Articles | Volume 20, issue 17
Atmos. Chem. Phys., 20, 10231–10258, 2020
Atmos. Chem. Phys., 20, 10231–10258, 2020

Research article 04 Sep 2020

Research article | 04 Sep 2020

A global model–measurement evaluation of particle light scattering coefficients at elevated relative humidity

María A. Burgos et al.

Data sets

Aerosol optical properties from ten earth system models for the year 2010 María A. Burgos, Elisabeth J. Andrews, Gloria Titos, Angela Benedetti, Huisheng Bian, Virginie Buchard, Gabriele Curci, Alf Kirkevåg, Harri Kokkola, Anton Laakso, Marianne T. Lund, Hitoshi Matsui, Gunnar Myhre, Cynthia Randles, Twan van Noije, Kai Zhang, and Paul Zieger

Aerosol light scattering coefficients and scattering enhancement factors at 26 globally distributed stations 1998⁠ – ⁠2017 María A. Burgos, Elisabeth Andrews, Gloria Titos, Lucas Alados-Arboledas, Urs Baltensperger, Derek Day, Anne Jefferson, Nikos Kalivitis, Nikos Mihalopoulos, James Sherman, Junying Sun, Ernest Weingartner, and Paul Zieger

Short summary
We investigate how well models represent the enhancement in scattering coefficients due to particle water uptake, and perform an evaluation of several implementation schemes used in ten Earth system models. Our results show the importance of the parameterization of hygroscopicity and model chemistry as drivers of some of the observed diversity amongst model estimates. The definition of dry conditions and the phenomena taking place in this relative humidity range also impact the model evaluation.
Final-revised paper