TITLE:
Temperature-Profile/Lapse-Rate Feedback: A Misunderstood Feedback of the Climate System
AUTHORS:
Michael E. Schlesinger, C. Bruce Entwistle, Bin Li
KEYWORDS:
Climate Feedback; Feedback Analysis; Lapse-Rate Feedback
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.2 No.4,
November
2,
2012
ABSTRACT: This study shows that the heretofore assumed condition for no temperature-profile (TP)/lapse-rate feedback, for all altitudes z, or , in fact yields a negative feedback. The correct condition for no TP feedback is for all z, where Ts is the surface temperature. This condition translates into a uniform increase (decrease) in lapse rate with altitude for an increase (decrease) in Ts. The temperature changes caused by a change in solar irradiance and/or planetary albedo satisfy the condition for no TP feedback. The temperature changes caused by a change in greenhouse gas concentration do not satisfy the condition for no TP feedback and, instead, yield a positive feedback.