A5072370200- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- COVID-19 impact on air quality
- Vehicle emissions and performance
- Impact of Light on Environment and Health
- Climate Change and Health Impacts
- Analytical Chemistry and Chromatography
- Wind and Air Flow Studies
- Advanced Chemical Sensor Technologies
- Climate variability and models
- Heavy metals in environment
- Stock Market Forecasting Methods
- Historical Astronomy and Related Studies
- Odor and Emission Control Technologies
- Water Quality Monitoring and Analysis
- Pharmaceutical and Antibiotic Environmental Impacts
- Noise Effects and Management
- Analytical chemistry methods development
- Spectroscopy and Laser Applications
- Diverse Historical and Scientific Studies
- Various Chemistry Research Topics
University of Chile
2003-2024
Center for Climate and Resilience Research
2020-2024
University of California, Los Angeles
2013-2016
Universidad Internacional
2014
Fundación Chile
2003-2011
In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database global surface ozone observations has been developed and populated with hourly measurement data enhanced metadata. A comprehensive suite products including standard statistics, health vegetation impact metrics, trend information, are made available through common portal web interface. These form basis TOAR analyses focusing on human health, vegetation, climate relevant issues, which part this special...
This global study, which has been coordinated by the World Meteorological Organization Global Atmospheric Watch (WMO/GAW) programme, aims to understand behaviour of key air pollutant species during COVID-19 pandemic period exceptionally low emissions across globe. We investigated effects differences in both and regional local meteorology 2020 compared with 2015–2019. By adopting a globally consistent approach, this comprehensive observational analysis focuses on changes quality around cities...
Tropospheric ozone threatens human health and crop yields, exacerbates global warming, fundamentally changes atmospheric chemistry. Evidence has pointed toward widespread increases in the troposphere, particularly surface is chemically complex difficult to abate. Despite past successes some regions, a solution new challenges of pollution warming climate remains unexplored. In this perspective, by compiling measurements at ∼4,300 sites worldwide between 2014 2019, we show emerging challenge...
Abstract. Tropospheric ozone results from in situ chemical formation and stratosphere–troposphere exchange (STE), with the latter being more important middle upper troposphere than lower troposphere. Ozone photochemical is nonlinear oxidation of methane non-methane hydrocarbons (NMHCs) presence nitrogen oxide (NOx=NO+NO2). Previous studies showed that O3 short- long-term trends are nonlinearly controlled by near-surface anthropogenic emissions carbon monoxide (CO), volatile organic compounds...
Abstract. In this study, trends of 21st-century ground-level ozone and precursors were examined across South America, a less-studied region where trend estimates have rarely been comprehensively addressed. Therefore, we provided an updated regional analysis based on validated surface observations. We tested the hypothesis that recent increasing trends, mostly in urban environments, resulted from intense wildfires driven by extreme meteorological events impacting cities preexisting volatile...
This study aims to evaluate the reliability of volatile organic compound (VOC) detection and identification in complex coastal terrains Central Chile. In this zone, frequent complaints by residents prompted a new National Ambient Air Quality Standard for benzene 2023, set at 0.9 ppbv (nmol mol-1). The monitoring site is located Concón City, near an oil refinery where we combine Proton Transfer Reaction Time Flight Mass Spectrometry (PTR–TOF–MS), Gas Chromatograph...
Stratosphere-troposphere exchange (STE) plays a key role in the tropospheric ozone budget. In extratropical latitudes, transport from stratosphere occurs mainly through development of cut-off lows and tropopause folds. However, chemical measurements free troposphere between upper lower (UTLS) are remarkably sparse southern hemisphere compared with northern hemisphere. this context, Southern Hemisphere Transport, Dynamics, Chemistry (SouthTRAC) campaign was conducted September November 2019....
Despite the decline in partially (PM10) and fully (PM2.5) inhalable particles observed recent decades, Santiago Chile shows high levels of particle ozone pollution. Attainment plans have emphasized measures aimed at curbing primary and, to some extent, secondary particles, but little attention has been paid photochemical Nevertheless, hourly mixing ratios Eastern regularly exceed 110 ppbv summer, winter maximum often reach 90 ppbv. Moreover, sum nitrogen dioxide an increasing trend more than...
This study delves into the photochemical atmospheric changes reported globally during pandemic by analyzing change in emissions from mobile sources and contribution of local meteorology to ozone (O3) particle formation Bogotá (Colombia), Santiago (Chile), São Paulo (Brazil). The impact mobility reductions (50%–80%) produced early coronavirus-imposed lockdown was assessed through high-resolution vehicular emission inventories, surface measurements, aerosol optical depth size, satellite...
Observations were performed in 12 communities of Central Chile order to determine the horizontal gradients ozone Santiago Basin and surrounding valleys. Higher mixing ratios found northeast included east Aconcagua Valley (~70 km from Santiago) suggesting that photochemical pollution produced is capable passing through Chacabuco mountain chain (~1.3 km) have impact downwind regions with largest NO x VOC emissions. To complement existing surface observations, ozonesonde tethersonde campaigns...
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