A5075199648- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Marine and coastal ecosystems
- Calibration and Measurement Techniques
- Aeolian processes and effects
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Climate variability and models
- Cryospheric studies and observations
- Oceanographic and Atmospheric Processes
- Solar Radiation and Photovoltaics
- Ocean Waves and Remote Sensing
- Precipitation Measurement and Analysis
- Thermal Radiation and Cooling Technologies
- Arctic and Antarctic ice dynamics
- Icing and De-icing Technologies
- Advanced Optical Sensing Technologies
- Optical Polarization and Ellipsometry
- Spectroscopy and Laser Applications
- Tropical and Extratropical Cyclones Research
- Orbital Angular Momentum in Optics
- Infrared Target Detection Methodologies
Langley Research Center
2016-2025
National Aeronautics and Space Administration
2017-2025
Shandong University of Technology
2022-2025
Hebei GEO University
2023-2025
Office of Multidisciplinary Activities
2025
Wuhan National Laboratory for Optoelectronics
2025
Huazhong University of Science and Technology
2025
Leonardo (United Kingdom)
2024
Chongqing Municipal Health Commission
2024
Shanghai Jiao Tong University
2024
Abstract The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) is a two-wavelength polarization lidar that performs global profiling of aerosols and clouds in the troposphere lower stratosphere. CALIOP primary instrument on Infrared Pathfinder Satellite Observations (CALIPSO) satellite, which has flown formation NASA A-train constellation satellites since May 2006. global, multiyear dataset obtained from provides new view earth’s atmosphere will lead to an improved understanding role...
Abstract Descriptions are provided of the aerosol classification algorithms and extinction-to-backscatter ratio (lidar ratio) selection schemes for Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) products. One year CALIPSO level 2 version data analyzed to assess veracity aerosol-type identification algorithm generate vertically resolved distributions types their respective optical characteristics. To robustness algorithm, interannual variability is by using a fixed...
Abstract. The Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) version 4.10 (V4) level 2 aerosol data products, released in November 2016, include substantial improvements to the subtyping and lidar ratio selection algorithms. These are described along resulting changes optical depth (AOD). most fundamental change V4 products is a new algorithm identify subtypes stratosphere. Four introduced for stratospheric aerosols: polar (PSA), volcanic ash, sulfate/other, smoke. tropospheric...
A new parameterization of the radiative properties water clouds is presented. Cloud optical for both solar and terrestrial spectra cloud equivalent radii in range 2.5–60 µm are calculated from Mie theory. It found that depend mainly on radius throughout spectrum insensitive to details droplet size distribution, such as shape, skewness, width, modality (single or bimodal). This suggests models, aimed at predicting evolution microphysics with climate change, it sufficient determine third...
The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite will be launched in April of 2005, make continuous measurements the Earth's atmosphere for following three years. Retrieving spatial optical properties clouds aerosols from CALIPSO lidar backscatter data confronted by a number difficulties that are not faced analysis ground-based data. Among these very large distance target, high speed at which traverses ground track, ensuing low signal-to-noise ratios...
The CALIOP depolarization measurements, combined with backscatter intensity are effective in discriminating between water clouds and ice clouds. same measurements can also be used for estimating liquid content information. Using cloud temperature information from the collocated infrared imaging radiometer paths MODIS this study compiles global statistics of occurrence frequency, content, path, their dependence. For temperatures −40°C 0°C, phase fractions significantly higher than ones...
Summertime Tibetan dust aerosol plumes are detected from the Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite. CALIPSO reveals that storms occur more frequently than previously found surface observations because few sites were available over remote northwestern Tibet due to high elevation harsh climate. The is characterized by column‐averaged volume depolarization total color ratios around 21% 0.83, respectively. layers appear most 4–7 km above mean sea...
Abstract The current cloud thermodynamic phase discrimination by Cloud-Aerosol Lidar Pathfinder Satellite Observations (CALIPSO) is based on the depolarization of backscattered light measured its lidar [Cloud-Aerosol with Orthogonal Polarization (CALIOP)]. It assumes that from ice crystals depolarizing, whereas water clouds, being spherical, result in minimal depolarization. However, because relationship between CALIOP field view (FOV) and large distance satellite clouds frequent presence...
The single-scattering properties of ice particles in the near- through far-infrared spectral region are computed from a composite method that is based on combination finite-difference time-domain technique, T-matrix method, an improved geometrical-optics and Lorenz-Mie theory. Seven nonspherical crystal habits (aggregates, hexagonal solid hollow columns, plates, bullet rosettes, spheroids, droxtals) considered. A database for each these has been developed at 49 wavelengths between 3 100...
An extensive dust storm originating on 17 August 2006 in North Africa was observed and tracked by the Cloud‐Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) lidar. Over next several days, layer moved westward across Atlantic Ocean into Gulf of Mexico. The initial stages event were examined using a sequence CALIPSO measurements. first these acquired very near source 18 August. Successive measurements made over 19 20 August, at respective locations approximately ∼1300 km...
Abstract. The dust aerosol radiative forcing and heating rate over the Taklimakan Desert in Northwestern China July 2006 are estimated using Fu-Liou transfer model along with satellite observations. vertical distributions of extinction coefficient derived from CALIPSO (Cloud-Aerosol Lidar Infrared Pathfinder Satellite Observations) lidar measurements. CERES (Cloud Earth's Energy Budget Scanner) measurements reflected solar radiation used to constrain type model, which determines...
Abstract This study summarizes recent improvements in the development of bulk scattering/absorption models at solar wavelengths. The approach combines microphysical measurements from various field campaigns with single-scattering properties for nine habits including droxtals, plates, solid/hollow columns, bullet rosettes, and several types aggregates. Microphysical are incorporated a number both Northern Southern Hemisphere. A set 12 815 particle size distributions is used which T cld ≤...
Abstract An overview of Sun–Sky Radiometer Observation Network (SONET) measurements in China is presented. Based on observations at 16 distributed SONET sites China, atmospheric aerosol parameters are acquired via standardization processes operational measurement, maintenance, calibration, inversion, and quality control implemented since 2010. A climatology study performed focusing total columnar characteristics, including optical (aerosol depth, ÅngstrÖm exponent, fine-mode fraction,...
The North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) is an interdisciplinary investigation to improve understanding of Earth's ocean ecosystem-aerosol-cloud system. Specific overarching science objectives for NAAMES are (1) characterize plankton ecosystem properties during primary phases the annual cycle their dependence on environmental forcings, (2) determine how these interact recreate each year conditions bloom, (3) resolve remote marine aerosols boundary layer clouds...
Significance Enhancement of aerosol that can nucleate cloud droplets increases the droplet number concentration and albedo clouds. This amount sunlight reflected to space. Uncertainty in how aerosol−cloud interactions over industrial period have increased planetary by this mechanism leads significant uncertainty climate projections. Our work presents a method for observationally constraining change due anthropogenic emissions: hemispheric difference remotely sensed between pristine Southern...
SPECIALTY GRAND CHALLENGE article Front. Remote Sens., 24 February 2021 | https://doi.org/10.3389/frsen.2021.619818
The semi‐direct effects of dust aerosols are analyzed over eastern Asia using 2 years (June 2002 to June 2004) data from the Clouds and Earth's Radiant Energy System (CERES) scanning radiometer MODerate Resolution Imaging Spectroradiometer (MODIS) on Aqua satellite, 18 (1984 2001) International Satellite Cloud Climatology Project (ISCCP) data. results show that water path dust‐contaminated clouds is considerably smaller than dust‐free clouds. mean ice (IWP) liquid (LWP) dusty less their...
The effects of dust storms on cloud properties and Radiative Forcing (RF) are analyzed over Northwestern China from April 2001 to June 2004 using data collected by the MODerate Resolution Imaging Spectroradiometer (MODIS) Clouds Earth's Radiant Energy System (CERES) instruments Aqua Terra satellites. On average, ice effective particle diameter, optical depth water path cirrus clouds under polluted conditions 11%, 32.8%, 42% less, respectively, than those derived in dust‐free atmospheric...
Abstract This study examines the development of bulk single-scattering properties ice clouds, including albedo, asymmetry factor, and phase function, for a set 1117 particle size distributions obtained from analysis First International Satellite Cloud Climatology Project Regional Experiment (FIRE)-I, FIRE-II, Atmospheric Radiation Measurement Program intensive observation period, Tropical Rainfall Measuring Mission Kwajalein (KWAJEX), Cirrus Study Anvils Layers (CRYSTAL) Florida Area (FACE)...
Using measurements obtained by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, relationships between layer-integrated depolarization ratio (delta) attenuated backscatter (gamma) are established for moderately thick clouds of both ice water. A new simple form delta-gamma relation spherical particles, developed from Monte Carlo simulations suitable water aerosol is found to agree well with observations. high-backscatter, low-depolarization...