A5086337379- Environmental and Agricultural Sciences
- Pasture and Agricultural Systems
- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Forest, Soil, and Plant Ecology in China
- Atmospheric chemistry and aerosols
- Climate variability and models
- Remote Sensing and Land Use
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Odor and Emission Control Technologies
- Cryospheric studies and observations
- Air Quality and Health Impacts
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Neural Networks and Applications
- Global Energy and Sustainability Research
- Geological Studies and Exploration
- Agricultural Economics and Policy
- Solar Radiation and Photovoltaics
- Anomaly Detection Techniques and Applications
- Risk Perception and Management
- Computational Physics and Python Applications
- Environmental Policies and Emissions
- Indoor Air Quality and Microbial Exposure
Atmospheric and Environmental Research
2018-2025
Verisk Analytics (United States)
2023
Planetary Science Institute
2010-2019
Harvard University
2010-2019
Harvard University Press
2017
University of Washington
2010-2011
Fire is an integral component of ecosystems globally and a tool that humans have harnessed for millennia. Altered fire regimes are fundamental cause consequence global change, impacting people the biophysical systems on which they depend. As part newly emerging Anthropocene, marked by human-caused climate change radical changes to ecosystems, danger increasing, fires having increasingly devastating impacts human health, infrastructure, ecosystem services. Increasing vexing problem requires...
The presence of volatile organic compounds (VOCs) in unprocessed natural gas (NG) is well documented; however, the degree to which VOCs are present NG at point end use largely uncharacterized. We collected 234 whole samples across 69 unique residential locations Greater Boston metropolitan area, Massachusetts. were measured for methane (CH4), ethane (C2H6), and nonmethane VOC (NMVOC) content (including tentatively identified compounds) using commercially available USEPA analytical methods....
Abstract The evolution of organic aerosol (OA) composition and size distributions within smoke plumes are uncertain due to variability in the rates OA evaporation/condensation coagulation a plume. It remains unclear how varies across different parts individual plumes. We use large eddy simulation model coupled with aerosol‐microphysics radiation models simulate Williams Flats fire sampled during Fire Influence on Regional Global Environments Air Quality field campaign. At aircraft altitude,...
Abstract. Amazonia's net biome exchange (NBE), the sum of biogenic and wildfire carbon fluxes, is a fundamental indicator state its ecosystems. It also quantifies magnitude patterns short- long-term dioxide sources sinks but poorly quantified out equilibrium (non-zero) due to both direct (deforestation) indirect (climate-related) anthropogenic disturbance. Determining trends in balance, shifts pathways NBE, timescales ecosystem sensitivity disturbance requires reliable flux models that...
The shifting frontiers of air pollution emission sources contribute to stagnation or reversal quality gains across the United States (US). frequency and possibly duration Exceptional Events - driven primarily by wildfires dust storms have significantly increased in US over past decade. Combined with Environmental Protection Agency (EPA) final rule strengthening primary annual National Ambient Air Quality Standards (NAAQS) for PM
Abstract. Accurately quantifying the spatiotemporal distribution of biological component CO2 surface–atmosphere exchange is necessary to improve top-down constraints on China's anthropogenic emissions. We provide hourly fluxes as net ecosystem (NEE; µmol m−2 s−1) a 0.25∘×0.25∘ grid by adapting Vegetation, Photosynthesis, and Respiration Model (VPRM) eastern half China for time period from 2005 2009; minimal empirical parameterization VPRM-CHINA makes it well suited inverse modeling...
Abstract. Soil uptake of atmospheric hydrogen (H2) and the associated isotope effect were studied using soil chambers in a Western Washington second-growth coniferous forest. Chamber studies conducted during both winter summer seasons to account for large natural variability moisture content (4–50%) temperature (6–22 °C). H2 deposition velocities found range from 0.01–0.06 cm s−1 with an average 0.033 ± 0.008 (95% confidence interval). Consistent prior studies, correlated below 20% season....
Abstract The terrestrial biosphere strongly modulates atmospheric CO 2 mixing ratios, whose inexorable rise propels anthropogenic climate change. Modeling and mechanistically understanding C uptake by the are thus of broad societal concerns. Yet despite considerable progress, scaling up point observations to landscape larger scales continues frustrate analyses anthropogenically perturbed global cycle. While that up‐scaling is our overarching motivation, here we focus on one its elements,...
Abstract. China has pledged reduction of carbon dioxide (CO2) emissions per unit gross domestic product (GDP) by 60 %–65 % relative to 2005 levels, and peak overall 2030. However, the lack observational data disagreement among many available inventories makes it difficult for track progress toward these goals evaluate efficacy control measures. To demonstrate value atmospheric observations constraining CO2 we ability concentrations predicted from three different match a unique multi-year...
Abstract. China has pledged reduction of carbon dioxide emissions per unit GDP by 60–65 % relative to 2005 levels, and peak overall 2030. However, disagreement among available inventories makes it difficult for track progress toward these goals evaluate the efficacy regional control measures. In this study, we three anthropogenic CO2 tracking fidelity predicted concentrations in atmosphere observations, focusing on key commitment period Paris accords (2005) Beijing Olympics (2008). One...
Twenty-eight states require disclosure of hydraulic fracturing chemicals. Twenty-three direct reporting to FracFocus; additionally, companies in other use this registry. FracFocus contains the most comprehensive dataset on chemicals but faces data quality and transparency criticisms. In response, announced upgrades, since May 2015, publishes aggregated data. We used Linux R version 3.2.0 clean analyze 96,449 forms submitted between March 9, 2011 April 13, 2015 for accuracy, completeness,...
Abstract. Amazonia’s Net Biome Exchange (NBE), the sum of biogenic and wildfire carbon fluxes, is a fundamental indicator state its ecosystems. It also quantifies magnitude patterns short- long-term dioxide sources sinks but poorly quantified out equilibrium (non-zero) due to both direct (deforestation) indirect (climate-related) anthropogenic disturbance. Determining trends in balance, shifts exchange pathways NBE, timescales ecosystem sensitivity disturbance requires reliable flux models...
The oil and natural gas industry needs accurate frequent information on methane CH4 emissions from all of their facilities globally in order to effectively reduce emissions. Here we describe the development requirements for a constellation satellites provide data point source industry. Three types sources were examined: isolated continuous plumes with rates 50 kg hr-1, intermittent releases activities such as compressor start-ups, overlapping plumes. dispersion model SCICHEM was used...
Abstract. Accurately quantifying the spatiotemporal distribution of biological component CO2 surface-atmosphere exchange is necessary to improve top-down constraints on China's anthropogenic emissions. We provide hourly fluxes as Net Ecosystem Exchange (NEE; µmol m−2 s−1) a 0.25° × grid by adapting Vegetation, Photosynthesis, and Respiration Model (VPRM) eastern half China for time period from 2005–2009; minimal empirical parameterization VPRM-CHINA makes it well-suited inverse modeling...
ADVERTISEMENT RETURN TO ISSUEPREVCorrespondence/Rebut...Correspondence/RebuttalNEXTRebuttal to the Correspondence on Home is Where Pipeline Ends: Characterization of Volatile Organic Compounds Present in Natural Gas at Point Residential End UserDrew R. Michanowicz*Drew MichanowiczHarvard T.H. Chan School Public Health, C-CHANGE, Boston, Massachusetts 02215, United StatesPSE Healthy Energy, Oakland, California 94612, States*E-mail: [email protected]More by Drew...