Infrared spectra recorded by the interferometric monitoring of greenhouse gases sensor have been analysed to assess the effect of the Molecule CCl3F in the atmospheric window region 800-900 cm(-1). The analysis has been carried out at a sampling rate of 0.25 cm(-1) which is typical of next generation space borne infrared sensors such as the European infrared atmospheric sounding interferometer. It has been found that at this spectral resolution absorption by CCl3F is clearly evident and mostly effective in the spectral range 840-860 cm(-1) where it may account for up to 1 K depletion in the brightness temperature spectrum. It will be shown that a CCl3F concentration of 270 pptv (mixing ratio) fits very well to the spectral observations. Our findings show that chlorofluorocarbons may play an interfering role in determining surface or close to surface geophysical parameters. On the other hand, the fact that these compounds are clearly identifiable in infrared spectra opens the way to an effective monitoring of their presence and abundance from space. (C) 2002 Elsevier Science Ltd. All rights reserved

IMG evidence of chlorofluorocarbon absorption in the atmospheric window region 800-900 cm-1

MASIELLO, Guido;SERIO, Carmine;
2002-01-01

Abstract

Infrared spectra recorded by the interferometric monitoring of greenhouse gases sensor have been analysed to assess the effect of the Molecule CCl3F in the atmospheric window region 800-900 cm(-1). The analysis has been carried out at a sampling rate of 0.25 cm(-1) which is typical of next generation space borne infrared sensors such as the European infrared atmospheric sounding interferometer. It has been found that at this spectral resolution absorption by CCl3F is clearly evident and mostly effective in the spectral range 840-860 cm(-1) where it may account for up to 1 K depletion in the brightness temperature spectrum. It will be shown that a CCl3F concentration of 270 pptv (mixing ratio) fits very well to the spectral observations. Our findings show that chlorofluorocarbons may play an interfering role in determining surface or close to surface geophysical parameters. On the other hand, the fact that these compounds are clearly identifiable in infrared spectra opens the way to an effective monitoring of their presence and abundance from space. (C) 2002 Elsevier Science Ltd. All rights reserved
2002
File in questo prodotto:
File Dimensione Formato  
54961_UPLOAD.pdf

non disponibili

Tipologia: Altro materiale allegato
Licenza: DRM non definito
Dimensione 583.97 kB
Formato Adobe PDF
583.97 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/17392
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
social impact