PA001218 |
op_relation |
Lund, David C; Curry, William B (2004): Late Holocene variability in Florida Current surface density: Patterns and possible causes. Paleoceanography, 19(4), PA4001, https://doi.org/10.1029/2004PA001008 https://doi.pangaea.de/10.1594/PANGAEA.834899 https://doi.org/10.1594/PANGAEA.834899 |
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.834899 https://doi.org/10.1029/2005PA001218 https://doi.org/10.1029/2004PA001008 |
_version_ |
1766130858086891520 |