Recently Published Research

Nationwide Speciated Particulate Monitoring – IMPROVE and CSN at UC Davis

Overview

The Air Quality Monitoring Team (AQMT) at UC Davis has operated the Interagency Monitoring of Protected Visual Environments (IMPROVE) ambient speciated particulate monitoring network since its inception in 1988. Beginning in 2015, AQMT took on the laboratory analysis and data handling for the Chemical Speciation Network (CSN). These two networks encompass over 300 sites delivering over 60 PM2.5 species across the country every third day.

Do Not Steal.

Introduction

In the narrative of the “Tragedy of the Commons”,(1,2) a shared grazing area (aka common pool resource(3)) is trampled into overgrazed ruin by a pervasion of actors who exploit the resource more quickly than can be sustainably allotted. Regardless of whether there is consciousness of guilt, this is theft.

Intercomparison of thermal–optical carbon measurements by Sunset and Desert Research Institute (DRI) analyzers using the IMPROVE_A protocol

New research from Xiaolu Zhang, Krystyna Trzepla, Warren White, Sean Raffuse, and Nicole Pauly Hyslop

Thermal–optical analysis (TOA) is a class of methods widely used for determining organic carbon (OC) and elemental carbon (EC) in atmospheric aerosols collected on filters. Results from TOA vary not only with differences in operating protocols for the analysis, but also with details of the instrumentation with which a given protocol is carried out.

Air quality post-pandemic didn't improve as previously suspected

Roy Harrison, a researcher and professor at the University of Birmingham, UK, recently conducted a study to review the reductions in PM 2.5 and NO2 levels that resulted from the COVID-19 pandemic lockdowns over 11 cities. Harrison applied machine learning techniques to remove the effects of weather on the gaseous concentrations to see how the air quality had truly changed due to the lockdowns.