 |
| Titel |
Coccolithophore response to climate and surface hydrography in Santa Barbara Basin, California, AD 1917–2004 |
| VerfasserIn |
M. Grelaud, A. Schimmelmann, L. Beaufort |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 10 ; Nr. 6, no. 10 (2009-10-06), S.2025-2039 |
| Datensatznummer |
250004030
|
| Publikation (Nr.) |
 copernicus.org/bg-6-2025-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| The varved sedimentary AD 1917–2004 record from the depositional center of
the Santa Barbara Basin (SBB, California) was analyzed with monthly to
triannual resolution to yield relative abundances of six coccolithophore
species representing at least 96% of the coccolithophore assemblage.
Seasonal/annual relative abundances respond to climatic and surface
hydrographic conditions in the SBB, whereby (i) the three species G. oceanica, H. carteri and F. profunda are
characteristic of the strength of the northward flowing warm California
Counter Current, (ii) the two species G. ericsonii and G. muellerae are associated with the cold
equatorward flowing California Current, (iii) and E. huxleyi appears to be endemic to
the SBB. Spectral analyses on relative abundances of these species show that
all are influenced by the El Niño Southern Oscillation (ENSO) and/or by
the Pacific Decadal Oscillation (PDO). Increased relative abundances of G. oceanica and
H. carteri are associated with warm ENSO events, G. muellerae responds to warm PDO events and the
abundance of G. ericsonii increases during cold PDO events. Morphometric parameters
measured on E. huxleyi, G. muellerae and G. oceanica indicate increasing coccolithophore shell carbonate mass
from ~1917 until 2004 concomitant with rising pCO2 and sea surface
temperature in the region of the SBB. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|