noaa-ocean-8716
Pichevin et al. 2007 Arabian Sea 50KYr Denitrification Data
Pichevin, L.; Bard, E.; Martinez, P.; Billy, I.
Pichevin et al. 2007 Arabian Sea 50KYr Denitrification Data
2009-12-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/8716
Investigator
L.
Pichevin
Investigator
E.
Bard
Investigator
P.
Martinez
Investigator
I.
Billy
earth science
paleoclimate
paleoceanography
nitrogen,sediment,null,weight percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 15N,sediment,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
organic carbon,sediment,null,weight percent,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
delta 15N,null,null,per mil,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,duplicate of NMR study?
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
nitrogen isotopes
geoscientificInformation
49549 cal yr BP
89 cal yr BP
Complete
24.842833
24.842833
64.008167
64.008167
-828
-828
Ocean
Indian Ocean
Arabian Sea
MD04-2876>LATITUDE 24.842833>LONGITUDE 64.008167
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
Pichevin, L., E. Bard, P. Martinez, and I. Billy. 2007. Evidence of ventilation changes in the Arabian Sea during the late Quaternary: Implication for denitrification and nitrous oxide emission. Global Biogeochem. Cycles, 21, GB4008. doi: 10.1029/2006GB002852
Modern seawater profiles of oxygen, nitrate deficit, and nitrogen isotopes reveal the spatial decoupling of summer monsoon-related productivity and denitrification maxima in the Arabian Sea (AS) and raise the possibility that winter monsoon and/or ventilation play a crucial role in modulating denitrification in the northeastern AS, both today and through the past. A new high-resolution 50-ka record of δ 15N from the Pakistan margin is compared to five other denitrification records distributed across the AS. This regional comparison unveils the persistence of east-west heterogeneities in denitrification intensity across millennial-scale climate shifts and throughout the Holocene. The oxygen minimum zone (OMZ) experienced east-west swings across Termination I and throughout the Holocene. Probable causes are (1) changes in ventilation due to millennial-scale variations in Antarctic Intermediate Water formation and (2) postglacial reorganization of intermediate circulation in the northeastern AS following sea level rise. Whereas denitrification in the world's OMZs, including the western AS, gradually declined following the deglacial maximum (10-9 ka BP), the northeastern AS record clearly witnesses increasing denitrification from about 8 ka BP. This would have impacted the global Holocene climate through sustained N2O production and marine nitrogen loss.
STUDY NOTES: Site is located within the present day Oxygen Minimum Zone (OMZ).
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/pichevin2007/pichevin2007.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md4-2876-tab.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11