Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Precipitation radar"”.
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Cross validation of observations from the GPM dual-frequency precipitation radar and dual-polarization S-band ground radars
… observations and various products of the Global Precipitation Measurement (GPM) Mission Satellite with dual polarization S-Band Ground Radars. The GPM mission is a joint venture by the NASA and the JAXA. The radar on board the core observatory is a dual-frequency precipitation radar (DPR) capable …
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Improving active remote sensing retrievals of snowfall at microwave wavelengths: an emphasis on the global precipitation measurement mission’s dual-frequency precipitation radar
… Thus, the retrieval of snowfall from spaceborne radars that can sample remote regions of the world is invaluable for both atmospheric and climate sciences. One spaceborne radar capable of measuring snowfall is the Global Precipitation Measurement mission’s Dual-frequency Precipitation Radar …
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Microwave Remote Sensing of Saharan Ergs and Amazon Vegetation
… of the Sahara desert and the Amazon vegetation. Radar and radiometric responses of the Saharan ergs are related to geophysical properties of sand formations and near surface winds. The spatial and temporal variability of the Amazon vegetation is studied using multi-frequency and …
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Extreme rainfall intensities and long-term rainfall risk from tropical cyclones
… The statistical component is estimated using precipitation radar (PR) data from the TRMM mission. Taylor's hypothesis is used to convert spatial rainfall intensity fluctuations to temporal fluctuations at a given location A. The combined physical-statistical model gives the distribution of the …
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Radiative feedbacks in tropical organized convection and the Madden-Julian oscillation
… using spaceborne satellites and ground-based precipitation radar, along with combined products and reanalyses. The main findings in each chapter are summarized as follows: (1) higher sea surface temperature and stronger low-level wind shear strength enhance tropical mesoscale convective …
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Dependence of tropical cirrus clouds on sea surface temperature and consequences for the Archean climate
… sea surface temperature (SST) and convective precipitation fraction and stratiform rainfall area from radar observations of precipitation, using data from the Kwajalein atoll ground-based radar as well as the precipitation radar on board of the Tropical Rainfall Measurement Mission (TRMM …
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A Wind and Rain Backscatter Model Derived from AMSR and SeaWinds Data
… surface roughening and the normalized radar backscatter cross-section. Recently, an algorithm for simultaneously retrieving wind and rain (SWR) from scatterometer measurements was developed that enables SeaWinds to correct rain-corrupted wind measurements and retrieve rain rate data. …
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Analysis of precipitation and convection in the west Pacific during the PISTON field campaign
… board the PISTON ships was the SEA-POL weather radar, the first polarimetric weather radar designed specifically for deployment at sea. In addition to taking traditional radar measurements of precipitation intensity and velocity, SEA-POL's polarimetric measurements also provide insights into the …
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On the role of warm rain clouds in the tropics
… and with rainwater estimates from the TRMM Precipitation Radar (PR). This algorithm is novel in that it takes into account the water in the rain and retrieves the LWP due to only the cloud water in a raining cloud, thus allowing the investigation of the effects of precipitation on cloud …
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Tropical orographic rainfall regimes according to the tropical rainfall measuring mission
Observing precipitation in tropical regions of complex terrain is a challenging problem. While ground-based instrumentation including rain gauge networks and radar data offer some insights, the lack of spatially complete gauge networks and radar artifacts such as severe beam blockage lead to large …
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Investigation of the positive interaction between the primary and secondary circulation and the roles of different types of precipitation in tropical cyclone formation
… primary circulation, secondary circulation and precipitation during tropical cyclogenesis through analyses of satellite data and cloud-representing numerical model simulations. Previous studies have emphasized the importance of the positive feedback between the ocean surface heat fluxes and the …
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Aerosol Optical Depth And Its Relationship To Radar Derived Precipitation In Mali, West Africa
… exists between Aerosol Optical Depth (AOD) and radar-derived precipitation in Mali, a country located in West Africa. Precipitation parameters derived from 2006, 2007 and 2008 C-band radar measurements are compared against Noon to 2 p.m. averaged AOD measurements. The AOD and Angstrom Exponent …
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Characterization and modeling of aerosol-cloud interactions toward the improvement of rainfall estimation in high mountains
<p>In high elevated regions, ground-based precipitation measurements are scarce or non-existing. Remote sensing estimates are prone to underestimation due to a lack of sensitivity to light precipitation and ground-clutter contamination of radar signals by steep terrain. The latter creates a blind …
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Cross-validation of spaceborne radar and ground polarimetric radar observations
There is great potential for spaceborne weather radar to make significant observations of the precipitating medium on global scales. Unlike other instruments, such as light detecting and ranging (lidar) systems that operate in the optical region, and thermatic mapping systems that use short …
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Modification of Precipitation in Mid-Latitude Cyclones Passing over a Coastal Mountain Range
… range, the processes producing their clouds and precipitation are modified, leading to considerable spatial variability in precipitation amount and composition. Surface, radar, and aircraft observations from the 2015-16 Olympic Mountains Experiment (OLYMPEX) field campaign and realistic, …