Abstract
Comparative estimation of long-term trends in the variability of the largest Atlantic upwellings (Canary and Benguela) has been carried out in this paper. Satellite data on the sea surface temperature and three surface wind datasets prepared by different scientific groups have been used. The difference in the calculated absolute vertical velocities due to alongshore wind drift and horizontal wind-field nonuniformity reach tens of percent. All time series demonstrate the common tendency for the intensification of the upwellings from the 1980s to the early 1990s. This confirms published materials concerning the intensification of Canary and Benguela upwellings under global warming. However, since the late 1990s, the intensification of the upwellings has nearly ceased. This proves the highly important role of the natural interdecadal climate variations in the variability of intensity of generation of upwellings during the period of regular satellite measurements.
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ACKNOWLEDGMENTS
We express our gratitude to the anonymous reviewer for a highly professional and friendly assessment of the first version of the manuscript and constructive suggestions for its improvement.
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This paper was prepared as part of the subject of state assignment no. 0012-2019-0002, “Fundamental Studies of Climate-System Processes That Determine the Spatiotemporal Variability of the Natural Environment on a Global and Regional Scale.”
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Polonsky, A.B., Serebrennikov, A.N. Long-Term Tendencies of Intensity of Eastern Boundary Upwelling Systems Assessed from Different Satellite Data. Part 1: Atlantic Upwellings. Izv. Atmos. Ocean. Phys. 57, 1658–1669 (2021). https://doi.org/10.1134/S0001433821120161
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DOI: https://doi.org/10.1134/S0001433821120161