K. L. Thornhill
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View article: In-cloud characteristics observed in northeastern and midwestern US non-orographic winter storms with implications for ice particle mass growth and residence time
In-cloud characteristics observed in northeastern and midwestern US non-orographic winter storms with implications for ice particle mass growth and residence time Open
The spatial distribution of surface snowfall accumulation is dependent on the 3D trajectories of ice particles and their residence times through regions of ice mass increases and decreases. We analyze 42 non-orographic, non-lake-effect win…
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: Supercooled Liquid Water at the Top of a Snow‐Producing Nimbostratus Cloud and Its Association With Gravity Wave Breaking and Turbulence: An IMPACTS Case Study
Supercooled Liquid Water at the Top of a Snow‐Producing Nimbostratus Cloud and Its Association With Gravity Wave Breaking and Turbulence: An IMPACTS Case Study Open
Supercooled liquid water (SLW) at the top of a snow‐producing nimbostratus cloud was thoroughly characterized with remote‐sensing and in situ measurements during the NASA Investigation of Microphysics and Precipitation for Atlantic Coast‐T…
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: On the Prediction of Aerosol‐Cloud Interactions Within a Data‐Driven Framework
On the Prediction of Aerosol‐Cloud Interactions Within a Data‐Driven Framework Open
Aerosol‐cloud interactions (ACI) pose the largest uncertainty for climate projection. Among many challenges of understanding ACI, the question of whether ACI can be deterministically predicted has not been explicitly answered. Here we atte…
View article: In-cloud characteristics observed in US Northeast and Midwest non-orographic winter storms with implications for ice particle mass growth and residence time
In-cloud characteristics observed in US Northeast and Midwest non-orographic winter storms with implications for ice particle mass growth and residence time Open
The spatial distribution of surface snowfall accumulation is dependent on the 3D trajectories of ice particles and their residence times through regions of ice mass increases and decreases. We analyze 42 non-orographic, non-lake effect win…
View article: Assessment of Landscape‐Scale Fluxes of Carbon Dioxide and Methane in Subtropical Coastal Wetlands of South Florida
Assessment of Landscape‐Scale Fluxes of Carbon Dioxide and Methane in Subtropical Coastal Wetlands of South Florida Open
Coastal wetlands play a significant role in the storage of “blue carbon,” indicating their importance in the carbon biogeochemistry in the coastal zone and in global climate change mitigation strategies. We present airborne eddy covariance…
View article: Closing the Gap: An Algorithmic Approach to Reconciling In-Situ and Remotely Sensed Aerosol Particle Properties
Closing the Gap: An Algorithmic Approach to Reconciling In-Situ and Remotely Sensed Aerosol Particle Properties Open
Remote sensors such as lidars and polarimeters are increasingly being used to understand atmospheric aerosol particles and their role in critical cloud and marine boundary layer processes. Therefore, it is essential to ensure these instrum…
View article: Bridging gas and aerosol properties between the northeastern US and Bermuda: analysis of eight transit flights
Bridging gas and aerosol properties between the northeastern US and Bermuda: analysis of eight transit flights Open
The western North Atlantic Ocean is strongly influenced by continental outflow, making it an ideal region to study the atmospheric transition from a polluted coastline to the marine environment. Utilizing eight transit flights between the …
View article: Comment on egusphere-2024-926
Comment on egusphere-2024-926 Open
Abstract. The western North Atlantic Ocean is strongly influenced by continental outflow, making it an ideal region to study the atmospheric transition from a polluted coastline to the marine environment. Utilizing eight t…
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: 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 egusphere-2024-926
Comment on egusphere-2024-926 Open
Abstract. The western North Atlantic Ocean is strongly influenced by continental outflow, making it an ideal region to study the atmospheric transition from a polluted coastline to the marine environment. Utilizing eight t…
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: 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: Supplementary material to "Bridging Gas and Aerosol Properties between Northeast U.S. and Bermuda: Analysis of Eight Transit Flights"
Supplementary material to "Bridging Gas and Aerosol Properties between Northeast U.S. and Bermuda: Analysis of Eight Transit Flights" Open
Table S1: Two-mode, lognormal model results for aerosol number concentration (N) for different bins of distance relative to LaRC.N1 represents the mode corresponding to the smaller Dp,g while N2 corresponds to the larger Dp,g.The bolded va…
View article: Bridging Gas and Aerosol Properties between Northeast U.S. and Bermuda: Analysis of Eight Transit Flights
Bridging Gas and Aerosol Properties between Northeast U.S. and Bermuda: Analysis of Eight Transit Flights Open
The western North Atlantic Ocean is strongly influenced by continental outflow, making it an ideal region to study the atmospheric transition from a polluted coastline to the marine environment. Utilizing eight transit flights between NASA…
View article: Process Modeling of Aerosol‐Cloud Interaction in Summertime Precipitating Shallow Cumulus Over the Western North Atlantic
Process Modeling of Aerosol‐Cloud Interaction in Summertime Precipitating Shallow Cumulus Over the Western North Atlantic Open
Process modeling of Aerosol‐cloud interaction (ACI) is essential to bridging gaps between observational analysis and climate modeling of aerosol effects in the Earth system and eventually reducing climate projection uncertainties. In this …
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: Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol
Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol Open
Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme Pyrocumulonimbus (PyroCB) events. We report field‐derived N 2 O 5 uptake coefficients, γ (N 2 O 5 ), an…
View article: Comment on egusphere-2023-3149
Comment on egusphere-2023-3149 Open
Abstract. Marine boundary-layer clouds play a critical role in the Earth’s energy balance. Their microphysical and radiative properties are highly impacted by ambient aerosols and dynamical forcings. In this study, we eval…
View article: Maximizing the Volume of Collocated Data from Two Coordinated Suborbital Platforms
Maximizing the Volume of Collocated Data from Two Coordinated Suborbital Platforms Open
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 to geographically collocate data from …
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: Water vapor measurements inside clouds and storms using a differential absorption radar
Water vapor measurements inside clouds and storms using a differential absorption radar Open
NASA's Vapor In-cloud Profiling Radar (VIPR) is a tunable G-band radar designed for in-cloud and precipitation humidity remote sensing. VIPR estimates humidity using the differential absorption radar (DAR) technique. This technique exploit…
View article: Understanding Aerosol-Cloud Interactions in a Single-Column Model: Intercomparison with Process-Level Models and Evaluation against ACTIVATE Field Measurements
Understanding Aerosol-Cloud Interactions in a Single-Column Model: Intercomparison with Process-Level Models and Evaluation against ACTIVATE Field Measurements Open
Marine boundary-layer clouds play a critical role in the Earth’s energy balance. Their microphysical and radiative properties are highly impacted by ambient aerosols and dynamical forcings. In this study, we evaluate the representation of …
View article: Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol
Airborne Observations Constrain Heterogeneous Nitrogen and Halogen Chemistry on Tropospheric and Stratospheric Biomass Burning Aerosol Open
Heterogeneous chemical cycles of pyrogenic nitrogen and halides influence tropospheric ozone and affect the stratosphere during extreme pyrocumulonimbus (PyroCB) events. We report field-derived N2O5 uptake coefficients, γ(N2O5), and ClNO2 …