Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A)
Future warming is predicted to shift the Earth system into a mode with progressive increase and vigour of extreme climate events possibly stimulating other mechanisms that invigorate global warming. This study provides new data and modelling investigating climatic consequences and biogeochemical fee...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.707276 2023-05-15T17:37:10+02:00 Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) Wagner, Thomas Wallmann, Klaus Herrle, Jens O Hofmann, Peter Stuesser, Isabel LATITUDE: 33.664300 * LONGITUDE: -9.364700 * DATE/TIME START: 1981-04-23T00:00:00 * DATE/TIME END: 1981-04-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 389.00 m * MAXIMUM DEPTH, sediment/rock: 393.00 m 2007-11-12 text/tab-separated-values, 1834 data points https://doi.pangaea.de/10.1594/PANGAEA.707276 https://doi.org/10.1594/PANGAEA.707276 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.707276 https://doi.org/10.1594/PANGAEA.707276 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wagner, Thomas; Wallmann, Klaus; Herrle, Jens O; Hofmann, Peter; Stuesser, Isabel (2007): Consequences of moderate ~25,000 yr lasting emission of light CO2 into the mid-Cretaceous ocean. Earth and Planetary Science Letters, 259(1-2), 200-211, https://doi.org/10.1016/j.epsl.2007.04.045 79-545 Accumulation rate aluminium phosphorus total organic carbon Calculated Carbon organic total Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Glomar Challenger Leg79 North Atlantic/PLATEAU Sample code/label Sedimentation rate Vanadium/Aluminium ratio δ13C carbonate organic carbon Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.707276 https://doi.org/10.1016/j.epsl.2007.04.045 2023-01-20T08:46:52Z Future warming is predicted to shift the Earth system into a mode with progressive increase and vigour of extreme climate events possibly stimulating other mechanisms that invigorate global warming. This study provides new data and modelling investigating climatic consequences and biogeochemical feedbacks that happened in a warmer world ~112 Myr ago. Our study focuses on the Cretaceous Oceanic Anoxic Event (OAE) 1b and explores how the Earth system responded to a moderate ~25,000 yr lasting climate perturbation that is modelled to be less than 1 °C in global average temperature. Using a new chronological model for OAE 1b we present high-resolution elemental and bulk carbon isotope records from DSDP Site 545 from Mazagan Plateau off NW Africa and combine this information with a coupled atmosphere-land-ocean model. The simulations suggest that a perturbation at the onset of OAE 1b caused almost instantaneous warming of the atmosphere on the order of 0.3 °C followed by a longer (~45,000 yr) period of ~0.8 °C cooling. The marine records from DSDP Site 545 support that these moderate swings in global climate had immediate consequences for African continental supply of mineral matter and nutrients (phosphorous), subsequent oxygen availability, and organic carbon burial in the eastern subtropical Atlantic, however, without turning the ocean anoxic. The match between modelling results and stratigraphic isotopic data support previous studies [summarized in Jenkyns 2003, doi:10.1098/rsta.2003.1240] in that methane emission from marine hydrates, albeit moderate in dimension, may have been the trigger for OAE 1b, though we can not finally rule out alternative mechanisms. Following the hydrate mechanism a total of 1.15 * 10**18 g methane carbon (delta13C=-60 per mil ), equivalent to about 10% to the total modern gas hydrate inventory, generated the delta13Ccarb profile recorded in the section. Modelling suggests a combination of moderate-scale methane pulses supplemented by continuous methane emission at elevated levels over ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-9.364700,-9.364700,33.664300,33.664300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
79-545 Accumulation rate aluminium phosphorus total organic carbon Calculated Carbon organic total Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Glomar Challenger Leg79 North Atlantic/PLATEAU Sample code/label Sedimentation rate Vanadium/Aluminium ratio δ13C carbonate organic carbon |
spellingShingle |
79-545 Accumulation rate aluminium phosphorus total organic carbon Calculated Carbon organic total Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Glomar Challenger Leg79 North Atlantic/PLATEAU Sample code/label Sedimentation rate Vanadium/Aluminium ratio δ13C carbonate organic carbon Wagner, Thomas Wallmann, Klaus Herrle, Jens O Hofmann, Peter Stuesser, Isabel Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
topic_facet |
79-545 Accumulation rate aluminium phosphorus total organic carbon Calculated Carbon organic total Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Glomar Challenger Leg79 North Atlantic/PLATEAU Sample code/label Sedimentation rate Vanadium/Aluminium ratio δ13C carbonate organic carbon |
description |
Future warming is predicted to shift the Earth system into a mode with progressive increase and vigour of extreme climate events possibly stimulating other mechanisms that invigorate global warming. This study provides new data and modelling investigating climatic consequences and biogeochemical feedbacks that happened in a warmer world ~112 Myr ago. Our study focuses on the Cretaceous Oceanic Anoxic Event (OAE) 1b and explores how the Earth system responded to a moderate ~25,000 yr lasting climate perturbation that is modelled to be less than 1 °C in global average temperature. Using a new chronological model for OAE 1b we present high-resolution elemental and bulk carbon isotope records from DSDP Site 545 from Mazagan Plateau off NW Africa and combine this information with a coupled atmosphere-land-ocean model. The simulations suggest that a perturbation at the onset of OAE 1b caused almost instantaneous warming of the atmosphere on the order of 0.3 °C followed by a longer (~45,000 yr) period of ~0.8 °C cooling. The marine records from DSDP Site 545 support that these moderate swings in global climate had immediate consequences for African continental supply of mineral matter and nutrients (phosphorous), subsequent oxygen availability, and organic carbon burial in the eastern subtropical Atlantic, however, without turning the ocean anoxic. The match between modelling results and stratigraphic isotopic data support previous studies [summarized in Jenkyns 2003, doi:10.1098/rsta.2003.1240] in that methane emission from marine hydrates, albeit moderate in dimension, may have been the trigger for OAE 1b, though we can not finally rule out alternative mechanisms. Following the hydrate mechanism a total of 1.15 * 10**18 g methane carbon (delta13C=-60 per mil ), equivalent to about 10% to the total modern gas hydrate inventory, generated the delta13Ccarb profile recorded in the section. Modelling suggests a combination of moderate-scale methane pulses supplemented by continuous methane emission at elevated levels over ... |
format |
Dataset |
author |
Wagner, Thomas Wallmann, Klaus Herrle, Jens O Hofmann, Peter Stuesser, Isabel |
author_facet |
Wagner, Thomas Wallmann, Klaus Herrle, Jens O Hofmann, Peter Stuesser, Isabel |
author_sort |
Wagner, Thomas |
title |
Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
title_short |
Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
title_full |
Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
title_fullStr |
Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
title_full_unstemmed |
Stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of DSDP Hole 79-545 (Appendix A) |
title_sort |
stable carbon isotope ratios and accumulation rates of organic carbon and nutrients of dsdp hole 79-545 (appendix a) |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.707276 https://doi.org/10.1594/PANGAEA.707276 |
op_coverage |
LATITUDE: 33.664300 * LONGITUDE: -9.364700 * DATE/TIME START: 1981-04-23T00:00:00 * DATE/TIME END: 1981-04-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 389.00 m * MAXIMUM DEPTH, sediment/rock: 393.00 m |
long_lat |
ENVELOPE(-9.364700,-9.364700,33.664300,33.664300) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Wagner, Thomas; Wallmann, Klaus; Herrle, Jens O; Hofmann, Peter; Stuesser, Isabel (2007): Consequences of moderate ~25,000 yr lasting emission of light CO2 into the mid-Cretaceous ocean. Earth and Planetary Science Letters, 259(1-2), 200-211, https://doi.org/10.1016/j.epsl.2007.04.045 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.707276 https://doi.org/10.1594/PANGAEA.707276 |
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.707276 https://doi.org/10.1016/j.epsl.2007.04.045 |
_version_ |
1766136928192692224 |