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La luz artificial nocturna extiende la temporada de polen y eleva la exposición a alérgenos
Brandt Geist1, Lin Meng1, Daniel S W Katz2
1Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, USA.
PNAS nexus
|January 22, 2026
Resumen
La luz artificial nocturna (ALAN) extiende significativamente las temporadas de polen, lo que lleva a un aumento de los riesgos de alergia. Este estudio muestra que ALAN adelanta el inicio de la temporada de polen y retrasa su final, empeorando la exposición a alérgenos.
Área de la Ciencia:
- Ciencias Ambientales
- Ecología
- Salud Pública
Sus antecedentes:
- La luz artificial nocturna (ALAN) es un factor estresante ambiental emergente en las áreas urbanas.
- ALAN interrumpe los ciclos naturales de luz y oscuridad, afectando la fenología de las plantas.
- Su impacto en el momento de la temporada de polen y los riesgos de alergia está poco estudiado.
Objetivo del estudio:
- Investigar la influencia de ALAN en el momento y la duración de la temporada de polen en el aire.
- Evaluar las consecuencias de la exposición al polen alergénico inducida por ALAN.
- Explorar la relación entre ALAN, el clima y las métricas de la temporada de polen.
Principales métodos:
- Se utilizaron datos diarios de polen del National Allergy Bureau (2012-2023).
- Se incorporaron datos de ALAN del Visible Infrared Imaging Radiometer Suite.
- Se emplearon datos climáticos gridded de Daymet para analizar el inicio, el final y la duración de la temporada de polen.
Principales resultados:
- Una mayor exposición a ALAN se correlacionó con un inicio más temprano de la temporada de polen, un final más tardío y una mayor duración.
- El efecto de ALAN en el final de la temporada fue más pronunciado que en el inicio de la temporada.
- Los sitios expuestos a ALAN tuvieron más días y mayor gravedad de exposición al polen alergénico.
Conclusiones:
- ALAN altera significativamente la dinámica de la temporada de polen, extendiendo la duración de la exposición.
- El aumento de la exposición al polen alergénico debido a ALAN puede exacerbar los problemas de salud relacionados con las alergias.
- ALAN debe considerarse en la planificación urbana y las estrategias de salud pública para el manejo de alergias.
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