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GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L03706, doi:10.1029/2007GL032546, 2008

Defining the frequency of near-shore tropical cyclone activity in the eastern North Pacific from historical surface observations (1921–2005)

Phil J. Englehart

Department of Atmospheric Science, Creighton University, Omaha, Nebraska, USA


Michael D. Lewis

Department of Atmospheric Science, Creighton University, Omaha, Nebraska, USA


Arthur V. Douglas

Department of Atmospheric Science, Creighton University, Omaha, Nebraska, USA


Abstract

Due in part to limited historical observations, the long-term variability of tropical cyclone (TC) activity in the eastern North Pacific has received little research attention. This paper outlines features of a long-term (1921–2005) data set of TC frequency defined in a manner consistent with the quality and availability of historical surface observations. Simple analyses of the data set point to nonrandom behavior in the TC series and suggest that long period variability is an important component of TC activity.

Received 1 November 2007; accepted 13 December 2007; published 15 February 2008.

Keywords: tropical cyclone activity; eastern North Pacific; historical time series.

Index Terms: 1616 Global Change: Climate variability (1635, 3305, 3309, 4215, 4513); 1637 Global Change: Regional climate change; 3374 Atmospheric Processes: Tropical meteorology.

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Citation: Englehart, P. J., M. D. Lewis, and A. V. Douglas (2008), Defining the frequency of near-shore tropical cyclone activity in the eastern North Pacific from historical surface observations (1921–2005), Geophys. Res. Lett., 35, L03706, doi:10.1029/2007GL032546.