The physical and biogeochemical processes that control and maintain the hypoxic zone in the northern Gulf of Mexico are complex and their relative strengths are known to vary temporally and spatially at many scales. The MCH Project was funded by NOAA from 2003-2016 and consisted of an integrated observational and numerical modeling approach to better understand the interactions of the physical, biological, and geochemical processes and their variability across the entire Texas/Louisiana shelf.

This dataset contains surface discrete measurements of dissolved inorganic carbon, total alkalinity, water temperature, salinity and other variables collected from surface discrete observations using flow through pump, CTD, Niskin Bottles and other instruments during NOAA Ship Ronald H. Brown cruise RB10-07 (EXPOCODE 33RO20101014), in the Gulf of Mexico from 2010-10-14 to 2010-11-04. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry.

This dataset contains surface discrete measurements of dissolved inorganic carbon, total alkalinity, water temperature, salinity and other variables collected from surface discrete observations using flow through pump, CTD, Niskin Bottles and other instruments during the F.G. Walton Smith cruises WS1116 and WS1118 (EXPOCODEs 33WA20111020 and 33WA20111211), in the Gulf of Mexico and North Atlantic Ocean from 2011-10-20 to 2011-12-15. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry.

This dataset contains water temperature profiles from XBT casts collected aboard the HANSA FREYBURG, HIGHLAND CHIEF, ER MONTPELLIER, SEATRADE ORANGE, AURORA AUSTRALIS, L'Astrolabe, SEATRADE RED, and Szechuen in the Indian Ocean, South Pacific Ocean, Tasman Sea, Southern Ocean, and Coral Sea from 28 July 2019 to 14 July 2021. These data were collected as part of the Ship of Opportunity Program High Density XBT Transects during cruises HF32, HC30, MP30, SO30, AA190, LA200, SR30, LA210, SZ30, and SZ06.

This dataset contains water temperature, salinity, and others taken by CTD from NOAA Ship David Starr Jordan, NOAA Ship McArthur II, and others in the Northeast Pacific Ocean (limit-180) and TOGA Area - Pacific from 1996-07-22 to 2010-12-07. Data were collected using standard Sea-Bird SBE-9plus CTD, to 1000m or to 10m of bottom depth. Conductivity, temperature, pressure, and dissolved oxygen sensor calibrations were adjusted by Sea-Bird recommended procedures when possible. Details are in metadata documents.

This dataset contains profile discrete measurements of dissolved inorganic carbon, total alkalinity, pH on total scale, water temperature, salinity and other variables collected from profile discrete observations using flow through pump, CTD, Niskin Bottles and other instruments during the F.G. Walton Smith CIOERT2017 cruise WS17135 (EXPOCODE 33WA20170515), in the Gulf of Mexico, Caribbean Sea and North Atlantic Ocean from 2017-05-15 to 2017-06-13. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry.

This dataset contains profile discrete measurements of dissolved inorganic carbon, total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen and nutrients collected from profile discrete observations using flow through pump, CTD, Niskin Bottles and other instruments during the F.G. Walton Smith cruise WS18008 (EXPOCODE 33WA20180108), in the Gulf of Mexico from 2018-01-08 to 2018-01-12.

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This dataset contains profile discrete measurements of total alkalinity, water temperature, salinity and other variables collected from profile discrete observations using flow through pump, CTD, Niskin Bottles and other instruments during the NOAA Ship Gordon Gunter cruise GU0802 Leg2 (EXPOCODE 33GG20080512), in the Gulf of Mexico from 2008-05-12 to 2008-05-30. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry.

This dataset contains profile discrete measurements of dissolved inorganic carbon, total alkalinity, water temperature, salinity and nutrients collected from profile discrete observations using CTD, Niskin Bottles and other instruments during the NOAA Ship Nancy Foster cruise NF10-13 (EXPOCODE 33NF20100701), in the Gulf of Mexico from 2010-07-01 to 2010-07-18. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry.