IR remote sensing of non-LTE atmosphere

Yuriy M. Timofeyev; Vladimir S. Kostsov

doi:10.1117/12.454462

31 January 2002 IR remote sensing of non-LTE atmosphere

Yuriy M. Timofeyev, Vladimir S. Kostsov

Proceedings Volume 4539, Remote Sensing of Clouds and the Atmosphere VI; (2002) https://doi.org/10.1117/12.454462
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

Abstract

The overview of different approaches to the problem of remote sensing of the non-LTE atmosphere by satellite instruments working in the infrared region is presented. Special emphasis is made on the approach, which does not require modeling of the processes driving the nonequilibrium populations of the molecular vibrational states. The method of simultaneous retrieval of kinetic temperature, pressure, concentration of atmospheric gases and nonequilibrium populations of the vibrational states of molecules of atmospheric gases (vibrational temperatures) from the high altitude limb infrared radiance measurements in 15 micrometers region is described. The results of the application of this method to the interpretation of the limb radiance spectra measured by the CRISTA instrument are presented. The kinetic temperature profiles derived in the altitude range 40 - 120 km are shown and the features of the thermal structure of this atmospheric region are compared with climatological data. The magnitude of the non-LTE effect for the CO₂ vibrational states which give origin to 15 micrometers transitions is analyzed on the basis of retrieved CO₂ vibrational temperatures. The vertical distributions of the CO₂ volume mixing ratio in the mesosphere and lower thermosphere derived from the CRISTA measurements are presented and compared with model data. The problem of the influence of the amount of a priori information on the retrieval results is discussed on the basis of calculations of the information content by the Shannon approach.

Citation Download Citation

Yuriy M. Timofeyev and Vladimir S. Kostsov "IR remote sensing of non-LTE atmosphere", Proc. SPIE 4539, Remote Sensing of Clouds and the Atmosphere VI, (31 January 2002); https://doi.org/10.1117/12.454462

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available