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Oceanographic Conditions of the Eastern Tropical Pacific

  • Paul C. FiedlerEmail author
  • Miguel F. Lavín
Part of the Coral Reefs of the World book series (CORW, volume 8)

Abstract

The eastern Pacific warm pool supports reef-building corals, as well as distinct communities of plankton, fishes, marine mammals and birds. This habitat is characterized by warm, low-salinity surface water lying on top of a strong, shallow thermocline. It is bounded by the South Equatorial Current and equatorial cold tongue to the south, cooler and more saline subtropical water to the northwest, and cold eastern boundary currents to the north and south (California and Peru Currents). The continental boundary influences atmospheric forcing by gap winds during winter and by causing the rainy Intertropical Convergence Zone to be located north of the equator and over the warm pool. Patterns of waves, tides and tropical cyclones impinging on coral reefs are described. The structure and variability of water masses and circulation are determined by solar and atmospheric processes, both within and outside of the region. To the west of the Galápagos, surface circulation is predominantly the east-west equatorial currents. Near the coast, surface circulation is modified by the coastal boundary, local winds, eddies, and interaction with eastern boundary currents. Primary productivity depends on oceanic upwelling along the equator and local centers of upwelling and wind mixing in coastal waters. Eastern tropical Pacific surface waters are moderately productive. Phytoplankton productivity is limited by a lack of the micronutrient dissolved iron, except where local coastal processes provide a source, so that macronutrients such as nitrate are never depleted. Seasonal changes in solar forcing, winds, rainfall, surface temperature and salinity, and other environmental characteristics are described, although seasonality in this region is not as pronounced as at higher latitudes. In contrast, interannual variations caused by the El Niño-Southern Oscillation across the entire tropical Indo-Pacific are very important in this region (Chap. 4). Oxygen depletion is extreme below the sharp thermocline, with consequences for mesopelagic and subthermocline benthic organisms. Surface waters are relatively low pH and marginally carbonate-saturated. Climate change is predicted to lead to future oceanographic changes in this region: warming and acidification of surface waters, increased stratification and reduced productivity, and upwelling/mixing of hypoxic waters into the surface layer. These changes are likely to affect organisms and populations living in the eastern tropical Pacific.

Keywords

Hydrography Circulation Productivity Oxygen Climate change 

References

  1. Amador JA, Alfaro EJ, Lizano OG, Magaña VO (2006) Atmospheric forcing of the eastern tropical Pacific: a review. Prog Oceanogr 69(2–4):101–142CrossRefGoogle Scholar
  2. Baskett ML, Nisbet RM, Kappel CV, Mumbey PJ, Gaines SD (2010) Conservation management approaches to protecting the capacity for corals to respond to climate change: a theoretical comparison. Global Change Biol 16:1229–1246CrossRefGoogle Scholar
  3. Bonjean F, Lagerloef GSE (2002) Diagnostic model and analysis of the surface currents in the tropical Pacific Ocean. J Phys Oceanogr 32:2938–2954CrossRefGoogle Scholar
  4. Brenes C, Lavín MF, Mascarenhas A Jr (2008) Geostrophic circulation between the Costa Rica Dome and Central America. Deep-Sea Res I 55:608–629CrossRefGoogle Scholar
  5. Camargo SJ, Robertson AW, Barnston AG, Ghil M (2008) Clustering of eastern North Pacific tropical cyclone tracks: ENSO and MJO effects. Geochem Geophys Geosyst 9(6). doi: 10.1029/2007GC001861
  6. Cao L, Caldeira K (2008) Atmospheric CO2 stabilization and ocean acidification. Geophys Res Lett 35. doi: 10.1029/2008GL035072
  7. Chaigneau, A, Abarca del Río R, Colas F (2006). Lagrangian study of the Panama Bight and surrounding regions. J Geophys Res 111. doi: 10.1029/2006JC003530
  8. Collins M, An S-I, Cai W, Ganachaud A, Guilyardi E, Jin F-F, Jochum M, Lengaigne M, Power S, Timmermann A, Vecchi G, Wittenberg A (2010) The impact of global warming on the tropical Pacific Ocean and El Niño. Nat Geosci 3:391–397CrossRefGoogle Scholar
  9. Cromwell T, Montgomery RB, Stroup ED (1954) Equatorial undercurrent in Pacific Ocean revealed by new methods. Science 119:648–649CrossRefGoogle Scholar
  10. Deser C, Alexander MA, Xie S-P, Phillips AS (2010) Sea surface temperature variability: patterns and mechanisms. Ann Rev Mar Sci 2:115–143CrossRefGoogle Scholar
  11. DiNezio PN, Clement AC, Vecchi GA, Soden BJ, Kirtman BP, Lee S-K (2009) Climate response of the equatorial Pacific to global warming. J Climate 22:4873–4892CrossRefGoogle Scholar
  12. Feely RA, Doney SC, Cooley SR (2009) Present conditions and future changes in a high-CO2 world. Oceanography 22(4):37–47CrossRefGoogle Scholar
  13. Fiedler PC (2002) The annual cycle and biological effects of the Costa Rica Dome. Deep-Sea Res I 49:321–338CrossRefGoogle Scholar
  14. Fiedler PC, Talley LD (2006) Hydrography of the eastern tropical Pacific: a review. Prog Oceanogr 69(2–4):143–180CrossRefGoogle Scholar
  15. Fiedler PC, Mendelssohn R, Palacios DM, Bograd SJ (2013) Pycnocline variations in the eastern tropical and North Pacific, 1958–2008. J Climate 26:583–599CrossRefGoogle Scholar
  16. Glynn PW, Mones AB, Podestá GP, Colbert A, Colgan MW (2016) El Niño-Southern Oscillation: Effects on Eastern Pacific Coral Reefs and Associated Biota. In: Glynn PW et al. (eds) Coral reefs of the eastern tropical Pacific. doi: 10.1007/978-94-017-7499-4_8
  17. Godínez VM, Beier E, Lavín MF, Kurczyn JA (2010) Circulation at the entrance of the Gulf of California from satellite altimeter and hydrographic observations. J Geophys Res 115. doi: 10.1029/2009JC005705
  18. Hastenrath S (1991) Climate dynamics of the tropics. Kluwer, Dordrecht, p 488CrossRefGoogle Scholar
  19. Hoegh-Guldberg O, Mumby PJ, Hooten AJ, Steneck RS, Greenfield P, Gomez E, Harvell CD, Sale PF, Edwards AJ, Caldeira K, Knowlton N, Eakin CM, Iglesias-Prieto R, Muthiga N, Bradbury RH, Dubi A, Hatziolos ME (2007) Coral reefs under rapid climate change and ocean acidification. Science 318:1737–1742CrossRefGoogle Scholar
  20. Huang RX (2010) Ocean circulation: wind-driven and thermohaline processes. Cambridge University Press, Cambridge. Online version available at: http://www.knovel.com/web/portal/browse/display?_EXT_KNOVEL_DISPLAY_bookid=3237
  21. Intergovernmental Panel on Climate Change (2007) Fourth assessment report. http://www.ipcc.ch/publications_and_data/ar4/wg1/
  22. Karstensen J, Stramma L, Visbeck M (2008) Oxygen minimum zones in the eastern tropical Atlantic and Pacific oceans. Prog Oceanogr 77:331–350CrossRefGoogle Scholar
  23. Kessler WS (2002) Mean three-dimensional circulation in the northeast tropical Pacific. J Phys Oceanogr 32:2457–2471CrossRefGoogle Scholar
  24. Kessler WS (2006) The circulation of the eastern tropical Pacific: a review. Prog Oceanogr 69(2–4):181–217CrossRefGoogle Scholar
  25. Kleypas JA, McManus JW, Meñez LAB (1999a) Environmental limits to coral reef development: where do we draw the line? Am Zool 39:146–159CrossRefGoogle Scholar
  26. Kleypas JA, Buddemeier RW, Archer D, Gattuso J-P, Langdon C, Opdyke BN (1999b) Geochemical consequences of increased atmospheric carbon dioxide on coral reefs. Science 284:118–120CrossRefGoogle Scholar
  27. Large WG, Nurser AJG (2001) Ocean surface water mass transformation. In: Siedler G, Church J, Gould J (eds) Ocean circulation and climate: observing and modeling the global ocean. Academic Press, New York, pp 317–336CrossRefGoogle Scholar
  28. Lavín MF, Beier E, Gómez J, Godínez VM, García J (2006) On the summer poleward coastal current off SW México. Geophys Res Lett 33. doi: 10.1029/2005GL024686
  29. Lee S-K, Enfield DB, Wang C (2007) What drives seasonal onset and decay of the Western Hemisphere warm pool? J Climate 20:2133–2146CrossRefGoogle Scholar
  30. Le Quéré C, Raupach MR, Canadell JG, Marland G, Bopp L, Ciais P et al (2009) Trends in the sources and sinks of carbon dioxide. Nat Geosci 2:831–836CrossRefGoogle Scholar
  31. Levin LA (2003) Oxygen minimum zone benthos: adaptation and community response to hypoxia. Oceanogr Mar Biol 41:1–45Google Scholar
  32. Liang J-H, McWilliams JC, Gruber N (2009) High-frequency response of the ocean to mountain gap winds in the northeastern tropical Pacific. J Geophys Res 114. doi: 10.1029/2009JC005370
  33. Lirman D, Glynn PW, Baker AC, Leyte Morales GE (2001) Combined effects of three sequential storms on the Huatulco coral reef tract, Mexico. Bull Mar Sci 69:267–278Google Scholar
  34. Longhurst AR (2007) Ecological geography of the sea, 2nd edn. Academic Press, New York, p 542Google Scholar
  35. Lukas R (1986) The termination of the equatorial undercurrent in the eastern Pacific. Prog Oceanogr 16:63–90CrossRefGoogle Scholar
  36. Madden RA, Julian PR (1994) Observations of the 40–50-day tropical oscillation—a review. Mon Weather Rev 122:814–837CrossRefGoogle Scholar
  37. Maloney ED, Hartmann DL (2000) Modulation of eastern North Pacific hurricanes by the Madden-Julian Oscillation. J Climate 13:1451–1460CrossRefGoogle Scholar
  38. Manzello DP (2009) Reef development and resilience to acute (El Niño warming) and chronic (high-CO2) disturbances in the eastern tropical Pacific: a real-world climate change model, vol 2, pp 1299–1304. In: Proceedings of 11th International Coral Reef Symposium, Ft LauderdaleGoogle Scholar
  39. Manzello DP (2010) Coral growth with thermal stress and ocean acidification: lessons from the eastern tropical Pacific. Coral Reefs 29:749–758CrossRefGoogle Scholar
  40. Manzello DP, Kleypas JA, Budd DA, Eakin CM, Glynn PW, Langdon C (2008) Poorly cemented coral reefs of the eastern tropical Pacific: possible insights into reef development in a high-CO2 world. Proc Natl Acad Sci USA 105:10,450–10,455Google Scholar
  41. Manzello DP, Mark Eakin C, Glynn PW (2016) Effects of Global Warming and Ocean Acidification on Carbonate Budgets of Eastern Pacific Coral Reefs. In: Glynn PW et al. (eds) Coral reefs of the eastern tropical Pacific. doi: 10.1007/978-94-017-7499-4_18
  42. Paulmier A, Ruiz-Pino D (2009) Oxygen minimum zones (OMZs) in the modern ocean. Prog Oceanogr 80:113–128CrossRefGoogle Scholar
  43. Pennington JT, Mahoney KL, Kuwahara VS, Kolber DD, Calienes R, Chavez FP (2006) Primary production in the eastern tropical Pacific: a review. Prog Oceanogr 69(2–4):285–317CrossRefGoogle Scholar
  44. Philander SGH, Gu D, Halpern D, Lambert G, Lau N-C, Li T, Pacanowski RC (1996) Why the ITCZ is mostly north of the equator. J Climate 9:2958–2972CrossRefGoogle Scholar
  45. Raven J, Caldeira K, Elderfield H, Hoegh-Guldberg O, Liss P, Riebesell U, Shepherd J, Turley C, Watson A (2005) Ocean acidification due to increasing atmospheric carbon dioxide. Policy document 12/05, The Royal Society, LondonGoogle Scholar
  46. Risien CM, Chelton DB (2008) A global climatology of surface wind and wind stress fields from eight years of QuikSCAT scatterometer data. J Phys Oceanogr 38:2379–2413CrossRefGoogle Scholar
  47. Romero-Vadillo E, Zaytsev O, Morales-Pérez R (2007) Tropical cyclone statistics in the northeastern Pacific. Atmosfera 20:197–213Google Scholar
  48. Semedo A, Sušelj K, Rutgersson A, Sterl A (2011) A global view on the wind, sea and swell climate and variability from ERA-40. J Climate 24:1461–1479CrossRefGoogle Scholar
  49. Shea TJ, Trenberth KE, Reynolds RW (1992) A global monthly sea surface temperature climatology. J Climate 5:987–1001CrossRefGoogle Scholar
  50. Smith SV, Buddemeier RW (1992) Global change and coral reef ecosystems. Ann Rev Ecol Syst 23:89–118CrossRefGoogle Scholar
  51. Steinacher MF, Joos F, Frölicher TL, Bopp L, Cadule P, Cocco V, Doney SC, Gehlen M, Lindsay K, Moore JK, Schneider B, Segschneider J (2010) Projected 21st century decrease in marine productivity: a multi-model analysis. Biogeosciences 7:979–1005CrossRefGoogle Scholar
  52. Sterl A, Caires S (2005) Climatology, variability and extrema of ocean waves: the web-based KNMI/ERA-40 wave atlas. Int J Climatol 25:963–977CrossRefGoogle Scholar
  53. Stramma L, Johnson GC, Sprintall J, Mohrholz V (2008) Expanding oxygen-minimum zones in the tropical oceans. Science 320:655–658CrossRefGoogle Scholar
  54. Stramma L, Schmidtko S, Levin LA, Johnson GC (2010) Ocean oxygen minima expansions and their biological impacts. Deep-Sea Res I 57:587–595CrossRefGoogle Scholar
  55. Takahashi T, Sutherland SC, Wanninkhof R, Sweeney C, Feely RA, Chipman DW et al (2009) Climatological mean and decadal change in surface ocean pCO2, and net sea–air CO2 flux over the global oceans. Deep-Sea Res II 56:554–577CrossRefGoogle Scholar
  56. Talley LD, Pickard GL, Emery WJ, Swift JH (2011) Descriptive physical oceanography: an introduction, 6th edn. Academic Press, London, p 560Google Scholar
  57. Vecchi GA, Soden BJ (2007) Global warming and the weakening of the tropical circulation. J Climate 20:4316–4340CrossRefGoogle Scholar
  58. Wang B (1994) Climatic regimes of tropical convection and rainfall. J Climate 7:1109–1118CrossRefGoogle Scholar
  59. Wang C, Enfield D (2001) The tropical western hemisphere warm pool. Geophys Res Lett 28:1635–1638CrossRefGoogle Scholar
  60. Willett CS, Leben R, Lavín MF (2006) Eddies and mesoscale processes in the eastern tropical Pacific: a review. Prog Oceanogr 69(2–4):218–238CrossRefGoogle Scholar
  61. Wyrtki K (1964) The thermal structure of the eastern Pacific Ocean. Deut Hydrograph Zeit, Ergänzungsheft A 6:84Google Scholar
  62. Wyrtki K (1966) Oceanography of the eastern equatorial Pacific Ocean. Oceanogr Mar Biol Ann Rev 4:33–68Google Scholar
  63. Wyrtki K (1967) Circulation and water masses in the eastern equatorial Pacific Ocean. Int J Oceanol Limn 1:117–147Google Scholar
  64. Wyrtki K (1981) An estimate of equatorial upwelling in the Pacific. J Phys Oceanogr 11:1205–1214CrossRefGoogle Scholar
  65. Xie L, Hsieh WW (1995) The global distribution of wind-induced upwelling. Fish Oceanogr 4:52–67CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Marine Mammal and Turtle DivisionNOAA/NMFS/Southwest Fisheries Science CenterLa JollaUSA
  2. 2.Departamento de Oceanografía FísicaCentro de Investigación Científica y de Educación Superior de EnsenadaEnsenadaMexico

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