Longwave radiative forcing of mineral dust: Improvement of its estimation with tools recently developed by the EARLINET community

• Autores: Michael Sicard, Santi Bertolín, Constantino Muñoz, Adolfo Comeron Tejero, Alejandro Rodríguez
• Localización: 2nd Iberian Meeting on Aerosol Science and Technology: Proceedings Book RICTA 2014 / coord. por Jordi Grifoll Taverna, Joan Rosell Llompart, 2014, ISBN 978-84-695-9978-5, pág. 162
• Idioma: inglés
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• Resumen

  • Atmospheric aerosols have a remarkable effect on the Earth-atmosphere radiative budget. Indeed, aerosols and their interactions with clouds contribute to the largest uncertainties in the estimation of the Earth’s changing energy budget. Nowadays many radiative transfer models have been developed to locally estimate the aerosol direct radiative forcing (RF). In the longwave (LW) spectral range, the aerosol radiative properties are usually estimated theoretically with a Mie code. The parameter that contains the absorption and scattering quantities, the extinction coefficient, is normalized to the extinction coefficient in the shortwave spectral range, most of the time in the visible spectral range, or to the number concentration. As measurements of the extinction coefficient or of its integral, the optical thickness, are available in the shortwave spectral range, the equivalent extinction coefficient or optical thickness in the LW spectral range can be deduced thanks to that normalized, theoretical extinction coefficient.