Benjamin T. Johnson
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Toward Aerosol-Aware Thermal Infrared Radiance Data Assimilation Open
Aerosols considerably reduce the upwelling radiance in the thermal infrared (IR) window; thus, it is worthwhile to understand the effects and challenges of assimilating aerosol-affected (i.e., hazy-sky) IR observations for all-sky data ass…
Probabilistic Emulation of the Community Radiative Transfer Model Using Machine Learning Open
The continuous improvement in weather forecast skill over the past several decades is largely due to the increasing quantity of available satellite observations and their assimilation into operational forecast systems. Assimilating these o…
View article: Lysosome damage triggers acute formation of ER to lysosomes membrane tethers mediated by the bridge-like lipid transport protein VPS13C
Lysosome damage triggers acute formation of ER to lysosomes membrane tethers mediated by the bridge-like lipid transport protein VPS13C Open
Based on genetic studies, lysosome dysfunction is thought to play a pathogenetic role in Parkinson’s disease (PD). Here we show that VPS13C, a bridge-like lipid transport protein and a PD gene, is a sensor of lysosome stress/damage. Upon l…
View article: Physically Based Thermal Infrared Snow/Ice Surface Emissivity for Fast Radiative Transfer Models
Physically Based Thermal Infrared Snow/Ice Surface Emissivity for Fast Radiative Transfer Models Open
Accurate thermal infrared (TIR) fast-forward models are critical for weather forecasting via numerical weather prediction (NWP) satellite radiance assimilation and operational environmental data record (EDR) retrieval algorithms. The therm…
The Community Radiative Transfer Model (CRTM): Community-Focused Collaborative Model Development Accelerating Research to Operations Open
The Joint Center for Satellite Data Assimilation (JCSDA) Community Radiative Transfer Model (CRTM) is a fast, 1D radiative transfer model used in numerical weather prediction, calibration/validation, etc., across multiple federal agencies …
View article: Implementation of a Discrete Dipole Approximation Scattering Database Into Community Radiative Transfer Model
Implementation of a Discrete Dipole Approximation Scattering Database Into Community Radiative Transfer Model Open
The Community Radiative Transfer Model (CRTM) is a fast model that requires bulk optical properties of hydrometeors in the form of lookup tables to simulate all‐sky satellite radiances. Current cloud scattering lookup tables of CRTM were g…
Data assimilation for the Model for Prediction Across Scales – Atmosphere with the Joint Effort for Data assimilation Integration (JEDI-MPAS 1.0.0): EnVar implementation and evaluation Open
On 24 September 2021, JEDI-MPAS 1.0.0, a new data assimilation (DA) system for the Model Prediction Across Scales – Atmosphere (MPAS-A) built on the software framework of the Joint Effort for Data assimilation Integration (JEDI) was public…
Comment on gmd-2022-133 Open
Abstract. On 24 September 2021, JEDI-MPAS 1.0.0, a new data assimilation (DA) system for the Model Prediction Across Scales â Atmosphere (MPAS-A) built on the software framework of the Joint Effort for Data assimilation Integration (JE…
Comment on gmd-2022-133 Open
Abstract. On 24 September 2021, JEDI-MPAS 1.0.0, a new data assimilation (DA) system for the Model Prediction Across Scales â Atmosphere (MPAS-A) built on the software framework of the Joint Effort for Data assimilation Integration (JE…
Data Assimilation for the Model for Prediction Across Scales – Atmosphere with the Joint Effort for Data assimilation Integration (JEDI-MPAS 1.0.0): EnVar implementation and evaluation Open
On 24th September 2021, JEDI-MPAS 1.0.0, a new data assimilation (DA) system for the Model Prediction Across Scales – Atmosphere (MPAS-A) built on the software framework of the Joint Effort for Data assimilation Integration (JEDI), was pub…
Temperature-dependent optical constants of water in the thermal infrared derived from data archaeology Open
This paper describes a data archaeology and rescue of temperature-dependent thermal infrared (IR) optical constants for liquid water from previously published works. The data rescue is based upon digitization of a figure published by Pinkl…
The Aerosol Module in the Community Radiative Transfer Model (v2.2 and v2.3): accounting for aerosol transmittance effects on the radiance observation operator Open
The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sensors. We c…
The Influence of Aerosols on Satellite Infrared Radiance Simulations and Jacobians: Numerical Experiments of CRTM and GSI Open
For a variational data assimilation (DA) system that assimilates radiance observations, the simulated brightness temperature (BT) at the top of the atmosphere and the corresponding Jacobians carried out by the radiance observation operator…
View article: The Data Assimilation Research Testbed; a Suite of Tools for Understanding the Earth System with Confidence.
The Data Assimilation Research Testbed; a Suite of Tools for Understanding the Earth System with Confidence. Open
Society’s ability to make wise decisions depends onan accurate understanding of the current state of Earthand on an ability to predict future states.The Data Assimilation Research Testbed (DART) is an example of a suite of toolsdesigned to…
Temperature-Dependent Thermal IR Optical Constants of Water from Data Archaeology (v1.0) Open
Temperature-Dependent Thermal IR Optical Constants of Water from Data Archaeology (v1.0)OVERVIEW:These files contain temperature-dependent thermal IR optical constants of water derived from a data archaeology and rescue of reflectance data…
Sample data and fixed files for running 'fv3aerorad' in GSI Open
The tarball, "fv3aerorad.tar.gz", contains the sample data and fixed files to run the regression test, 'fv3aerorad', in community Gridpoint Statistical Interpolation (GSI; https://doi.org/10.5281/zenodo.5735601).
Sample data and fixed files for running 'fv3aerorad' in GSI Open
The tarball, "fv3aerorad.tar.gz", contains the sample data and fixed files to run the regression test, 'fv3aerorad', in community Gridpoint Statistical Interpolation (GSI; https://doi.org/10.5281/zenodo.5735601).
Comment on gmd-2021-145 Open
Abstract. The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sen…
The Aerosol Module in the Community Radiative Transfer Model (v2.2 and v2.3): accounting for aerosol transmittance effects on the radiance observation operator Open
The Community Radiative Transfer Model (CRTM), a sensor-based radiative transfer model, has been used within the Gridpoint Statistical Interpolation (GSI) system for directly assimilating radiances from infrared and microwave sensors. We c…
Towards a Mass-Consistent Methodology for Realistic Melting Hydrometeor Retrieval Open
To address the acute challenge posed by the melting layer to accurate surface precipitation retrievals from space, we ensure the compositional consistency in ice, liquid, and total masses of synthetic melting hydrometeors with a method of …
0.1-degree Parallel Ocean Program (POP) output for Eastern Equatorial Indian Ocean and Western Indonesia Open
This dataset includes regional subsets in the western Indonesian region of output from a run of the Parallel Ocean Program (POP) version 2, the ocean component of the Community Earth System Model (CESM). The model was run with nominal 0.1-…
Development of the Community Active Sensor Module (CASM): Forward Simulation Open
Modern data assimilation frameworks require sophisticated physical and radiative models to guide assimilation and interpretation of satellite-based observations. To date, satellite-based infrared and passive microwave radiances, in various…
System-Wide Water Resources Program Nutrient Sub-Model (SWWRP-NSM) version 1.1 Open
This report discusses major developments that have occurred since the release of NSM Version 1.0. These improvements were in the areas of: 1) partitioning of nutrients (dissolved and adsorbed) within surface runoff, 2) mass transfer of nut…
Establishment of the TREECS platform: a survey of existing tools, portals, and frameworks Open
PURPOSE: The Training Range Environmental Evaluation and Characterization System (TREECS) is being developed by the Environmental Laboratory of the U.S. Army Engineer Research and Development Center (ERDC) to provide a tool with varying le…
The microwave properties of simulated melting precipitation particles: sensitivity to initial melting Open
A simplified approach is presented for assessing the microwave response to the initial melting of realistically shaped ice particles. This paper is divided into two parts: (1) a description of the Single Particle Melting Model (SPMM), a he…