Statistical analysis of bulk nitrogen isotopes from IODP Site 323-U1342

• Main Authors: Knudson, Karla P, Ravelo, Ana Christina
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: 323-U1342A; 323-U1342C; 323-U1342D; AGE; Bering Sea; Bering Sea Paleoceanography; Bulk Sediment; Color reflectance interval 850-950 nm wavelength; d15N; Depth; bottom/max; sediment/rock; top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp323; IODP Exp. 323; iron fertilization; Joides Resolution; Latitude of event; Longitude of event; nitrogen; nitrogen cycling; nitrogen isotope; nitrogen utilization; North Pacific; productivity; Sample code/label; Site U1342; Standard score; Statistical analysis; Statistics; δ15N; Pacific
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.932990

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.