1 / 12

Introduction into the Absorption Channels

This document provides an introduction to the CO2 absorption channel (13.4 µm) and its significance within the MSG satellite data channels. It outlines the characteristics and content of the CO2 channel, detailing its role in measuring thermal earth radiation. The CO2 channel is crucial for understanding atmospheric properties, including temperature profiles and instability. Furthermore, it presents a comparison of radiation sources from the sun and the Earth, emphasizing the dominance of various wavelengths. For further information, contact Veronika Zwatz-Meise.

indira-michael
Download Presentation

Introduction into the Absorption Channels

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction into the Absorption Channels Description of characteristics and content of the CO2 channel:Ch11: 13.4  Contact person: Veronika Zwatz-Meise zwatz-meise@zamg.ac.at Version 1.0. 13 July 2004

  2. All MSG channels • Channel 01: VIS 0.6  • Channel 02: VIS 0.8  • Channel 03: NIR 1.6  • Channel 04: MIR 3.9  • Channel 05 WV 6.2  • Channel 06: WV 7.3  • Channel 07: IR 8.7  • Channel 08: IR 9.7  („Ozon“) • Channel 09: IR 10.8  • Channel 10: IR 12.0  • Channel 11: IR 13.4 („CO2“) • Chanell 12: HRV (High Resolution Visible)

  3. „CO2 channel“Ch11: 13.4 m

  4. Ch11: 13.4  Sun radiation Earth radiation Watt/ m2 and micron Ozone Carbon dioxid Water vapour Wavelength (micron)

  5. Comparison of radiation sources sun - earth • For wave length < 5 m solar radiation is dominant • For wave length > 5 m radiation of earth is dominant • Ch01, 02, 03, 12: only sun radiation • Ch04: both: radiation from sun and earth • Ch 05, 06, 07, 08, 09, 10, 11: only thermal earth radiation Sun radiation Earth radiation Watt/ m2 and micron only VIS VIS + IR only IR

  6. Ch11 is in the wing of the CO2 absorption band around 15 m Energy spectrum Source:EUMETSAT Ch11

  7. Maximal signal from around 870 hPa Weighting functions Source:EUMETSAT

  8. Maximal signal from around 820 hPa Weighting functions Source:EUMETSAT Figure 3d

  9. Application areas for the CO2 channel • Qualitative application of images: • No additional features compared to the IR window channels • No special application for qualitative image interpretation (at the time being) • Quantitative applications: • temperature profiles • instability • winds

  10. Ch11:13.4

  11. Ch09:10.8

  12. Ch10:12.0

More Related