Citation:

PANGAEA.932990 (dataset in review)

Name: Statistical analysis of bulk nitrogen isotopes from IODP Site 323-U1342
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Bering Sea; Bulk Sediment; d15N; IODP Exp. 323; iron fertilization; nitrogen; nitrogen cycling; nitrogen isotope; nitrogen utilization; North Pacific; productivity; Site U1342; Statistics

Facebook TwitterShow Map Google Earth

Abstract:

Here, we present the results of a statistical analysis published in Knudson et al., (2021, Science Advances), which investigates nitrogen isotopes from Integrated Ocean Drilling Program Expedition 323 Site U1342 in the Bering Sea, from 0-1.2 Ma. We analyzed the Site U1342 15Nbulk record from Knudson and Ravelo (2015, Geophysical Research Letters, https://doi.org/10.1002/2015GL066317). In Knudson et al. (2021), the bulk d15N record was detrended and Z-scores were calculated to determine statistically significant peaks. Z-scores were significantly higher during laminated intervals compared to non-laminated intervals (0.779 versus -0.112, P ≤0.0001). These data, in combination with high-resolution paleo-productivity indicators at the same site, provide evidence for enhanced nitrate utilization during laminated intervals compared with non-laminated intervals.

Keyword(s):

Bering Sea; Bulk Sediment; d15N; IODP Exp. 323; iron fertilization; nitrogen; nitrogen cycling; nitrogen isotope; nitrogen utilization; North Pacific; productivity; Site U1342; Statistics

Related to:

Knudson, Karla P; Ravelo, Ana Christina; Aiello, Ivano W; Knudson, C P; Drake, Michelle K; Sakamoto, Tatsuhiko (accepted): Causes and Timing of Subarctic Pacific Hypoxia. Science Advances

Coverage:

Median Latitude: 54.828328 * Median Longitude: 176.916826 * South-bound Latitude: 54.828312 * West-bound Longitude: 176.916712 * North-bound Latitude: 54.828362 * East-bound Longitude: 176.917053

Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 41.36 m

Event(s):

323-U1342A * Latitude: 54.828312 * Longitude: 176.916712 * Elevation: -818.3 m * Recovery: 57.39 m * Campaign: (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 53.3 m cored; 108 % recovered

323-U1342C * Latitude: 54.828362 * Longitude: 176.917053 * Elevation: -818.8 m * Recovery: 47.06 m * Campaign: (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 45.4 m cored; 104 % recovered

323-U1342D * Latitude: 54.828312 * Longitude: 176.916712 * Elevation: -818.2 m * Recovery: 86.37 m * Campaign: (Bering Sea Paleoceanography) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 127.7 m cored; 68 % recovered

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Knudson, Karla P
2	Longitude of event	Longitude		Knudson, Karla P
3	Latitude of event	Latitude		Knudson, Karla P
4	Sample code/label	Sample label		Knudson, Karla P	DSDP/ODP/IODP sample designation
5	Depth, top/min	Depth top	m	Knudson, Karla P		ccsf
6	Depth, bottom/max	Depth bot	m	Knudson, Karla P		ccsf
7	DEPTH, sediment/rock	Depth sed	m	Knudson, Karla P		Geocode – ccsf
8	AGE	Age	ka BP	Knudson, Karla P		Geocode
9	δ15N, bulk sediment	δ15N bulk	‰ air	Knudson, Karla P	Statistical analysis
10	δ15N, bulk sediment	δ15N bulk	‰ air	Knudson, Karla P	Statistical analysis	linear trend
11	Color reflectance interval 850-950 nm wavelength	Color 850-950	%	Knudson, Karla P	Statistical analysis	detrended
12	Standard score	Z-score		Knudson, Karla P	Statistical analysis

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

7613 data points

Download Data (login required)

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML (shows only first 2000 rows)