Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional de Colombia
2022
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=169575356005 https://www.redalyc.org/journal/1695/169575356005/ https://www.redalyc.org/journal/1695/169575356005/html/ https://www.redalyc.org/journal/1695/169575356005/169575356005.epub https://www.redalyc.org/journal/1695/169575356005/movil https://doi.org/10.15446/rbct.n51.101365 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- Estimation of pH on total scale in coastal environments for the understanding of the variability of the carbonate system in the context of ocean acidification Erika Paola López Cesar A. Bernal Sven Zea Ciencias de la Tierra pH respiration Carbonate system primary production ocean acidification Most of the theoretical and practical development of the ocean acidification (OA) phenomenon involves the open ocean, and not much is known of the significance of variation in pH and carbonate system in coastal environments and the effect, if any, of OA. Traditional potentiometric pH measurements are carried out on the NBS scale (pHNBS), developed for freshwaters, but for OA it is necessary to use the total scale (pHT), which includes the additional ions of seawater. Using a series of in-situ measurements of potential, carried out with a pHNBS electrode in the artificial coastal lagoon La Escollera in Santa Marta (Colombia), a methodology to calculate p H T was tested. For this, the equation org.siir.client.entities.InlineFormula@43ce20 was used, which calculates pHT(X) of the sample from the pHT(TRIS) of the TRIS standard solution, the potentials E measured at temperature T, and the constants R and F. ETRIS was determined experimentally for the lagoon temperature range, and the linear regression showed a coefficient of determination (R2) of 0.9977. In a first qualitative analysis, it was verified that pH variations during the day-night cycle are closely associated with those of oxygen, from the production and consumption of CO2 by photosynthesis and respiration. These high-frequency variations are of greater magnitude than those of the open ocean, raising questions about the real effect of OA on coastal ecosystems. 2022 artículo científico 0120-3630 https://www.redalyc.org/articulo.oa?id=169575356005 https://www.redalyc.org/journal/1695/169575356005/ https://www.redalyc.org/journal/1695/169575356005/html/ https://www.redalyc.org/journal/1695/169575356005/169575356005.epub https://www.redalyc.org/journal/1695/169575356005/movil https://doi.org/10.15446/rbct.n51.101365 en http://www.redalyc.org/revista.oa?id=1695 Boletín de Ciencias de la Tierra application/pdf Universidad Nacional de Colombia Boletín de Ciencias de la Tierra (Colombia) Num.51