Wind variability in the Canary Current during the last 70 years
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Abstract
Climate evolves following natural variability, and knowledge of these trends is of paramount importance to understand future scenarios in the frame of global change. Obtaining local data is also of importance since climatic anomalies depend on the geographical area. In this sense, the Canary Current is located in one of the major eastern boundary current systems and is mainly driven by the trade winds. The latter promote Ekman transport and give rise to one of the most important upwelling zones of the world on the northwest African coast. Nearly 30 years ago, Bakun (1990) raised a hypothesis contending that coastal upwelling in eastern boundary upwelling systems (EBUSs) might be intensified by global warming due to the enhancement of the trade winds, increasing pressure differences between the ocean and the continent. Using available NCEP/NCAR wind data north of the Canary Islands from 1948 to 2017, we show that trade wind intensity experienced a net decrease of 1 m s −1 . Moreover, these winds are strongly influenced, as expected, by large-scale atmospheric patterns such as the North Atlantic Oscillation (NAO). In addition, we found a relationship between the wind pattern and the Atlantic Multidecadal Oscillation (AMO), indicating that the ocean contributes to multidecadal atmospheric variability in this area of the ocean with a considerable lag ( > 10 years).
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While increasing Chl-a concentrations have been observed in most EBUS, large areas in the Canary upwelling system showed recent decreasing trends in Chl-a, NPP, and meridional wind.
“However, while increasing concentrations of Chl-a have been observed in most EBUS, large areas in the Canary upwelling system showed recent decreasing trends in Chl-a, NPP (based on ocean color models) and meridional wind (Betancort et al., 2020;Demarcq, 2009;Gómez-Letona et al., 2017).”
From Recent Trends in SST, Chl‐<i>a</i>, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre (2021) · cites this paper as Betancort et al., 2020
The Results and Discussion report a long-term decrease in Trade Wind intensity north of the Canary Islands, which supports a narrower wind-decline claim. They also report that intensity increased during the last decade, rather than showing a recent decrease. The paper studies wind at one location and does not establish decreasing Chl-a or NPP across large areas. (LLM, conf=0.86)
Experimental — accuracy not yet measuredBetancort et al. (2020) detected a net decrease of up to 1 m s^-1 in wind intensity north of the Canary Islands from 1948 to 2017.
“Similarly, Betancort et al. (2020) detected a net decrease of up to 1 m s -1 in wind intensity north of the Canary Islands from 1948 to 2017 using the same data set.”
From Recent Trends in SST, Chl‐<i>a</i>, Productivity and Wind Stress in Upwelling and Open Ocean Areas in the Upper Eastern North Atlantic Subtropical Gyre (2021) · cites this paper as Betancort et al. (2020)
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Sorted by citations
Siemer, J. P., Machín, F., González‐Vega, A., Arrieta, J. M., Gutiérrez‐Guerra, M. A., Pérez‐Hernández, M. D., Vélez‐Belchí, P., Hernández‐Guerra, A., & Fraile‐Nuez, E. (2021) · Journal of Geophysical Research: Oceans · doi:10.1029/2021jc017268 · Cited by 50 · see citing works
- Authors
- Marrero-Betancort, N., Marcello, J., Rodríguez Esparragón, D., & Hernández-León, S.
- Affiliations
- Universidad de Las Palmas de Gran Canaria (ES)
- Corresponding author
- Marcello, Javier
- Venue
- Ocean Science
- Publisher
- Copernicus GmbH
- Published
- 2020-08-06
- Volume
- 16
- Issue
- 4
- Pages
- 951-963
- ISSN
- 1812-0784 (ISSN-L)
- 1812-0792
- OpenAlex
- W3047849105
- Cited by
- 16
- References
- 3
- Citations by year
- 2026: 6 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 1
- FWCI
- 0.74
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Ocean science (publishedVersion, cc-by)
- Acceda (Universidad de Las Palmas de Gran Canaria) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- European Regional Development Fund
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
- Keywords
- Canary Current, coastal upwelling, eastern boundary upwelling systems, North Atlantic Oscillation, Atlantic Multidecadal Oscillation, ocean-atmosphere interaction, multidecadal climate variability, global warming, NCEP/NCAR reanalysis
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