This dataset consists of discrete samples and profile observations collected during the R/V S.A. Agulhas I National Centre for Polar and Ocean Research (NCPOR) cruise (EXPOCODE 91AA20171209) in the Indian Ocean from 2017-12-09 to 2018-02-04. These data include total alkalinity, pH on total scale, temperature, salinity, oxygen, nutrients and ammonia measurements. The NCAOR cruise is the part of the Southern Ocean Carbon and Climate Observations and Modeling project (SOCCOM) cruises and the Antarctic resupply cruise SOE2017-18 in South West Indian Ocean.

Surface Total Alkalinity fields were estimated from five regional TA relationships presented in Lee et al. 2006, using monthly mean sea surface temperature and salinity from the World Ocean Atlas 2001. The data file consists of 36 columns, including latitude, longitude, sea surface temperature (SST, Jan-Dec), sea surface salinity (SSS, Jan-Dec), calculated total alkalinity from January through December (TA, Jan-Dec).

This product is a result of the use of a decision tree-based advanced machine learning algorithm (XGB) combined with an ensemble approach to predict the surface total alkalinity (TA) of the North Indian Ocean (NIO) (Longitude: 50E-100E, Latitude: 0-26N) using ship-based observations collected from different sources for the period 1978-2019 and a reanalysis data product. The ensemble approach enables the development of the best high-resolution (1/12°) surface TA estimates (INCOIS_TA) with an uncertainty map. This data has a monthly frequency and ranges from 1993 to 2020.

This dataset includes discrete sample and profile data collected during the R/V Sarmiento de Gamboa cruise CAIBOX (EXPOCODE 29AH20090725) in the North Atlantic Ocean from 2009-07-25 to 2009-08-13. These data include total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, silicate, phosphate and nitrate. The instruments used to collect these data include Alkalinity titrator, CTD, Niskin bottles and spectrophotometer. These data were collected by AÃda F. RÃos, Fiz F. Pérez, and Miguel Gilcoto of Institute of Marine Research Vigo (IIM) as part of the CLIVAR_CAIBOX_2009 dataset. The International CLIVAR Global Ocean Carbon and Repeat Hydrography Program carries out a systematic and global re-occupation of select WOCE/JGOFS hydrographic sections to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2), and related parameters.

This dataset includes discrete measurements and profile observations of total alkalinity, pH on total scale, temperature, salinity, dissolved oxygen and nutrients during the R/V Nathaniel B. Palmer the Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) project, NBP1701, HazMat cruise (EXPOCODE 320620161224) in the Southern Ocean from 2016-12-24 to 2017-01-20. SOCCOM project is a large scale National Science Foundation funded research project based at Princeton University that started in September 2014. The project aims to increase the understanding of the Southern Ocean and the role it plays in factors such as climate, as well as educate new scientists with oceanic observation.

This dataset includes profile discrete measurements of total alkalinity, pH (on total scale), temperature, salinity, oxygen, nutrients and POC obtained during the R/V S.A. Agulhas II SOCCOM cruise AGU027 (EXPOCODE 91AH20170907) in the South Atlantic Ocean from 2017-09-07 to 2017-10-11. The R/V Agulhas II cruise AGAU027 was the Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) biogeochemical profiling float deployments cruise.

This dataset includes discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, silicate, nitrate, phosphate, delta C13, and other measurements collected during the CCGS Amundsen GEOTRACES cruise ArcticNet1503 (EXPOCODE 18DL20150905) in the Arctic Ocean and Northwestern Passages from 2015-09-05 to 2015-10-01.

This dataset includes discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, silicate, nitrate, phosphate, delta C13, and other measurements collected during the CCGS Amundsen GEOTRACES cruise ArcticNet1502 (EXPOCODE 18DL20150710) in the North Atlantic Ocean, Labrador Sea, Davis Strait, Baffin Bay from 2015-07-10 to 2015-08-20.

This dataset includes discrete sample and profile data collected during the R/V Sarmiento de Gamboa CLIVAR Repeat Section A05_2011 cruise 24N_Malaspina_2011 (EXPOCODE 29AH20110128) in the North Atlantic Ocean from 2011-01-28 to 2011-03-14. This dataset is U.S. State Department MSR U2011-006 as part of the World Data Service for Oceanography. These data include total alkalinity, (TA), pH on the total scale, water temperature, salinity, dissolved oxygen and nutrients. The instruments used to collect these data include Alkalinity titrator, CTD, Niskin bottles and spectrophotometer. These data were collected by AÃda F. RÃos and Fiz F. Pérez of Institute of Marine Research Vigo (IIM) and Alonso Hernández-Guerra of Universidad de Las Palmas de Gran Canaria (ULPGC) as part of the CLIVAR_A05_29AH20110128 dataset. The International CLIVAR Global Ocean Carbon and Repeat Hydrography Program carries out a systematic and global re-occupation of select WOCE/JGOFS hydrographic sections to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2), and related parameters.