A5042369575- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Solar Radiation and Photovoltaics
- Meteorological Phenomena and Simulations
- Calibration and Measurement Techniques
- Aeolian processes and effects
- Planetary Science and Exploration
- Remote Sensing in Agriculture
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Spacecraft Design and Technology
- Spacecraft and Cryogenic Technologies
- Precipitation Measurement and Analysis
- Climate variability and models
- Methane Hydrates and Related Phenomena
- Geochemistry and Geologic Mapping
- Advanced Image Fusion Techniques
- Air Quality Monitoring and Forecasting
- Energy Load and Power Forecasting
- Vehicle emissions and performance
- Aerospace Engineering and Energy Systems
- Space Satellite Systems and Control
Tokai University
2016-2025
Matsumoto Livestock Hygiene Service Center
2025
Shibuya (Japan)
2005-2023
National Museum of Nature and Science
2019
Nippon Koei (Japan)
2019
Nishi Niigata Chuo National Hospital
2018
National Institute of Advanced Industrial Science and Technology
2017
Japan Aerospace Exploration Agency
1997-2016
The University of Tokyo
2004-2016
Earth and Space Research
2016
KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected standard assumptions about propagation at 99.95% C.L. In a 162 ton.yr exposure ratio observed inverse beta-decay to number without disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for energies >3.4 MeV. context two-flavor neutrino oscillations with CPT invariance, all solutions solar problem except "large mixing angle" region are excluded.
Abstract The collective representation within global models of aerosol, cloud, precipitation, and their radiative properties remains unsatisfactory. They constitute the largest source uncertainty in predictions climatic change hamper ability numerical weather prediction to forecast high-impact events. joint European Space Agency (ESA)–Japan Aerospace Exploration (JAXA) Earth Clouds, Aerosol Radiation Explorer (EarthCARE) satellite mission, scheduled for launch 2018, will help resolve these...
With a global aerosol transport‐radiation model coupled to general circulation model, changes in the meteorological parameters of clouds, precipitation, and temperature caused by direct indirect effects aerosols are simulated, its radiative forcing calculated. A microphysical parameterization diagnosing cloud droplet number concentration based on Köhler theory is introduced into which depends not only particle but also updraft velocity, size distributions, chemical properties each species...
A method for satellite remote sensing of cloud optical thickness and effective particle radius has been developed to apply NOAA AVHRR multispectral radiance data. Undesirable radiation components such as ground-reflected solar thermal are guessed from satellite-received radiances in channels 1, 3, 4 subtracted 1 3 derive the reflected a layer that includes information about microphysical properties. This can be applied broad range water clouds semitransparent thick clouds. was data acquired...
Optical properties of clouds and heavy aerosol retrieved from satellite measurements are the most important elements for calculating surface solar radiation (SSR). The Himawari-8/Advanced Himawari Imager (AHI) receive high spatial, temporal spectral signals, which provides an opportunity to estimate cloud, SSR accurately. In this study, we developed AHI official cloud property product (version 1.0) JAXA P-Tree system. A look-up table (LUT) method was used calculate high-temporal (10 min)...
The Japan Meteorological Agency (JMA) successfully launched the Himawari-8 (H-8) new-generation geostationary meteorological satellite with Advanced Himawari Imager (AHI) sensor on October 7, 2014. H-8/AHI level-2 (L2) operational cloud property products were released by Aerospace Exploration during September 2016. Voronoi light scattering model, which is a fractal ice particle habit, was utilized to develop retrieval algorithm called "Comprehensive Analysis Program for Cloud Optical...
Abstract Surface downward radiation (SDR), including shortwave (SWDR) and longwave (LWDR), is of great importance to energy climate studies. Considering the lack reliable SDR data with a high spatiotemporal resolution in East Asia–Pacific (EAP) region, we derived SWDR LWDR at 10-min 0.05° resolutions for this region from 2016 2020 based on next-generation geostationary satellite Himawari-8 ( H-8 ). The product unique terms its all-sky features, accuracy, high-resolution levels. cloud effect...
An algorithm is developed for determining the cloud optical thickness and effective particle radius simultaneously on a global scale using Advanced Very High Resolution Radiometer (AVHRR) multispectral radiance data. In algorithm, treatment of thermal radiation in Nakajima improved by reformulating emission atmospheric layers. At same time, lookup table parameterized terms equivalent water vapor path order to include effect various vertical profiles. The applied AVHRR data corresponding...
A new concept for cloud detection from observations by multispectral spaceborne imagers is proposed, and an algorithm comprising many pixel‐by‐pixel threshold tests developed. Since in nature the thickness of clouds tends to vary continuously border between clear sky thus vague, it unrealistic label pixels as either cloudy or sky. Instead, extraction ambiguous areas considered be useful informative. We refer multiple method employed MOD35 that used Moderate Resolution Imaging...
[1] This study developed an algorithm for estimating solar radiation from space using a neural network (NN) with improved learning to approximate radiative transfer code. The NN solver the budget is based on calculations. All data sets testing and training were generated Thus traces calculation that approximated by algorithm. To demonstrate effectiveness of approach high-speed estimation multiparameter problems, was applied geostationary satellite Sun-synchronous subrecurrent orbit...
Abstract. In this study, various ice particle habits are investigated in conjunction with inferring the optical properties of clouds for use Global Change Observation Mission-Climate (GCOM-C) satellite programme. We develop a database single-scattering five habit models: plates, columns, droxtals, bullet rosettes, and Voronoi. The is based on specification Second Generation Imager (SGLI) sensor board GCOM-C satellite, which scheduled to be launched 2017 by Japan Aerospace Exploration Agency....
Abstract Analysis of cloud cover and its diurnal variation over the Tibetan Plateau (TP) is highly reliant on satellite data; however, accuracy detection from both polar-orbiting geostationary satellites this area remains unclear. The new-generation Himawari-8 provide high-resolution spatial temporal information about clouds Plateau. In study, MODIS AHI investigated validated against CALIPSO measurements. For MODIS, false alarm rate in identification TP was 7.51% 1.94%, respectively, hit...
Abstract Surface downward solar radiation compositions (SSRC), including photosynthetically active (PAR), ultraviolet-A (UVA), ultraviolet-B (UVB), and shortwave (SWR), with high spatial–temporal resolutions precision are essential for applications power, vegetation photosynthesis, environmental health. In this study, an optimal algorithm was developed to calculate SSRC, their direct diffuse components. Key features of the include combining radiative transfer model machine learning...
Abstract The Greenhouse gases Observing SATellite 2 (GOSAT-2) was launched in October 2018 as a successor to GOSAT (launched 2009), the first satellite specialize greenhouse gas observations. Compared sensors, sensors of GOSAT-2 offer higher performance most respects. quality and quantity data from observations are expected be improved accordingly. signal-to-noise ratio (SNR) is better both SWIR TIR bands TANSO-FTS-2, which main sensor GOSAT-2. This improvement ultimately enhances accuracy...
Radiative forcings of aerosols and clouds in the East China Sea region are studied using data from surface radiation measurements, satellite remote sensing, model simulation conducted April 2001 as a study Asian Atmospheric Particle Environmental Change Studies (APEX) cooperating with International Global Chemistry (IGAC)/ACE‐Asia project. The monthly mean whole sky radiative forcing aerosol direct effect is derived various methods −5 to −8 W/m 2 at top atmosphere (TOA) −10 −23 Earth's Gosan...
Abstract This study describes an approach for combining CloudSat and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations to investigate the microphysical processes of warm clouds on global scale. MODIS column optical thickness is vertically distributed between cloud top bottom according adiabatic condensational growth assumptions used as a vertical coordinate system analyze profiles CloudSat-observed radar reflectivity. The reflectivity thus rescaled function...
Abstract Hydrometeor droplet growth processes are inferred from a combination of Aqua/Moderate Resolution Imaging Spectroradiometer (MODIS) cloud particle size observations and CloudSat/Cloud Profiling Radar (CPR) warm water clouds. This study supports the inferences related paper (Part I) (i) that MODIS-retrieved radii (CDR) 3.7-μm channel (R37) influenced by existence small droplets at top (ii) CDR obtained 1.6- (R16) 2.1-μm (R21) channels contain information about drizzle deeper into as...
Hydrospheric Atmospheric Research Center, Nagoya University, Nagoya, JapanNASA Goddard Space Flight Greenbelt, MarylandDepartment of Science, Colorado State Fort Collins, ColoradoAtmosphere and Ocean Institute, University Tokyo, Chiba, JapanEuropean Centre for Medium-Range Weather Forecasts, Reading, United KingdomFaculty Marine Technology, Tokyo Science JapanResearch Information Tokai JapanCORRESPONDING AUTHOR: Hirohiko Masunaga, F3-1(200) Furocho Chikusa-ku, 464-8601, Japan E-mail:...
Abstract This study examines the sensitivity of retrieved cloud droplet radii (CDR) to vertical inhomogeneity radii, including existence a drizzle mode in clouds. The focus this is warm water-phase Radiative transfer simulations three near-infrared Moderate Resolution Imaging Spectroradiometer (MODIS) channels centered on wavelengths 1.6, 2.1, and 3.7 μm reveal that CDR are strongly influenced by size (i) small droplets at top (ii) mode. influence smaller affects 3.7-μm channel most, whereas...
Abstract This study examines the warm rain formation process in global and regional cloud-resolving models. Methodologies developed to analyze CloudSat Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations are employed investigate cloud-to-precipitation processes applied model results for comparisons with corresponding statistics from observations. Three precipitation categories of no precipitation, drizzle, defined according nonattenuated near-surface radar...