Global planktonic foraminifera seasonality ...

• Main Authors: Jonkers, Lukas, Kucera, Michal
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2015
• Subjects: Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.846529; https://doi.pangaea.de/10.1594/PANGAEA.846529

Shell fluxes of planktonic Foraminifera species vary intra-annually in a pattern that appears to follow the seasonal cycle. However, the variation in the timing and prominence of seasonal flux maxima in space and among species remains poorly constrained. Thus, although changing seasonality may result in a flux-weighted temperature offset of more than 5° C within a species, this effect is often ignored in the interpretation of Foraminifera-based paleoceanographic records. To address this issue we present an analysis of the intra-annual pattern of shell flux variability in 37 globally distributed time series. The existence of a seasonal component in flux variability was objectively characterised using periodic regression. This analysis yielded estimates of the number, timing and prominence of seasonal flux maxima. Over 80% of the flux series across all species showed a statistically significant periodic component, indicating that a considerable part of the intra-annual flux variability is predictable. ... : Supplement to: Jonkers, Lukas; Kucera, Michal (2015): Global analysis of seasonality in the shell flux of extant planktonic Foraminifera. Biogeosciences, 12(7), 2207-2226 ...