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Mark Stephens

Affiliation: Florida International University (FIU)

Address: []

Orcid: https://orcid.org/0000-0002-2491-4654

Project: US GEOTRACES Pacific Meridional Transect (GP15) (4 datasets)

Dataset	Latest Version Date	Current State
Activities of 210Po and 210Pb on particles in two size classes obtained by in situ pumping on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Role: Co-Principal Investigator	2023-03-23	Final no updates expected
Activities of 210Po and 210Pb on particles in two size classes obtained by in situ pumping on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 Role: Co-Principal Investigator	2023-03-23	Final no updates expected
Dissolved and total water column 210Po and 210Pb from samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Role: Co-Principal Investigator	2023-01-06	Final no updates expected
Dissolved and total water column 210Po and 210Pb from samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 Role: Co-Principal Investigator	2023-01-31	Final no updates expected

Project: Collaborative Research: Defining the Atmospheric Deposition of Trace Elements Into The Arctic Ocean-Ice Ecosystem During The Year-Long MOSAiC Ice Drift (3 datasets)

Dataset	Latest Version Date	Current State
Arctic aerosol Be7 concentrations from the MOSAIC expedition on the R/V Polarstern in the Central Arctic Ocean from December 2019 to June 2020 Roles: Principal Investigator, Contact	2022-06-23	Final no updates expected
Ice core Be7 concentrations from the MOSAIC expedition on the R/V Polarstern in the Central Arctic Ocean from October 2019 to May 2020 Roles: Principal Investigator, Contact	2022-06-21	Final no updates expected
Snow and frost flower Be7 concentrations from the MOSAIC expedition on the R/V Polarstern in the Central Arctic Ocean from October 2019 to May 2020 Roles: Principal Investigator, Contact	2022-06-21	Final no updates expected

Project: Collaborative Research: Lead-210 and Polonium-210 as tracers for scavenging and export: GEOTRACES Pacific Meridional Section (4 datasets)

Dataset	Latest Version Date	Current State
Activities of 210Po and 210Pb on particles in two size classes obtained by in situ pumping on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Role: Co-Principal Investigator	2023-03-23	Final no updates expected
Activities of 210Po and 210Pb on particles in two size classes obtained by in situ pumping on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from Oct-Nov 2018 Role: Co-Principal Investigator	2023-03-23	Final no updates expected
Dissolved and total water column 210Po and 210Pb from samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018 Role: Co-Principal Investigator	2023-01-06	Final no updates expected
Dissolved and total water column 210Po and 210Pb from samples collected on Leg 2 (Hilo, HI to Papeete, French Polynesia) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1815) on R/V Roger Revelle from October to November 2018 Role: Co-Principal Investigator	2023-01-31	Final no updates expected

Project: US GEOTRACES GP17 Section: South Pacific and Southern Ocean (GP17-OCE) (1 datasets)

Dataset	Latest Version Date	Current State
Aerosol and seawater beryllium-7 concentrations from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 Role: Principal Investigator	2024-05-14	Final no updates expected

Project: Collaborative Research: Quantifying the atmospheric flux of bio-active trace elements to the southwestern Indian Ocean (1 datasets)

Dataset	Latest Version Date	Current State
Aerosol and seawater beryllium-7 concentrations from the French GEOTRACES GS02 SWINGS cruise aboard R/V Marion-Dufresne (MD229) from January to March 2021 Role: Principal Investigator	2024-05-15	Final no updates expected

Project: GEOTRACES GP-17 OCE: Measurement of 7Be as a Tracer of Upper Ocean Processes (1 datasets)

Dataset	Latest Version Date	Current State
Aerosol and seawater beryllium-7 concentrations from the US GEOTRACES GP17-OCE cruise on R/V Roger Revelle (RR2214) in the South Pacific and Southern Oceans from December 2022 to January 2023 Role: Principal Investigator	2024-05-14	Final no updates expected