Abstract. Brown carbon (BrC) associated with aerosol particles in western United States wildfires was measured between July and August 2019 aboard the NASA DC-8 research aircraft during Fire Influence on Regional to Global Environments Air Quality (FIREX-AQ) study. Two BrC measurement methods are investigated, highly spectrally resolved light absorption solvent (water methanol) extracts of coll...

Despite lower-than-average total precipitation in the western states of U.S., 2021 “precipitation roller coaster” defined as large swings has pointed to a strong hydroclimatic intensity. Here we examine intensity using an index (HYINT) - product average (INT) and dry spell length (DSL). HYINT exhibited extremely high value U.S. 2021. INT DSL contribute differently HYINT, with spatial variabilit...