1976 step in the Pacific climate: forty environmental changes between 1968-1975 and 1977-1984

Ebbesmeyer, Curtis C. and Cayan, Daniel R. and McLain, Douglas R. and Nichols, Frederic H. and Peterson, David H. and Redmond, Kelly T. (1991) 1976 step in the Pacific climate: forty environmental changes between 1968-1975 and 1977-1984. In: Seventh Annual Pacific Climate (PACLIM) Workshop , 10-13 April 1990 ,Asilomar Conference Center, Pacific Grove, CA, pp. 115-126.

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Abstract

Examination of 40 time series of multidisciplinary environmental variables from the Pacific Ocean and the Americas, collected in 1968 to 1984, demonstrated the remarkable consistency of a major climate-related, step-like change in 1976. To combine the 40 variables (e.g., air and water temperatures, Southern Oscillation, chlorophyll, geese, salmon, crabs, glaciers, atmospheric dust, coral, carbon dioxide, winds, ice cover, Bering Strait transport) into a single time series, standard variants of individual annual values (subtracting the mean and dividing by a standard deviation) were averaged. Analysis of the resulting time series showed that the single step in 1976, separating the 1968-1975 period from the 1977-1984 period, accounted for 89% of variance within the composite time series. Apparently, one of the Earth's large ecosystems occasionally undergoes large abrupt shifts.

Item Type: Conference or Workshop Item
Title: 1976 step in the Pacific climate: forty environmental changes between 1968-1975 and 1977-1984
Personal Creator/Author:
CreatorsEmail
Ebbesmeyer, Curtis C.
Cayan, Daniel R.
McLain, Douglas R.
Nichols, Frederic H.
Peterson, David H.
Redmond, Kelly T.
Page Range: pp. 115-126
Date: 1991
Event Title: Seventh Annual Pacific Climate (PACLIM) Workshop
Event Type: Workshop
Event Location: Asilomar Conference Center, Pacific Grove, CA
Event Dates: 10-13 April 1990
Uncontrolled Keywords: PACLIM
Subjects: Atmospheric Sciences
Ecology
Oceanography
Earth Sciences
Environment
Item ID: 4562
Depositing User: Ms Debra Losey
Date Deposited: 18 Nov 2010 12:26
Last Modified: 10 Nov 2014 21:58
URI: http://aquaticcommons.org/id/eprint/4562

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