Bioclimatic law | Article about bioclimatic law by The Free Dictionary
bioclimatic law[¦bī·ō‚klī′mad·ik ′lȯ]
The law which states that phenological events are altered by about 4 days for each 5° change of latitude northward or longitude eastward; events are accelerated in spring and retreat in autumn.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The general rule (officially Hopkins Bioclimatic Law
) is that for each 100-foot gain in elevation, fall colors will arrive a day earlier than below.
To compare the timing of such events at distant locations, Hopkins (1918) proposed his Bioclimatic Law
, a rule-of-thumb formula to measure the average spring delay in days as one travels northward, eastward and upward in elevation.