Comparison of spectrally resolved outgoing longwave data between 1970 and present

JA Griggs, JE Harries

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)
1951 Downloads (Pure)


Measurements of spectrally resolved outgoing longwave radiation allows signatures of many aspects of greenhouse warming to be distinguished without the need to amalgamate information from multiple measurements, allowing direct interpretation of the error characteristics. Here, data from three instruments measuring the spectrally resolved outgoing longwave radiation from satellites orbiting in 1970, 1997 and 2003 are compared. The data are calibrated to remove the effects of differing resolutions and fields of view so that a direct comparison can be made. Comparisons are made of the average spectrum of clear sky outgoing longwave radiation over the oceans in the months of April, May and June. Difference spectra are compared to simulations created using the known changes in greenhouse gases such as CH4, CO2 and O3 over the time period. This provides direct evidence for significant changes in the greenhouse gases over the last 34 years, consistent with concerns over the changes in radiative forcing of the climate.
Translated title of the contributionComparison of spectrally resolved outgoing longwave radiation between 1970 and present
Original languageEnglish
Pages (from-to)164 - 174
Number of pages11
JournalProceedings of SPIE
Publication statusPublished - Nov 2004

Bibliographical note

Rose publication type: Journal article

Sponsorship: This work was supported by a NERC studentship.

Terms of use: Copyright 2004 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE Volume: 5543 and is made available as an electronic reprint (preprint) with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • outgoing longwave radiation
  • spectrum
  • greenhouse gases
  • simulation
  • infared


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