A5041723633- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Coal Properties and Utilization
- Hydrocarbon exploration and reservoir analysis
- Odor and Emission Control Technologies
- Atmospheric chemistry and aerosols
- Wind and Air Flow Studies
- Atmospheric Ozone and Climate
- Cardiac electrophysiology and arrhythmias
- Cardiac Arrhythmias and Treatments
- Dental Erosion and Treatment
- Occupational health in dentistry
- Cardiac pacing and defibrillation studies
- Coastal and Marine Management
- Geochemistry and Geologic Mapping
- Meteorological Phenomena and Simulations
- Coastal and Marine Dynamics
- Dental Anxiety and Anesthesia Techniques
McMaster University
2022
University of California, Riverside
2018-2021
Riphah International University
2021
Jet Propulsion Laboratory
2017-2018
Abstract Regional methane emissions monitoring is rapidly expanding with increased coverage of surface, airborne, and satellite instruments. We pilot a multitiered observing system in the Los Angeles Basin. combine surface measurements from Megacities Carbon Project, mountaintop retrievals CLARS‐FTS instrument, space‐based X CH4 TROPOMI instrument into single framework. simulate these observations using high‐resolution tracer transport model. Using inverse methods, we compare sensitivity...
Abstract We combine sustained observations from a network of atmospheric monitoring stations with inverse modeling to uniquely obtain spatiotemporal (3‐km, 4‐day) estimates methane emissions the Los Angeles megacity and broader South Coast Air Basin for 2015–2016. Our inversions use customized validated high‐fidelity meteorological output Weather Research Forecasting Stochastic Time‐Inverted Lagrangian model innovatively employ resolution matrix‐based metric disentangle information content...
Abstract Accurate and timely detection, quantification, attribution of methane emissions from Underground Gas Storage (UGS) facilities is essential for improving confidence in greenhouse gas inventories, enabling emission mitigation by facility operators, supporting efforts to assess integrity safety. We conducted multiple airborne surveys the 12 active UGS California between January 2016 November 2017 using advanced remote sensing situ observations near-surface atmospheric (CH 4 ). These...
Abstract. Methane (CH4) is a potent greenhouse gas (GHG) and critical target of climate mitigation efforts. However, actionable emission reduction efforts are complicated by large uncertainties in the methane budget on relevant scales. Here, we present Vista, Geographic Information System (GIS)-based approach to map potential emissions sources South Coast Air Basin (SoCAB) that encompasses Los Angeles, an area with dense, complex mixture sources. The goal this work provide database that,...
Methane (CH4), an important greenhouse gas and pollutant, has been targeted for mitigation. Our recent California airborne survey identified >500 CH4 point source super-emitters, which accounted 34-46% of the statewide emissions inventory 2016.8 Individual plumes were observed in close proximity to expected methane emitting infrastructure, including storage facilities, hydrocarbon tanks, landfills, dairy lagoons, pipeline leaks. In order systematically attribute these their sources, we...
Abstract. Dairies emit roughly half of total methane (CH4) emissions in California, generating CH4 from both enteric fermentation by ruminant gut microbes and anaerobic decomposition manure. Representation these emission processes is essential for management mitigation typically done using standardized factors applied at large spatial scales (e.g., state level). However, CH4-emitting activities decisions vary across facilities, current inventories do not have sufficiently high resolution to...
Abstract. Methane is a potent greenhouse gas (GHG) and critical target of climate mitigation efforts. However, actionable emission reduction efforts are complicated by large uncertainties in the methane budget at relevant scales. Here, we present Vista, Geographic Information System (GIS)-based approach to map potential emissions sources greater Los Angeles, an area with dense, complex mixture sources. The goal this work provide database that, together atmospheric observations, improves...
<p>The Methane Source Finder is a web-based data portal developed under NASA’s CMS and ACCESS programs for exploring methane in the state of California. This open access interactive map allows users to discover, analyze, download across range spatial scales derived from remote-sensing, surface monitoring, bottom-up infrastructure information. includes plume images associated emission estimates 2016-2018 California Survey using airborne imaging spectrometer...
This data set provides spatial products with identified and classified locations of potential methane (CH4) emitting facilities infrastructure in the South Coast Air Basin (SoCAB). These form a GIS-based mapping database designed to address shortcomings current urban CH4 source inventories is known as Vista Los Angeles (Vista-LA). SoCAB air shed for greater area, which includes urbanized portions Angeles, Orange, Riverside, San Bernardino Counties, California, USA. Vista-LA consists detailed...
Abstract. Dairies emit roughly half of total methane (CH4) emissions in California, generating CH4 from both enteric fermentation by ruminant gut microbes and anaerobic decomposition manure. Representation these emission processes is essential for management mitigation emissions, typically done using standardized factors applied at large spatial scales (e.g., state level). However, CH4-emitting activities decisions vary across facilities, current inventories do not have sufficiently high...
Abstract Methane is a potent yet underestimated contributor to global greenhouse gas emissions. We examined the characteristics of 255 sources methane super-emitters identified by NASA’s Airborne Visible/InfraRed Imaging Spectrometer-Next Generation in 109 California oil fields. Super-emitter events were primarily associated with & wells, gathering pipelines, and storage tanks (73% sources). Sources persistence <=20% > 50% comprised 77% 1% contributed 59% 4% total measured...
Fair-
&lt;p&gt;The 2016-2018 California Methane Survey used the airborne imaging spectrometer AVIRIS-NG to survey approximately 59,000 km&lt;sup&gt;2&lt;/sup&gt; and 272,000 individual facilities infrastructure components. Over 500 strong methane point sources spanning waste management, agriculture, energy sectors were detected, geolocated, quantified. In order facilitate communication of results with scientists, stakeholder agencies in California, private sector companies,...
OBJECTIVE: The objective of this study was to compare the efficacy dentifrices containing potassium nitrate and strontium chloride in reducing dentinal sensitivity pain. METHODOLOGY: A pilot conducted Islamic International Dental Hospital Islamabad, Pakistan (Duration two weeks). Forty participants were selected, aged between 18-40 years, having dentin hypersensitivity with minimum score 4 on Visual Analog Scale. Participants randomly allocated 5% w/w 10 % asked use it for 2 weeks come back...