Climate Dynamics

, Volume 9, Issue 6, pp 303–319 | Cite as

Decadal atmosphere-ocean variations in the Pacific

  • Kevin E Trenberth
  • James W Hurrell


Considerable evidence has emerged of a substantial decade-long change in the north Pacific atmosphere and ocean lasting from about 1976 to 1988. Observed significant changes in the atmospheric circulation throughout the troposphere revealed a deeper and eastward shifted Aleutian low pressure system in the winter half year which advected warmer and moister air along the west coast of North America and into Alaska and colder air over the north Pacific. Consequently, there were increases in temperatures and sea surface temperatures (SSTs) along the west coast of North America and Alaska but decreases in SSTs over the central north Pacific, as well as changes in coastal rainfall and streamflow, and decreases in sea ice in the Bering Sea. Associated changes occurred in the surface wind stress, and, by inference, in the Sverdrup transport in the north Pacific Ocean. Changes in the monthly mean flow were accompanied by a southward shift in the storm tracks and associated synoptic eddy activity and in the surface ocean sensible and latent heat fluxes. In addition to the changes in the physical environment, the deeper Aleutian low increased the nutrient supply as seen through increases in total chlorophyll in the water column, phytoplankton and zooplankton. These changes, along with the altered ocean currents and temperatures, changed the migration patterns and increased the stock of many fish species. A north Pacific (NP) index is defined to measure the decadal variations, and the temporal variability of the index is explored on daily, annual, interannual and decadal time scales. The dominant atmosphere-ocean relation in the north Pacific is one where atmospheric changes lead SSTs by one to two months. However, strong ties are revealed with events in the tropical Pacific, with changes in tropical Pacific SSTs leading SSTs in the north Pacific by three months. Changes in the storm tracks in the north Pacific help to reinforce and maintain the anomalous circulation in the upper troposphere. A hypothesis is put forward outlining the tropical and extratropical realtionships which stresses the role of tropical forcing but with important feed-backs in the extratropics that serve to emphasize the decadal relative to interannual time scales. The Pacific decadal timescale variations are linked to recent changes in the frequency and intensity of El Niño versus La Nina events but whether climate change associated with “global warming” is a factor is an open question.


Latent Heat Flux Storm Track Decadal Time Scale Interannual Time Scale Surface Wind Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Alexander M (1992a) Midlatitude atmosphere-ocean interaction during El Nino. I. The North Pacific Ocean. J Clim 5:944–958Google Scholar
  2. Alexander M (1992b) Midlatitude atmosphere-ocean interaction during El Nino. 11. The Northern Hemisphere atmosphere. J Clim 5:959–972CrossRefGoogle Scholar
  3. Bakun A (1990) Global climate change and intensification of coastal ocean upwelling. Science 247:198–201Google Scholar
  4. Barnett TP (1985) Variations in near global sea level pressure. J Atmos Sci 42:478–501CrossRefGoogle Scholar
  5. Barnett TP, Dümenil K, Schlese U, Roeckner E, Latif M (1989) The effect of Eurasian snow cover on regional and global climate variations. J Atmos Sci 46:661–685CrossRefGoogle Scholar
  6. Bjerknes J (1969) Atmospheric teleconnections from the equatorial Pacific. Mon Weather Rev 97:163–172Google Scholar
  7. Blackmon ML, Geisler JE, Pitcher EJ (1983) A general circulation model study of January climate anomaly patterns associated with interannual variation of equatorial Pacific sea surface temperatures. J Atmos Sci 40:1410–1425Google Scholar
  8. Bottomley M. Folland CK, Hsiung J, Newell RE, Parker DE (1990) Global ocean surface temperature atlas. The UK Meteorological OfficeGoogle Scholar
  9. Branstator G (1987) A striking example of the atmosphere's leading traveling mode. J Atmos Sci 44:2310–2323Google Scholar
  10. Branstator G (1992) The maintenance of low-frequency atmospheric anomalies. J Atmos Sci 49:1924–1945Google Scholar
  11. Cayan DR (1992) Latent and sensible heat flux anomalies over the northern oceans: the connection to monthly atmospheric circulation. J Clim 5:354–369CrossRefGoogle Scholar
  12. Cayan DR, Peterson DH (1989) The influence of north Pacific atmospheric circulation on streamflow in the West. Geophys Monogr 55, Am Geophys Union 375–397Google Scholar
  13. Chelliah M, Arkin P (1992) Large-scale variability of monthly outgoing longwave radiation anomalies over the global tropics. J Clim 5:371–389Google Scholar
  14. Davis R (1976) Predictability of sea surface temperature and sea level pressure anomalies over the north Pacific Ocean. J Phys Oceanogr 6:249–266Google Scholar
  15. Davis R (1978) Predictability of sea-level pressure anomalies over the north Pacific Ocean. J Phys Oceanogr 8:233–246Google Scholar
  16. Dickson RR, Namias J (1976) North American influences on the circulation and climate of the North American sector. Mon Weather Rev 104:1255–1265Google Scholar
  17. Douglas AV, Cayan DR, Namias J (1982) Large-scale changes in north Pacific and North American weather patterns in recent decades. Mon Weather Rev 112:1851–1862Google Scholar
  18. Dowton MW, Miller KA (1993) The freeze risk to Florida citrus. II: Temperature variability and circulation patterns. J Clim 6:364–372Google Scholar
  19. Ebbesmeyer C, Cayan DR, McLain DR, Nichols FH, Peterson DH, Redmond KT (1991) 1976 step in the Pacific climate: forty environmental changes between (1968–1975 and 1977–1984). In: Betancourt JL, Sharp VL (eds) Proc. Seventh Ann. Pacific Climate (PACLIM) Wkshp, April (1990). California Department of Water Resources Interagency Ecological Studies Program Tech. Rep. 26. 129–141Google Scholar
  20. Frankignoul C (1985) Sea surface temperature anomalies, planetary waves, and air-sea feed-backs in middle latitudes. Rev Geophys 8:233–246Google Scholar
  21. Gaffen DJ, Barnett TP, Elliott WP (1991) Space and time scales of global tropospheric moisture. J Clim 4:989–1008Google Scholar
  22. Hamilton K (1987) Interannual environmental variation and North American fisheries. Bull Am Meteorol Soc 68:1541–1548Google Scholar
  23. Held IM, Lyons SW, Nigam S (1989) Transients and the extratropical response to El Nino. J Atmos Sci 46:163–174Google Scholar
  24. Hellerman S, Rosenstein M (1983) Normal monthly wind stress over the world ocean with error estimates. J Phys Oceanogr 17:1093–1104Google Scholar
  25. Hense A, Krahe P, Flohn H (1988) Recent fluctuations of tropospheric temperature and water vapour content in the tropics. Meteorol Atmos Phys 38:215–227Google Scholar
  26. Hotel JD, Wallace JM (1981) Planetary-scale atmospheric phenomena associated with the Southern Oscillation. Mon Weather Rev 109:813–829Google Scholar
  27. Hoskins BJ, James IN, White GH (1983) The shape, propagation and mean-flow interaction of large-scale weather systems. J Atmos Sci 40:1595–1612Google Scholar
  28. IPCC (1990) Scientific assessment of climate change. IPCC WG I, WMO, UNEP. Houghton JT, Jenkins GJ, Ephraums JJ (eds) Cambridge U Press, Cambridge, UKGoogle Scholar
  29. IPCC (1992) Climate Change (1992) Houghton ST, Callander BA, Varney SK (eds) Cambridge U Press, Cambridge, UKGoogle Scholar
  30. Jones PD (1988) Hemispheric surface air temperature variations: recent trends and an up-date to 1987. J Clim 1:654–660Google Scholar
  31. Kok CJ, Opsteegh JD (1985) Possible causes of anomalies in seasonal mean circulation patterns during the 1982–83 El Nino event. J Atmos Sci 42:677–694Google Scholar
  32. Kushnir Y (1987) Retrograding winter time low-frequency disturbances over the north Pacific Ocean. J Atmos Sci 44:2727–2742Google Scholar
  33. Kushnir Y, Lau NC (1992) The general circulation model response to a north Pacific SST anomaly: dependence on time scale and pattern polarity. J Clim 5:271–283Google Scholar
  34. Lanzante JR (1984) A rotated eigenanalysis of the correlation between 700-mb heights and sea surface temperatures in the Pacific and Atlantic. Mon Weather Rev 112:2270–2280Google Scholar
  35. Lau N-C (1979) The observed structure of tropospheric stationary waves and the local balances of vorticity and heat. J Atmos Sci 36:996–1016Google Scholar
  36. Lau N-C (1988) Variability of the observed midlatitude storm tracks in relation to low frequency changes in the circulation pattern. J Atmos Sci 45:2718–2743Google Scholar
  37. Lau N-C, Holopainen EO (1984) Transient eddy forcing of the time mean flow as identified by geopotential tendencies. J Atmos Sci 41:313–328Google Scholar
  38. Lau N-C, Nath MJ (1990) A general circulation model study of the atmospheric response to extratropical SST anomalies observed in 1950–79. J Clim 3:965–989Google Scholar
  39. Lau N-C, Wallace JM (1979) On the distribution of horizontal transports by transient eddies in the Northern Hemisphere winter time circulation. J Atmos Sci 36:1844–1861Google Scholar
  40. Leathers DJ, Palecki MA (1992) The Pacific/North American teleconnection pattern and United States climate. II: Temporal characteristics and index specification. J Clim 5:707–716Google Scholar
  41. Madden RA, Speth P (1989) The average behavior of large-scale westward traveling disturbances evident in the Northern Hemisphere geopotential heights. J Atmos Sci 46:3225–3239Google Scholar
  42. Manak DK, Mysak LA (1987) Climatic atlas of arctic sea ice extent and anomalies 1953-1984. Climate Research Group Report 87-8Google Scholar
  43. McFarlane GA, Beamish RJ (1992) Climatic influence linking Copepod production with strong year-classes in sablefish, Anoplopoma fimbria. Can J Fish Aquat Sci 49:743–753Google Scholar
  44. Meehl GA, Branstator GW, Washington WM (1993) Tropical Pacific interannual variability and CO2 climate change. J Clim 6:42–63CrossRefGoogle Scholar
  45. Mysak LA (1986) El Nino, interannual variability and fisheries in the northeast Pacific Ocean. Can J Fish Aquat Sci 43:464–497Google Scholar
  46. Namias J (1959) Recent seasonal interactions between north Pacific waters and the overlying atmospheric circulation. J Geophys Res 64:631–646Google Scholar
  47. Namias J (1963) Large-scale air-sea interactions over the north Pacific from summer (1962) through the subsequent winter. J Geophys Res 68:6171–6186Google Scholar
  48. Namias J (1969) Seasonal interactions between the north Pacific Ocean and the atmosphere during the 1960s. Mon Weather Rev 97:173–192Google Scholar
  49. Namias J, Yuan X, Cayan DR (1988) Persistence of north Pacific sea surface temperature and atmospheric flow patterns. J Clim 1:682–703Google Scholar
  50. Nitta T Yamada S (1989) Recent warming of tropical sea surface temperature and its relationship to the Northern Hemisphere circulation. J Meteorol Soc Japan 67:375–383Google Scholar
  51. Philander SGH (1992) Ocean-atmosphere interactions in the tropics: A review of recent theories and models. J Appl Meteorol 31:938–945Google Scholar
  52. Rasmusson EM, Carpenter TH (1982) Variations in tropical sea surface temperature and surface wind fields associated with the Southern Oscillation/El Nino. Mon Weather Rev 110:354–384CrossRefGoogle Scholar
  53. Rogers JC, Rohli RV (1991) Florida citrus freezes and polar anticyclones in the Great Plains. J Clim 4:1103–1113Google Scholar
  54. Rogers JC, Raphael MN (1992) Meridional eddy sensible heat fluxes in the extremes of the Pacific/North American teleconnection pattern. J Clim 5:127–139Google Scholar
  55. Royer TC (1989) Upper ocean temperature variability in the northeast Pacific Ocean: is it an indicator of global warming? J Geophys Res 94:18175–18183Google Scholar
  56. Salmon DK (1992) On interannual variability and climate change in the north Pacific. Ph D Thesis. Univ of Alaska, USAGoogle Scholar
  57. Sekine Y (1988) Anomalous intrusion of the Oyashio east of Japan. I. Influence of the interannual and seasonal variations in the wind stress over the north Pacific. J Geophys Res 93:2247–2255PubMedGoogle Scholar
  58. Ting M (1991) The stationary wave response to a midlatitude SST anomaly in an idealized GCM. J Atmos Sci 48:1249–1275Google Scholar
  59. Ting M, Held IM (1990) The stationary wave response to a tropical SST anomaly in an idealized GCM. J Atmos Sci 47:2546–2566Google Scholar
  60. Trenberth KE (1976) Spatial and temporal variations of the Southern Oscillation. Q J R Meteorol Soc 12:639–653Google Scholar
  61. Trenberth KE (1984) Signal versus noise in the Southern Oscillation. Mon Weather Rev 112:326–332Google Scholar
  62. Trenberth KE (1987) The role of eddies in maintaining the westerlies in the Southern Hemisphere winter. J Atmos Sci 44:1498–1508Google Scholar
  63. Trenberth KE (1990) Recent observed interdecadal climate changes in the Northern Hemisphere. Bull Am Meteorol Soc 71:988–993Google Scholar
  64. Trenberth KE (1991a) Recent climate changes in the Northern Hemisphere. DOE Workshop, 8–12 May (1989, Amherst, Mass. In: Schlesinger M (ed) Greenhouse-gas-induced climate change: a critical appraisal of simulations and observations. Elsevier, Amsterdam, pp 377–390Google Scholar
  65. Trenberth KE (1991b) Storm tracks in the Southern Hemisphere. J Atmos Sci 48:2159–2178Google Scholar
  66. Trenberth KE, Branstator GW (1992) Issues in establishing causes of the 1988 drought over North America. J Clim 5:159–172Google Scholar
  67. Trenberth KE, Paolino DA (1980) The Northern Hemisphere sea-level pressure data set: Trends, errors, and discontinuities. Mon Weather Rev 108:855–872Google Scholar
  68. Trenberth KE, Paolino DA (1981) Characteristic patterns of variability of sea level pressure in the Northern Hemisphere. Mon Weather Rev 109:1169–1189Google Scholar
  69. Trenberth KE, Shea DJ (1987) On the evolution of the Southern Oscillation. Mon Weather Rev 115:3078–3096Google Scholar
  70. Trenberth KE, Branstator GW, Arkin PA (1988) Origins of the 1988 North American drought. Science 242:1640–1645Google Scholar
  71. Trenberth KE, Olson JG, Large WG (1989) A global ocean wind stress climatology based on ECMWF analyses. NCAR Tech Note NCAR/TN-338-STRGoogle Scholar
  72. Trenberth KE, Christy JR, Hurrell JW (1992) Monitoring global monthly mean surface temperatures. J Clim 5:1406–1423Google Scholar
  73. van Loon H (1979) The association between latitudinal temperature gradient and eddy transport. I: Transport of sensible heat in winter. Mon Weather Rev 107:525–534Google Scholar
  74. Venrick EL, McGowan JA, Cayan DA, Hayward TL (1987) Climate and chlorophyll a: long-term trends in the central north Pacific Ocean. Science 238:70–72Google Scholar
  75. Wallace JM, Gutzler DS (1981) Teleconnections in the geopotential height field during the Northern Hemisphere winter. Mon Weather Rev 109:784–812CrossRefGoogle Scholar
  76. Wallace JM, Smith C, Jiang Q (1990) Spatial patterns of atmosphere-ocean interaction in the northern winter. J Clim 3:990–998CrossRefGoogle Scholar
  77. Wright PB, Wallace JM, Mitchell TP, Deser C (1988) Correlation structure of the El Nino/Southern Oscillation phenomenon. J Clim 1:609–625Google Scholar
  78. Yamagata T, Masumoto Y (1992) Interdecadal natural climate variability in the western Pacific and its implication in global warming. J Meteorol Soc Japan 70:167–175Google Scholar
  79. Yamazaki K (1989) A study of the impact of soil moisture and surface albedo changes on global climate using the MRI GCM-1. J Meteorol Soc Japan 67:123–146Google Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Kevin E Trenberth
    • 1
  • James W Hurrell
    • 1
  1. 1.National Center for Atmospheric ResearchBoulderUSA

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