C. A. Hostetler
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View article: Particulate Matter Concentrations Derived from Airborne High Spectral Resolution Lidar Measurements Using Machine Learning Regression
Particulate Matter Concentrations Derived from Airborne High Spectral Resolution Lidar Measurements Using Machine Learning Regression Open
We use measurements of near-surface aerosol backscatter, extinction, and depolarization acquired by four NASA Langley Research Center airborne High Spectral Resolution Lidars (HSRLs) in machine learning (ML) regression algorithms to derive…
View article: Observed impacts of aerosol concentration on maritime tropical convection within constrained environments using airborne radiometer, radar, lidar, and dropsondes
Observed impacts of aerosol concentration on maritime tropical convection within constrained environments using airborne radiometer, radar, lidar, and dropsondes Open
Aerosol modulation of atmospheric convection remains an important topic in ongoing research. A key challenge in evaluating aerosol impacts on cumulus convection is isolating their effects from environmental influences. This work investigat…
View article: A method to retrieve mixed-phase cloud vertical structure from airborne lidar
A method to retrieve mixed-phase cloud vertical structure from airborne lidar Open
A technique was developed to provide cloud phase information using data collected by the NASA Langley airborne High Spectral Resolution Lidar systems with a particular emphasis on mixed-phase cloud conditions, where boundaries and gradient…
View article: The NASA ACTIVATE Mission
The NASA ACTIVATE Mission Open
The NASA Aerosol Cloud Meteorology Interactions over the Western Atlantic Experiment (ACTIVATE) conducted 162 joint flights with two aircraft over the northwest Atlantic to study aerosol–cloud interactions (ACIs), which represent the large…
View article: Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer deployments of ACTIVATE 2020: life cycle, transport, and distribution
Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer deployments of ACTIVATE 2020: life cycle, transport, and distribution Open
The Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) is a NASA mission to characterize aerosol–cloud interactions over the western North Atlantic Ocean (WNAO). Such characterization requires understand…
View article: A method to retrieve mixed phase cloud vertical structure from airborne lidar
A method to retrieve mixed phase cloud vertical structure from airborne lidar Open
A technique was developed to provide cloud phase information using data collected by the NASA Langley airborne High Spectral Resolution Lidar systems with a particular emphasis on mixed phase cloud conditions, where boundaries and gradient…
View article: Summarizing multiple aspects of triple collocation analysis in a single diagram
Summarizing multiple aspects of triple collocation analysis in a single diagram Open
With the ongoing expansion of global observation networks, it is expected that we shall routinely analyze records of geophysical variables such as temperature from multiple collocated instruments. Validating datasets in this situation is n…
View article: Comment on egusphere-2024-1065
Comment on egusphere-2024-1065 Open
Abstract. Remote marine regions comprise a high fraction of Earth’s surface, but in-situ vertically-resolved measurements over these locations remain scarce. Here we use airborne data during 15 vertical spiral soundings (0…
View article: High Spectral Resolution Lidar – generation 2 (HSRL-2) retrievals of ocean surface wind speed: methodology and evaluation
High Spectral Resolution Lidar – generation 2 (HSRL-2) retrievals of ocean surface wind speed: methodology and evaluation Open
Ocean surface wind speed (i.e., wind speed 10 m above sea level) is a critical parameter used by atmospheric models to estimate the state of the marine atmospheric boundary layer (MABL). Accurate surface wind speed measurements in diverse …
View article: Boundary Layer Structures Over the Northwest Atlantic Derived From Airborne High Spectral Resolution Lidar and Dropsonde Measurements During the ACTIVATE Campaign
Boundary Layer Structures Over the Northwest Atlantic Derived From Airborne High Spectral Resolution Lidar and Dropsonde Measurements During the ACTIVATE Campaign Open
The Planetary Boundary Layer height (PBLH) is essential for studying PBL and ocean‐atmosphere interactions. Marine PBL is usually defined to include a mixed layer (ML) and a capping inversion layer. The ML height (MLH) estimated from the m…
View article: Comment on egusphere-2024-1065
Comment on egusphere-2024-1065 Open
Abstract. Remote marine regions comprise a high fraction of Earth’s surface, but in-situ vertically-resolved measurements over these locations remain scarce. Here we use airborne data during 15 vertical spiral soundings (0…
View article: Comment on egusphere-2024-1127
Comment on egusphere-2024-1127 Open
Abstract. The Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) is a six-year (2019–2024) NASA Earth-Venture Suborbital-3 (EVS-3) mission to robustly characterize aerosol-cloud-meteorol…
View article: Retrievals of aerosol optical depth over the western North Atlantic Ocean during ACTIVATE
Retrievals of aerosol optical depth over the western North Atlantic Ocean during ACTIVATE Open
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 the National Aeronautics and Space Administrati…
View article: Supplementary material to "Vertical variability of aerosol properties and trace gases over a remote marine region: A case study over Bermuda"
Supplementary material to "Vertical variability of aerosol properties and trace gases over a remote marine region: A case study over Bermuda" Open
View article: Vertical variability of aerosol properties and trace gases over a remote marine region: A case study over Bermuda
Vertical variability of aerosol properties and trace gases over a remote marine region: A case study over Bermuda Open
Remote marine regions comprise a high fraction of Earth’s surface, but in-situ vertically-resolved measurements over these locations remain scarce. Here we use airborne data during 15 vertical spiral soundings (0.15 – 8.5 km) over Bermuda …
View article: Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer campaigns of ACTIVATE 2020: Life cycle, transport, and distribution
Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer campaigns of ACTIVATE 2020: Life cycle, transport, and distribution Open
The Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) is a six-year (2019–2024) NASA Earth-Venture Suborbital-3 (EVS-3) mission to robustly characterize aerosol-cloud-meteorology interactions over the w…
View article: Supplementary material to "Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer campaigns of ACTIVATE 2020: Life cycle, transport, and distribution"
Supplementary material to "Tropospheric aerosols over the western North Atlantic Ocean during the winter and summer campaigns of ACTIVATE 2020: Life cycle, transport, and distribution" Open
Section S1: Model evaluation with surface aerosol concentrations, deposition fluxes, and MODIS AOD observations In this section we evaluate model simulations with surface aerosol concentration observations from the IMPROVE and CSN networks…
View article: Retrieving UV–Vis spectral single-scattering albedo of absorbing aerosols above clouds from synergy of ORACLES airborne and A-train sensors
Retrieving UV–Vis spectral single-scattering albedo of absorbing aerosols above clouds from synergy of ORACLES airborne and A-train sensors Open
Inadequate knowledge about the complex microphysical and optical processes of the aerosol–cloud system severely restricts our ability to quantify the resultant impact on climate. Contrary to the negative radiative forcing (cooling) exerted…
View article: An overview of the Cloud and Aerosol Lidar for Global Scale Observations of the Ocean-Land-Atmosphere System
An overview of the Cloud and Aerosol Lidar for Global Scale Observations of the Ocean-Land-Atmosphere System Open
The Cloud and Aerosol Lidar for Global Scale Observations of the Ocean-Land-Atmosphere System (CALIGOLA) is an advanced multi-purpose space lidar mission with a focus on atmospheric and oceanic observation aimed at characterizing the Ocean…
View article: Comment on egusphere-2024-148
Comment on egusphere-2024-148 Open
Abstract. Mesoscale organization of marine convective clouds into linear or clustered states is prevalent across the tropical and subtropical oceans and its investigation served as a guiding focus for a series of process s…
View article: Supplementary material to "Measurement Report: Cloud and environmental properties associated with aggregated shallow marine cumulus and cumulus congestus"
Supplementary material to "Measurement Report: Cloud and environmental properties associated with aggregated shallow marine cumulus and cumulus congestus" Open
View article: Measurement Report: Cloud and environmental properties associated with aggregated shallow marine cumulus and cumulus congestus
Measurement Report: Cloud and environmental properties associated with aggregated shallow marine cumulus and cumulus congestus Open
Mesoscale organization of marine convective clouds into linear or clustered states is prevalent across the tropical and subtropical oceans and its investigation served as a guiding focus for a series of process study flights, conducted as …
View article: Comment on amt-2023-214
Comment on amt-2023-214 Open
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 the NASA Aerosol …
View article: Comment on amt-2023-214
Comment on amt-2023-214 Open
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 the NASA Aerosol …
View article: Satellite Lidar Measurements as a Critical New Global Ocean Climate Record
Satellite Lidar Measurements as a Critical New Global Ocean Climate Record Open
The year 2023 marked the tenth anniversary of the first published description of global ocean plankton stocks based on measurements from a satellite lidar. Diverse studies have since been conducted to further refine and validate the lidar …
View article: Retrievals of aerosol optical depth over the western North Atlantic Ocean during ACTIVATE
Retrievals of aerosol optical depth over the western North Atlantic Ocean during ACTIVATE Open
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 the NASA Aerosol Cloud meTeorology Interactions…
View article: Supplementary material to "HSRL-2 Retrievals of Ocean Surface Wind Speeds"
Supplementary material to "HSRL-2 Retrievals of Ocean Surface Wind Speeds" Open
View article: HSRL-2 Retrievals of Ocean Surface Wind Speeds
HSRL-2 Retrievals of Ocean Surface Wind Speeds Open
This study introduces and evaluates ocean surface wind speed retrieval capabilities of the High Spectral Resolution Lidar – generation 2 (HSRL-2) instrument through comparison with wind speed data collected by National Center for Atmospher…
View article: Comment on egusphere-2023-1717
Comment on egusphere-2023-1717 Open
Abstract. Inadequate knowledge about the complex microphysical and optical processes of the aerosol-cloud system severely restricts our ability to quantify the resultant impact on climate. Contrary to the negative radiativ…
View article: Retrieving UV-VIS Spectral Single-scattering Albedo of Absorbing Aerosols above Clouds from Synergy of ORACLES Airborne and A-train Sensors
Retrieving UV-VIS Spectral Single-scattering Albedo of Absorbing Aerosols above Clouds from Synergy of ORACLES Airborne and A-train Sensors Open
Inadequate knowledge about the complex microphysical and optical processes of the aerosol-cloud system severely restricts our ability to quantify the resultant impact on climate. Contrary to the negative radiative forcing (cooling) exerted…