The US GEOTRACES North Atlantic cruise aboard the R/V Knorr completed the section between Lisbon and Woods Hole that began in October 2010 but was rescheduled for November-December 2011. The R/V Knorr made a brief stop in Bermuda to exchange samples and personnel before continuing across the basin. Scientists disembarked in Praia, Cape Verde, on 11 December. The cruise was identified as KN204-01A (first part before Bermuda) and KN204-01B (after the Bermuda stop). However, the official deployment name for this cruise is KN204-01 and includes both part A and B.
Science activities included: ODF 30 liter rosette CTD casts, ODU Trace metal rosette CTD casts, McLane particulate pump casts, underway sampling with towed fish and sampling from the shipboard "uncontaminated" flow-through system.
Full depth stations are shown in the accompanying figure (see below). Additional stations to sample for selected trace metals to a depth of 1000 m are not shown. Standard stations are shown in red (as are the ports) and "super" stations, with extra casts to provide large-volume samples for selected parameters, are shown in green.
Station spacing is concentrated along the western margin to evaluate the transport of trace elements and isotopes by western boundary currents. Stations across the gyre will allow scientists to examine trace element supply by Saharan dust, while also contrasting trace element and isotope distributions in the oligotrophic gyre with conditions near biologically productive ocean margins, both in the west, to be sampled now, and within the eastern boundary upwelling system off Mauritania, sampled last year.
Funding: The cruise was funded by NSF OCE awards 0926204, 0926433 and 0926659.
Additional cruise information is available from the Rolling Deck to Repository (R2R): https://www.rvdata.us/search/cruise/KN204-01
Other Relevant Links:
ADCP data are available from the Currents ADCP group at the University of Hawaii at the links below:
KN204-01A (part 1 of 2011 cruise; Woods Hole, MA to Bermuda)
KN204-01B (part 2 of 2011 cruise; Bermuda to Cape Verde)
Dataset | Brief Description |
---|---|
GT11 - CTD and PUMP - Cast Events | CTD and PUMP - Cast Events |
GT11 - CTD - ODF/SIOR Bottle | CTD - ODF/SIOR Bottle |
GT11 - CTD - Bottle Sampling Comments | CTD - Bottle Sampling Comments (GTC and ODF/SIOR) |
GT11 - CTD - GT-C Cast Sheets | CTD - GT-C Cast Sheets (PDF files) |
GT11 - CTD - ODF/SIOR Cast Sheets | CTD - ODF/SIOR Cast Sheets (PDF files) |
GT11 - CTD - GT-C Sample Logs | CTD - GT-C Sample Logs (PDF files) |
GT11 - CTD - ODF/SIOR Sample Logs | CTD - ODF/SIOR Sample Logs (PDF files) |
GT11 - CTD - GT-C Bottle | CTD - GT-C Bottle |
GT10-11 - CFC and SF6 | Concentrations of CFC-11, CFC-12, CFC-113 and SF6 in seawater - GT11 |
GT11 - Cruise Report | GT11 - Cruise Report |
GT11 - Cruise Tracks | GT11 - Cruise tracks from Athena data - 1 minute fixes. |
GT11 - CTD - GT-C Profiles | CTD - GT-C Profiles (1 m downcasts) |
GT11 - CTD - ODF/SIOR Profiles | ODF/SIOR CTD Profiles (1 m downcasts) |
GT11 - CTD - PUMP Sample Logs | CTD - PUMP Sample Logs (.jpg files) |
GT11 - FIA-AlFeMn | Shipboard flow injection analyis (FIA) of dissolved Al, Fe, and Mn. |
GT10-11 - HeNe | Helium, Neon, and Helium-isotope concentrations from KN199-04 (GT10) and KN204-01 (GT11) cruises. |
GT10-11 - Tritium | Tritium concentration from KN199-04 (GT10) and KN204-01 (GT11) cruises. |
GT10-11 - dFe and dFe-II | Concentrations of dissolved iron and dissolved iron(II), U.S. GEOTRACES transects |
GT10-11 - GaBa_bottles | Dissolved Ga and Ba from GEOTRACES Rosette bottles from GT10 and GT11 cruises. |
GT10-11 - DIC_TA | Inorganic Carbon data from GT10 and GT11 North Atlantic cruises |
GT11 - As AP Surface Transects | Surface transects for arsenic speciation, antimony speciation, and alkaline phosphatase activity |
GT10-11 - GaBa_surface | Dissolved Ga and Ba from surface tows from GT10 and GT11 cruises. |
GT10-11 - Neodymium - USC | seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT) |
GT10-11 - Th234 Particulate | Particulate Thorium-234 from in situ pumps. |
GT10-11 - Th234_Total_and_U238 | Water-column total Thorium-234 and Uranium-238. |
GT11 - As Sb AP - Profiles | Depth profiles for arsenic and antimony speciation and alkaline phosphatase activity |
GT11 - Nanomolar Nutrients - Surface | Nanomolar concentrations of PO4, NO3, NO2 (surface) |
GT11 - Nanomolar Nutrients - Profiles | Nanomolar concentrations of PO4, NO3, NO2 (profile) |
GT10-11 - Dissolved Fe Zn Cd conc and isotopes | Dissolved Fe, Zn and Cd concentrations and isotope ratios |
GT10-11 - Particulate trace elements | Trace element concentrations in particles |
GT11 - Cruise Event Log | GT11 (KN204-01) scientific sampling event log. |
GT10-11 - Trace Element Profiles | Trace element profiles from GT-10 and GT-11 |
GT10-11 - Fe Speciation | Profiles of concentrations of dissolved iron-binding ligands and their respective conditional stability constants |
GT10-11 - Cu Speciation | Total dissolved copper and estimates of free Cu2+, ligand concentrations, and conditional stability constants |
GT10-11 - Ra Th | Radium and Thorium isotopes sampled by in situ pump on GT10 and GT11 cruises. |
GT10-11 - Dissolved and Particulate Th and Pa | Depth profiles of seawater dissolved and small and large particulate 232Th, 230Th, and 231Pa |
GT11 - Fe Soluble | Soluble Fe passed through 0.2 um Anopore filter, from GT11 cruise. |
GT10-11 - Pb Dissolved | Dissolved lead (Pb), less than 0.2 um, from GT10 and GT11 cruises. |
GT10-11 - Trace Element References | SAFe and GEOTRACES trace element references |
GT10-11 - Hg Aerosol | Concentration of atmospheric aerosol total mercury (Hg) from the 2010 and 2011 U.S. GEOTRACES cruises |
GT10-11 - Unfiltered Rainwater | Trace metal and major anion concentrations in unfiltered rainwater. |
GT10-11 - Hg Particulate | Particulate total mercury and monomethylmercury - US GEOTRACES NATZ |
GT10-11 - Hg Speciation | Mercury speciation across the US GEOTRACES North Atlantic Zonal Section |
GT10-11 - Fe Mn Zn Cd and Cu | Dissolved Iron, Manganese, Zinc, Cadmium and Copper concentrations |
GT10-11 - Filtered Rainwater | Trace metal concentrations in filtered rainwater. |
GT10-11 - Trace Metals Aerosol | Total aerosol trace metal concentrations. |
GT10-11 - Co Total Dissolved and Labile | Total dissolved Cobalt and labile Cobalt concentrations from KN199-04 and KN204-01. |
GT10-11 - Particulate Th and Pa | Depth profiles of seawater suspended dissolved and particulate 232Th, 230Th, and 231Pa |
GT10-11 - Particulate composition | Size-fractionated major and minor particle composition and concentration |
GT10-11 - delta_13C | delta 13C measurement of dissolved inorganic carbon (DIC) from GT10 and GT11 cruises. |
GT10-11 - delta 15N-NO3 | delta 15N of nitrate from GT10 and GT11 cruises. |
GT10-11 - Dissolved Po Pb | Dissolved 210Po and 210Pb from US GEOTRACES North Atlantic KN199-04 and KN204-01 |
GT10-11 - Particulate Po Pb | Particulate 210Po and 210Pb from US GEOTRACES North Atlantic KN199-04 and KN204-01 |
GT10-11 - Nitrate isotopes | Nitrogen and Oxygen isotope ratios of dissolved nitrate |
GT10-11 - Transmissometer GTC | NAZT particle beam attenuation coefficient (Cp) data from GT-C (GEOTRACES carousel) rosette system |
GT10-11 - Transmissometer ODF | NAZT particle beam attenuation coefficient (Cp) data from ODF (Ocean Data Facility) rosette system |
GT10-11 - N African Mineral Dust Composition | North African mineral dust composition from the 2010 and 2011 U.S. GEOTRACES cruises. |
GT10-11 - delta 30Si | Profiles of stable isotopes of silicon (Si) in silicic acid (Si(OH)4) from GT10 and GT11 cruises. |
GT10-11 - Particulate Fe Isotopes | Particulate Fe isotopes (d56Fe, labile d56Fe, labile[Fe], [Cd], [Ba], and [P]) from GT10 and GT11 cruises. |
GT10-11 - DI Water Soluble Aerosol Trace Elements | DI water soluble aerosol trace elements for the North Atlantic GEOTRACES cruises. |
GT10-11 - cellular element quotas | Element quotas of individual phytoplankton cells |
GT10-11 - Pb isotope ratios | Isotope ratios of Pb passing through a 0.2 um Acropak capsule filter from the GEOTRACES North Atlantic Transect. |
GT10-11 - REEs | Dissolved Rare Earth Element (REE) Concentrations in NAZT Section GA03 |
GT10-11 - Aerosol Carbon | Organic carbon and water soluble organic carbon atmospheric loadings from aerosol samples. |
GT10-11 - Aerosol FTICR MS | m/z and peak intensity data for the molecular formulas assigned to each aerosol water soluble organic matter sample run by ESI FTICR MS. |
GT10-11 - Aerosol 1H NMR | Spectral magnitude data for 0.0008 ppm bands from aerosol water soluble organic matter 1H NMR spectra. |
GT11 - Be-7 Aerosol | Beryllium-7 in aerosol |
GT10-11 - Thorium and Particle Cycling Inverse Model and parameter estimates | Thorium and Particle Cycling Inverse Model and parameter estimates |
Global Noble Gases | Noble gas and N2/Ar (with associated CTD) data from 93 different cruises spanning the globe |
GT10-11 - Neodymium - LDEO | seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT) |
GT10-11 - Neodymium - UH | seawater Nd isotopes and concentrations from the US-GEOTRACES North Atlantic zonal transect (NAZT) |
Water Mass Fractions - All Years | The fraction of water last ventilated in a given region regardless of the time elapsed since ventilation (in practice, younger than 4000 years). |
Water Mass Fractions - 160 yrs | The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago |
Water Mass Fractions - 39 yrs | The fraction of water last ventilated in a given region in a time less than or equal to 39 years ago |
Water Mass Fractions - Ages | Mean ventilation age reported for 7 regions of the Atlantic |
Chief Scientist: Edward A. Boyle
Massachusetts Institute of Technology
Co-Chief Scientist: Gregory A. Cutter
Old Dominion University
• GA03
• GT11
• KN204-01A
• KN204-01B
• USGT-NAT-2011
• USGNAZT
• GNAT
• 316N20111106
• KN204-1