Journal article

Tropical cirrus and water vapor: an effective Earth infrared iris feedback?

Fu Q, Baker M, Hartmann D ...see all

Atmos. Chem. Phys, vol. 2 (2002) pp. 31-37

  • 42


    Mendeley users who have this article in their library.
  • 7


    Citations of this article.
Sign in to save reference


We revisit a model of feedback processes pro-posed by Lindzen et al. (2001), in which an assumed 22% re-duction in the area of tropical high clouds per degree increase in sea surface temperature produces negative feedbacks as-sociated with upper tropospheric water vapor and cloud ra-diative effects. We argue that the water vapor feedback is overestimated in Lindzen et al. (2001) by at least 60%, and that the high cloud feedback is small. Although not men-tioned by Lindzen et al. (2001), tropical low clouds make a significant contribution to their negative feedback, which is also overestimated. Using more realistic parameters in the model of Lindzen et al. (2001), we obtain a feedback fac-tor in the range of −0.15 to −0.51, compared to their larger negative feedback factor of −0.45 to −1.03. It is noted that our feedback factor could still be overestimated due to the as-sumption of constant low cloud cover in the simple radiative-convective model.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Q Fu

  • M Baker

  • D L Hartmann

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free