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Explaining the nine planetary boundaries | Environment

A run down of how scientists can quantify the state of the world ....

United Kingdom , Johan Rockstr , Stockholm Resilience Centre , Biosphere Integrity , Million Species , Intactness Index , Aerosol Loading , Novel Entities , Chemical Pollution , Montreal Protocol ,

"Measurement report: Observations of long-lived volatile organic compou" by Asher P. Mouat, Clare Paton-Walsh et al.

In 2019-2020, Australia experienced its largest wildfire season on record. Smoke covered hundreds of square kilometers across the southeastern coast and reached the site of the COALA-2020 (Characterizing Organics and Aerosol Loading over Australia) field campaign in New South Wales. Using a subset of nighttime observations made by a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS), we calculate emission ratios (ERs) and factors (EFs) for 15 volatile organic compounds (VOCs). We restrict our analysis to VOCs with sufficiently long lifetimes to be minimally impacted by oxidation over the ∼8 h between when the smoke was emitted and when it arrived at the field site. We use oxidized VOC to VOC ratios to assess the total amount of radical oxidation: maleic anhydride / furan to assess OH oxidation, and (cis-2-butenediol + furanone) / furan to assess NO3 oxidation. We examine time series of O3 and NO2 given their closely linked chemistry with wildfire plumes and observ ....

Characterizing Organics , Aerosol Loading , New South ,