Low-Frequency Wind Field Variability in the Chilean Upwelling Region
- Autores: Polonsky A.B.1, Serebrennikov A.N.1
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Afiliações:
- Institute of Natural and Technical Systems
- Edição: Nº 6 (2024)
- Páginas: 96-106
- Seção: ФИЗИЧЕСКИЕ ОСНОВЫ ИССЛЕДОВАНИЯ ЗЕМЛИ ИЗ КОСМОСА
- URL: https://journal-vniispk.ru/0205-9614/article/view/281651
- DOI: https://doi.org/10.31857/S0205961424060085
- EDN: https://elibrary.ru/RQNICG
- ID: 281651
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Resumo
This paper analyzes the impact of changes in surface wind (SW) speed and direction in the northern and southern parts of the Chilean upwelling (CA) on the interannual and interdecadal variability of the Ekman upwelling index. Satellite data were used for the period 1988 – 2022’s. It is shown that the increase in wind speed in the northern part of the CA region during 1997–2004 was mainly accompanied by the change in the direction of SW in the coastal zone which favors the upwelling intensification. For other periods (with the exception of certain years) this pattern was not case. In general, wind speed changes in the northern part of the CA region impact a little bit more effectively the changes in the upwelling index than changes in the SW direction. In the southern CA part, the change in the Ekman upwelling index is mostly determined by the change in the SW speed. Long-term variability of wind speed in the upwelling zone is realized in the form of a multidecadal oscillation, the period of which is estimated at 65-70 years which coincides with the typical period of the Atlantic multidecadal oscillation.
Texto integral

Sobre autores
A. Polonsky
Institute of Natural and Technical Systems
Autor responsável pela correspondência
Email: apolonsky5@mail.ru
Rússia, Sevastopol
A. Serebrennikov
Institute of Natural and Technical Systems
Email: apolonsky5@mail.ru
Rússia, Sevastopol
Bibliografia
- Abrahams A., Schlegel R.W., Smit A.J. Variation and Change of Upwelling Dynamics Detected in the World’s Eastern Boundary Upwelling Systems // Front. Mar. Sci. 2021. V. 8. 626411. https://doi.org/10.3389/fmars.2021.626411
- Aguirre C., García-Loyola S., Testa G., Silva D., Farías L. Insight into anthropogenic forcing on coastal upwelling off south-central Chile // Elementa: Sci. Anthropocene. 2018. V. 6(1). 59. https://doi.org/10.1525/elementa.314
- Aguirre C., Pizarro O., Strub P.T., Garreaud, R., Barth J.A. Seasonal dynamics of the near-surface alongshore flow off central Chile // J. Geophys. Res. Ocean. 2012. 117. https://doi.org/10.1029/2011JC007379
- Ancapichún S., Garcés-Vargas J. Variability of the Southeast Pacific Subtropical Anticyclone and its impact on sea surface temperature off north-central Chile // Cienc. Mar. 2015. V. 41. P. 1–20.
- Averyanova Е.А., Polonsky А.B. Issledovanie izmenchivosti turbulentnykh potokov tepla s ispolzovaniem razlozheniya na empiricheskie ortogonalnye funktsii // Zaklyuchitelnyy otchet po NIR “Fundamentalnye issledovaniya protsessov v klmaticheskoy sisteme, opredelyayushchikh prostranstvenno-vremennuyu ismenchivost prirodnoy sredy globalnogo i regionalnogo masshtabov”, registratsionnyy № NIOKTR 121122300074-7. 2023. P. 19–27.
- Bakun A. Global climate change and intensification of coastal ocean upwelling // Science. 1990. V. 247. P. 198–201. https://doi.org/10.1126/science.247.4939.198
- Bakun A., Black B.A., Bograd S.J., García-Reyes M., Miller A.J., Rykaczewski R.R., et al. Anticipated effects of climate change on coastal upwelling ecosystems // Curr. Clim. Change Rep. 2015. V. 1. P. 85–93. https://doi.org/10.1007/s40641-015-0008-4
- Bello M., Barbieri M., Salinas S., Soto L. Surgencia costera en la zona central de Chile, durante el ciclo El Niño-La Niña 1997–1999. In El Niño-La Niña 1997–2000. // Sus Efectos en Chile. CONA, Chile, Valparaíso. 2004. P. 77–94.
- Bordbar M.H., Mohrholz V., Schmidt M. The Relation of Wind-Driven Coastal and Offshore Upwelling in the Benguela Upwelling System // J. of phys. Oceanography, 2021. V. 51. P. 3117–3133. https://doi.org/10.1175/JPO-D-20-0297.1
- Carr M.E., Kearns E.J. Production regimes in four Eastern Boundary Current systems // Deep Sea Res. 2003. Part II: Top. Stud. Oceanogr. V. 50. P. 3199–3221.
- Center of mass, 2023. URL: https://en.wikipedia.org/wiki/Center_of_mass (date of access: 10.12.2023).
- Climate Data Store, 2023. URL: https://cds.climate.copernicus.eu/cdsapp (date of access: 10.12.2023).
- Cropper T.E., Hanna E., Bigg G.R. Spatial and temporal seasonal trends in coastal upwelling off Northwest Africa, 1981–2012 // J. Deep-Sea Research. 2014. Part I. V. 86. P. 94–111. https://doi.org/10.1016/j.dsr.2014.01.007
- FAO. El Estado Mundial de la Pesca y la Acuicultura 2016. Contribución a la Seguridad Alimentaria y la Nutrición Para Todos; Organización de las Naciones Unidas para la Alimentación y la Agricultura: Roma, Italia. 2016. 224 p.
- Fuenzalida R., Schneider W., Garcés-Vargas J., Bravo L. Satellite altimetry data reveal jet-like dynamics of the Humboldt Current // J. Geophys. Res. Ocean. 2008. 113. https://doi.org/10.1029/2007JC004684
- Garc´ıa-Reyes M., Koval G., Sydeman W.J., Palacios D., Bedriñana-Romano L., DeForest K., Montenegro Silva C., Sepu´ lveda M. and Hines E. Most eastern boundary upwelling regions represent thermal refugia in the age of climate change // Front. Mar. Sci. 2023. V. 10. 1158472. https://doi.org/10.3389/fmars.2023.1158472
- Muñoz R., Odette A. V., Pedro A. F., Piero M., Marcus S., Gonzalo S. S. On the phenology of coastal upwelling off central-southern Chile // Dynamics of Atmospheres and Oceans. 2023. V. 104. 101405. https://doi.org/10.1016/j.dynatmoce.2023.101405
- Oyarzún D., Brierley C. The future of coastal upwelling in the Humboldt current from model projections // Climate Dynamics. 2019. V. 52. Issue 1–2. P. 599-615. https://doi.org/10.1007/s00382-018-4158-7
- Patti B., Guisande C., Vergara A., Riveiro I., Maneiro I., Barreiro A., Bonanno A., Buscaino G., Cuttitta A., Basilone G. Factors responsible for the differences in satellite-based chlorophyll a concentration between the major global upwelling areas // Estuar. Coast. Shelf Sci. 2008. V. 76. P. 775–786. https://doi.org/10.1016/j.ecss.2007.08.005
- Pinochet A., José G.-V., Carlos L., Francisco O. Seasonal Variability of Upwelling off Central-Southern Chile // Remote Sens. 2019. V. 11. 1737. https://doi.org/10.3390/RS11151737
- Polonsky A.B., Serebrennikov A.N. On the Change in the Sea Surface Temperature in the Benguela Upwelling Region: Part II. Long-Term Tendencies // Izvestiya, Atmospheric and Oceanic Physics. 2020. V.56. No. 9. P. 970–978. https://doi.org/10.1134/ S0001433820090200
- Polonsky A.B., Serebrennikov A.N. Influence of Different Satellite Data on Surface Winds on Coastal Upwelling. Part 2: Pacific Ocean // Izvestiya, Atmospheric and Oceanic Physics. 2021. V. 57. No. 12. P. 1670–1679. https://doi.org/10.1134/S0001433821120173
- Polonsky A.B., Serebrennikov A.N. What is the Reason for the Multiyear Trends of Variability in the Benguela Upwelling? // Izvestiya, Atmospheric and Oceanic Physics. 2022. V. 58. № 12. P. 1450–1457. https://doi.org/10.1134/S0001433822120192
- Polonsky А.B., Voskresenskaya Е.N. O statisticheskoy strukture gidrometeorologicheskikh poley v Severnoy Atlantike // Morskoy gidrofizicheskiy zhurnal. 2004. №1. P. 14–25
- Remote Sensing Systems, 2023. URL: https://www.remss.com (date of access: 10.12.2023).
- Shapiro S.S. and Wilk M.B. An analysis of variance test for normality (complete samples) // Biometrika, 1965. V. 52. P. 591–611.
- Schneider W., Donoso D., Garcés-Vargas J., Escribano R. Water-column cooling and sea surface salinity increase in the upwelling region off central-south Chile driven by a poleward displacement of the South Pacific High // Prog. in Oceanogr. 2017. V.151. P. 38–48 http://dx.doi.org/10.1016/j.pocean.2016.11.004 0079-6611
- Schwing F.B., Farrell M.O., Steger J.M., Baltz K. Coastal upwelling indices west coast of North America 1946–1995 // NOAA Tech. Rep. NMFS SWFSC 231. 1996. 144 p. NOAA, Seattle, Wash.
- Schwing F.B., Mendelssohn R. Increased coastal upwelling in the California Current System. // J. of Geophys. Res.: Oceans. 1997. V. 102. Issue C2. P. 3421–3438. https://doi.org/10.1029/96JC03591
- Strub P.T., James C., Montecino V., Rutllant J.A., Blanco J.L. Ocean circulation along the southern Chile transition region (38°–46° S): Mean, seasonal and interannual variability, with a focus on 2014–2016 // Prog. Oceanogr. 2019. 172. https://doi.org/10.1016/j.pocean.2019.01.004
- Tim N., Zorita E., Hünicke B. Decadal variability and trends of the Benguela Upwelling System as simulated in a high ocean-only simulation // Ocean Sci. 2015. V. 11. P. 483–502. https://doi.org/10.5194/os-11–483–2015
- Varela R., Álvarez I., Santos F., et al. Has upwelling strengthened along worldwide coasts over 1982-2010? // Sci. Rep. 2015. V. 5. 10016. https://doi.org/10.1038/srep10016
- Vershovskiy М.G., Kondratovich K.V. Yuzhno-tikhookeanskiy subtropicheskiy antitsiklon: intensivnost i lokalizatsiya // Meteorologiya i gidrologiya. 2007. №12. P. 29–34.
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