noaa-forcing-23550
Paleo-pCO2 Database ODP999 1.2 Million Year Boron Isotope and CO2 Data
Chalk, T.B.; Hain, M.P.; Foster, G.L.; Rohling, E.J.; Sexton, P.F.; Badger, M.P.S.; Cherry, S.G.; Hasenfratz, A.P.; Haug, G.H.; Jaccard, S.L.; Martínez-García, A.; Pälike, H.; Pancost, R.D.; Wilson, P.A.
Paleo-pCO2 Database ODP999 1.2 Million Year Boron Isotope and CO2 Data
2018-03-09
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/23550
Investigator
T.B.
Chalk
Investigator
M.P.
Hain
Investigator
G.L.
Foster
Investigator
E.J.
Rohling
Investigator
P.F.
Sexton
Investigator
M.P.S.
Badger
Investigator
S.G.
Cherry
Investigator
A.P.
Hasenfratz
Investigator
G.H.
Haug
Investigator
S.L.
Jaccard
Investigator
A.
Martínez-García
Investigator
H.
Pälike
Investigator
R.D.
Pancost
Investigator
P.A.
Wilson
earth science
paleoclimate
climate forcing|climate reconstructions|paleoceanography
age,null,null,calendar year before present,null,climate forcing|climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
magnesium/calcium,Globigerinoides ruber white,two standard deviations,millimole per mole,null,paleoceanography,null,null,N,G. ruber white sensu stricto
earth science
paleoclimate
climate reconstructions|paleoceanography
pH,delta 11B,null,dimensionless,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
climate reconstructions|paleoceanography
sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 11B,Globigerinoides ruber white,null,per mil,null,paleoceanography,averaged,multiple collector inductively-coupled plasma mass spectrometry,N,G. ruber white sensu stricto; column chemistry
earth science
paleoclimate
paleoceanography
magnesium/calcium,Globigerinoides ruber white,null,millimole per mole,null,paleoceanography,null,null,N,G. ruber white sensu stricto
earth science
paleoclimate
climate forcing|paleoceanography
carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|paleoceanography,null,null,N,based on planktic foram delta 11B
earth science
paleoclimate
climate forcing|paleoceanography
carbon dioxide,bulk atmosphere,two standard deviations lower bound,parts per million,null,climate forcing|paleoceanography,null,null,N,based on planktic foram delta 11B
earth science
paleoclimate
climate forcing|paleoceanography
carbon dioxide,bulk atmosphere,two standard deviations upper bound,parts per million,null,climate forcing|paleoceanography,null,null,N,based on planktic foram delta 11B
earth science
paleoclimate
paleoceanography
delta 11B,Globigerinoides ruber white,two standard deviations,per mil,null,paleoceanography,null,multiple collector inductively-coupled plasma mass spectrometry,N,G. ruber white sensu stricto; column chemistry
earth science
paleoclimate
climate forcing
carbon dioxide
geoscientificInformation
1243250 cal yr BP
111320 cal yr BP
Complete
12.75
12.75
-78.73
-78.73
-2827
-2827
Ocean
Pacific Ocean
North Pacific Ocean
ODP 999A>LATITUDE 12.75>LONGITUDE -78.73
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Thomas B. Chalk, Mathis P. Hain, Gavin L. Foster, Eelco J. Rohling, Philip F. Sexton, Marcus P.S. Badger, Soraya G. Cherry, Adam P. Hasenfratz, Gerald H. Haug, Samuel L. Jaccard, Alfredo Martínez-García, Heiko Pälike, Richard D. Pancost and Paul A. Wilson
2017
Causes of ice age intensification across the Mid-Pleistocene Transition
Proceedings of the National Academy of Sciences
114
50
13114-13119
10.1073/pnas.1702143114
http://www.pnas.org/content/114/50/13114
During the Mid-Pleistocene Transition (MPT; 1,200-800 kya), Earth's orbitally paced ice age cycles intensified, lengthened from ~40,000 (~40 ky) to ~100 ky, and became distinctly asymmetrical. Testing hypotheses that implicate changing atmospheric CO2 levels as a driver of the MPT has proven difficult with available observations. Here, we use orbitally resolved, boron isotope CO2 data to show that the glacial to interglacial CO2 difference increased from ~43 to ~75 uatm across the MPT, mainly because of lower glacial CO2 levels. Through carbon cycle modeling, we attribute this decline primarily to the initiation of substantive dust-borne iron fertilization of the Southern Ocean during peak glacial stages. We also observe a twofold steepening of the relationship between sea level and CO2-related climate forcing that is suggestive of a change in the dynamics that govern ice sheet stability, such as that expected from the removal of subglacial regolith or interhemispheric ice sheet phase-locking. We argue that neither ice sheet dynamics nor CO2 change in isolation can explain the MPT. Instead, we infer that the MPT was initiated by a change in ice sheet dynamics and that longer and deeper post-MPT ice ages were sustained by carbon cycle feedbacks related to dust fertilization of the Southern Ocean as a consequence of larger ice sheets.
STUDY NOTES: Paleo-CO2 derived from boron isotope measurements on marine sediment core ODP999A for the past 1.2 million years, contributed to the Paleo-pCO2 Database.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/chalk2017odp999boron.xlsx
Excel File; ODP999 Boron Isotope and CO2 Data
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/chalk2017odp999boron.txt
NOAA Template File; ODP999 Boron Isotope and CO2 Data
USA/NOAA
DIF
Version 9.8.4
2019-06-07
2019-06-07