Looking Back: Lessons Learned from CALIPSO Validation
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remote sensing↗
Engineering topics
Dave Winker
Publications and source records attributed to Dave Winker.
Intercomparison of Three Active Sensor Global Ice Cloud Products
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Dave Winker↗
CALIPSO and the Next 17 Years of Space Lidar
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Dave Winker↗
CALIPSO and What Comes Next
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Dave Winker↗
Uncertainties in an Observation-Based Estimate of the Global Aerosol Direct Radiative Effect
Aerosols impact Earth’s radiation budget directly through interactions with radiation and indirectly via interactions with clouds. Aerosols have significant radiative impacts on Earth’s energy budget and represent the largest uncertainty in the radiative forcing of the current climate. Although the magnitude of the aerosol direct radiative effect (DRE) is estimated to be less than that of the indirect effect, uncertainties are large. While model-based estimates of aerosol radiative forcing are subject to uncertainties in modeled aerosol properties and uncertainties in simulated cloud cover and albedo, most observation-based studies of global aerosol DRE have their own difficulties with aerosol optical properties and have been limited to cloud-free skies in most cases. Estimates of the uncertainty of the aerosol DRE are themselves uncertain and have varied widely among different published studies. In this study we use the CERES-CALIPSO-CloudSat-MODIS (C3M) product to estimate the global clear-sky and all-sky aerosol DRE. C3M merges collocated data from CERES, CALIPSO, CloudSat, and MODIS with information from reanalysis and an aerosol transport model. With CALIOP observations of aerosol below optically thin clouds and above clouds, co-located with cloud albedo from MODIS, the C3M dataset allows a detailed exploration of observational uncertainties. By perturbing the aerosol properties used and comparing radiative effects in perturbed cases with the base case we characterize uncertainties in estimated aerosol DRE due to uncertainties in the aerosol properties involved. The results also provide a basis for determining measurement requirements to improve the accuracy of DRE estimates. We will describe the approach and present results.
Dave Winker↗
A Look Back at CALIPSO
The CALIPSO mission terminated science operations in the summer of 2023 aftercompleting17 years of on-orbit observations. CALIPSO observations have provided a new perspective on clouds and aerosol and have far exceeded the original objectives of the mission. Many unanticipated findings and data applications were discovered. Flying as part of the A-train constellation stimulated the discovery of numerous retrieval synergies between lidar and other sensors in the A-train. This paper takes a look back at the development of the CALIPSO mission concept and some of the challenges that faced the team.
satellite lidar↗
Evolution of the CALIOP Aerosol Typing Algorithm
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Dave Winker↗
CALIPSO Final Data Product Status
The CALIPSO project is preparing for the end of the mission in October 2025. In this poster we provide detailed summaries of each final data products that will be released, a concise description of the changes between each of these final products and their previous versions, and a target release schedule. A summary of all of the steps that will be carried outby the CALIPSO project during the remainder of the mission for long term data discoverability and accessibility will also be provided.
Brian Getzewich↗