A5035894648- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Advanced Image Fusion Techniques
- Atmospheric and Environmental Gas Dynamics
- Remote-Sensing Image Classification
- Precipitation Measurement and Analysis
- Remote Sensing in Agriculture
- Icing and De-icing Technologies
- Climate change and permafrost
- Calibration and Measurement Techniques
- Power Systems and Technologies
- Arctic and Antarctic ice dynamics
- Heat Transfer and Boiling Studies
- Solar Radiation and Photovoltaics
- Remote Sensing and LiDAR Applications
- Smart Grid and Power Systems
- Climate variability and models
- Advanced Computational Techniques and Applications
- Advanced Sensor and Control Systems
- Spacecraft and Cryogenic Technologies
- Image and Signal Denoising Methods
- Power Systems and Renewable Energy
China Iron and Steel Research Institute Group
2024
Natural Resources Canada
2011-2024
Science Systems and Applications (United States)
2010-2023
Analytical Mechanics Associates (United States)
2023
Zhejiang International Studies University
2022
East University Of Heilongjiang
2010-2021
Yangtze Normal University
2011-2020
Shanghai Electric (China)
2014-2019
Canadian Association of Learned Journals
2019
Support Systems Associates (United States)
2010-2018
The National Aeronautics and Space Administration's Clouds the Earth's Radiant Energy System (CERES) Project was designed to improve our understanding of relationship between clouds solar longwave radiation. This is achieved using satellite broad-band instruments map top-of-atmosphere radiation fields with coincident data from narrow-band imagers employed retrieve properties associated those fields. paper documents CERES Edition-2 cloud property retrieval system used analyze Tropical...
The Edition 2 (Ed2) cloud property retrieval algorithm system was upgraded and applied to the MODerate-resolution Imaging Spectroradiometer (MODIS) data for Clouds Earth's Radiant Energy System (CERES) 4 (Ed4) products. New calibrations solar channels use of 1.24-μm channel optical depth (COD) over snow improve daytime consistency between Terra Aqua MODIS retrievals. Use additional spectral revised logic enhanced cloud-top phase accuracy. A new ice crystal reflectance model a CO <sub...
Methods to detect tropical deep convective clouds and overshooting from measurements at the three water vapor channels (183.3 ± 1, 183.3 3, 7 GHz) of Advanced Microwave Sounding Unit‐B (AMSU‐B) are presented. Thresholds for brightness temperature differences between suggested as criterion clouds, an order relation is used overshooting. The procedure based on investigation influence cloud systems microwave temperatures frequencies 89 220 GHz using simultaneous aircraft radar over two systems,...
The Clouds and Earth's Radiant Energy System (CERES) has been monitoring clouds radiation since 2000 using algorithms developed before 2002 for CERES Edition 2 (Ed2) products. To improve cloud amount accuracy, 4 (Ed4) applies revised input data to Terra Aqua MODerate-resolution Imaging Spectroradiometer (MODIS) radiances. Ed4 mask uses 5-7 additional channels, new models clear-sky ocean snow/ice-surface radiances, MODIS calibrations. Mean daytime nighttime amounts exceed their Ed2...
Canopy biophysical variables such as the fraction of canopy cover (fCOVER), absorbed photosynthetically active radiation (fAPAR), and leaf area index (LAI) are widely used for ecosystem modelling monitoring. The Sentinel-2 mission was designed systematic global mapping these at 20 m resolution using imagery from MultiSpectral Instrument. Simplified Level 2 Prototype Processor (SL2P) is available a baseline solution. Previous validation over limited sites indicates that SL2P generally...
The simplified ray-tracing technique reported in Part I of this paper is employed to compute the single-scattering properties hexagonal columns with maximum dimensions ranging from 2 3500 mum a size-bin resolution at wavelengths 0.86 and 2.13 mum. For small ice crystals, current treatment surface roughness may not be adequate because applicability principles geometric optics breaks down for scale. However, crystals smaller than 40 mum, aspect ratios these particles are close one, effect...
The single‐scattering properties of ice crystals are fundamental to the radiative transfer in clouds, which thereby basis for estimating optical and microphysical clouds. This study computes scattering absorption nonspherical clouds using discrete dipole approximation method at frequencies 89–340 GHz. Six crystal habits, including hexagonal column, hollow six‐branch bullet rosette, droxtal, aggregate, plate, ranging maximum dimensions from 2 5500 μ m, considered. sensitive their habits....
Surface roughness of ice crystals is a morphological parameter important to the scattering characteristics these particles. The intent this paper, reported in two parts (hereafter, Parts I and II), investigate accuracy associated with some simplifications calculating single-scattering properties roughened quantify effect surface on retrieval optical microphysical clouds from satellite observations. In Part I, ray-tracing schemes, rigorous algorithm an approximate simplified treatment...
Ice cloud particles exhibit a range of shapes and sizes affecting cloud’s single-scattering properties. Because they cannot be inferred from passive visible/infrared imager measurements, assumptions about the bulk properties ice clouds are fundamental to satellite retrievals broadband radiative flux calculations. To examine sensitivity particle model assumptions, three sets models used in fraction, thermodynamic phase, optical depth, effective height, size, top-of-atmosphere (TOA) surface...
Abstract Retrieval of ice cloud properties using IR measurements has a distinct advantage over the visible and near‐IR techniques by providing consistent monitoring regardless solar illumination conditions. Historically, bands at 3.7, 6.7, 11.0, 12.0 µm have been used to infer parameters various methods, but reliable retrieval optical depth τ is limited nonopaque cirrus with < 8. The Ice Cloud Optical Depth from Infrared Neural network (ICODIN) method developed in this paper training...
Metal-organic networks (MONs) is a family of chemical compounds consisting clusters or metal ions and organic ligands. These are studied as one, two three dimensional structures porous materials subclasses coordination polymers. MONs mostly used in catalysis for the separation & purification gases conducting solids super-capacitors. In some situations, these found to be stable process removal solvent guest molecules could restored with other compounds. The physical stability mechanical...
Since the coming of Positive Psychology in field second language acquisition (SLA), significance emotion, especially positive has been well recognized by researchers. Educational research indicated that both emotion and engagement play fundamental roles learning process psychological wellbeing, but on their relationship is scant SLA. The present study contributed to development SLA investigating relationships between achievement emotions, behavioral engagement, self-reported English...
This paper reports on the comparison of two latest versions (collections 4 and 5) ice cloud products derived from Moderate Resolution Imaging Spectroradiometer (MODIS) measurements. The differences between bulk optical properties clouds used in collections 5 relevant impact simulating correlation bidirectional reflection functions at MODIS bands centered 0.65 (or 0.86) 2.13 mum are investigated. level-3 (specifically, fraction, thickness, effective particle size this paper) collection...
The inference of ice cloud properties from spaceborne sensors is sensitive to the retrieval algorithms and satellite used. To approach a better understanding properties, it necessary combine measurements multiple platforms operating in visible, infrared, millimeter submillimeter‐wave regions electromagnetic spectrum. single‐scattering particles with consistent particle models are basis for estimating optical microphysical clouds sensors. In this study, (extinction efficiency, absorption...
Synthetic aperture radar (SAR) imaging can be a feasible alternative or complement to traditional optical remote sensing techniques because it does not depend on solar illumination and weather conditions. The high spatial resolution of SAR, such as the Intermap STAR-3i airborne SAR image with 1.25 m resolution, makes applicable for mapping purposes. However, difficulties sometimes exist in interpretation images. Image fusion presents an improve interpretability images by fusing color...
Abstract This study surveys the optical and microphysical properties of high (ice) clouds over Tropics (30°S–30°N) a 3-yr period from September 2002 through August 2005. The analyses are based on gridded level-3 cloud products derived measurements acquired by Moderate Resolution Imaging Spectroradiometer (MODIS) instruments aboard both NASA Earth Observing System Terra Aqua platforms. present analysis is MODIS collection-4 data products. provide daily, weekly, monthly mean fraction,...
Abstract Soil temperature observations in permafrost regions are sparse, which limits our understanding and ability to map conditions at high spatial resolutions. In this study, we measured near‐surface soil temperatures (Tnss) 107 sites from August 2016 2017 northern boreal tundra areas northwestern Canada. Active‐layer thickness (ALT), vegetation were also these sites. Our show large variations Tnss ALT across an area with a similar climate. This degree of heterogeneity illustrates the...
The millimeter wavelength radar backscattering properties at 94 GHz for six nonspherical ice crystals, which include hexagonal column, hollow, plate, bullet rosette, aggregate, and droxtal with 46 maximum dimensions ranging from 2 to 10,500 μ m, are investigated using the discrete dipole approximation (DDA) method Lorenz‐Mie theory. It is found that cross sections sensitive crystal habits their representations, use spherical particles equivalent dimension, volume, projected area, or ratio of...