Cited by 127Oceanographic and Atmospheric ProcessesClimate variability and modelsMarine and coastal ecosystems

Coastal upwelling off Peru during normal and El Niño times, 1981–1984

Huyer, Adriana, Smith, Robert L., Paluszkiewicz, Theresa·1987·Journal of Geophysical Research: Oceans

Abstract

Repeated conductivity, temperature, and depth (CTD) sections were made across the continental margin off Peru at 5°S and 10°S between November 1981 and May 1984, i.e., before, during, and after El Niño of 1982–1983. Coastal sea level at Paita (5°S) and Callao (12°S) began to rise in early October 1982 and returned to normal in July 1983. Coastal winds, which are normally favorable for upwelling, remained normal during October 1982; between November 1982 and May 1983 they were weaker than normal at Talara and Paita (5°S) but stronger than normal at Callao (12°S). Between mid‐March and mid‐April 1983, winds at 5°S were very weak or even unfavorable for upwelling. Repeated CTD sections at 5°S show signs of active upwelling (a negative onshore surface temperature gradient and upward sloping isotherms near the coast) whenever local winds were favorable for upwelling, but not when winds were calm or unfavorable. At 10°S, winds remained favorable for upwelling throughout El Niño. At both 5°S and 10°S, the apparent source depth of upwelling waters, 50–100 m, remained the same before, during, and after El Niño; this layer is normally below the thermocline, but during El Niño it was at the top of the depressed thermocline. The upwelling that occurred during El Niño resulted only in the upwelling of warm, nutrient‐poor waters. In May 1983, a CTD section at 10°S indicated that upwelling had ceased there in spite of continued strong, upwelling‐favorable winds; this cessation of upwelling…

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Crossref · 10.1029/jc092ic13p14297

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Authors
Huyer, A., Smith, R. L., & Paluszkiewicz, T.
Venue
Journal of Geophysical Research: Oceans
Published
1987-12-15
Volume
92
Issue
C13
Pages
14297-14307
ISSN
0148-0227 (ISSN-L)
OpenAlex
W2029598829
Cited by
127
References
19
Citations by year
2026: 3 · 2025: 6 · 2024: 5 · 2023: 3 · 2022: 5 · 2021: 6 · 2020: 2 · 2019: 6 · 2018: 3 · 2017: 3 · 2016: 6 · 2015: 4 · 2014: 5 · 2013: 6 · 2012: 5
FWCI
2.65
Type
journal article
Language
en
Open access
closed
Locations
Journal of Geophysical Research Atmospheres (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
Keywords
coastal upwelling, El Niño, 1982-1983 El Niño, Peru continental margin, sea level rise, coastal wind, thermocline, alongshore pressure gradient, geostrophic currents, nutrient-poor waters, Paita, Callao

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