Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California)
We conducted a study from January 2002 to February 2008 on silicoflagellate fluxes in Alfonso Basin at the entrance to the Gulf of California. Thirteen taxa were identified in sediment trap samples, with Octactis pulchra as the dominant species. Total flux climatology reached a maximum value of 5×10...
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ftipnmexicoir:oai:www.repositoriodigital.ipn.mx:123456789/13290 2023-07-16T04:01:04+02:00 Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) Martinez Lopez, Aida Álvarez-Gómez, Irela G. Durazo, Reginaldo 2012 http://www.repositoriodigital.ipn.mx/handle/123456789/13290 en eng Botanica Marina 0006-8055 http://www.repositoriodigital.ipn.mx/handle/123456789/13290 seasonal pattern interannual variability Gulf of California climate variability subtropical region silicoflagellates Article 2012 ftipnmexicoir 2023-06-28T10:39:39Z We conducted a study from January 2002 to February 2008 on silicoflagellate fluxes in Alfonso Basin at the entrance to the Gulf of California. Thirteen taxa were identified in sediment trap samples, with Octactis pulchra as the dominant species. Total flux climatology reached a maximum value of 5×106 skeletons m-2 day-1 in December and then sharply decreased to a minimum value in February (2.3×103 skeletons m-2 day-1) concurrently with the climatological sea surface temperature (SST) minimum. Subsequently, there was a positive trend with a second relative maximum of 1.6×106 skeletons m-2 day-1 in September coincident with a maximum in climatological SST. During this period, there was a similar increase to 1.4×106 skeletons m-2 day-1 in May. Factor analysis identified three patterns of variation: “subtropical oceanic,” “subarctic,” and “equatorial El Niño.” Factors had reasonable correlations with the Pacific decadal oscillation (PDO), North Pacific Gyre oscillation (NPGO), and El Niño Modoki indices (r=0.53, 0.67, and 0.63, respectively). The first and second modes were apparently linked to decadal climatic conditions correlated to PDO and NPGO, as suggested by the silicoflagellate species Dictyocha messanensis forma messanensis and the assemblage of D. epiodon and Distephanus speculum, respectively; the third mode was related to the presence of warm equatorial-oceanic waters identified by D. messanensis forma spinosa, which defines El Niño influence. These results demonstrate the importance of the region where there is a confluence of the low-frequency, high-latitude PDO, NPGO, and high-frequency El Niño signals. Instituto Politécnico Nacional (IPN). Centro Interdisciplinario de Ciencias Marinas Ciencias marinas PDF Article in Journal/Newspaper Subarctic El Instituto Politécnico Nacional (IPN): Repositorio Digital Institucional (RDI) Pacific |
institution |
Open Polar |
collection |
El Instituto Politécnico Nacional (IPN): Repositorio Digital Institucional (RDI) |
op_collection_id |
ftipnmexicoir |
language |
English |
topic |
seasonal pattern interannual variability Gulf of California climate variability subtropical region silicoflagellates |
spellingShingle |
seasonal pattern interannual variability Gulf of California climate variability subtropical region silicoflagellates Martinez Lopez, Aida Álvarez-Gómez, Irela G. Durazo, Reginaldo Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
topic_facet |
seasonal pattern interannual variability Gulf of California climate variability subtropical region silicoflagellates |
description |
We conducted a study from January 2002 to February 2008 on silicoflagellate fluxes in Alfonso Basin at the entrance to the Gulf of California. Thirteen taxa were identified in sediment trap samples, with Octactis pulchra as the dominant species. Total flux climatology reached a maximum value of 5×106 skeletons m-2 day-1 in December and then sharply decreased to a minimum value in February (2.3×103 skeletons m-2 day-1) concurrently with the climatological sea surface temperature (SST) minimum. Subsequently, there was a positive trend with a second relative maximum of 1.6×106 skeletons m-2 day-1 in September coincident with a maximum in climatological SST. During this period, there was a similar increase to 1.4×106 skeletons m-2 day-1 in May. Factor analysis identified three patterns of variation: “subtropical oceanic,” “subarctic,” and “equatorial El Niño.” Factors had reasonable correlations with the Pacific decadal oscillation (PDO), North Pacific Gyre oscillation (NPGO), and El Niño Modoki indices (r=0.53, 0.67, and 0.63, respectively). The first and second modes were apparently linked to decadal climatic conditions correlated to PDO and NPGO, as suggested by the silicoflagellate species Dictyocha messanensis forma messanensis and the assemblage of D. epiodon and Distephanus speculum, respectively; the third mode was related to the presence of warm equatorial-oceanic waters identified by D. messanensis forma spinosa, which defines El Niño influence. These results demonstrate the importance of the region where there is a confluence of the low-frequency, high-latitude PDO, NPGO, and high-frequency El Niño signals. Instituto Politécnico Nacional (IPN). Centro Interdisciplinario de Ciencias Marinas Ciencias marinas PDF |
format |
Article in Journal/Newspaper |
author |
Martinez Lopez, Aida Álvarez-Gómez, Irela G. Durazo, Reginaldo |
author_facet |
Martinez Lopez, Aida Álvarez-Gómez, Irela G. Durazo, Reginaldo |
author_sort |
Martinez Lopez, Aida |
title |
Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
title_short |
Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
title_full |
Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
title_fullStr |
Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
title_full_unstemmed |
Climate variability and silicoflagellate fluxes in Alfonso Basin (southern Gulf of California) |
title_sort |
climate variability and silicoflagellate fluxes in alfonso basin (southern gulf of california) |
publisher |
Botanica Marina |
publishDate |
2012 |
url |
http://www.repositoriodigital.ipn.mx/handle/123456789/13290 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
0006-8055 http://www.repositoriodigital.ipn.mx/handle/123456789/13290 |
_version_ |
1771550516064550912 |