Coccolithophores in the upwelling waters of Portugal: Four years of weekly distribution in Lisbon bay

Coccolithophore response to climate and surface hydrography in Santa Barbara Basin, California, AD 1917–2004

“…5a). The observed mean sizes and standard deviations fluctuate around 2.74±0.04 µm, 3.33±0.12 µm, and 3.96±0.13 µm, respectively, and are in agreement with observed sizes of coccolithophores (Young et al, 2003 1920 1940 1960 1980 2000 1920 1940 1960 1980 2000 1920 1940 1960 1980 2000 1920 1930 1940 1950 1970 1980 1990 2000 1960 Reynolds, 2003), and derived from the version of COADS release 2 (Woodruff et al, 1998), based on combined satellite and in situ instrumental data (Reynolds et al, 2002). SST data are extracted from the IRI/LDEO Climate Data Library (http://iridl.ldeo.columbia.edu/).…”

“…We prefer relative abundances rather than concentrations or fluxes of coccoliths, since relative abundances are less influenced by dissolution and conditions of sedimentation. It has been shown that relative abundance and flux of coccoliths correlate well (Beaufort and Heussner, 1999;Silva et al, 2008).…”

Spatial and temporal variability in coccolithophore abundance and distribution in the NW Iberian coastal upwelling system

“…2 and 3c). This affinity of coccolithophores for summer stratified conditions during the upwelling season was already observed by Silva et al (2008) in Lisbon Bay, from a 4-year weekly-sampled data set. On the other hand, the coccosphere maximum in March 2012 occurred under completely different environmental conditions: cold and nutrient-rich waters characteristic of the onset of the upwelling season (Figs.…”

“…Fossil coccolith records are being extensively used for climatic reconstructions along the western Iberian Margin (Parente et al, 2004;Flores et al, 2010;Incarbona et al, 2010;Amore et al, 2012;Palumbo et al, 2013). However, the few existing studies characterizing living coccolithophore community, distribution, abundance, and ecology in the water column are mostly based on central and southern areas (Cachão and Moita, 2000;Ferreira and Cachão, 2005;Silva et al, 2008;Moita et al, 2010;Guerreiro et al, 2013;Guerreiro et al, 2014), being scarce for northern locations (Abrantes and Moita, 1999;Moita, 2001). In this context, we present a year-long data set of coccospheres and free coccoliths based on monthly sampling at several depths at two different stations (one on the inner shelf and one on the outer shelf) across the NW Iberian Margin.…”

Terrestrial versus marine archives: biostratigraphical correlation of the Middle Pleistocene lacustrine records from central Europe and their equivalents in the deep-sea cores from the Portuguese margin

“…Ac cord ing to Law rence et al (2009), the es ti mates of alkenone tem per a ture in the sub po lar North At lan tic re flect prob a bly sum mer con di tions, be cause the high est pro duc tiv ity of coccolithophorids oc curs from sum mer to early au tumn in this area. Also, near the west coast of Por tu gal, blooms of coccoliths are ob served first of all from spring to au tumn and they are re lated to the in ten sity and per sis tence of upwelling (Silva et al, 2008;Amore et al, 2012). Be cause the core MD03-2699 is un der the in flu ence of the Por tu gal upwelling sys tem, we can treat SST for this site as re flect ing mostly the sum mer tem per a tures.…”