R. Lawrence Edwards

Affiliation: University of Minnesota

Address: []

Orcid: 0000-0002-7027-5881

Project: U.S. GEOTRACES North Atlantic Transect (GA03) (1 datasets)

Dataset	Latest Version Date	Current State
Depth profiles of dissolved, small and large particulate 232Th, 230Th, and 231Pa from R/V Knorr KN199-04, KN204-01, subtropical North Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) Role: Principal Investigator	2016-05-16	Final no updates expected

Project: U.S. GEOTRACES East Pacific Zonal Transect (GP16) (2 datasets)

Dataset	Latest Version Date	Current State
Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa during the GEOTRACES Equatorial Pacific Zonal Transect on cruise TN303 during 2013 Role: Co-Principal Investigator	2017-01-31	Final no updates expected
Small and large particulate Th and Pa samples from different depth profiles collected on R/V Thomas G. Thompson in the Eastern Tropical Pacific during 2013 (EPZT Th Pa project) Role: Co-Principal Investigator	2017-01-24	Final no updates expected

Project: U.S. Arctic GEOTRACES Study (GN01) (2 datasets)

Dataset	Latest Version Date	Current State
Concentrations of dissolved thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater, sea ice, and melt ponds collected during the U.S. GEOTRACES Arctic cruise (HLY1502, GN01) on USCGC Healy from August to October 2015 Role: Principal Investigator	2021-08-25	Final no updates expected
Concentrations of size-fractionated particulate thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater collected during the U.S. GEOTRACES Arctic cruise (HLY1502, GN01) on USCGC Healy from August to October 2015 Role: Principal Investigator	2021-08-25	Final no updates expected

Project: U.S. GEOTRACES Pacific Section: Analysis of 230Th, 232Th and 231Pa (2 datasets)

Dataset	Latest Version Date	Current State
Depth profiles of seawater dissolved 232Th, 230Th, and 231Pa during the GEOTRACES Equatorial Pacific Zonal Transect on cruise TN303 during 2013 Role: Co-Principal Investigator	2017-01-31	Final no updates expected
Small and large particulate Th and Pa samples from different depth profiles collected on R/V Thomas G. Thompson in the Eastern Tropical Pacific during 2013 (EPZT Th Pa project) Role: Co-Principal Investigator	2017-01-24	Final no updates expected

Project: US GEOTRACES Pacific Meridional Transect (GP15) (2 datasets)

Dataset	Latest Version Date	Current State
Dissolved thorium and protactinium isotopes (232Th, 230Th, 231Pa) in seawater from 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: Principal Investigator	2024-03-15	Final no updates expected
Dissolved thorium and protactinium isotopes (232Th, 230Th, 231Pa) in seawater from 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: Principal Investigator	2024-08-01	Final no updates expected

Project: Collaborative Research: U.S. GEOTRACES Pacific Meridional Transect: Thorium-232, Thorium-230 and Protactinium-231 as tracers of trace element supply and removal (2 datasets)

Dataset	Latest Version Date	Current State
Dissolved thorium and protactinium isotopes (232Th, 230Th, 231Pa) in seawater from 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: Principal Investigator	2024-03-15	Final no updates expected
Dissolved thorium and protactinium isotopes (232Th, 230Th, 231Pa) in seawater from 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: Principal Investigator	2024-08-01	Final no updates expected

Project: Collaborative Research: U.S. GEOTRACES Arctic Section: Thorium-230, Thorium-232, and Protactinium-231 tracers of trace element supply and removal. (2 datasets)

Dataset	Latest Version Date	Current State
Concentrations of dissolved thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater, sea ice, and melt ponds collected during the U.S. GEOTRACES Arctic cruise (HLY1502, GN01) on USCGC Healy from August to October 2015 Role: Principal Investigator	2021-08-25	Final no updates expected
Concentrations of size-fractionated particulate thorium and protactinium isotopes (Th-232, Th-230, Pa-231) in seawater collected during the U.S. GEOTRACES Arctic cruise (HLY1502, GN01) on USCGC Healy from August to October 2015 Role: Principal Investigator	2021-08-25	Final no updates expected