Köppen-Supan line

Köppen-Supan line

[′kep·ən sü′pän ‚līn]
(meteorology)
The isotherm connecting places which have a mean temperature of 10°C (50°F) for the warmest month of the year.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.