TERMS OF USE AND CITATION

GLODAPv2 data are freely available, but appropriate credits to GLODAPv2 team and data originators 
must be given in any publications that emerge from their use.

GLODAPv2 is described in two publications in Earth System Science Data (Olsen et al., 2016 and 
Lauvset et al., 2016) and in one NDP document (Key et al., 2015). The NDP is a brief summary 
of the two ESSD papers. Full citations are provided below. 

Whenever GLODAPv2 is used, the following citations must be included: 

For data and data product: Olsen et al., 2016 and Key et al., 2015

For mapped product: Lauvset et al., 2016 and Key et al., 2015

Citing the Earth System Science Data publications is essential as this gives the team traceable 
citations and also enables tracking of GLODAPv2 use. This is important for justifying and sustaining 
the effort. 

Citations:
Olsen, A., R. M. Key, S. van Heuven, S. K. Lauvset, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, 
M. Hoppema, S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishii, F. F. Pérez and T. Suzuki. The Global 
Ocean Data Analysis Project version 2 (GLODAPv2) - an internally consistent data product for the world 
ocean, Earth System Science Data, 8, 297-323, 2016. doi: 10.5194/essd-8-297-2016  

Lauvset, S. K, R. M. Key, A. Olsen, S. van Heuven, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, 
M. Hoppema, S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishii, F. F. Pérez, T. Suzuki and S. Watelet. 
A new global interior ocean mapped climatology: the 1°x1° GLODAP version 2, Earth System Science Data, 8, 
325-340, 2016. doi:10.5194/essd-8-325-2016

Key, R.M., A. Olsen, S. van Heuven, S. K. Lauvset, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, 
M. Hoppema, S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishi, F. F. Perez, and T. Suzuki. 2015. Global 
Ocean Data Analysis Project, Version 2 (GLODAPv2), ORNL/CDIAC-162, NDP-P093. Carbon Dioxide Information 
Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. 
doi: 10.3334/CDIAC/OTG.NDP093_GLODAPv2


If you make heavy use of data from a single cruise or a limited set, please contact the PIs for possible 
collaboration. The PIs normally possess insight on context and data, and collaboration leading to co-authorships 
promotes further sharing of data.

BRIEF DESCRIPTION
Global Ocean Data Analysis Project version 2 or simply GLODAPv2 includes data from approximately one million 
individual seawater samples collected from almost 800 cruises carried during the years 1972-2013. Extensive 
quality control and subsequent calibration were carried out for salinity, oxygen, nutrient, carbon dioxide, 
total alkalinity, pH and chlorofluorocarbon data. Following calibration, the data were used to produce global 
climatology maps for many of the parameters. In addition to the data products and the mapped distributions, 
all of the original data files without alteration other than formatting and unification of units are made 
freely available along with whatever metadata was collected. An on-line cruise summary table provides data 
access and additional information including references to publications that have used data from specific 
cruises.


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WHENEVER GLODAPv2 DATABASE IS USED, PLEASE CITE THE RELEVANT ESSD PAPER: 
 
Olsen, A., R. M. Key, S. van Heuven, S. K. Lauvset, A. Velo, X. Lin, C. Schirnick, A. Kozyr, T. Tanhua, M. Hoppema, 
S. Jutterström, R. Steinfeldt, E. Jeansson, M. Ishii, F. F. Pérez and T. Suzuki. The Global Ocean Data Analysis Project 
version 2 (GLODAPv2) - an internally consistent data product for the world ocean, Earth System Science Data, 8, 297-323, 2016. 
doi: 10.5194/essd-8-297-2016    


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Parameters in the GLODAPv2 comma separated (csv) product files, their short names and units, in order of 
appearance. In the matlab product files that are also supplied, a “G2” has been added to every variable name.

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Parameter                           Units       Variable Name   Flag Name   Secondary QC Flag Name
——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————
Cruise number                                   cruise
Station                                         station
Cast                                            cast
Year                                            year
Month                                           month
Hour                                            hour
Minute                                          minute
Latitude                                        latitude
Longitude                                       longitude
Bottom depth                        m           bottomdepth 
Pressure of the deepest sample      dbar        maxsampdepth
Niskin bottle number                            bottle
Sampling pressure                   dbar        pressure
Sampling depth                      m           depth
Temperature                         ◦C          temperature
Potential temperature               ◦C          theta
Salinity                                        salinity        salinityf   salinityqc
Potential density                   kg m−3      sigma0
Potential density, ref 1000 dbar    kg m−3      sigma1
Potential density, ref 2000 dbar    kg m−3      sigma2
Potential density, ref 3000 dbar    kg m−3      sigma3
Potential density, ref 4000 dbar    kg m−3      sigma4
Neutral density                     kg m-3      gamma
Oxygen                              μmol kg−1   oxygen          oxygenf     oxygenqc
Apparent oxygen utilization         μmol kg−1   aou             aouf
Nitrate                             μmol kg−1   nitrate         nitratef    nitrateqc
Nitrite                             μmol kg−1   nitrite         nitritef
Silicate                            μmol kg−1   silicate        silicatef   silicateqc
Phosphate                           μmol kg−1   phosphate       phosphatef  phosphateqc
TCO2                                μmol kg−1   tco2            tco2f       tco2qc
TAlk                                μmol kg−1   talk            talkf       talkqc
pH at total scale, 25 ◦ C and zero dbar of pressure phts25p0    phts25p0f   phtsqc
pH at total scale, in situ temperature and pressure phtsinsitutp    phtsinsitutpf   phtsqc
CFC-11                              pmol kg−1   cfc11           cfc11f      cfc11qc
pCFC-11                             ppt         pcfc11
CFC-12                              pmol kg−1   cfc12           cfc12f      cfc12qc
pCFC-12                             ppt         pcfc12
CFC-113                             pmol kg−1   cfc113          cfc113f     cfc113qc
CCl4                                pmol kg−1   ccl4            ccl4f       ccl4qc
pCCl4                               ppt         pccl4
SF6                                 fmol kg−1   sf6             sf6f
pSF6                                ppt         psf6
δ13C                                ‰           c13             c13f
∆14C                                ‰           c14             c14f
∆14C counting error                 ‰           c14err
3H                                  TU          h3              h3f
3H counting error                   TU          h3err
δ3He                                %           he3             he3f
3He counting error                  %           he3err
He                                  nmol kg−1   he              hef
He counting error                   nmol kg−1   heerr
Ne                                  nmol kg−1   neon            neonf
Ne counting error                   nmol kg−1   neonerr
δ18O                                ‰           o18             o18f
Total organic carbon                μmol L-1    toc             tocf
Dissolved organic carbon            μmol kg−1   doc             docf
Dissolved organic nitrogen          μmol kg−1   don             donf
Total dissolved nitrogen            μmol kg−1   tdn             tdnf
Chlorophyll a                       ug L-1      chla            chlaf  
