HIRDLS Observations of Cirrus
Abstract
Cirrus is produced in-situ by the freezing of humid layers, blow-off from deep convection, and by production induced by cold temperature perturbations of dynamical waves. We study cirrus near the tropopause that is observed by the HIRDLS experiment and relate the observed cirrus to MLS relative humidity with respect to ice (RHI), CDC outgoing longwave radation (OLR) (which is a proxy for deep convection), and temperature-wave perturbations as determined from HIRDLS temperature profiles. Latitude-longitude maps and Hovmoller diagrams (i.e. longitude versus time for the 10 S to 10 N latitude band) are presented at several pressure levels to relate cirrus to its production mechanisms. The HIRDLS observations are correlated to RHI, OLR, and the temperature perturbations, and discussed.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2008
- Bibcode:
- 2008AGUSM.A53B..04M
- Keywords:
-
- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0320 Cloud physics and chemistry;
- 0340 Middle atmosphere: composition and chemistry