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William M. Smethie Jr.

Affiliation: Lamont-Doherty Earth Observatory (LDEO)

Address: []

Orcid: 0000-0001-7580-8918

Project: U.S. GEOTRACES North Atlantic Transect (GA03) (5 datasets)

Dataset	Latest Version Date	Current State
Concentrations of CFC-11, CFC-12, CFC-113 and SF6 in seawater from R/V Knorr KN199-04 (GT10), KN204-01 (GT11) in the subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) Roles: Principal Investigator, Contact	2014-06-16	Final no updates expected
The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-06	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 39 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
Mean ventilation age reported for 7 regions of the Atlantic based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected

Project: U.S. Arctic GEOTRACES Study (GN01) (1 datasets)

Dataset	Latest Version Date	Current State
Concentrations of CFC-11, CFC-12, CFC-113 and SF6 in seawater from the GEOTRACES-Arctic program, aboard RV/HLY-1502, 2015. Role: Principal Investigator	2016-10-24	Final no updates expected

Project: US GEOTRACES Arctic Section - Water mass composition, circulation and mean residence times derived from measurements of natural and manmade tracers (1 datasets)

Dataset	Latest Version Date	Current State
Concentrations of CFC-11, CFC-12, CFC-113 and SF6 in seawater from the GEOTRACES-Arctic program, aboard RV/HLY-1502, 2015. Role: Principal Investigator	2016-10-24	Final no updates expected

Project: U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (5 datasets)

Dataset	Latest Version Date	Current State
Concentrations of CFC-11, CFC-12, CFC-113 and SF6 in seawater from R/V Knorr KN199-04 (GT10), KN204-01 (GT11) in the subtropical northern Atlantic Ocean from 2010-2011 (U.S. GEOTRACES NAT project) Roles: Principal Investigator, Contact	2014-06-16	Final no updates expected
The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-06	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 39 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
Mean ventilation age reported for 7 regions of the Atlantic based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected

Project: RAPID: Continuation of U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (4 datasets)

Dataset	Latest Version Date	Current State
The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-06	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 39 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
Mean ventilation age reported for 7 regions of the Atlantic based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected

Project: Collaborative Research: Completing a 10-Year Record of Deep Western Boundary Current Observations at Line W; A Contribution to the Atlantic Meridional Overturning Circulation Study (4 datasets)

Dataset	Latest Version Date	Current State
The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-06	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
The fraction of water last ventilated in a given region in a time less than or equal to 39 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected
Mean ventilation age reported for 7 regions of the Atlantic based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 Role: Principal Investigator	2020-05-07	Final no updates expected

Project: Collaborative Research: Probing the Ventilation Efficiency of the Deep Ocean with Conservative Dissolved Gas Tracers in Archived Samples (3 datasets)

Dataset	Latest Version Date	Current State
Model simulations of elemental and isotopic heavy noble gas ratios using the Transport Matrix Method (TMM) Role: Co-Principal Investigator	2023-02-21	Final no updates expected
Elemental and isotopic noble gas ratios from the Bermuda Atlantic Time-series (BATS) on cruise 10391 on R/V Atlantic Explorer (AE2208) from 30 April 2022 to 05 May 2022 Role: Co-Principal Investigator	2023-02-22	Final no updates expected
Measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program North Atlantic Survey (NAS) Role: Co-Principal Investigator	2023-02-23	Final no updates expected

Project: Collaborative Research: Novel constraints on air-sea gas exchange and deep ocean ventilation from high-precision noble gas isotope measurements in seawater (3 datasets)

Dataset	Latest Version Date	Current State
Model simulations of elemental and isotopic heavy noble gas ratios using the Transport Matrix Method (TMM) Role: Co-Principal Investigator	2023-02-21	Final no updates expected
Elemental and isotopic noble gas ratios from the Bermuda Atlantic Time-series (BATS) on cruise 10391 on R/V Atlantic Explorer (AE2208) from 30 April 2022 to 05 May 2022 Role: Co-Principal Investigator	2023-02-22	Final no updates expected
Measurements of Kr/Ar and N2/Ar ratios in stored dissolved gas samples collected in 1981 through the Transient Tracers in the Ocean (TTO) program North Atlantic Survey (NAS) Role: Co-Principal Investigator	2023-02-23	Final no updates expected