A5000131742- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Air Quality Monitoring and Forecasting
- Particle Dynamics in Fluid Flows
- Air Quality and Health Impacts
- earthquake and tectonic studies
- Environmental Education and Sustainability
- Education Practices and Evaluation
- Advanced Aircraft Design and Technologies
- Calibration and Measurement Techniques
- Space exploration and regulation
- Fire effects on ecosystems
- Spacecraft Design and Technology
- Air Traffic Management and Optimization
- Diverse Education and Engineering Focus
- Geological and Geochemical Analysis
- Earthquake Detection and Analysis
- Aerospace and Aviation Technology
- Wind and Air Flow Studies
- Human-Automation Interaction and Safety
- Speech and dialogue systems
University of Hawaiʻi at Mānoa
2017-2024
University of Hawaii System
2014-2019
Abstract. Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) 5-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three intensive observation periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June–October), reaching 3–5...
Abstract. The colocation of clouds and smoke over the southeast Atlantic Ocean during southern African biomass burning season has numerous radiative implications, including microphysical modulation if is entrained into marine boundary layer. NASA's ObseRvations Aerosols above CLouds their intEractionS (ORACLES) campaign studying this system with aircraft in three field deployments between 2016 2018. Results from ORACLES-2016 show that relationship cloud droplet number concentration below...
Abstract. Southern Africa produces almost a third of the Earth’s biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) five-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three Intensive Observation Periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June-October), reaching...
Abstract. The southeast Atlantic (SEA) region is host to a climatologically significant biomass burning aerosol layer overlying marine stratocumulus. We present the first results of directly measured above-cloud optical depth (ACAOD) from recent ObseRvations Aerosols above CLouds and their intEractionS (ORACLES) airborne field campaign during August September 2016. In our analysis, we use data Spectrometers for Sky-Scanning Sun-Tracking Atmospheric Research (4STAR) instrument found an...
Abstract. Cloud droplet number concentration (Nd) is of central importance to observation-based estimates aerosol indirect effects, being used quantify both the cloud sensitivity and base state cloud. However, derivation Nd from satellite data depends on a assumptions about accuracy retrievals properties which it derived, making prone systematic biases. A sampling strategies have been proposed address these biases by selecting most accurate in data. This work compares impact retrieved Nd,...
Abstract. Aerosol–cloud–precipitation interactions (ACIs) provide the greatest source of uncertainties in predicting changes Earth's energy budget due to poor representation marine stratocumulus and associated ACIs climate models. Using situ data from 329 cloud profiles across 24 research flights NASA ObseRvations Aerosols above CLouds their intEractionS (ORACLES) field campaign September 2016, August 2017, October 2018, it is shown that contact between above-cloud biomass burning aerosols...
Abstract. Satellite remote sensing retrievals of cloud effective radius (CER) are widely used for studies aerosol–cloud interactions. Such retrievals, however, rely on forward radiative transfer (RT) calculations using simplified assumptions that can lead to retrieval errors when the real atmosphere deviates from model. Here, coincident airborne and in situ observations obtained during NASA's ObseRvations Aerosols above CLouds their intEractionS (ORACLES) field campaign evaluate CER marine...
Abstract Weather creates numerous operational and safety hazards within the National Airspace System (NAS). In 2014, extreme weather events attributed 4.3% to total number of delay minutes recorded by Bureau Transportation Statistics. When factoring weather’s impact on NAS delays aircraft arriving late delays, was responsible for 32.6% recorded. Hourly surface meteorological aviation routine reports (METARs) at major airports can be used provide valuable insight into likely causes individual...
Abstract. Boundary layer and turbulent characteristics (surface fluxes, kinetic energy – TKE, dissipation rate ϵ), along with synoptic-scale changes in these properties over time, are examined using data collected from 18 research flights made the CIRPAS Twin Otter Aircraft. Data were during Variability of American Monsoon Systems (VAMOS) Ocean–Cloud–Atmosphere–Land Study Regional Experiment (VOCALS-REx) at Point Alpha (20∘ S, 72∘ W) October November 2008 off coast South America. The average...
Abstract Aerosols are a critical component of the Earth's atmosphere and can affect climate Earth through their interactions with solar radiation clouds. Cloud fraction (CF) aerosol optical depth (AOD) at 550 nm from Moderate Resolution Imaging Spectroradiometer (MODIS) used analogous cloud properties Historical Phase 5 Coupled Model Intercomparison Project (CMIP5) model runs that explicitly include anthropogenic aerosols parameterized cloud‐aerosol interactions. The models underestimate AOD...
Abstract A critical determinant of aircraft performance is density altitude, or the given as a height above mean sea level, which dependent on air temperature, pressure, and humidity. These meteorological variables change various time scales (e.g., hourly, seasonal, decadal) are regionally impacted by large-scale climate variability result phenomena such El Niño–Southern Oscillation Arctic Oscillation. Here statistical analysis performed to determine impacts seasonally averaged key metric...
Abstract In-situ marine cloud droplet number concentrations (CDNCs), condensation nuclei (CCN), and CCN proxies, based on particle sizes optical properties, are accumulated from seven field campaigns: ACTIVATE; NAAMES; CAMP 2 EX; ORACLES; SOCRATES; MARCUS; CAPRICORN2. Each campaign involves aircraft measurements, ship-based or both. Measurements collected over the North Central Atlantic, Indo-Pacific, Southern Oceans, represent a range of clean to polluted conditions in various climate...
Abstract. Aerosol–cloud interactions are complex, including albedo and lifetime effects that cause modifications to cloud characteristics. With most cloud–aerosol focused on the previously stated phenomena, there have been no in situ studies focus explicitly how aerosols can affect large-scale (centimeters tens of meters) droplet inhomogeneities within clouds. This research therefore aims gain a better understanding cumulus clouds be influenced by in-cloud location (cloud edge vs. center)...
Abstract. The South-East Atlantic (SEA) is host to a climatologically significant biomass burning aerosol layer overlying marine stratocumulus. We present directly measured Above Cloud Aerosol Optical Depth (ACAOD) from the recent ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) airborne field campaign during August September 2016. In our analysis, we use data Spectrometers for Sky-Scanning Sun-Tracking Atmospheric Research (4STAR) instrument found an average ACAOD 0.32...
Abstract. Stratocumulus clouds have a significant impact on climate due to their large spatial extent, with areas of enhanced coverage termed stratocumulus decks. How turbulence evolves time and influences the deck properties however, in particular throughout vertical profile boundary layer, is still lacking through model parameterizations small-scale flow. Collecting situ data better understand physical processes occuring within stratocumu- lus therefore key parameterizations. Boundary...
Abstract. The colocation of clouds and smoke over the southeast Atlantic Ocean during southern African biomass burning season has numerous radiative implications, including microphysical modulation if is entrained into marine boundary layer. NASA’s ObseRvtions Aerosols above CLouds their intEractionS (ORACLES) campaign studying this system with aircraft in three field deployments between 2016 2018. Results from ORACLES-2016 show that relationship cloud droplet number concentration below...
Abstract. Aerosol–cloud interactions are complex, including albedo and lifetime effects that cause modifications to cloud characteristics. With most cloud–aerosol focused on the previously stated phenomena, there has been no in–situ studies focus explicitly how aerosols can affect droplet clustering within clouds. This research therefore aims gain a better understanding of cumulus clouds be influenced by in–cloud location (cloud edge vs. center) aerosol number concentration. The...
Sea fog is a societally relevant phenomenon that occurs under the influence of specific oceanic and atmospheric conditions including aerosol conditions. The Yellow region in China regularly experiences sea events, varying intensity, impact coastal regions maritime activities. occurrence structure are impacted by concentration aerosols air where forms. Along with industrial development, pollution has become serious environmental problem Northeastern China. These higher levels confirmed...
Abstract. Satellite remote sensing retrievals of cloud effective radius (CER) are widely used for studies aerosol/cloud interactions. Such retrievals, however, rely on forward radiative transfer (RT) calculations using simplified assumptions that can lead to retrieval errors when the real atmosphere deviates from model. Here, coincident airborne and in situ observations obtained during NASA’s ObseRvations Aerosols above CLouds their intEractionS (ORACLES) field campaign evaluate CER marine...
Abstract It is well known that fluid turbulence can affect cloud droplet motion, leading to clustering, which in turn impact precipitation formation through influences on collision–coalescence. Previous work suggests or preferential concentration, of droplets occurs the order Kolmogorov length‐scale (), with magnitude this clustering depending Stokes number (). However, accuracy these theories remains largely unquantified for atmospheric clouds. Therefore, data gathered from a weakly...
Abstract. Cloud droplet number concentration (Nd) is of central importance to observation-based estimates aerosol indirect effects, being used quantify both the cloud sensitivity and base state cloud. However, derivation Nd from satellite data depends on a assumptions about accuracy retrievals properties which it derived, making prone systematic biases. A sampling strategies have been proposed address these biases by selecting most accurate in data. This work compares impact retrieved Nd,...