Marine organic carbon burial increased forest fire frequency during Oceanic Anoxic Event 2

2020 ◽  
Vol 13 (10) ◽  
pp. 693-698
Author(s):  
F. Garrett Boudinot ◽  
Julio Sepúlveda
Keyword(s):  
Organic Carbon ◽  
Forest Fire ◽  
Fire Frequency ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event ◽  
Marine Organic Carbon

scholarly journals Orbital forcing of organic carbon burial in the proto-North Atlantic during oceanic anoxic event 2

2004 ◽  
Vol 228 (3-4) ◽  
pp. 465-482 ◽  
Author(s):  
Marcel M.M. Kuypers ◽  
Lucas J. Lourens ◽  
W. Irene C. Rijpstra ◽  
Richard D. Pancost ◽  
Ivar A. Nijenhuis ◽  
...  
Keyword(s):  
Organic Carbon ◽  
North Atlantic ◽  
Orbital Forcing ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

scholarly journals Supplemental Material: Quantifying volcanism and organic carbon burial across Oceanic Anoxic Event 2

2022 ◽  
Author(s):  
Nina Papadomanolaki ◽  
et al.
Keyword(s):  
Organic Carbon ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Supplemental information and methods, Figures S1–S4, and Tables S1 and S2.<br>

scholarly journals Supplemental Material: Quantifying volcanism and organic carbon burial across Oceanic Anoxic Event 2

2022 ◽  
Author(s):  
Nina Papadomanolaki ◽  
et al.
Keyword(s):  
Organic Carbon ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Supplemental information and methods, Figures S1–S4, and Tables S1 and S2.<br>

scholarly journals Enhanced Terrestrial Runoff during Oceanic Anoxic Event 2 on the North Carolina Coastal Plain, USA

2021 ◽  
Author(s):  
Christopher M. Lowery ◽  
Jean M. Self-Trail ◽  
Craig D. Barrie
Keyword(s):  
North Carolina ◽  
Organic Carbon ◽  
Coastal Plain ◽  
Hydrologic Cycle ◽  
Oceanic Anoxic Event ◽  
The North ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Abstract. A global increase in the strength of the hydrologic cycle drove an increase in flux of terrigenous sediments into the ocean during the Cenomanian-Turonian Oceanic Anoxic Event 2 (OAE2) and was an important mechanism driving nutrient enrichment and thus organic carbon burial. This global change is primarily known from isotopic records, but global average data don't tell us anything about changes at any particular location; such reconstructions of local terrigenous flux can help us understand the role of regional shifts in precipitation in driving these global trends. The North Atlantic basin was one of the epicenters of enhanced organic carbon burial during OAE2, and so constraining terrigenous flux is particularly important in this region; however, few local records exist. Here, we present two new OAE2 records from the Atlantic Coastal Plain of North Carolina, USA, recognized with calcareous nannoplankton biostratigraphy and organic carbon isotopes. We use carbon/nitrogen ratios to constrain the relative contribution of marine and terrestrial organic matter; in both cores we find elevated contribution from vascular plants beginning just before OAE2 and continuing through the event, indicating a locally strengthened hydrologic cycle. Terrigenous flux decreased during the brief change in carbon isotope values known as the Plenus carbon isotope excursion, and then increase and remain elevated through the latter part of OAE2. Total organic carbon values reveal relatively low organic carbon burial in the inner shelf, in contrast to black shales known from the open ocean. Organic carbon content on the shelf appears to increase in the offshore direction, highlighting the need for cores from the middle and outer shelf.

scholarly journals Enhanced terrestrial runoff during Oceanic Anoxic Event 2 on the North Carolina Coastal Plain, USA

2021 ◽  
Vol 17 (3) ◽  
pp. 1227-1242
Author(s):  
Christopher M. Lowery ◽  
Jean M. Self-Trail ◽  
Craig D. Barrie
Keyword(s):  
North Carolina ◽  
Organic Carbon ◽  
Carbon Isotope ◽  
Coastal Plain ◽  
Hydrologic Cycle ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Abstract. A global increase in the strength of the hydrologic cycle drove an increase in the flux of terrigenous sediments into the ocean during the Cenomanian–Turonian Oceanic Anoxic Event 2 (OAE2) and was an important mechanism driving nutrient enrichment and thus organic carbon burial. This global change is primarily known from isotopic records, but global average data do not tell us anything about changes at any particular location. Reconstructions of local terrigenous flux can help us understand the role of regional shifts in precipitation in driving these global trends. The proto-North Atlantic basin was one of the epicenters of enhanced organic carbon burial during OAE2, so constraining terrigenous flux is particularly important in this region; however, few local records exist. Here, we present two new OAE2 records from the Atlantic Coastal Plain of North Carolina, USA, recognized with calcareous nannoplankton biostratigraphy and organic carbon isotopes. We use carbon / nitrogen ratios to constrain the relative contribution of marine and terrestrial organic matter; in both cores we find an elevated contribution from vascular plants beginning just before OAE2 and continuing through the event, indicating a locally strengthened hydrologic cycle. Terrigenous flux decreased during the brief change in carbon isotope values known as the Plenus carbon isotope excursion; it then increased and remained elevated through the latter part of OAE2. Total organic carbon (TOC) values reveal relatively low organic carbon burial in the inner shelf, in contrast to black shales known from the open ocean. Organic carbon content on the shelf appears to increase in the offshore direction, highlighting the need for cores from the middle and outer shelf.

scholarly journals Equatorward phytoplankton migration during a cold spell within the Late Cretaceous supergreenhouse

2016 ◽  
Author(s):  
Niels A.G.M. van Helmond ◽  
Appy Sluijs ◽  
Nina M. Papadomanolaki ◽  
A.Guy Plint ◽  
Darren R. Gröcke ◽  
...  
Keyword(s):  
Bottom Water ◽  
Cold Spell ◽  
Cold Event ◽  
Climate Shift ◽  
Oceanic Anoxic Event ◽  
Rapid Climate Change ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Abstract. Oceanic Anoxic Event 2 (OAE2), a ~600 kyr episode close to the Cenomanian-Turonian boundary (ca. 94 Ma), is characterized by widespread marine anoxia and ranks amongst the warmest intervals of the Phanerozoic. The early stages of OAE2 are, however, marked by an episode of widespread transient cooling and bottom water oxygenation: the Plenus Cold Event. This cold spell has been linked to a decline in atmospheric pCO2, resulting from enhanced global organic carbon burial. To investigate the response of phytoplankton to this marked and rapid climate shift we examined the biogeographical response of dinoflagellates to the Plenus Cold Event. Our study is based on a newly generated geochemical and palynological dataset from a high-latitude Northern Hemisphere site, Pratts Landing (western Alberta, Canada). We combine this data with a semi-quantitative global compilation of the stratigraphic distribution of dinoflagellate cyst taxa. The data show that dinoflagellate cysts grouped in the Cyclonephelium compactum-membraniphorum morphological plexus migrated from high- to mid-latitudes during the Plenus Cold Event, making it the sole widely found (micro)fossil to mark this cold spell. In addition to earlier reports from regional metazoan migrations during the Plenus Cold Event, our findings illustrate the effect of rapid climate change on the global biogeographical dispersion of phytoplankton.

scholarly journals Equatorward phytoplankton migration during a cold spell within the Late Cretaceous super-greenhouse

2016 ◽  
Vol 13 (9) ◽  
pp. 2859-2872 ◽  
Author(s):  
Niels A. G. M. van Helmond ◽  
Appy Sluijs ◽  
Nina M. Papadomanolaki ◽  
A. Guy Plint ◽  
Darren R. Gröcke ◽  
...  
Keyword(s):  
Bottom Water ◽  
Cold Spell ◽  
Cold Event ◽  
Data Set ◽  
Climate Shift ◽  
Oceanic Anoxic Event ◽  
Carbon Burial ◽  
Organic Carbon Burial ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event

Abstract. Oceanic Anoxic Event 2 (OAE2), a  ∼  600 kyr episode close to the Cenomanian–Turonian boundary (ca. 94 Ma), is characterized by relatively widespread marine anoxia and ranks amongst the warmest intervals of the Phanerozoic. The early stages of OAE2 are, however, marked by an episode of widespread transient cooling and bottom water oxygenation: the Plenus Cold Event. This cold spell has been linked to a decline in atmospheric pCO2, resulting from enhanced global organic carbon burial. To investigate the response of phytoplankton to this marked and rapid climate shift we examined the biogeographical response of dinoflagellates to the Plenus Cold Event. Our study is based on a newly generated geochemical and palynological data set from a high-latitude Northern Hemisphere site, Pratts Landing (western Alberta, Canada). We combine these data with a semi-quantitative global compilation of the stratigraphic distribution of dinoflagellate cyst taxa. The data show that dinoflagellate cysts grouped in the Cyclonephelium compactum–membraniphorum morphological plexus migrated from high to mid-latitudes during the Plenus Cold Event, making it the sole widely found (micro)fossil to mark this cold spell. In addition to earlier reports from regional metazoan migrations during the Plenus Cold Event, our findings illustrate the effect of rapid climate change on the global biogeographical dispersion of phytoplankton.

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