Dataset: 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

Name: 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
Published: 2020-05-06
Keywords: oceans

Final no updates expectedDOI: 10.26008/1912/bco-dmo.810696.1Version 1 (2020-05-06)Dataset Type:Cruise Results

Principal Investigator: William M. Smethie Jr. (Lamont-Doherty Earth Observatory)

Co-Principal Investigator, Contact: Mark Holzer (University of New South Wales)

Co-Principal Investigator: Yu-Heng Ting (University of New South Wales)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)

Program: U.S. GEOTRACES (U.S. GEOTRACES)

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

Project: U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT CFC and SF6)

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

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 (DWBC Obs Line W)

Abstract

Water mass fractions and ages calculated from hydrographic and tracer data using a maximum-entropy inversion technique. This dataset contains the fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) as well as the corresponding ensemble standard deviations.

Cite Dataset

Spatial Extent: N:39.70 E:-9.66 S:17.35 W:-69.83
Temporal Extent: 2010-10-16 - 2011-12-10

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Water mass fractions and ages calculated from hydrographic and tracer data using a maximum-entropy inversion technique.

This dataset contains the fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years) as well as the corresponding ensemble standard deviations.

Data File Formats:
For a .csv or .tsv format of these data, use the "Get Data" button at the top of the BCO-DMO metadata page.
For a Matlab file containing all of the water mass fraction data from this project, see the "Data Files" section of the BCO-DMO metadata page.

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Methods, Results

Holzer, M., Smethie, W. M., & Ting, Y.-H. (2018). Ventilation of the Subtropical North Atlantic: Locations and Times of Last Ventilation Estimated Using Tracer Constraints From GEOTRACES Section GA03. Journal of Geophysical Research: Oceans, 123(4), 2332–2352. doi:10.1002/2017jc013698

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Dataset: 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

Final no updates expectedDOI: 10.26008/1912/bco-dmo.810696.1Version 1 (2020-05-06)Dataset Type:Cruise Results

Principal Investigator: William M. Smethie Jr. (Lamont-Doherty Earth Observatory)

Co-Principal Investigator, Contact: Mark Holzer (University of New South Wales)

Co-Principal Investigator: Yu-Heng Ting (University of New South Wales)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)

Program: U.S. GEOTRACES (U.S. GEOTRACES)

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

Project: U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT CFC and SF6)

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

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 (DWBC Obs Line W)

Abstract

Cite Dataset

Spatial Extent: N:39.70 E:-9.66 S:17.35 W:-69.83
Temporal Extent: 2010-10-16 - 2011-12-10

XXX

Views

XX

Downloads

X

Citations

Water mass fractions and ages calculated from hydrographic and tracer data using a maximum-entropy inversion technique.

Related Datasets

No Related Datasets

Related Publications

Methods, Results

File(s)	Type	Description	Action
wmf_tau_all_yrs.csv (162.60 KB)	Comma Separated Values (.csv)	Primary data file for dataset ID 810696	Add to Cart Download
wmf_ages_bottleIDs_GA03.mat (279.73 KB)	MATLAB Data (.mat)	Water-mass fractions (wmf) are organized into 668x8 matrices: There are 668 bottle locations along section GA03 and the columns are the fraction of water last ventilated in one of 8 surface regions. This file contains the single matlab structure GA03, which has the following double-precision fields: field name size precision units --------------------------------------------------------- wmf_tau_all_yr [668×8 double] fraction of unity wmf_tau_all_yr_uncert [668×8 double] fraction of unity wmf_tau_le160yr [668×8 double] fraction of unity wmf_tau_le160yr_uncert [668×8 double] fraction of unity wmf_tau_le39yr [668×8 double] fraction of unity wmf_tau_le39yr_uncert [668×8 double] fraction of unity age_regional [668×7 double] years age_regional_uncert [668×7 double] years ideal_mean_age [668×1 double] years ideal_mean_age_uncert [668×1 double] years depth [668×1 double] m lat [668×1 double] degrees north lon [668×1 double] degrees east dist_east [668×1 double] km	Add to Cart Download

Supplemental File(s)	Type	Description	Action
GA03_transit-time_partitioned_water-mass_fractions_v2_README.pdf (328.76 KB)	Portable Document Format (.pdf)	README file for GA03 transit-time partitioned water-mass fractions datasets contributed by William M. Smethie Jr.	Add to Cart Download

File(s)	Type	Description	Action
wmf_tau_all_yrs.csv (162.60 KB)	Comma Separated Values (.csv)	Primary data file for dataset ID 810696	Add to Cart Download
wmf_ages_bottleIDs_GA03.mat (279.73 KB)	MATLAB Data (.mat)	Water-mass fractions (wmf) are organized into 668x8 matrices: There are 668 bottle locations along section GA03 and the columns are the fraction of water last ventilated in one of 8 surface regions. This file contains the single matlab structure GA03, which has the following double-precision fields: field name size precision units --------------------------------------------------------- wmf_tau_all_yr [668×8 double] fraction of unity wmf_tau_all_yr_uncert [668×8 double] fraction of unity wmf_tau_le160yr [668×8 double] fraction of unity wmf_tau_le160yr_uncert [668×8 double] fraction of unity wmf_tau_le39yr [668×8 double] fraction of unity wmf_tau_le39yr_uncert [668×8 double] fraction of unity age_regional [668×7 double] years age_regional_uncert [668×7 double] years ideal_mean_age [668×1 double] years ideal_mean_age_uncert [668×1 double] years depth [668×1 double] m lat [668×1 double] degrees north lon [668×1 double] degrees east dist_east [668×1 double] km	Add to Cart Download

Supplemental File(s)	Type	Description	Action
GA03_transit-time_partitioned_water-mass_fractions_v2_README.pdf (328.76 KB)	Portable Document Format (.pdf)	README file for GA03 transit-time partitioned water-mass fractions datasets contributed by William M. Smethie Jr.	Add to Cart Download

Dataset: 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

Principal Investigator: William M. Smethie Jr. (Lamont-Doherty Earth Observatory)

Co-Principal Investigator, Contact: Mark Holzer (University of New South Wales)

Co-Principal Investigator: Yu-Heng Ting (University of New South Wales)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)

Program: U.S. GEOTRACES (U.S. GEOTRACES)

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

Project: U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT CFC and SF6)

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

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 (DWBC Obs Line W)

Abstract

ERDDAP

Metadata

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Dataset: 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

Principal Investigator: William M. Smethie Jr. (Lamont-Doherty Earth Observatory)

Co-Principal Investigator, Contact: Mark Holzer (University of New South Wales)

Co-Principal Investigator: Yu-Heng Ting (University of New South Wales)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)

Program: U.S. GEOTRACES (U.S. GEOTRACES)

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

Project: U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT CFC and SF6)

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

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 (DWBC Obs Line W)

Abstract

ERDDAP

Metadata

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