Water Chemistry and Shallow Water Conductivity-Temperature-Depth (CTD) Profiles for select locations across Batangas, Philippines from 2012 to 2015

The water chemistry data described here are from discrete water samples collected by the NOAA Coral Reef Ecosystem Program (CREP), to assess the seawater carbonate systems at fixed climate survey sites located in coral reef habitats in the Philippines in 2012, 2013, and 2015. Climate sites were established by CREP to assess multiple features of the coral reef environment (in addition to the data described herein) over time. In 2015, conductivity-temperature-depth (CTD) casts were also performed to characterize the spatial structure of the physical and chemical properties of the ocean environment influencing the living coral reef resources.   These water chemistry and CTD data provide a baseline for tracking reef carbonate system changes due to globally increasing levels of atmospheric carbon dioxide. The data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive.

To survey water chemistry, SCUBA divers collected two discrete water samples from each site; one at the reef and one at the surface directly above the reef. The samples were processed by CREP and sent to NOAA Pacific Marine Environmental Laboratory (PMEL) to be analyzed for total alkalinity (TA) and dissolved inorganic carbon (DIC). From these constituents, alongside temperature, salinity, and depth data, other parameters of the seawater carbonate system can be calculated. 

CTD data are collected by lowering the CTD in a profiling mode from a small boat, resulting in vertical profiles (max 18 meter depth, downcast only) of water column conductivity, temperature, and pressure. Vertical profiles of temperature, salinity, and turbidity resulting from CTD casts provide indicators for local seawater chemistry changes. 

In addition to these discrete samples, water samples were collected as part of CREP's ocean acidification diurnal suite, which also includes vertical profiles from CTD casts, current direction and magnitude from an Acoustic Doppler Current Profiler, and pH from an SeaFET sensor. The data associated with the diurnal suite are documented and archived separately;  The data associated with the diurnal suite is documented and archived separately with metadata available at https://www.fisheries.noaa.gov/inport/item/45954.

Tags: 483, alkalinity, aquatic habitat, arthur's reef, arthur's rock (13n120e0002), balayan bay, baseline data from climate stations in batangas, baseline studies, batalang bato, batangas, batong buhay, biodiversity and fisheries in the coral triangle: embracing the e in ecosystem approaches to fisheri, biosphere, carbon dioxide, carbonate chemistry, chemistry monitoring and assessment, climate, climate change, coastal processes, conductivity, coral reef conservation program, coral reef ecosystem division, coral reef ecosystem program, coral reef studies, coral reefs, coral triangle, coral triangle initiative, corals, country/territory, cred, crep, ct, ctd, density, depth - sensor, dissolved gases, dissolved inorganic carbon (dic), dissolved oxygen, doc/noaa/nmfs/pifsc, earth science, ecosystem sciences division, esd, in situ, in situ physical, inorganic carbon, koala reserve area, mabini (13n120e0032), maricaban island, national marine fisheries service, nmfs, noaa, nodc ocean acidification scientific data stewardship, numeric data sets, nw pacific (limit-180), ocean acidification, ocean basin, ocean chemistry, ocean optics, ocean pressure, ocean temperature, oceanography, oceans, oxygen, pacific islands fisheries science center, pacific ocean, ph, philippines, philippines from 2012 to 2015, physical, pifsc, pressure - water [hydrostatic pressure], profile, reef habitat, reef monitoring and assessment, salinity, salinity/density, sea level pressure, sigma-t, small boat, south china sea, thermocline, tingloy (13n120e0009), total alkalinity (ta), turbidity, twin rocks, twin rocks sanctuary (13n120e0005), u.s. department of commerce, united states agency for international development, us doc, usaid, verde island passage, water chemistry, water density, water quality, water temperature, zoology
Organization: National Oceanic and Atmospheric Administration, Department of Commerce