noaa-ocean-13180
Gulf of Alaska 17,000 Year Paleoproductivity Data
Addison, J.A.; Finney, B.P.; Dean, W.E.; Davies, M.H.; Mix, A.C.; Stoner, J.S.; Jaeger, J.M.
Gulf of Alaska 17,000 Year Paleoproductivity Data
2012-08-01
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/13180
Investigator
J.A.
Addison
Investigator
B.P.
Finney
Investigator
W.E.
Dean
Investigator
M.H.
Davies
Investigator
A.C.
Mix
Investigator
J.S.
Stoner
Investigator
J.M.
Jaeger
earth science
paleoclimate
paleoceanography
depth,null,null,centimeter,null,paleoceanography,composited,null,N,null
earth science
paleoclimate
paleoceanography
cobalt,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
molybdenum,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
nitrogen,sediment,null,weight percent,null,paleoceanography,null,elemental analysis,N,null
earth science
paleoclimate
paleoceanography
age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null
earth science
paleoclimate
paleoceanography
organic carbon,sediment,null,weight percent,null,paleoceanography,null,elemental analysis,N,null
earth science
paleoclimate
paleoceanography
delta 15N,sediment,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,carbonate-free sample
earth science
paleoclimate
paleoceanography
carbonate,sediment,null,weight percent,null,paleoceanography,null,carbon coulometry|inductively-coupled plasma atomic emission spectroscopy,N,null
earth science
paleoclimate
paleoceanography
uranium,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
delta 15N,sediment,null,per mil,null,paleoceanography,corrected,isotope ratio mass spectrometry,N,carbonate-free sample
earth science
paleoclimate
paleoceanography
manganese,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
biogenic silica,sediment,null,weight percent,null,paleoceanography,null,spectrophotometry,N,null
earth science
paleoclimate
paleoceanography
delta 13C,organic matter,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,carbonate-free sample
earth science
paleoclimate
paleoceanography
chromium,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
aluminum,sediment,null,weight percent,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleoceanography
cadmium,sediment,null,parts per million,null,paleoceanography,null,inductively-coupled plasma atomic emission spectroscopy|inductively-coupled plasma mass spectrometry,N,null
earth science
paleoclimate
paleocean
geochemistry
earth science
paleoclimate
paleocean
carbon isotopes
earth science
paleoclimate
paleocean
nitrogen isotopes
geoscientificInformation
Younger Dryas
17394 cal yr BP
1085 cal yr BP
Complete
59.555
59.555
-144.1535
-144.1535
-682
-682
Ocean
Pacific Ocean
North Pacific Ocean
Gulf Of Alaska
EW0408-85JC>LATITUDE 59.555>LONGITUDE -144.1535
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
Addison, J.A., B.P. Finney, W.E. Dean, M.H. Davies, A.C. Mix,
J.S. Stoner, and J.M. Jaeger. 2012.
Productivity and sedimentary d15N variability for the last 17,000
years along the northern Gulf of Alaska continental slope.
Paleoceanography, Vol. 27, PA1206, doi:10.1029/2011PA002161.
Biogenic opal, organic carbon, organic matter stable isotope,
and trace metal data from a well-dated, high-resolution jumbo
piston core (EW0408-85JC; 59°33.3'N, 144°9.21'W, 682 m water depth)
recovered from the northern Gulf of Alaska continental slope reveal
changes in productivity and nutrient utilization over the last
17,000 years. Maximum values of opal concentration (~10%) occur
during the deglacial Bølling-Allerød (B-A) interval and earliest
Holocene (11.2 to 10.8 cal ka BP), moderate values (~6%) occur
during the Younger Dryas (13.0 to 11.2 cal ka BP) and Holocene,
and minimum values (~3.5%) occur during the Late Glacial Interval
(LGI). When converted to opal mass accumulation rates, the highest
values (~5000 g cm-2 kyr-1) occur during the LGI prior to 16.7
cal ka BP, which points to a strong influence by LGI glaciomarine
sedimentation regimes. Similar patterns are also observed in total
organic carbon and cadmium paleoproductivity proxies. Mid-Holocene
peaks in the terrestrial organic matter fraction at 5.5, 4.7, 3.5,
and 1.2 cal ka BP indicate periods of enhanced delivery of glaciomarine
sediments by the Alaska Coastal Current. The B-A and earliest Holocene
intervals are laminated, and enrichments of redox-sensitive elements
suggest dysoxic-to-anoxic conditions in the water column.
The laminations are also associated with mildly enriched sedimentary
d15N ratios, indicating a link between productivity, nitrogen cycle
dynamics, and sedimentary anoxia. After applying a correction for
terrestrial d15N contributions based on end-member mixing models
of terrestrial and marine organic matter, the resulting B-A marine
d15N (6.3 ± 0.4 ‰) ratios are consistent with either mild
denitrification, or increased nitrate utilization. These findings
can be explained by increased micronutrient (Fe) availability during
episodes of rapid rising sea level that released iron from the
previously subaerial coastal plain; iron input from enhanced
terrestrial runoff; and/or the intermittent presence of seasonal
sea ice resulting from altered ocean/atmospheric circulation
during the B-A in the Gulf of Alaska.
STUDY NOTES: Multiproxy sediment paleoproductivity data from a jumbo piston
core collected on the northern Gulf of Alaska continental slope.
Proxy data measured include biogenic opal, organic carbon,
organic matter stable isotopes, and trace metal data.
These organic and inorganic geochemical data are from the northern
continental slope of the Gulf of Alaska, and span from 1.1 to 17.4
calibrated kyrs ago. This marine sediment record is continuous
and well-dated by 37 AMS radiocarbon dates on planktonic foraminifera
(see Davies et al., 2011 for further information).
Opal was measured by a 0.1 M NaCO3 extraction and a molybdate-blue
spectrophotometric method (Mortlock and Froehlich, 1989).
Total organic carbon (TOC) and total nitrogen (TN) were measured
on a carbonate-free subsample by combustion in a Costech 4010 HCNS
elemental analyzer. Organic matter d13C and sedimentary d15N were
measured on a carbonate-free subsample using a Finnigan Delta-plus XP
isotope ratio mass spectrometer. CaCO3 data is a combination of total
Ca measured by ICP-OES (n = 110), calibrated with a smaller number
of CaCO3 coulometric measurements (n = 43). Inorganic element
concentrations (Al, Mn, Co, Cr, U, Mo, and Cd) were measured by
a combination of ICP-OES and ICP-MS at SGS Minerals Services
in Toronto, Canada.
A terrestrial-N-corrected dataset of sedimentary d15N is also included.
This data reflects the application of a linear endmember mixing model
between terrestrial and marine organic matter to remove the influence
of terrestrial N from the bulk sedimentary d15N measurements.
These data should be considered on a qualitative basis only.
Please see Addison et al. (2012) or contact the author directly
for further information.
Core EW0408-85JC: 59°33.3'N, 144°9.21'W, 682 m water depth
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/addison2012/addison2012.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/addison2012/addison2012.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11