CO2, Hydrographic, and Chemical Data Obtained During the R/V Meteor Cruise 18/1 in the North Atlantic Ocean, CDIAC/NDP056Entry ID: CDIAC_NDP056
Abstract: [Summary adopted from the NDP-056 documentation]
The North Atlantic Ocean is characterized by an intense meridional
circulation cell carrying near-surface waters of tropical and
subtropical origin northward and deep waters of arctic and subarctic
origin southward. The related "overturning" is driven by the sinking
of water ... masses at high latitudes. The overturning rate and thus the
intensity of the meridional transports of mass, heat, and salt, is an
important control parameter for the modeling of the ocean's role in
climate. Certainly such estimates require more than one survey of the
study area; therefore, the Research Vessel (R/V) Meteor Cruise 18/1
was one in a series of cruises in the North Atlantic that started in
March 1991 and continued until 1995.
This data documentation discusses the procedures and methods used to
measure total carbon dioxide (TCO2) and total alkalinity (TALK) at
hydrographic stations, as well as underway partial pressure of CO2
(pCO2) measured during the R/V Meteor Cruise 18/1 in the North
Atlantic Ocean (Section A1E). Conducted as part of the World Ocean
Circulation Experiment (WOCE) and the German North Atlantic
Overturning Rate Determination expedition, the cruise began in
Reykjavik, Iceland, on September 2, 1991, and ended after 24 days at
sea in Hamburg, Germany, on September 25. 1991. WOCE Zonal Section A1E
began at 60 N and 30(deg)30' W (southeast of Greenland) and continued
southeast with a closely spaced series of hydrocasts to 52(deg)20' N and
14(deg)15' W (Porcupine Shelves). Measurements made along WOCE Section
A1E included pressure, temperature, salinity, and oxygen measured by a
conductivity, temperature and depth (CTD) sensor; bottle salinity;
oxygen; phosphate; nitrate; nitrite; silicate; TCO2; TALK; and
underway pCO2. A total of 61 CTD casts were made, including 59 bottle
casts and 2 calibration stations. Replicate samples from seven Niskin
bottles at five stations were also collected for later shoree-based
reference analyses of TCO2 by vacuum extraction and manometry and TALK
in the laboratory of Dr. Charles D. Keeling, Scripps Institution of
Oceanography; these results are also included in this report.
TCO2 was measured by using an automated sample processsor, to extract
CO2 from seawater samples, coupled to a coulometer, to detect the
extracted gas. The precision and accuracy of the system was 11.60
umol/kg. Samples collected for TALK were measured using standard
potentiometric techniques; precision was 12.0 umol.kg. Underway pCO2
was measured by infrared photometry; precision was 12 uatm.
The R/V Meteor Cruise 18/1 data set is available freee of charge as a
numeric data package (NDP) from the Carbon Dioxide Information
Analysis Center. The NDP consists of three oceanographic data files,
three FORTRAN 77 data retrieval routine files, an readme file, and
this printed documentation, which describes the contents and format of
all files as well as the procedures and methods used to obtain the
For more information, see:
See also the U.S. Department of Energy (DOE) Global Survey of CO2 in
Data Set Citation
Dataset Originator/Creator: Johnson, K.M., B. Schneider, L. Mintrop, D.W.R. Wallace
Dataset Title: Carbon Dioxide, Hydrographic, and Chemical Data Obtained During R/V Meteor Cruise 18/1 in the North Atlantic Ocean
Dataset Series Name: NDP-056
Dataset Release Date: 1996
Dataset Release Place: Oak Ridge, TN
Dataset Publisher: Carbon Dioxide Information Analysis CenterOnline Resource: http://cdiac.esd.ornl.gov/oceans/ndp_056/ndp056.html
Start Date: 1991-03-01Stop Date: 1995-12-31
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
OCEANS > OCEAN CHEMISTRY > ALKALINITY > TOTAL ALKALINITY
OCEANS > OCEAN CHEMISTRY > BIOGEOCHEMICAL CYCLES
OCEANS > OCEAN CHEMISTRY > CARBON
OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE > PARTIAL CO2
OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE > TOTAL CO2
OCEANS > OCEAN CHEMISTRY > NITRATE
OCEANS > OCEAN CHEMISTRY > NITRITE
OCEANS > OCEAN CHEMISTRY > NUTRIENTS
OCEANS > OCEAN CHEMISTRY > OXYGEN
OCEANS > OCEAN CHEMISTRY > PHOSPHATE
OCEANS > OCEAN CHEMISTRY > RADIONUCLIDES
OCEANS > OCEAN CHEMISTRY > SILICATE
OCEANS > OCEAN CHEMISTRY > STABLE ISOTOPES
OCEANS > OCEAN CHEMISTRY > TRACE ELEMENTS
OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS
OCEANS > OCEAN CIRCULATION > OCEAN MIXED LAYER
OCEANS > OCEAN CIRCULATION > THERMOHALINE CIRCULATION
OCEANS > OCEAN PRESSURE > WATER PRESSURE
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > CONDUCTIVITY
OCEANS > SALINITY/DENSITY > DENSITY
OCEANS > SALINITY/DENSITY > SALINITY
OCEANS > SALINITY/DENSITY > SALT TRANSPORT
Quality An important part of the NDP process at the Carbon Dioxide Information
Analysis Center (CDIAC) involves the quality assurance (QA) of data
before distribution. Data received at CDIAC are rarely in a condition
that would permit immediate distribution, regardless of the source.
To guarantee data of the highest possible quality, ... CDIAC conducts
extensive QA reviews that involve examining the data for completeness,
reasonableness, and accuracy. Although they have common objectives,
these reviews are tailored to each data set, often requiring extensive
programming efforts. In short, the QA process is a critical component
in the value-added concept of supplying accurate, usable data.
Data Set Progress
Distribution Media: ftp
Distribution Size: 426KB
Brookhaven National Laboratory OASD Building 318
Province or State: NY
Postal Code: 11973
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov
Institut fur Meereskunde
Institut fur Ostseeforschung
Province or State: ROSTOCK-WARNEMUNDE
Phone: +49 431 600-4200
Fax: +49 431 600-174201
Email: dwallace at ifm.uni-kiel.de
Institute for Marine Sciences Dusternbrooker Weg 20
Postal Code: D-24105
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