We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Temporal variations of water pCO<sub>2</sub> and the air-water CO<sub>2</sub> flux at a coastal location in the southern California Current System: diurnal to interannual scales.
- Authors
de Lourdes Aurora Coronado-Álvarez, Luz; Álvarez-Borrego, Saúl; Lara-Lara, José Rubén; Solana-Arellano, Elena; Hernández-Ayón, José Martín; Zirino, Alberto
- Abstract
The aim of this work was to identify processes that cause surface CO2 partial pressure (pCO2W) and air-water CO2 flux (FCO2) variations at a coastal location in the California Current System, from semidiurnal to interannual time scales. Such processes may include sea breeze, upwelling, El Niño/Southern Oscillation (ENSO) cycle and "The Blob" (strong positive temperature anomalies in the NE Pacific). Sea surface temperature (SST, 2008-2014) and pCO2W (2008-2015) time series were generated with data collected from a MAPCO2 buoy anchored at 100 m depth and 5 km from Punta Banda (31.6°N, 116.6°W), Baja California, México. There were significant changes in SST, pCO2W and FCO2 that lasted periods that were as short as a few hours and as large as interannual time frames. Spectral analysis showed significant semidiurnal, diurnal, ∼15-d and ∼28-d components of variation. Time series were divided into periods according to the Multivariate ENSO Index and the Blob event. Bayesian t tests show that both pCO2W and FCO2 had high credibility of being different between periods. During La Niña conditions (2010-2011), maximum pCO2W and FCO2 values were higher and the minimum values were lower, than during "normal," El Niño and Blob conditions. The pCO2W range during this La Niña event was from 131 to 864 matm and the FCO2 range was from -6.9 to 40.4 mmol C·m-2·d-1. The FCO2 range during the Blob was from near equilibrium to ∼2.5 mmol C·m-2·d-1. The extreme values for the FCO2 integral (± standard error), for all periods, were-57.0 ± 0.01 mmol C·m-2 for El Niño and 257.0 ± 0.03 mmol C·m-s for La Niña. The mean FCO2 value (± standard error) was 0.04 ± 0.02 mol C·m-2·yr-1. The buoy location was found to be a very weak source of CO2 during the study period.
- Subjects
CALIFORNIA Current; CARBON dioxide in seawater; CARBON dioxide in water; COMPOSITION of water; COASTAL ecology; PARTIAL pressure; AIR-water interfaces
- Publication
Ciencias Marinas, 2017, Vol 43, Issue 3, p137
- ISSN
0185-3880
- Publication type
Article
- DOI
10.7773/cm.v43i3.2707