Satellite-derived Arctic Bloom Dynamics

We computed de-seasoned anomalies of monthly Chl a, east-west winds and sea ice concentration by first removing the monthly climatology from monthly means, producing de-seasoned anomalies from September 1997 to December 2019. Thereafter, we produced composite maps by averaging monthly de-seasoned anomalies during and outside of the bloom period. Composites maps of the de-seasoned anomalies are presented in Fig. 2.
Furthermore, correlation maps between the satellite-derived Chl a and the east-west wind de-seasoned anomalies and between the satellite-derived Chl a and the sea ice concentration de-seasoned anomalies were produced by using the Pearson Correlation test. Correlation maps were assessed for multiple lag periods with the highest correlation coefficients found for winds leading bloom by 1-month.

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Moreau S., Hattermann T., de Steur L., Kauko H.M., Ahonen H., Ardelan M., Assmy P., Chierici M., Descamps S., Dinter T., Falkenhaug T., Fransson A., Grønningsæter E., Hallfredsson E.H., Huhn O., Lebrun A., Lowther A., Lübcker N., Monteiro P., Peeken I., Roychoudhury A., Różańska M., Ryan-Keogh T., Sanchez N., Singh A., Simonsen J.H., Steiger N., Thomalla S.J., van Tonder A., Wiktor J.M, & Steen H. (2023). Wind-driven upwelling of iron sustains dense blooms and food webs in the eastern Weddell Gyre. Nature Communications, 14, 1303.

Publication 2023

Maps Sea ice Winds

Corresponding Organization : Norwegian Polar Institute

Other organizations : Norwegian Institute of Marine Research, Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, University of Bremen, Laboratoire d’Océanographie de Villefranche, Sorbonne Université, Centre National de la Recherche Scientifique, University of New Mexico, Stellenbosch University, Instytut Oceanologii Polskiej Akademii Nauk, Bjerknes Centre for Climate Research, University of Bergen, University of Pretoria

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Variable analysis

independent variables

East-west winds
Sea ice concentration

dependent variables

Chl a

control variables

Monthly climatology

controls

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