Ocean Carbon and Acidification Data System (OCADS)

Subsurface/Bottle Data

Data Sources

• World Ocean Circulation Experiment (WOCE)
• Climate Variability and Predictability Experiment (CLIVAR)/GO-SHIP Repeat Hydrography Program
• Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project Cruises

Synthesis Products

• Global Ocean Data Analysis Project (GLODAP)v2.2022
• GLODAPv2.2021
• GLODAPv2.2020
• GLODAPv2.2019
• GLODAPv2
• GLODAP
• CARbon dioxide IN the Atlantic Ocean(CARINA)
• PACIFic ocean Interior CArbon (PACIFICA)
   

Data Sources

• Ships of Opportunity Program (SOOP)

Synthesis Products

• Surface Ocean Carbon Atlas (SOCAT)
• Global Surface pCO2 (LDEO) Database

• Mooring Data Viewer
• Global Time-Series and Moorings Project
• Autonomous Surface Vehicles (ASV)

Data Sources

• U.S. East Coast, U.S. West Coast, and coastal Europe

Synthesis Product

• Coastal Ocean Data Analysis Product in North America (CODAP-NA)
  • Cruise list
  • Data product
  • Paper

• Global Surface Ocean Acidification Indicators from 1750 to 2100
• North American Coastal Ocean Acidification Indicators from Surface to 500 meters

• OAP Funded Datasets by Project
• Numerical Data Packages, and other publications and tools
• OA Data From Our Partners

• OA metadata template (Version 2.0)
• OA metadata template (Version 1.0) Jiang et al., 2015

Expedition codes (EXPOCODEs) uniquely identify specific voyages. These codes are composed of the four-character ship code assigned by  of the International Council for the Exploration of the Sea (ICES) and the date of departure from port (Coordinated Universal Time, or UTC) using ISO-8601 format (YYYYMMDD). For example, a research expedition onboard National Oceanic and Atmospheric Administration (NOAA) Ship Ronald H. Brown (ICES code: 33RO) leaving the port on August 27, 2015 (Coordinated Universal Time, or UTC) would have an EXPOCODE of 33RO20150827. It is critical for all laboratories participating in the same oceanographic expedition to share the same EXPOCODEso that . That way, all data from the cruise can be retrieved based on a single EXPOCODE.

Research Vessel Codes

• ICES
• NCEI

For in situ observational water chemistry data, please follow the below data templates as closely as possible. If there is no data in one column, please remove the column entirely, feel free to add additional columns as well.

Best practices for assessing trends of ocean acidification time series

The three sets of WOCE primary level quality control (QC) flags for Niskin bottles, discrete sampling, and sensor based measurements, respectively, are consolidated here into a single flagging scheme to avoid confusion (Jiang et al., 2022). This consolidated flagging scheme is recommended for all types of OA data that will be submitted to OCADS.

2nd_QC_tool 

Toolbox for Secondary Quality Control (2nd QC) on ocean chemistry and hydrographic data.
Languages: MATLAB. README FOR THE 2QC TOOLBOX Siv Lauvset 2020-04-27.

Download 2nd_QC_tool

GSW_Sys

This Excel program (GSW_Sys_v1.0.xlsm) uses the latest International Thermodynamic Equation of Seawater – 2010 (TEOS-10) equations to calculate depth (unit: meter) [or pressure (unit: dbar), depending on the input], Absolute Salinity (SA, unit: g/kg), Conservative Temperature (Θ, unit: degree Celsius), potential temperature (θ, unit: degree Celsius), and potential density anomaly (σθ, unit: kg m–3) from input of location (latitude and longitude), depth or pressure, practical salinity, and temperature. This tool can also be used to calculate apparent oxygen utilization (AOU) and percent oxygen from dissolved oxygen.

Download GSW_Sys

fCO2_Calc

A newly developed fCO2_Calc program is also presented to standardize the calculation of partial pressure of carbon dioxide (pCO2) and fugacity of carbon dioxide (fCO2) from molecular ratio (mole fraction) of carbon dioxide in dry air (xCO2) measurements.

Download fCO2_Calc

CO2SYS Tools

Oceanographers often use two of the traditionally measured seawater carbon dioxide (CO2) system parameters [namely, total dissolved inorganic carbon content (DIC), total alkalinity content (TA), pH, and carbon dioxide partial pressure (pCO2) or fugacity (fCO2)] to compute the complete carbonate system using a program such as CO2SYS

Recommended dissociation constants for carbonic acid, bisulfate (HSO4–), and hydrofluoric acid (HF), as well as the equations to calculate total borate are presented in Section “Recommended Dissociation Constants and Other Values for Carbon System Calculations” of the Supplementary Material of Jiang et al., 2022.

• A broad recommendation can be made to use the dissociation constants from Lueker et al. (2000) for carbonic acid at salinities for open ocean situations [SP: 19-43, and temperature (T): 2-35°C] and the dissociation constants from Waters et al. (2014) [refitted based on data compiled by Millero (2010)] for brackish-water situations [the range of validity of these constants was stated as SP: 1-50, T: 0-50°C].
• The boron-salinity (B/SP) ratio of Lee et al. (2010) is recommended over that of Uppström (1974), as it is based on more data and used an improved method of determination.
• For the dissociation constants of bisulfate (HSO4–), Dickson (1990) is recommended over Khoo et al. (1977). For the dissociation constants of hydrofluoric acid (HF), Perez and Fraga (1987) is recommended over Dickson and Riley (1979). However, the choices of HSO4– and HF parameterizations should have little effect on any calculated results unless one of the input or output parameters is pH on “free” scale.

Information on batches of seawater Certified Reference Materials (CRMs) can be accessed through Scripps Institution of Oceanography (SIO). This page is managed by Dr. Andrew Dickson's group. For questions about the CRMs, please reach out to [co2crms (at) ucsd.edu]

• Primary-level QC tool: AtlantOS
• Second-level QC tool: A Toolbox for secondary quality control on ocean chemistry and hydrographic data (NCEI Accession 0209357) by Siv Lauvset (University of Bergen and Bjerknes Centre for Climate Research) and Toste Tanhua (IFM-GEOMAR).
• QC tool for Oxygen, Nitrate, and pH from Profiling Floats:
  • Github
  • Paper

• Empirical Seawater Property Estimation Routines (ESPERs): https://github.com/BRCScienceProducts/ESPER.
  Citation: Carter, B. R., Bittig, H. C., Fassbender, A. J., Sharp, J. D., Takeshita, Y., Xu, Y. Y., Álvarez, M., Wanninkhof, R., Feely, R. A., & Barbero, L. (2021). New and updated global empirical seawater property estimation routines. Limnology and Oceanography: Methods, 19(12), 785–809. https://doi.org/10.1002/lom3.10461.
• CArbonate system and Nutrients concentration from hYdrological properties and Oxygen using a Neural-network (Canyon-B): https://github.com/HCBScienceProducts/CANYON-B. Citation: Bittig et al. (2018). An alternative to static climatologies: Robust estimation of open ocean CO2 variables and nutrient concentrations from T, S and O2 data using Bayesian neural networks. Front. Mar. Sci. 5:328. http://dx.doi.org/10.3389/fmars.2018.00328.

• The Catalogue of Life (COL)
• Integrated Taxonomic Information System (ITIS)
• World Register of Marine Species (WoRMS)
• Paleobiology Database (PBDB)

These documents are only applicable to NOAA Ocean Acidification Program (OAP) investigators.

• Form 100: OAP Data Management Agreement is required for all proposals submitted to NOAA Ocean Acidification Program (OAP).
• Form 200: Extension for Data Submission is needed, if you do not expect to meet the data submission deadline. The deadline to submit your data is two years after your project end date, or before a paper is published using these data, whichever is sooner.
• Form 300: Waiver to OAP Data management requirement is needed if you do not plan to send any data to NOAA/National Centers for Environmental Information (NCEI) through the Ocean Acidification Data Stewardship (OADS) Project.
• Form 400: Past performance in OAP Data management is needed, if any investigator on the proposal was funded by NOAA/Ocean Acidification Program (OAP) before.

August, 2022

The Global Ocean Data Analysis Project version 2.2022 (GLODAPv2.2022) database is now available via NCEI. See glodap.info for more information. 

Citation: Lauvset, Siv K.; Lange, Nico; Tanhua, Toste; Bittig, Henry C.; Olsen, Are; Kozyr, Alex; Alin, Simone R.; Álvarez, Marta; Azetsu-Scott, Kumiko; Barbero, Leticia; Becker, Susan; Brown, Peter J.; Carter, Brendan R.; Cotrim da Cunha, Leticia; Feely, Richard A.; Hoppema, Mario; Humphreys, Matthew P.; Ishii, Masao; Jeansson, Emil; Jiang, Li-Qing; Jones, Steve D.; Lo Monaco, Claire; Murata, Akihiko; Müller, Jens Daniel; Pérez, Fiz F.; Pfeil, Benjamin; Schirnick, Carsten; Steinfeldt, Reiner; Suzuki, Toru; Tilbrook, Bronte; Ulfsbo, Adam; Velo, Antón; Woosley, Ryan J.; Key, Robert M. (2022). Global Ocean Data Analysis Project version 2.2022 (GLODAPv2.2022) (NCEI Accession 0257247). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/1f4w-0t92.

About GLODAPv2.2022

The GLODAPv2.2022 data product is composed of data from 1085 scientific cruises covering the global ocean between 1972 and 2021. It includes full depth discrete bottle measurements of salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon (TCO2), total alkalinity (TAlk), CO2 fugacity (fCO2), pH, chlorofluorocarbons (CFC-11, CFC-12, CFC-113, and CCl4), SF6, and various isotopes and organic compounds. It was created by appending data from 96 cruises to GLODAPv2.2021 (Lauvset et al., 2021, NCEI Accession 0237935). The data for salinity, oxygen, nitrate, silicate, phosphate, TCO2, TAlk, pH, CFC-11, CFC-12, CFC-113, CCl4, and SF6 were subjected to primary and secondary quality control. Severe biases in these data have been corrected for, and outliers removed. 

The GLODAP group is putting the finishing touches on the manuscript and it will be submitted to EESD in the coming days.

June, 2022

The SOCATv2022 database is now available via NCEI. The ocean absorbs a quarter of the global CO2 (carbon dioxide) emissions from human activity. The community-led Surface Ocean CO2 Atlas(SOCAT) is a key tool for quantifying ocean CO2 uptake and its variation. SOCAT version 2022 has quality-controlled in situ surface ocean fCO2 (fugacity of CO2) measurements made on ships, moorings, autonomous and drifting surface platforms for the global ocean and coastal seas from 1957 to 2021. 

The main SOCAT synthesis and gridded products contain 33.7 million fCO2 values with an estimated accuracy of < 5 μatm. An additional 6.4 million fCO2 sensor data with an accuracy of 5–10 μatm are separately available. SOCAT is used to quantify ocean CO2 uptake and ocean

April, 2022

A new data management project called Ocean Carbon and Acidification Data System (OCADS) was established at NCEI, after merging the former Ocean Acidification Data Stewardship (OADS, founded in 2012) and Ocean Carbon Data System (OCADS, founded in 2017) projects. The merger was driven by feedback from the OA research community, citing difficulties of discerning the differences of the former OADS and OCADS projects, when it comes to data submission and data access purposes. None of the previously published data sets will be affected by this merger. The new OCADS project manages all major types of OA data and welcomes data submissions from around the world. If you have any comments on the new OCADS website, would you please follow this link to share them with us? Many thanks!

March, 2022

OCADS team member Li-Qing Jiang was awarded a new proposal titled Temporal changes of ocean acidification indicators in the U.S. Large Marine Ecosystems (LMEs) - an operational data product at NOAA/NCEI in support of NOAA’s National Marine Ecosystem Status effort by NOAA's Ocean Acidification Program (OAP). His co-investigators include: Tim Boyer (NCEI, Federal lead), Dr. Brendan Carter (University of Washington), Dr. Jonathan Sharp (University of Washington), and Dr. Paige Lavin (University of Maryland). The goal of this proposal is to develop an operational OA data product to show the temporal changes of OA indicators in the U.S. Large Marine Ecosystems (LMEs).

February, 2022

Congratulations to OCADS team member Alex Kozyr for winning the 2021 NOAA OAR Outstanding Papers Award as a co-author of the recent Science paper on the oceanic sink of anthropogenic CO2.

Citation: Gruber, N., D. Clement, B. R. Carter, R. A. Feely, S. Van Heuven, M. Hoppema, M. Ishii, R. M Key, A. Kozyr, S. K. Lauvset, C. L. Monaco, Mathis, J. T., A. Murata, A. Olsen, F. F. Perez, C. L. Sabine, T. Tanhua, and R. Wanninkhof (2019), The oceanic sink for anthropogenic CO2 from 1994 to 2007. Science 363: 1193-1199, doi: 10.1126/science.aau5153.

January, 2022

A best practice data standard for discrete chemical oceanographic observations was developed by an international effort led by OCADS team member Li-Qing Jiang. The produced data standard was published in Frontiers in Marine Science (Press releases: NCEI, UMD).

• The new standard covers Column header abbreviations, consolidated quality control (QC) flags, and missing value indicators (i.e., -999 or NaN). The column header abbreviation standards presented here are an update and refinement of the Exchange format of the World Ocean Circulation Experiment (WOCE) Hydrographic Program (Joyce and Corry, 1994; Swift and Diggs, 2008).
• A newly developed Excel program (GSW_Sys_v1.0.xlsm) using the latest International Thermodynamic Equation of Seawater – 2010 (TEOS-10) equations to calculate depth (unit: meter) [or pressure (unit: dbar), depending on the input], Absolute Salinity (SA, unit: g/kg), Conservative Temperature (Θ, unit: degree Celsius), potential temperature (θ, unit: degree Celsius), and potential density anomaly (σθ, unit: kg m–3) from input of location (latitude and longitude), depth or pressure, practical salinity, and temperature is presented in this paper. This tool can also be used to calculate apparent oxygen utilization (AOU) and percent oxygen from dissolved oxygen.
• A newly developed fCO2_Calc program is also presented to standardize the calculation of partial pressure of carbon dioxide (pCO2) and fugacity of carbon dioxide (fCO2) from molecular ratio (mole fraction) of carbon dioxide in dry air (xCO2) measurements.
• Upgraded CO2SYS programs (available in Excel, MATLAB/GNU Octave, and Python) and the R package seacarb that accept [CO32–], as well as [HCO3–] (bicarbonate ion content), and [CO2*] (the sum of dissolved carbon dioxide [CO2(aq)] and carbonic acid content [H2CO3]) as input variables is also presented in this paper.
• Recommended dissociation constants for carbonic acid, bisulfate (HSO4–), and hydrofluoric acid (HF), as well as the equations to calculate total borate are presented in section “Recommended Dissociation Constants and Other Values for Carbon System Calculations” of the Supplementary Material of Jiang et al., 2022.

Citation: Jiang, L.-Q., D. Pierrot, R. Wanninkhof, R. A. Feely, B. Tilbrook, S. Alin, L. Barbero, R. H. Byrne, B. R. Carter, A. G. Dickson, J.-P. Gattuso, D. Greeley, M. Hoppema, M. P. Humphreys, J. Karstensen, N. Lange, S. K. Lauvset, E. R. Lewis, A. Olsen, F. F. Perez, C. Sabine, J. D. Sharp, T. Tanhua, T. W. Trull, A. Velo, A. J. Allegra, P. Barker, E. Burger, W.-J. Cai, C.-T. A. Chen, J. Cross, H. Garcia, J. M. Hernandez-Ayon, X. Hu, A. Kozyr, C. Langdon, K. Lee, J. Salisbury, Z. A. Wang, and L. Xue (2022), Best Practice Data Standards for Discrete Chemical Oceanographic Observations. Frontiers in Marine Science 8: 705638, https://doi.org/10.3389/fmars.2021.705638.

June, 2021

A new coastal OA data product called Coastal Ocean Data Analysis Product in North America (CODAP-NA) was published in the journal of Earth System Science Data (press release). CODAP-NA is similar to GLODAPv2 but for the coastal ocean. In this collaborative effort, OCADS team member Li-Qing Jiang coordinated with investigators from NOAA laboratories, including PMEL, AOML, and NEFSC, as well as 10 academic institutions to compile, quality-controlled, and synthesized 2 decades (2003-2018) of discrete measurements of inorganic carbon system parameters, oxygen, and nutrient chemistry data from the North American ocean margins. This version (v2021) of the CODAP-NA comprises 3391 oceanographic profiles from 61 research cruises.

• List of cruises
• Data product at NCEI's archive

Citation: Jiang, L.-Q., R. A. Feely, R. Wanninkhof, D. Greeley, L. Barbero, S. Alin, B. R. Carter, D. Pierrot, C. Featherstone, J. Hooper, C. Melrose, N. Monacci, J. Sharp, S. Shellito, Y.-Y. Xu, A. Kozyr, R. H. Byrne, W.-J., Cai, J. Cross, G. C. Johnson, B. Hales, C. Langdon, J. Mathis, J. Salisbury, and D. Townsend (2021), Coastal Ocean Data Analysis Product in North America (CODAP-NA) – An internally consistent data product for discrete inorganic carbon, oxygen, and nutrients on the U.S. North American ocean margins. Earth System Science Data, 13, 2777–2799, https://doi.org/10.5194/essd-13-2777-2021.

July, 2021

A compiled data product of discrete biogeochemical measurements from 35 individual cruise data sets in the southern Salish Sea and northern California Current System was published at NCEI (product, data).

[Jun. 2021]: Version 2021 of the Surface Ocean CO2 Atlas (SOCAT.v2021) data product was published at NCEI. The Surface Ocean CO2 Atlas (SOCAT) is a synthesis activity for quality-controlled, surface ocean fCO2 (fugacity of carbon dioxide) observations by the international marine carbon research community.

• Data product at NCEI's archive
• SOCAT project website

Citation: Bakker, D. C. E., Pfeil, B., Landa, C. S., Metzl, N., O'Brien, K. M., Olsen, A., Smith, K., Cosca, C., Harasawa, S., Jones, S. D., Nakaoka, S., Nojiri, Y., Schuster, U., Steinhoff, T., Sweeney, C., Takahashi, T., Tilbrook, B., Wada, C., Wanninkhof, R., Alin, S. R., Balestrini, C. F., Barbero, L., Bates, N. R., Bianchi, A. A., Bonou, F., Boutin, J., Bozec, Y., Burger, E. F., Cai, W.-J., Castle, R. D., Chen, L., Chierici, M., Currie, K., Evans, W., Featherstone, C., Feely, R. A., Fransson, A., Goyet, C., Greenwood, N., Gregor, L., Hankin, S., Hardman-Mountford, N. J., Harlay, J., Hauck, J., Hoppema, M., Humphreys, M. P., Hunt, C. W., Huss, B., Ibánhez, J. S. P., Johannessen, T., Keeling, R., Kitidis, V., Körtzinger, A., Kozyr, A., Krasakopoulou, E., Kuwata, A., Landschützer, P., Lauvset, S. K., Lefèvre, N., Lo Monaco, C., Manke, A., Mathis, J. T., Merlivat, L., Millero, F. J., Monteiro, P. M. S., Munro, D. R., Murata, A., Newberger, T., Omar, A. M., Ono, T., Paterson, K., Pearce, D., Pierrot, D., Robbins, L. L., Saito, S., Salisbury, J., Schlitzer, R., Schneider, B., Schweitzer, R., Sieger, R., Skjelvan, I., Sullivan, K. F., Sutherland, S. C., Sutton, A. J., Tadokoro, K., Telszewski, M., Tuma, M., van Heuven, S. M. A. C., Vandemark, D., Ward, B., Watson, A. J., and Xu, S. (2016), A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT). Earth System Science Data, 8, 383–413, https://doi.org/10.5194/essd-8-383-2016.

August, 2021

A new online data submission system called Scientific Data Information System (SDIS) has become operational, thanks to the development efforts by NOAA's Pacific Marine Environmental Laboratory (PMEL) (video tutorial, documentation). SDIS is the newly recommended way of submitting data to OCADS.

November, 2021

Warmest welcome to Errol Ronje for joining the OCADS team. Errol has a background in marine mammal research and was hired as a federal employee to work on the archiving of biological OA data. With Errol's hiring, OCADS is now opening its data management services to all OA investigators from the international community.

October, 2020

An upgraded version of the OCADS data portal was released. One of its major improvements over the old portal is its enhanced spatial constraint capabilities. The new portal allows users to conduct their spatial constraints based on the actual station information, instead of its bounding box info for discrete bottle based data. This significantly improves the accuracy of the spatial constraint.

May, 2019

OCADS team member Li-Qing Jiang was awarded a new proposal titled Synthesis and visualization of carbonate and nutrient data on North America's ocean margins by NOAA's Ocean Acidification Program (OAP). His co-investigators include: Dr. Richard A. Feely (PMEL), Dr. Rik Wanninkhof (PMEL), Dr. Simone Alin (PMEL) and Dr. Leticia Barbero (AOML). The goal of this proposal is to develop a first-ever discrete bottle based coastal OA data product that will cover both the surface and the subsurface coastal ocean.

December, 2019

A global OA indicator study led by OCADS team member Li-Qing Jiang with the title of Surface ocean pH and buffer capacity: past, present and future was published in Nature Scientific Reports (press releases: NCEI, UMD). By linking modeled carbon system trends with observed modern pH distribution, this hybrid data product benefits from recent improvements in both model design and observational data coverage, thus providing improved regional OA trajectories than the model output could alone, therefore, will help guide the regional OA adaptation strategies.

• Data product at NCEI
• Paper in Nature Scientific Reports

Citation: Jiang, L.-Q., B. Carter, R. A. Feely, S. Lauvset, and A. Olsen (2019), Surface ocean pH and buffer capacity: past, present and future. Nature Scientific Reports, 9, 18624, https://doi.org/10.1038/s41598-019-55039-4.

January, 2014

A new data management project called Ocean Carbon Data System (OCADS) was established at NCEI. As a sister project of OADS, the OCADS project serves as a continuation of the Carbon Dioxide Information Analysis Center (CDIAC-Oceans, defunded by September 30, 2017). OCADS leverages the same data management infrastructure as OADS, and provides data management services for ocean carbon data (along with isotope and tracder gas, etc.) to the international oceanographic community for free. The OCADS project has now been merged with the Ocean Acidification Data Stewardship (OADS) project to form the new Ocean Carbon and Acidification Data System (OCADS).

February, 2014

As a pioneer of ocean carbon data management, Alex Kozyr joined NOAA/NCEI as an affiliate staff to work in the newly established Ocean Carbon Data System (OCADS) project. Before joining NOAA, Alex was working at the Carbon Dioxide Information Analysis Center (CDIAC, Oak Ridge, Tennessee). Alex brought over two decades of data management experiences to NOAA. In addition to archiving, Alex also provides data management support for the Global Data Analysis Product Version 2 (GLODAPv2), and the Surface Ocean CO2 Atlas (SOCAT) projects.

January, 2014

A new Rich Metadata Management System (RMMS) was developed to display the collected "rich" metadata information in a user-friendly format. The RMMS has three components: (a) an Excel based submission form to collect the "rich" metadata information, (b) an XML template to store the collected information, and (c) an HTML display format to pull the information out of the XML files and display them in a user-friendly format. The list of metadata elements displayed and how they are organized are entirely driven by the OA research community. Here is an example of a data set that is managed using the RMMS. The RMMS is one of the main channels to ensure the OA datasets we manage here at NCEI are documented in a way that best serves the needs of the research community. If you have any comments to improve our display format, please don't hesitate to send a message to [noaa.ocads (at) noaa.gov].

June, 2014

A new “rich” ocean acidification metadata template was developed in an effort led by OCADS team member Li-Qing Jiang with a bottom-up approach by listening to the needs of the OA research community (paper, L&O e-Lecture, poster).

The new metadata template relies on a unique design called variable metadata section with all child metadata elements of a specific variable grouped together around that variable to allow for the rich metadata documentation of all oceanographic variables. It also introduced many new metadata elements, including:

• The use of observation type to indicate how an OA variable was observed, e.g., laboratory experiment, or surface underway, etc.
• The use of Insitu/manipulation/response to indicate whether an oceanographic property was reported at in-situ condition, or was artificially manipulated, or was a response variable under a laboratory experiment setup.
• The use of measured or calculate to indicate whether a reported oceanographic property was directly measured, or calculated from other parameters using programs like the CO2SYS.
• the use of Biological subject to indicate a marine organism name.
• The use of Species Identification ID for standardized documentation of a species.
• The use of Life stage of the biological subject to indicate its growth stage (larvae, juvenile, or adult).

Although this new template was developed with the goal of documenting laboratory experiment based OA data, it was extended to become a universal OA metadata template that is capable of serving all types of OA data to reduce the cost and improve the efficiency of OA data management. As the heart and soul of the OCADS data management, this template is the foundation of all OCADS components, i.e., the SDIS submission system, the OCADS rich metadata management system, and the OCADS data portal.

L-QJ is grateful to all the scientists, especially the many biological OA experts who contributed their comments to this metadata template development. Some metadata elements of the ocean carbon parameters, especially those of partial pressure of carbon dioxide (pCO2) benefited from a previous template as used by the Carbon Dioxide Information Analysis Center (CIDAC-Oceans).
Citation: Jiang, L.-Q., S. A. O'Connor, K. M. Arzayus, and A. R. Parsons (2015), A metadata template for ocean acidification data, Earth System Science Data, 7, 117-125, doi:10.5194/essd-7-117-2015.

September, 2014

A global OA indicator study led by OCADS team member Li-Qing Jiang with the title of Climatological distribution of aragonite saturation state in the global oceans was published in the journal of Global Biogeochemical Cycles (press releases: NOAA, AGU).

• Data product in NCEI
• Paper published in GBC

Citation: Jiang, L.-Q., R. A. Feely, B. Carter, D. J. Greeley, D. K. Gledhill, and K. M. Arzayus (2015), Climatological distribution of aragonite saturation state in the global oceans. Global Biogeochemical Cycles 29, 1656-1673, doi:10.1002/2015GB005198.

May, 2014

A new user-friendly data discovery and access interface called OA portal was released. It relies on technologies such as auto-complete, drop down menus, etc. to enable users to search for OA datasets at NCEI's archive based on their observed properties, observation types, observation dates, and other information in a easy-to-user GUI interface. Before the OA Portal was established, it would require a user to have the knowledge of writing complex search syntaxes in order to conduct searches based on multiple keywords. The OA portal has been decommissioned and replaced with an upgraded portal called OCADS Data Portal.

October, 2012

The Ocean Acidification Data Stwardship (OADS) project was established thanks to the funding from the NOAA Ocean Acidification Program (OAP). The overarching goal of the OADS project is to safeguard all OA data generated with funding from OAP and help OAP investigators meet their NOAA data management requirements. Additionally, OADS will serve the ocean acidification (OA) community by providing dedicated and online data discovery, access to NODC-hosted and distributed authoritative data sources, long-term archival, coordinated data flow, and scientific stewardship for a diverse range of OA and other chemical, physical, and biological oceanographic data. As of April 2022, the OADS project has been replaced with the new Ocean Carbon and Acidification Data System (OCADS).