Significance of the organic aerosol driven climate feedback in the boreal area

• DOI: 10.1038/s41467-021-25850-7
• Publication Date: 2021-10-12T12:05:45Z
• Authors: Taina Yli-Juuti; Tero Mielonen; Liine Heikkinen; Antti Arola; Mikael Ehn; Sini Isokääntä; Helmi-Marja Keskinen; Markku Kulmala; Anton Laakso; Antti Lipponen; Krista Luoma; Santtu Mikkonen; Tuomo Nieminen; Pauli Paasonen; Tuukka Petäjä; Sami Romakkaniemi; Juha Tonttila; Harri Kokkola; Annele Virtanen
• Keywords: Cloud condensation nuclei; Sea salt aerosol

Abstract Aerosol particles cool the climate by scattering solar radiation and acting as cloud condensation nuclei. Higher temperatures resulting from increased greenhouse gas levels have been suggested to lead biogenic secondary organic aerosol nuclei concentrations creating a negative feedback mechanism. Here, we present direct observations on this mechanism utilizing collocated long term chemical composition measurements remote sensing properties. Summer time loadings showed clear increase with temperature, simultaneous in concentration boreal forest environment. Remote revealed change properties an reflectivity concert increasing area. The results provide observational evidence significance of