A Pseudo-Lagrangian Transformation to Study a Chlorophyll-a Patch in the Ría de Vigo (NW Iberian Peninsula)
| Autor: | B. Fernández Castro, Beatriz Mouriño-Carballido, Peter Franks, Miguel Gilcoto, Marina Villamaña, Emilio Marañón |
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| Přispěvatelé: | Franks, P. J. S., Fernández-Castro, B., Gilcoto, Miguel, Marañón, Emilio, Mouriño-Carballido, Beatriz, Franks, P. J. S. [0000-0003-1862-0171], Fernández-Castro, B. [0000-0001-7797-854X], Gilcoto, Miguel [0000-0003-3025-4258], Marañón, Emilio [0000-0003-1572-2121], Mouriño-Carballido, Beatriz [0000-0001-7961-1477] |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
2510.01 Oceanografía Biológica
geography Chlorophyll a geography.geographical_feature_category 2510.07 Oceanografía Física Oceanography chemistry.chemical_compound Transformation (genetics) symbols.namesake Geophysics chemistry Space and Planetary Science Geochemistry and Petrology Peninsula Chlorophyll Phytoplankton Earth and Planetary Sciences (miscellaneous) symbols Environmental science Upwelling Lagrangian |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) |
| ISSN: | 2012-3515 |
| Popis: | 16 pages, 11 figures.-- This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License Because of the difficulties in tracking a water mass over time and conducting synoptic surveys over large spatial scales, measurements of biological variables in the ocean are often restricted to isolated Eulerian observations. Here a proof-of-concept of a pseudo-Lagrangian transformation was applied to a time series of chlorophyll-a profiles acquired at a single fixed station to diagnose the shape of a phytoplankton patch, and its physical-biological rates of transformation. During August 2013, a 27-hr time series of observations of horizontal currents, hydrographic properties, turbulent mixing and chlorophyll-a was acquired at a central station of the Ría de Vigo (NW Iberian Peninsula). A chlorophyll-a patch, tilted upward toward the inner part of the Ría, was observed moving back and forth past the sampling station. Its shape and position during the sampling period were modulated by the semi-diurnal (M2) tidal currents and the vertically sheared upwelling circulation. The pseudo-Lagrangian transformation allowed estimation of chlorophyll-a net rates of change. These rates were positive between 12 and 14 m depth, and negative elsewhere, with a mean value of −0.001 ± 0.449 days−1 within the patch maximum. After accounting for the effects of diffusion and sinking, the mean net biological production rate in the upper 15 m (0.53 ± 0.25 days−1) was comparable with in vitro estimates of the balance between phytoplankton growth and mortality obtained from dilution experiments carried out under similar conditions (0.2 ± 0.7 days−1). This pseudo-Lagrangian transformation is complementary to traditional analyses for the quantification of ecological processes and biogeochemical budgets This research was funded by projects: STRAMIX (CTM2012-35155) to Miguel Gilcoto and REMEDIOS (CTM2016-75451- C2-1-R) to B. Mouriño-Carballido from the Spanish Ministry of Economy and Competitiveness. M. Villamaña acknowledges the receipt of a FPU fellowship (FPU014/05,385) from the Spanish Ministry of Education, Culture and Sports. B. Fernández Castro was supported by the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 834330 (SO-CUP). Funding for open access charge: Universidade de Vigo/CISUG |
| Databáze: | OpenAIRE |
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