Effect of Santa Ana winds on bio-optical properties off Baja California
The effect of Santa Ana winds on bio-optical properties (absorption coefficients of particles, detritus and phytoplankton) off Baja California (Mexico) was evaluated using data obtained during four cruises in January, April, August and October 1999. Meteorological data from a station at Todos Santo...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2005-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/60 |
| _version_ | 1797279450419691520 |
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| author | Ramón Sosa-Avalos Gilberto Gaxiola-Castro Reginaldo Durazo B Greg-Mitchell |
| author_facet | Ramón Sosa-Avalos Gilberto Gaxiola-Castro Reginaldo Durazo B Greg-Mitchell |
| author_sort | Ramón Sosa-Avalos |
| collection | DOAJ |
| description |
The effect of Santa Ana winds on bio-optical properties (absorption coefficients of particles, detritus and phytoplankton) off Baja California (Mexico) was evaluated using data obtained during four cruises in January, April, August and October 1999. Meteorological data from a station at Todos Santos Bay and satellite-derived wind data indicated three Santa Ana events during October 1999, with low relative humidity, high air temperature and persistent ENE winds. The absorption coefficient of detritus (adT) in surface samples was ten-fold higher in October because of the inorganic material wind-driven by the Santa Ana events that occurred from 9 to 11 and from 17 to 20 October, 1999. The absorption coefficients of particles (ap) and phytoplankton (aɸ) in the euphotic zone were higher in the April survey as a result of higher phytoplankton abundance. The ap, a and Kd values in the euphotic zone were fitted to chlorophyll using a power function, with an explained variance of 37%, 72% and 16%, respectively. On excluding the October adT surface values, chlorophyll explained 82% of the changes in the absorption coefficients (ap and aɸ), and 87% of the Kd variability. Approximately 80% of the chlorophyll concentration can be explained by the water column spectral reflectance relationship: Rrs(443)/Rrs(555). According to our results, regional chlorophyll estimates from water column bio-optical information were not greatly affected by wind-borne dust transported during the October 1999 Santa Ana events.
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| first_indexed | 2024-03-07T16:25:31Z |
| format | Article |
| id | doaj.art-368b0e8eb8cc43f6bc00cc3dac7e329f |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:25:31Z |
| publishDate | 2005-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-368b0e8eb8cc43f6bc00cc3dac7e329f2024-03-03T18:34:30ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532005-03-0131210.7773/cm.v31i2.60Effect of Santa Ana winds on bio-optical properties off Baja CaliforniaRamón Sosa-Avalos0Gilberto Gaxiola-Castro1Reginaldo Durazo2B Greg-Mitchell3Universidad de ColimaCentro de Investigación Científica y Educación Superior de EnsenadaUniversidad Autónoma de Baja CaliforniaScripps Institution of Oceanography The effect of Santa Ana winds on bio-optical properties (absorption coefficients of particles, detritus and phytoplankton) off Baja California (Mexico) was evaluated using data obtained during four cruises in January, April, August and October 1999. Meteorological data from a station at Todos Santos Bay and satellite-derived wind data indicated three Santa Ana events during October 1999, with low relative humidity, high air temperature and persistent ENE winds. The absorption coefficient of detritus (adT) in surface samples was ten-fold higher in October because of the inorganic material wind-driven by the Santa Ana events that occurred from 9 to 11 and from 17 to 20 October, 1999. The absorption coefficients of particles (ap) and phytoplankton (aɸ) in the euphotic zone were higher in the April survey as a result of higher phytoplankton abundance. The ap, a and Kd values in the euphotic zone were fitted to chlorophyll using a power function, with an explained variance of 37%, 72% and 16%, respectively. On excluding the October adT surface values, chlorophyll explained 82% of the changes in the absorption coefficients (ap and aɸ), and 87% of the Kd variability. Approximately 80% of the chlorophyll concentration can be explained by the water column spectral reflectance relationship: Rrs(443)/Rrs(555). According to our results, regional chlorophyll estimates from water column bio-optical information were not greatly affected by wind-borne dust transported during the October 1999 Santa Ana events. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/60particle absorption coefficientSanta Ana windsCalifornia Current |
| spellingShingle | Ramón Sosa-Avalos Gilberto Gaxiola-Castro Reginaldo Durazo B Greg-Mitchell Effect of Santa Ana winds on bio-optical properties off Baja California Ciencias Marinas particle absorption coefficient Santa Ana winds California Current |
| title | Effect of Santa Ana winds on bio-optical properties off Baja California |
| title_full | Effect of Santa Ana winds on bio-optical properties off Baja California |
| title_fullStr | Effect of Santa Ana winds on bio-optical properties off Baja California |
| title_full_unstemmed | Effect of Santa Ana winds on bio-optical properties off Baja California |
| title_short | Effect of Santa Ana winds on bio-optical properties off Baja California |
| title_sort | effect of santa ana winds on bio optical properties off baja california |
| topic | particle absorption coefficient Santa Ana winds California Current |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/60 |
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