A5046867779- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Air Quality Monitoring and Forecasting
- Spectroscopy and Laser Applications
- Vehicle emissions and performance
- Air Quality and Health Impacts
- Wind and Air Flow Studies
- Stellar, planetary, and galactic studies
- Coal Properties and Utilization
- Spacecraft Design and Technology
- Oil, Gas, and Environmental Issues
- Planetary Science and Exploration
- Meteorological Phenomena and Simulations
- Spacecraft and Cryogenic Technologies
- Astronomy and Astrophysical Research
- Carbon Dioxide Capture Technologies
- Geochemistry and Geologic Mapping
- Climate Change Policy and Economics
- Astro and Planetary Science
- Atmospheric aerosols and clouds
- COVID-19 impact on air quality
- Climate Change and Geoengineering
Mapp Biopharmaceutical (United States)
2021-2025
Jet Propulsion Laboratory
2015-2024
University of Arizona
2019-2024
California Institute of Technology
2003-2022
Carbon180
2022
Impact Technology Development (United States)
2021-2022
The Shuttle Radar Topography Mission produced the most complete, highest‐resolution digital elevation model of Earth. project was a joint endeavor NASA, National Geospatial‐Intelligence Agency, and German Italian Space Agencies flew in February 2000. It used dual radar antennas to acquire interferometric data, processed topographic data at 1 arc sec resolution. Details development, flight operations, processing, products are provided for users this revolutionary set.
Methane emissions from oil and gas (O&G) production transmission represent a considerable contribution to climate change. These comprise sporadic releases of large amounts methane during maintenance operations or equipment failures not accounted for in current inventory estimates. We collected analyzed hundreds very atmospheric images sampled by the TROPOspheric Monitoring Instrument (TROPOMI) between 2019 2020. Ultra-emitters are primarily detected over largest O&G basins throughout...
Abstract. A globally integrated carbon observation and analysis system is needed to improve the fundamental understanding of global cycle, our ability project future changes, verify effectiveness policies aiming reduce greenhouse gas emissions increase sequestration. Building an requires transformational advances from existing sparse, exploratory framework towards a dense, robust, sustained in all components: anthropogenic emissions, atmosphere, ocean, terrestrial biosphere. The paper...
\We present the sixth catalog of Kepler candidate planets based on nearly 4 years high precision photometry. This builds legacy previous catalogs released by project and includes 1493 new Objects Interest (KOIs) which 554 are planet candidates, 131 these candidates have best fit radii <1.5 R_earth. brings total number KOIs to 7305 4173 respectively. We suspect that many at low signal-to-noise limit may be false alarms created instrumental noise, discuss our efforts identify such objects....
The Permian Basin is the largest and fastest growing oil gas (O&G) producing region in United States. We conducted an extensive airborne campaign across majority of September–November, 2019 with imaging spectrometers to quantify strong methane (CH4) point source emissions at facility-scales, including high frequency sampling evaluate intermittency. identified 1100 unique heavy-tailed distributed sources that were sampled least 3 times (average 8 times), showing 26% average persistence....
Abstract. We review the capability of current and scheduled satellite observations atmospheric methane in shortwave infrared (SWIR) to quantify emissions from global scale down point sources. cover retrieval methods, precision accuracy requirements, inverse mass balance methods for inferring emissions, source detection thresholds, observing system completeness. classify instruments as area flux mappers imagers, with complementary attributes. Area are high-precision (<1 %) 0.1–10 km pixel...
An unexpectedly high number of extreme methane plumes is detected in the Permian basin with new satellite technology.
Understanding, prioritizing, and mitigating methane (CH
Carbon dioxide and methane emissions are the two primary anthropogenic climate-forcing agents an important source of uncertainty in global carbon budget. Uncertainties further magnified when occur at fine spatial scales (<1 km), making attribution challenging. We present first observations from NASA's Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer showing quantification fine-scale (0.3 to 73 tonnes CH4 hour-1) sources (1571 3511 CO2 spanning oil gas, waste,...
Methane emissions from solid waste may represent a substantial fraction of the global anthropogenic budget, but few comprehensive studies exist to assess inventory assumptions. We quantified at hundreds large landfills across 18 states in United States between 2016 and 2022 using airborne imaging spectrometers. Spanning 20% open landfills, this represents most systematic measurement-based study methane point sources sector. detected significant source majority (52%) these sites, many with...
a near global digital elevation model that allows software authors to determine the terrain height of nearly any point on earth
Abstract This paper explores the urban carbon cycle from natural sciences perspective, identifying key knowledge gaps and priority areas for future research. The combination of large, concentrated fluxes rapid change makes cities elements offers potential them to serve as “first responders” climate action. Estimates urban‐scale are significantly more uncertain than at larger spatial scales, in part because past studies have mostly avoided local/urban scales where mix anthropogenic is complex...
We report continuous surface observations of carbon dioxide (CO2) and methane (CH4) from the Los Angeles (LA) Megacity Carbon Project during 2015. devised a calibration strategy, methods for selection background air masses, calculation urban enhancements, detailed algorithm estimating uncertainties in urban-scale CO2 CH4 measurements. These are essential understanding fluxes LA megacity other complex environments globally. estimate mole fractions entering using four "extra-urban" sites...
The Earth Surface Mineral Dust Source Investigation, EMIT, is planned to operate from the International Space Station starting no earlier than fall of 2021. EMIT will use visible short wavelength infrared imaging spectroscopy determine mineral composition arid land dust source regions advance our knowledge radiative forcing effect these aerosols. emitted into atmosphere under high wind conditions an element system with many impacts Earth's energy balance, atmosphere, surface, and oceans....
Abstract The Aliso Canyon gas storage facility near Porter Ranch, California, produced a large accidental CH 4 release from October 2015 to February 2016. Hyperion imaging spectrometer on board the EO‐1 satellite successfully detected this event, achieving first orbital attribution of single anthropogenic superemitter. measured shortwave infrared signatures 2.3 μm at 0.01 spectral resolution and 30 m spatial resolution. It plume three overpasses, mapping its magnitude morphology. These...
Abstract Independent lines of research on urbanization, urban areas, and carbon have advanced our understanding some the processes through which energy land uses affect carbon. This synthesis integrates these diverse viewpoints as a first step toward coproduced, integrated framework for their relationships to It suggests need approaches that complement combine plethora existing insights into interdisciplinary explorations how different urbanization processes, socio‐ecological technological...
Abstract. Megacities are major sources of anthropogenic fossil fuel CO2 (FFCO2) emissions. The spatial extents these large urban systems cover areas 10 000 km2 or more with complex topography and changing landscapes. We present a high-resolution land–atmosphere modelling system for emissions over the Los Angeles (LA) megacity area. Weather Research Forecasting (WRF)-Chem model was coupled to very FFCO2 emission product, Hestia-LA, simulate atmospheric concentrations across LA at resolutions...
Abstract. We examine the potential for global detection of methane plumes from individual point sources with new generation spaceborne imaging spectrometers (EnMAP, PRISMA, EMIT, SBG, CHIME) scheduled launch in 2019–2025. These instruments are designed to map Earth's surface at high spatial resolution (30 m×30 m) and have a spectral 7–10 nm 2200–2400 band that should also allow useful atmospheric methane. simulate scenes viewed by EnMAP (10 resolution, 180 signal-to-noise ratio) using...
Abstract. At local scales, emissions of methane and carbon dioxide are highly uncertain. Localized sources both trace gases can create strong gradients in its columnar abundance, which be discerned using absorption spectroscopy at high spatial resolution. In a previous study, more than 250 plumes were observed the San Juan Basin near Four Corners during April 2015 next-generation Airborne Visible/Infrared Imaging Spectrometer (AVIRIS-NG) linearized matched filter. For first time, we apply...
Abstract Solid waste management represents one of the largest anthropogenic methane emission sources. However, precise quantification landfill and composting emissions remains difficult due to variety site-specific factors that contribute gas generation effective capture. Remote sensing is an avenue quantify process-level from facilities. The California Methane Survey flew Next Generation Airborne Visible/Infrared Imaging Spectrometer (AVIRIS-NG) over 270 landfills 166 organic facilities...
Abstract Incidents involving loss of control oil/gas wells can result in large but variable emissions whose impact on the global methane budget is currently unknown. On November 1, 2019, a gas well blowout was reported Eagle Ford Shale. By combining satellite observations at different spatial and temporal scales, we quantified 10 times during 20‐day event. Our multisatellite synthesis captures both short‐term dynamics total integrated blowout. Such detailed event characterization previously...