DETERMINISTIC SIGNALS IN EUROPEAN FISH CATCHES, WINE HARVESTS, AND SEA-LEVEL, AND FURTHER EXPERIMENTS

Citation
Rg. Currie et al., DETERMINISTIC SIGNALS IN EUROPEAN FISH CATCHES, WINE HARVESTS, AND SEA-LEVEL, AND FURTHER EXPERIMENTS, International journal of climatology, 13(6), 1993, pp. 665-687
Citations number
86
Categorie Soggetti
Metereology & Atmospheric Sciences
ISSN journal
08998418
Volume
13
Issue
6
Year of publication
1993
Pages
665 - 687
Database
ISI
SICI code
0899-8418(1993)13:6<665:DSIEFC>2.0.ZU;2-4
Abstract
Maximum entropy spectrum analysis of six fish catch series seven serie s giving dates of wine harvest, and forty four height of sea-level rec ords from Europe yields evidence for two. peaks with periods 18-19 and 10-11 years, the same terms recently reported in European tree-ring c hronologies. For each series the two wavetrains are obtained by bandpa ss filters, summed, superimposed on the trend-like components of the r aw data, and plotted against the raw data. The contribution, on averag e, of the waves to total variance in the raw data varies from a high o f 50 per cent for fish catches to a low of 14 per cent for dates of wi ne harvest (the mean contribution for height of sea-level is 18 per ce nt). The peaks are identified as the 18.6-year luni-solar, M(n), and 1 0-11-year solar cycle, S(c), signals, which also have been reported re cently in other climate variables, such as air temperature, air pressu re, in rain-gauge and tree-ring data from North and South America, Sou th Africa, Tasmania, and New Zealand: and in sea-surface temperature a s well as in American crop yield and other economic data. Further expe riments show that with 110 years, or more, of data the Yule-Walker met hod of spectrum analysis has sufficient resolution to resolve both sig nals. It is also shown that failure to apply a properly designed digit al high-pass filter to climate records prior to spectrum analysis usua lly leads to failure in detecting the terms.