A spectral perspective of the clear-sky OLR variability driven by ENSO

Taddia, Martina; Fabiano, Federico; Della Fera, Stefano; Castelli, Elisa; Dinelli, Bianca Maria

doi:10.5194/acp-26-5293-2026

Articles | Volume 26, issue 8

https://doi.org/10.5194/acp-26-5293-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-5293-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 8

Research article

|

21 Apr 2026

Research article |

| 21 Apr 2026

A spectral perspective of the clear-sky OLR variability driven by ENSO

Martina Taddia, Federico Fabiano, Stefano Della Fera, Elisa Castelli, and Bianca Maria Dinelli

Data sets

CERES Energy Balanced and Filled (EBAF) TOA Monthly means data in netCDF Edition4.1 NASA/LARC/SD/ASDC https://doi.org/10.5067/TERRA-AQUA/CERES/EBAF-TOA_L3B004.1

Aqua AIRS Level 3 Spectral Outgoing Longwave Radiation (OLR) Monthly X. Huang https://doi.org/10.5067/5P7KQ31XI7XJ

IASI-FT spectrally resolved Outgoing Longwave Radiation (from IASI/Metop-A, B and C) S. Whitburn https://doi.org/10.21413/IASI-FT_METOPA_OLR_L3_ULB-LATMOS

ERA5 monthly averaged data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.6860a573

Spectral Kernel S. Della Fera https://doi.org/10.5281/zenodo.15487604

Short summary

The evolution of the climate system is strictly related to its radiative response to changes in surface and atmospheric processes. Through the analysis of the Earth’s emission spectrum measured by satellite instruments, we show that the radiative response to El-Niño Southern Oscillation is wavenumber-dependent, highlighting the role of key climate variables. This makes this analysis particularly suitable for climate models evaluations.