Mark A. Altabet

Affiliation: University of Massachusetts Dartmouth (UMass Dartmouth)

Address: []

Orcid: 0000-0003-3120-0710

Project: U.S. JGOFS Antarctic Environment and Southern Ocean Process Study (2 datasets)

Dataset	Latest Version Date	Current State
Natural nitrogen and carbon stable isotopic composition from RVIB Nathaniel B. Palmer and R/V Roger Revelle cruises in the Southern Ocean, 1997-1998 (U.S. JGOFS AESOPS project) Role: Principal Investigator	2002-10-02	Final no updates expected
Natural Nitrogen and Carbon stable isotopic composition, underway data from RVIB Nathaniel B. Palmer and R/V Roger Revelle cruises in the Southern Ocean, 1997-1998 (U.S. JGOFS AESOPS project) Role: Principal Investigator	2002-10-02	Final no updates expected

Project: Southern Ocean Iron Experiment (1 datasets)

Dataset	Latest Version Date	Current State
Particulate Organic Matter (POM) from R/V Melville, R/V Roger Revelle cruises COOK19MV, DRFT08RR from the Southern Ocean, south of New Zealand in 2002 (SOFeX project) Role: Principal Investigator	2007-04-01	Final no updates expected

Project: The Role of Regenerated Nitrogen for Rocky Shore Productivity (6 datasets)

Dataset	Latest Version Date	Current State
Ammonium in tidepools with and without mussels from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-11-04	Final no updates expected
Seawater and filter sample nitrogen and carbon isotopes from coastal and off-shore sites from multiple cruises in the coastal Washington, 2009-2012 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-03-20	Final no updates expected
Ammonium levels in incubated bottles in tidepools from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-11-04	Final no updates expected
Content of nitrogen and carbon in tracer filters from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-01-24	Final no updates expected
Natural abundance of nitrogen and carbon on filters from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-11-04	Final no updates expected
Macroalgal contribution to NH4+ removal in tidepools from Cape Flattery, WA from 2010-2011 (Regenerated Nitrogen project) Role: Co-Principal Investigator	2014-11-04	Final no updates expected

Project: U.S. GEOTRACES East Pacific Zonal Transect (GP16) (1 datasets)

Dataset	Latest Version Date	Current State
Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) Role: Co-Principal Investigator	2016-06-24	Final no updates expected

Project: GEOTRACES Peru-Tahiti Nitrogen Isotope Measurements (1 datasets)

Dataset	Latest Version Date	Current State
Nitrate isotope data from R/V Thomas G. Thompson cruise TN303 in the Eastern Tropical Pacific in 2013 (U.S. GEOTRACES EPZT project) Role: Co-Principal Investigator	2016-06-24	Final no updates expected

Project: Collaborative Research: Autonomous Lagrangian Floats for Oxygen Minimum Zone Biogeochemistry (1 datasets)

Dataset	Latest Version Date	Current State
Vertical profiles of N2 gas concentrations in excess of equilibrium values along with the isotopic composition of total N2, NO3- and NO2- from R/V New Horizon cruise NH1410 in the Eastern Tropical North Pacific from May to June 2014 Role: Principal Investigator	2017-06-20	Final no updates expected

Project: Collaborative Research: GEOTRACES Arctic Ocean section-Constraining Nitrogen Cycling in the western Arctic Ocean. (1 datasets)

Dataset	Latest Version Date	Current State
N2 gas concentration in excess of saturation determined by N2:Ar ratiometry from samples collected in the Bering Sea, Chukchi Sea, and Western Arctic on cruise HLY1702 from August to September 2017 Role: Principal Investigator	2020-05-20	Final no updates expected

Project: Collaborative Research: Did the SE Pacific Gyre become a Hot Spot for N2 Fixation during Dusty Glacial Conditions? (1 datasets)

Dataset	Latest Version Date	Current State
Radiocarbon dating of archived sediment cores in the Southeast Pacific from 1960 to 2000 Roles: Principal Investigator, Contact	2023-01-12	Final no updates expected

Project: Collaborative Research: Multiyear autonomous measurement of N-loss in the ETNP ODZ (4 datasets)

Dataset	Latest Version Date	Current State
Oxygen and Gas Tension data collected from Argo Floats Deployed from the RV Sally Ride Cruises SR2011 and SR2114 in the Eastern Tropical North Pacific from 2020 to 2023 (N-loss in the ETNP ODZ project) Role: Co-Principal Investigator	2025-08-26	Preliminary and in progress
Oxygen and Gas Tension data collected from ODZ Floats Deployed from the RV Sally Ride Cruises SR2011 and SR2114 in the Eastern Tropical North Pacific from 2020 to 2023 (N-loss in the ETNP ODZ project) Role: Co-Principal Investigator	2025-08-26	Preliminary and in progress
Sally Ride STOX Oxygen Profiles Role: Co-Principal Investigator	2025-09-15	Preliminary and in progress
CTD Bottle Data from R/V Sally Ride cruise SR2114 in the Eastern Tropical North Pacific, December 2021–January 2022 (N-loss in the ETNP ODZ project) Role: Principal Investigator	2025-09-17	Final no updates expected