Publication Date:
2021-07-10
Description:
Annual radiolarian flux (1954-1986) extrapolated from varved Santa Barbara Basin sediments was compared to instrumental data to examine the effect of interannual climate variability. Paleo-reconstructions over large geographic areas or 10^3 years and longer typically rely on changes in species composition to signal environment or climate shifts. In the relatively short period studied, climate fluctuations were insufficient to significantly alter the assemblage, but there was considerable variability in the total flux of radiolarians. This variability, greatest on 5- to 25-year time scales, appears to be linked to regional climate variability. Total flux correlates to regional California sea surface temperature and the composite of sea level pressure over the Northern Hemisphere for years of high radiolarian flux resembles positive PNA circulation.
Keywords:
Atmospheric Sciences
;
Earth Sciences
;
Oceanography
;
PACLIM
Repository Name:
AquaDocs
Type:
conference_item
Format:
application/pdf
Format:
application/pdf
Format:
107-118
