A5023451926- Precipitation Measurement and Analysis
- Meteorological Phenomena and Simulations
- Climate variability and models
- Soil Moisture and Remote Sensing
- Geophysics and Gravity Measurements
- Tropical and Extratropical Cyclones Research
- Cryospheric studies and observations
- Flood Risk Assessment and Management
- Atmospheric aerosols and clouds
- Hydrological Forecasting Using AI
- Radio Wave Propagation Studies
- Atmospheric Ozone and Climate
- Image Processing and 3D Reconstruction
- Oceanographic and Atmospheric Processes
- Water Quality Monitoring Technologies
- Ocean Waves and Remote Sensing
- Computational Physics and Python Applications
- Methane Hydrates and Related Phenomena
- Radiative Heat Transfer Studies
- Geological and Geophysical Studies
- Heat Transfer and Optimization
- Environmental and Agricultural Sciences
- Wind and Air Flow Studies
- Arctic and Antarctic ice dynamics
- Remote Sensing and LiDAR Applications
Kyoto University
2014-2024
Osaka Prefecture University
2005-2010
Goddard Space Flight Center
2007
Japan Aerospace Exploration Agency
2004
Prevention Institute
1999
This paper documents the production and validation of retrieved rainfall data obtained from satellite-borne microwave radiometers by Global Satellite Mapping Precipitation (GSMaP) Project. Using various attributes precipitation derived Tropical Rainfall Measuring Mission (TRMM) satellite data, GSMaP has implemented hydrometeor profiles Radar (PR), statistical rain/no-rain classification, scattering algorithms using polarization-corrected temperatures (PCTs) at 85.5 37 GHz. Combined...
A system has been developed and implemented that integrates passive microwave radiometer data with infrared in order to have high temporal (1 hour) spatial (0.1 degree) resolution global precipitation estimates. The product (GSMaP_MVK) is produced based on a Kalman filter model refines the rate propagated atmospheric moving vector derived from two successive IR images. proposed method was evaluated compared other high-resolution products ground-based collected by Automated Meteorological...
This paper describes a precipitation-retrieval algorithm for the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) that was developed under Global Satellite Mapping of Precipitation project (GSMaP) by improving authors' previous algorithm. The basic idea GSMaP is to find optimal precipitation which brightness temperatures (TBs) calculated radiative-transfer model (RTM) fit best with observed TBs. main improvements over work are as follows: (1) use precipitation-related...
Abstract Heavy rainfall associated with shallow orographic systems has been underestimated by passive microwave radiometer algorithms owing to weak ice scattering signatures. The authors improve the performance of estimates made using a algorithm, Global Satellite Mapping Precipitation (GSMaP) from data obtained Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) for heavy rainfall. An orographic/nonorographic classification scheme is developed on basis orographically forced...
Global rainfall products of high spatial and temporal resolutions have been provided using combined data from passive microwave (PMW) sensors in low Earth orbit infrared (IR) radiometers geostationary (GEO). This study compared six satellite estimates around Japan with reference to a ground-radar dataset calibrated by rain gauges the Meteorological Agency (JMA) January through December 2004. Validation results tended be better for interpolation based upon morphed technique GEO IR...
An algorithm, the spectral latent heating (SLH) has been developed to estimate profiles for Tropical Rainfall Measuring Mission precipitation radar with a cloud-resolving model (CRM). Heating-profile lookup tables three rain types—convective, shallow stratiform, and anvil (deep stratiform melting level)—were produced numerical simulations of tropical cloud systems in Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment. For convective regions, table refers precipitation-top...
Rainfall is a fundamental process within the Earth's hydrological cycle because it represents principal forcing term in surface water budgets, while its energetics corollary, latent heating, source of atmospheric diabatic heating well into middle latitudes. Latent heat production itself consequence phase changes between vapor, liquid, and frozen states water. The properties vertical distribution release modulate large-scale meridional zonal circulations Tropics, as modify energetic...
Abstract The spectral latent heating (SLH) algorithm was developed for the Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) in Part I of this study. method uses PR information [precipitation-top height (PTH), rates at surface and melting level, rain type] to select profiles from lookup tables. Heating-profile tables three types—convective, shallow stratiform, anvil (deep stratiform with a level)—were derived numerical simulations tropical cloud systems Ocean Global...
Abstract Three-dimensional distributions of the apparent heat source (Q1) − radiative heating (QR) estimated from Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) utilizing spectral latent (SLH) algorithm are analyzed. Mass-weighted and vertically integrated Q1 QR averaged over tropical oceans is as ∼72.6 J s−1 (∼2.51 mm day−1) that land ∼73.7 (∼2.55 for 30°N–30°S. It shown nondrizzle precipitation subtropical consists two dominant modes rainfall systems: deep systems...
Abstract Capitalizing on recently released reanalysis datasets and diabatic heating estimates based Tropical Rainfall Measuring Mission (TRMM), the authors have conducted a composite analysis of vertical anomalous structures associated with Madden–Julian oscillation (MJO). Because lies at heart prevailing MJO theories, intention this effort is to provide new insights into fundamental physics MJO. However, some discrepancies in profiles are noted among datasets, particularly between three...
Rainfall over the coastal regions of western India [Western Ghats (WG)] and Myanmar [Arakan Yoma (AY)], two experiencing heaviest rainfall during Asian summer monsoon, is examined using a Tropical Measuring Mission (TRMM) Precipitation Radar (PR) dataset spanning 16 years. maxima are identified on upslope WG coastline AY, in contrast to offshore locations observed previous studies. Continuous rain with slight nocturnal afternoon–evening occurs WG, while an afternoon peak morning just off...
Abstract Yanai and coauthors utilized the meteorological data collected from a sounding network to present pioneering work in 1973 on thermodynamic budgets, which are referred as apparent heat source (Q1) moisture sink (Q2). Latent heating (LH) is one of most dominant terms Q1. Yanai’s paper motivated development satellite-based LH algorithms provided theoretical background for imposing large-scale advective forcing into cloud-resolving models (CRMs). These CRM-simulated Q1 have been used...
Abstract The relationship among surface rainfall, its intensity, and associated stratiform amount is established by examining observed precipitation data from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR). results show that for moderate–high fractions, rain probabilities are strongly skewed toward light intensities. For convective-type rain, peak probability of occurrence shifts to higher intensities but still significantly weaker rates. main differences between...
Abstract This study aims to evaluate the consistency and discrepancies in estimates of diabatic heating profiles associated with precipitation based on satellite observations microphysics those derived from thermodynamics large-scale environment. It presents a survey profile four Tropical Rainfall Measuring Mission (TRMM) products, global reanalyses, situ sounding measurements eight field campaigns at various tropical locations. Common most are following: (i) bottom-heavy profiles,...
Precipitation is one of the most important resources for human activity, and global distribution precipitation amount its change are essential data modeling water cycle energy cycle. Space-borne Passive Microwave Radiometers (PMRs) working on many satellites. PMR observes emission scattering from provide uniform data. The Global Satellite Mapping Moving Vector with Kalman-filter (GSMaP_MVK) estimates hourly 0.1 degree gridded map PMRs. Because land radiometrically warm region, estimation...
Abstract Over coastal mountain ranges of the Asian monsoon region, heavy orographic rainfall is frequently associated with low precipitation-top heights (PTHs). This leads to conspicuous underestimation using microwave radiometer algorithms, which conventionally assume that high PTHs. Although topographically forced upward motion important for occurrence, it does not fully constrain precipitation profiles in this region. paper focuses on thermodynamic characteristics atmosphere determine...
Abstract The spectral latent heating (SLH) algorithm was developed to estimate profiles for the Tropical Rainfall Measuring Mission Precipitation Radar (TRMM PR). method uses TRMM PR information (precipitation-top height, precipitation rates at surface and melting level, rain type) select from lookup tables (LUTs). LUTs three types—convective, shallow stratiform, anvil (deep stratiform with a level)—were derived numerical simulations of tropical cloud systems Ocean Global Atmosphere Coupled...
Abstract Latent heating (LH) from precipitation systems with different sizes, depths, and convective intensities is quantified 15 years of LH retrievals version 7 Precipitation Radar (PR) products the Tropical Rainfall Measuring Mission (TRMM). Organized systems, such as mesoscale (MCSs; area > 2000 km2), contribute to 88% above km over tropical land 95% oceans. mainly precipitation, has one vertical mode a peak 4 km. There are two modes The shallow about 1 results small, shallow,...
Abstract The authors improve the high-resolution Global Satellite Mapping of Precipitation (GSMaP) product for Typhoon Morakot (2009) over Taiwan by using an orographic/nonorographic rainfall classification scheme. For estimation orographically forced upward motion used in scheme, optimal horizontal length scale averaging elevation data is examined and found to be about 50 km. It inferred that as air ascends en masse on scale, it becomes unstable convection develops. scheme extended GSMaP...
Abstract An orographic/nonorographic rainfall classification scheme has been introduced for the operational algorithm of Global Satellite Mapping Precipitation (GSMaP) passive microwave radiometers. However, problems overestimations and false alarms heavy orographic remain unresolved. This is because current selected lower constant thresholds conditions global application used values orographically forced upward motion w derived from near-surface atmospheric data. study improves conceptual...