El Ni%c3%b1o%e2%80%93southern Oscillation

Famous quotes containing the word oscillation:

    In almost all climes the tortoise and the frog are among the precursors and heralds of this season, and birds fly with song and glancing plumage, and plants spring and bloom, and winds blow, to correct this slight oscillation of the poles and preserve the equilibrium of nature.
    Henry David Thoreau (1817–1862)