A5023651106- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Aeolian processes and effects
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Radioactivity and Radon Measurements
- Calibration and Measurement Techniques
- Historical Influence and Diplomacy
- Reformation and Early Modern Christianity
- Data Management and Algorithms
- Climate variability and models
- Agriculture, Soil, Plant Science
- Historical Legal Studies and Society
- Marine and coastal ecosystems
- Toxic Organic Pollutants Impact
- Oil Spill Detection and Mitigation
- Transboundary Water Resource Management
- Remote Sensing and LiDAR Applications
- Solar Radiation and Photovoltaics
- Vehicle emissions and performance
- Meteorological Phenomena and Simulations
- Fire effects on ecosystems
Langley Research Center
2023-2024
National Aeronautics and Space Administration
2024
University of Arizona
2017-2023
Science Systems and Applications (United States)
2023
Airborne NASA Langley Research Center (LaRC) High Spectral Resolution Lidar-2 (HSRL-2) measurements acquired during the recent Earth Venture Suborbital-3 (EVS-3) Aerosol Cloud Meteorology Interactions over Western Atlantic Experiment (ACTIVATE) revealed elevated particulate linear depolarization associated with aerosols within marine boundary layer. These observations were off east coast of United States both winter and summer 2020 2021 when HSRL-2 was deployed on LaRC King Air aircraft....
Abstract This study examines major wildfires in the western United States between 2005 and 2015 to determine which species exhibit highest percent change mass concentration on day of peak fire influence relative preceding nonfire days. Forty‐one fires were examined using Environmental Protection Agency (EPA) Interagency Monitoring Protected Visual Environments (IMPROVE) data set. Organic carbon (OC) elemental (EC) constituents exhibited increase. The sharpest enhancements for volatile (OC1)...
Abstract The NASA Cloud, Aerosol, and Monsoon Processes Philippines Experiment (CAMP 2 Ex) employed the P-3, Stratton Park Engineering Company (SPEC) Learjet 35, a host of satellites surface sensors to characterize coupling aerosol processes, cloud physics, atmospheric radiation within Maritime Continent’s complex southwest monsoonal environment. Conducted in late summer 2019 from Luzon, Philippines, conjunction with Office Naval Research Propagation Intraseasonal Tropical Oscillations...
In this study, we propose a simple method to derive vertically resolved aerosol particle number concentration ( N ) using combined polarimetric and lidar remote sensing observations. This relies on accurate polarimeter retrievals of the fine-mode column-averaged extinction cross section measurements coefficient such as those provided by multiwavelength high spectral resolution lidar. We compare resulting + product in situ data collected airborne instruments during NASA cloud meteorology...
Abstract. The NASA Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) produced a unique dataset for research into aerosol–cloud–meteorology interactions, with applications extending from process-based studies to multi-scale model intercomparison and improvement as well remote-sensing algorithm assessments advancements. ACTIVATE used two Langley Research Center aircraft, HU-25 Falcon King Air, conduct systematic spatially coordinated flights over northwest...
Abstract This study examines boundary layer turbulence derived from high temporal resolution meteorological measurements 40 research flights over the western North Atlantic Ocean during 2020 deployments of ACTIVATE. Frequency distributions various turbulent quantities reveal stronger winter deployment than in summer and for cloud‐topped cloud‐free layers deployment. Maximum kinetic energy (TKE) is most often within cloud observations summer, whereas it mostly below both seasons by a global...
A challenging aspect of conducting airborne in situ observations the atmosphere is how to optimize flight plans for specific objectives and constraints associated with weather restrictions. For aerosol-cloud interaction research, two recent campaigns utilized a “stairstepping” approach whereby an aircraft conducts level legs at various altitudes while moving forward each subsequent leg: 2019 MONterey Aerosol Research Campaign (MONARC) over northeast Pacific 2020–2022 Cloud meTeorology...
Airborne field data are used to examine relationships between giant cloud condensation nuclei (GCCN) and composition advance knowledge of poorly characterized GCCN–cloud interactions.
Abstract The NASA Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) conducted 162 joint flights with two aircraft over northwest Atlantic to study aerosol-cloud interactions (ACI), which represent largest uncertainty in estimating total anthropogenic radiative forcing. combination of a high-flying King Air and low-flying HU-25 Falcon, equipped remote sensing situ instruments, characterized trace gases, aerosol particles, clouds, meteorological variables...
The MONterey Aerosol Research Campaign (MONARC) in May-June 2019 featured 14 repeated identical flights off the California coast over open ocean at same time each flight day. objective of this study is to use MONARC data along with machine learning analysis evaluate relationships between both supermicrometer sea salt aerosol number (N
Abstract. The NASA Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) produced a unique dataset for research into aerosol-cloud-meteorology interactions with applications extending from process-based studies to multi-scale model intercomparison and improvement, remote sensing algorithm assessments advancements. ACTIVATE used two Langley Research Center aircraft, HU-25 Falcon King Air, conduct systematic spatially coordinated flights over northwest Atlantic...
Abstract. This study reports measurements of size-resolved aerosol composition at a site in Incheon along with other characteristics for contrast between (coastal) and Seoul (inland), South Korea, during transboundary pollution event the early part an intensive sampling period 4 11 March 2019. Anthropogenic emissions were dominant boundary layer over region 6 March, much smaller contributions from dust, smoke, sea salt. The meteorology this (shallow layer, enhanced humidity, low temperature)...
Abstract. Cloud processing is known to generate aerosol species such as sulfate and secondary organic aerosol, yet there a scarcity of airborne data examine this issue. The NASA Aerosol meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) was designed build an unprecedented dataset relevant aerosol–cloud interactions with two coordinated aircraft over northwestern Atlantic, mass spectrometer used from four deployments between 2020–2021 contrast composition below, in...
Abstract Suborbital (e.g., airborne) campaigns that carry advanced remote sensing and in situ payloads provide detailed observations of atmospheric processes, but can be challenging to use when it is necessary geographically collocate data from multiple platforms make repeated a given geographic location at different altitudes. This study reports on collocation algorithm maximizes the volume collocated two coordinated suborbital demonstrates its value using NASA Aerosol Cloud Meteorology...
Abstract Process modeling of Aerosol‐cloud interaction (ACI) is essential to bridging gaps between observational analysis and climate aerosol effects in the Earth system eventually reducing projection uncertainties. In this study, we examine ACI summertime precipitating shallow cumuli observed during Aerosol Cloud meTeorology Interactions oVer western ATlantic Experiment (ACTIVATE). Aerosols were extensively with in‐situ remote‐sensing instruments two research flight cases on 02 June 07...
With the ongoing expansion of global observation networks, it is expected that we shall routinely analyze records geophysical variables such as temperature from multiple collocated instruments. Validating datasets in this situation not a trivial task because every observing system has its own bias and noise. Triple collocation general statistical framework to estimate error characteristics three or more observational-based datasets. In triple colocation analysis, several metrics are reported...
One of the most significant environmental catastrophes throughout Middle East and Caucasus region has been desiccation Lake Urmia, world second-largest hypersaline lake. This lake lost approximately two-thirds its water volume since 1999, resulting in increased exposure lacustrine deposits that are considered as a new aerosol source. situ study investigates for first time spatial distribution water-soluble ion concentrations (Cl–, Br–, NO2–, NO3–, SO42–, methanesulfonate (MSA), pyruvate,...
Process modeling of aerosol-cloud interaction is essential to bridging gaps between observational analysis and climate aerosol effects in the Earth system eventually reducing projection uncertainties. In this study, we examine summertime precipitating shallow cumuli observed during Aerosol Cloud meTeorology Interactions oVer western ATlantic Experiment (ACTIVATE). Aerosols were extensively with in-situ remote-sensing instruments two research flight cases on 02 June 07 June, respectively,...
Abstract. Aerosol optical depth was retrieved from two airborne remote sensing instruments, the Research Scanning Polarimeter (RSP) and Second Generation High Spectral Resolution Lidar (HSRL-2), during National Aeronautics Space Administration (NASA) Cloud meTeorology Interactions oVer western ATlantic Experiment (ACTIVATE). The field campaign offers a unique opportunity to evaluate an extensive 3-year dataset under wide range of meteorological conditions instruments on same platform....
Abstract. Remote sensors such as lidars and polarimeters are increasingly being used to understand atmospheric aerosol particles their role in critical cloud marine boundary layer processes. Therefore, it is essential ensure these instruments' retrievals of optical microphysical properties consistent with measurements taken by in-situ instruments (i.e., external closure). However, achieving rigorous closure challenging because often 1) provide dry (relative humidity (RH) < 40 %) while...