A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Inter‐laboratory differences in the apparent quantum yield for the photochemical production of dissolved inorganic carbon in inland waters and implications for photochemical rate modeling (2022)

Koehler, B., Powers, L. C., Cory, R. M., Einarsdóttir, K., Gu, Y., Tranvik, L. J., Vähätalo, A. V., Ward, C. P., & Miller, W. L. (2022). Inter‐laboratory differences in the apparent quantum yield for the photochemical production of dissolved inorganic carbon in inland waters and implications for photochemical rate modeling. Limnology and Oceanography : Methods, 20(6), 320-337. https://doi.org/10.1002/lom3.10489

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Koehler, Birgit; Powers, Leanne C.; Cory, Rose M.; Einarsdóttir, Karólína; Gu, Yufei; Tranvik, Lars J.; Vähätalo, Anssi V.; Ward, Collin P.; Miller, William L.

Lehti tai sarja: Limnology and Oceanography : Methods

ISSN: 1541-5856

eISSN: 1541-5856

Julkaisuvuosi: 2022

Ilmestymispäivä: 06.04.2022

Volyymi: 20

Lehden numero: 6

Artikkelin sivunumerot: 320-337

Kustantaja: John Wiley & Sons

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1002/lom3.10489

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/80555

Tiivistelmä

Solar radiation initiates photochemical oxidation of dissolved organic carbon (DOC) to dissolved inorganic carbon (DIC) in inland waters, contributing to their carbon dioxide emissions to the atmosphere. Models can determine photochemical DIC production over large spatiotemporal scales and assess its role in aquatic C cycling. The apparent quantum yield (AQY) spectrum for photochemical DIC production, defined as mol DIC produced per mol chromophoric dissolved organic matter-absorbed photons, is a critical model parameter. In previous studies, the principle for the determination of AQY spectra is the same but methodological specifics differ, and the extent to which these differences influence AQY spectra and simulated aquatic DIC photoproduction is unclear. Here, four laboratories determined AQY spectra from water samples of eight inland waters that are situated in Alaska, Finland, and Sweden and span a nearly 10-fold range in DOM absorption coefficients. All AQY values fell within the range previously reported for inland waters. The inter-laboratory coefficient of variation (CV) for wavelength-integrated AQY spectra (300–450 nm) averaged 38% ± 3% SE, and the inter-water CV averaged 63% ± 1%. The inter-laboratory CV for simulated photochemical DIC production (conducted for the five Swedish lakes) averaged 49% ± 12%, and the inter-water CV averaged 77% ± 10%. This uncertainty is not surprising given the complexities and methodological choices involved in determining DIC AQY spectra and needs to be considered when applying photochemical rate modeling. Thus, we also highlight current methodological limitations and suggest future improvements for DIC AQY determination to reduce inter-laboratory uncertainty.

YSO-asiasanat: liuennut orgaaninen hiili; sisävedet; hapettuminen; epäorgaaniset yhdisteet; valokemia; ympäristökemia; mittaustekniikka

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2022

JUFO-taso: 1