noaa-model-6218
Schmittner et al. 2007 Ocean Oxygen and Nitrogen Cycle Model Simulations
Schmittner, A.; Galbraith, E.D.; Hostetler, S.W.; Pedersen, T.F.; Zhang, R.
Schmittner et al. 2007 Ocean Oxygen and Nitrogen Cycle Model Simulations
2007-01-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/6218
Investigator
A.
Schmittner
Investigator
E.D.
Galbraith
Investigator
S.W.
Hostetler
Investigator
T.F.
Pedersen
Investigator
R.
Zhang
earth science
paleoclimate
paleoclimatic modeling
latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
sea water y velocity,null,null,meter per second,null,paleoclimatic modeling,null,null,N,northward
earth science
paleoclimate
paleoclimatic modeling
sea water potential temperature,null,null,kelvin,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
meridional overturning streamfunction,null,null,sverdrup,null,paleoclimatic modeling,null,null,N,Maximum Atlantic Overturning
earth science
paleoclimate
paleoclimatic modeling
salinity,sea water,null,parts per thousand,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
sea water x velocity,null,null,meter per second,null,paleoclimatic modeling,null,null,N,eastward
earth science
paleoclimate
paleoclimatic modeling
oxygen,sea water,null,mole per cubic meter,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
model
geoscientificInformation
Complete
-90
90
-180
180
Geographic Region
Global
Global>LATITUDE >LONGITUDE
None
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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
Schmittner, A., E.D. Galbraith, S.W. Hostetler,
T.F. Pederson, and R. Zhang. 2007. Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction. Paleoceanography, 22, PA3207. doi:10.1029/2006PA001384.
Paleoclimate records from glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved oxygen levels and denitrification coherent with North Atlantic temperature oscillations. Yet the mechanism of this teleconnection between the remote ocean basins remains elusive. Here we present model simulations of the oxygen and nitrogen cycles that explain how changes in deepwater subduction in the North Atlantic can cause large and synchronous variations of oxygen minimum zones throughout the Northern Hemisphere of the Indian and Pacific oceans, consistent with the paleoclimate records. Cold periods in the North Atlantic are associated with reduced nutrient delivery to the upper Indo-Pacific oceans, thereby decreasing productivity. Reduced export production diminishes subsurface respiration of organic matter leading to higher oxygen concentrations and less denitrification. This effect of reduced oxygen consumption dominates at low latitudes. At high latitudes in the Southern Ocean and North Pacific, increased mixed layer depths and steepening of isopycnals improve ocean ventilation and oxygen supply to the subsurface. Atmospheric teleconnections through changes in wind-driven ocean circulation modify this basin-scale pattern regionally. These results suggest that changes in the Atlantic Ocean circulation, similar to those projected by climate models to possibly occur in the centuries to come because of anthropogenic climate warming, can have large effects on marine ecosystems and biogeochemical cycles even in remote areas.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/uvic/schmittner2007/readme-schmittner2007.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11