Dataset: Wavelength- and temperature-dependent apparent quantum yields (AQYs) for the photochemical production of acrylate in seawater

Final no updates expectedDOI: 10.26008/1912/bco-dmo.892867.1Version 1 (2023-03-29)Dataset Type:Cruise Results

Principal Investigator: David J. Kieber (State University of New York College of Environmental Science and Forestry)

Student, Contact: Lei Xue (State University of New York College of Environmental Science and Forestry)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)


Program: United States Surface Ocean Lower Atmosphere Study (U.S. SOLAS)

Project: Photolysis and Photoproduction of Acrylate in Seawater and their Impact on the Marine Organosulfur Cycle (Impact Acrylate in Seawater)


Abstract

This dataset includes wavelength- and temperature-dependent apparent quantum yields (AQYs) for the photochemical production of acrylate in 0.2-micrometer (µm) filtered seawater samples collected from coastal Rhode Island (USA), the Sargasso Sea, and two sites in the Pacific Ocean off the island of Mo'orea (French Polynesia). These data were determined using (1) a monochromatic irradiation system and (2) a Shimadzu high-performance liquid chromatography system with a UV-Vis absorbance detector. ...

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Sample collection: The Sargasso Sea and coastal Rhode Island (USA) samples were collected from 30-liter Niskin bottles secured to a CTD rosette. Samples were collected during the EN589 cruise aboard the R/V Endeavor from September 16 to October 15, 2016. Dr. David Kieber was the chief scientist for this cruise. Rolling Deck to Repository (R2R) data for EN589 can be found at http://www.rvdata.us/catalog/EN589

Samples from a Mo'orea coral reef and Pacific Ocean station (located ~2 kilometers beyond the coral reef) were collected in 2-liter opaque high-density polypropylene bottles aboard a small research boat moored at the Gump Research station. Sampling was between April 6 and April 24, 2018. Details regarding sampling should be directed to Dr. David Kieber.

Sample storage: Seawater samples from the surface were collected in 30-liter (L) Niskin bottles attached to a CTD rosette during the 2016 R/V Endeavor (EN589) Atlantic cruise or in pre-cleaned opaque polypropylene bottles by hand during the 2018 Mo'orea field trip. Following collection, water samples were gravity filtered through precleaned 0.2-micrometer (µm) pore-size POLYCAP 75 AS Nylon filters into precleaned 4 L Qorpak glass bottles. All Qorpak bottles were then filled with minimum headspace (ca. 5 milliliters (mL)), sealed tightly, and stored in the dark at 4 degrees Celsius until use for irradiation experiments.

Apparent quantum yield(AQY) method: A monochromatic irradiation system was used to determine wavelength- and temperature-dependent AQYs for the photochemical production of acrylate in 0.2 µm-filtered seawater at selected wavelengths from 290 to 400 nanometers (nm). See Zhu and Kieber (2018) for detailed setups. Briefly, for each AQY experiment, 25 mL of 0.2-μm filtered, air-saturated seawater was pipetted into a 5-centimeter (cm) pathlength, rectangular quartz cell and sealed with a Teflon-lined screw-top cap with no headspace. The filled quartz cell was placed in the sample chamber and the sample temperature inside the cell was controlled by a recirculating glycol-water bath. Parallel dark controls were obtained by blocking the incoming radiation. All irradiated samples and dark controls were continuously stirred during the experiment. For each water sample, triplicate irradiations were conducted at each wavelength, except for the duplicate irradiations at 360 nm. The photon flux in each AQY experiment was determined using nitrite actinometry (Jankowski et al. 1999) in a separate 5 cm quartz cell. The photon flux in the quartz cell was calculated using the procedure outlined in Kieber et al. (2007).


Related Datasets

IsRelatedTo

Dataset: Photochemical production rates of acrylate in seawater
Relationship Description: Samples used for the AQY study were used to model photochemical production rates of acrylate in seawater samples exposed to solar radiation at the sea surface.
Kieber, D. J. (2022) Photochemical production rates of acrylate in seawater following exposure to sunlight from a variety of marine environments between 2011-2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2022-03-22 doi:10.26008/1912/bco-dmo.871691.1

Related Publications

Results

Xue, L. (2020). Acrylate: The missing carbon in the marine organosulfur cycle. Ph.D. Dissertation, State University of New York, College of Environmental Science and Forestry. https://suny-esf-researchportal.esploro.exlibrisgroup.com/esploro/outputs/graduate/Acrylate-The-missing-carbon-in-the/99871049004826#file-0
Methods

Jankowski, J. J., Kieber, D. J., & Mopper, K. (1999). Nitrate and Nitrite Ultraviolet Actinometers. Photochemistry and Photobiology, 70(3), 319–328. https://doi.org/10.1111/j.1751-1097.1999.tb08143.x
Methods

Kieber, D. J., Toole, D. A., Jankowski, J. J., Kiene, R. P., Westby, G. R., del Valle, D. A., & Slezak, D. (2007). Chemical “light meters” for photochemical and photobiological studies. Aquatic Sciences, 69(3), 360–376. https://doi.org/10.1007/s00027-007-0895-0
Methods

Zhu, Y., & Kieber, D. J. (2018). Wavelength- and Temperature-Dependent Apparent Quantum Yields for Photochemical Production of Carbonyl Compounds in the North Pacific Ocean. Environmental Science & Technology, 52(4), 1929–1939. doi:10.1021/acs.est.7b05462