polarimetric@in hydrometeorology

jan 2003- sep 2010

Showing: 1 - 20 of 26

 

The Utility of X-Band Polarimetric Radar for Quantitative Estimates of Rainfall Parameters

Sergey Y. Matrosov, David E. Kingsmill, Brooks E. Martner, F. Martin Ralph

Journal of Hydrometeorology

Volume 6, Issue 3 (June 2005) pp. 248-262

Abstract

The utility of X-band polarimetric radar for quantitative retrievals of rainfall parameters is analyzed using observations collected along the U.S. west coast near the mouth of the Russian River during the Hydrometeorological Testbed project ...

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High-Resolution Rainfall Estimation from X-Band Polarimetric Radar Measurements

Emmanouil N. Anagnostou, Marios N. Anagnostou, Witold F. Krajewski, Anton Kruger, Benjamin J. Miriovsky

Journal of Hydrometeorology

Volume 5, Issue 1 (February 2004) pp. 110-128

Abstract

The paper presents a rainfall estimation technique based on algorithms that couple, along a radar ray, profiles of horizontal polarization reflectivity (ZH), differential reflectivity (ZDR), and differential propagation phase shift (ƒ³DP) from X-...

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An Algorithm for Real-Time Rainfall Rate Estimation by Using Polarimetric Radar: RIME

Francesco Silvestro, Nicola Rebora, Luca Ferraris

Journal of Hydrometeorology

Volume 10, Issue 1 (February 2009) pp. 227-240

Abstract

Polarimetric radars provide measurements that describe the shape and dimensions of hydrometeors and are unaffected by calibration, attenuation, and the presence of ice. These measurements can potentially lead to a more detailed description of ...

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Impacts of Polarimetric Radar Observations on Hydrologic Simulation

Jonathan J. Gourley, Scott E. Giangrande, Yang Hong, Zachary L. Flamig, Terry Schuur, Jasper A. Vrugt

Journal of Hydrometeorology

Volume 11, Issue 3 (June 2010) pp. 781-796

doi: 10.1175/2010JHM1218.1

Abstract

Rainfall estimated from the polarimetric prototype of the Weather Surveillance Radar-1988 Doppler [WSR-88D (KOUN)] was evaluated using a dense Micronet rain gauge network for nine events on the Ft. Cobb research watershed in Oklahoma. The ...

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POLARIMETRIC RADAR OBSERVATIONS OF CONVECTION IN NORTHWESTERN MEXICO DURING THE NORTH AMERICAN MONSOON EXPERIMENT

Timothy J. Lang, Steven A. Rutledge, Robert Cifelli

Journal of Hydrometeorology

Volume 0, Issue 0 ( ) pp.

doi: 10.1175/2010JHM1247.1

Abstract

The spatial and temporal variability of convection during the North American Monsoon Experiment (NAME) was examined via analysis of three-dimensional polarimetric radar data. Terrain bands were defined by the Gulf of California (over water), ...

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NASA Cold Land Processes Experiment (CLPX 2002/03): Airborne Remote Sensing

Don Cline, Simon Yueh, Bruce Chapman, Boba Stankov, Al Gasiewski, Dallas Masters, Kelly Elder, Richard Kelly, Thomas H. Painter, Steve Miller, Steve Katzberg, Larry Mahrt

Journal of Hydrometeorology

Volume 10, Issue 1 (February 2009) pp. 338-346

Abstract

This paper describes the airborne data collected during the 2002 and 2003 Cold Land Processes Experiment (CLPX). These data include gamma radiation observations, multi- and hyperspectral optical imaging, optical altimetry, and passive and active ...

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Raindrop Size Distributions and Rain Characteristics in California Coastal Rainfall for Periods with and without a Radar Bright Band

Brooks E. Martner, Sandra E. Yuter, Allen B. White, Sergey Y. Matrosov, David E. Kingsmill, F. Martin Ralph

Journal of Hydrometeorology

Volume 9, Issue 3 (June 2008) pp. 408-425

Abstract

Recent studies using vertically pointing S-band profiling radars showed that coastal winter storms in California and Oregon frequently do not display a melting-layer radar bright band and inferred that these nonbrightband (NBB) periods are ...

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Comparison of Two Raindrop Size Distribution Retrieval Algorithms for X-Band Dual Polarization Observations

Marios N. Anagnostou, Emmanouil N. Anagnostou, Jothiram Vivekanandan, Fred L. Ogden

Journal of Hydrometeorology

Volume 9, Issue 3 (June 2008) pp. 589-600

Abstract

In this study the authors evaluate two algorithms, the so-called beta (ƒΐ) and constrained methods, proposed for retrieving the governing parameters of the gnormalizedh gamma drop size distribution (DSD) from dual-polarization radar measurements. ...

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Precipitation Measurement at CESAR, The Netherlands

H. Leijnse, R. Uijlenhoet, C. Z. van de Beek, A. Overeem, T. Otto, C. M. H. Unal, Y. Dufournet, H. W. J. Russchenberg, J. Figueras I. Ventura, H. Klein Baltink, I. Holleman

Journal of Hydrometeorology

Volume 0, Issue 0 ( ) pp.

doi: 10.1175/2010JHM1245.1

Abstract

The Cabauw Experimental Site for Atmospheric Research (CESAR) observatory hosts a unique collection of instruments related to precipitation measurement. The data collected by these instruments are stored in a database that is freely accessible ...

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Evaluation of AMSR-E-Derived Soil Moisture Retrievals Using Ground-Based and PSR Airborne Data during SMEX02

M. F. McCabe, H. Gao, E. F. Wood

Journal of Hydrometeorology

Volume 6, Issue 6 (December 2005) pp. 864-877

Abstract

A Land Surface Microwave Emission Model (LSMEM) is used to derive soil moisture estimates over Iowa during the Soil Moisture Experiment 2002 (SMEX02) field campaign, using brightness temperature data from the Advanced Microwave Sounding ...

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Comparison of Rain Gauge Measurements in the Mid-Atlantic Region

Ali Tokay, Paul G. Bashor, Victoria L. McDowell

Journal of Hydrometeorology

Volume 11, Issue 2 (April 2010) pp. 553-565

doi: 10.1175/2009JHM1137.1

Abstract

A comparative study of daily and monthly rainfall between research and operational gauges was conducted at the mid-Atlantic region. Fifty research tipping-bucket gauges were deployed to 20 sites where each site had dual or triple gauges. The ...

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Characterization of Errors in a Coupled Snow Hydrology–Microwave Emission Model

Konstantinos M. Andreadis, Ding Liang, Leung Tsang, Dennis P. Lettenmaier, Edward G. Josberger

Journal of Hydrometeorology

Volume 9, Issue 1 (February 2008) pp. 149-164

Abstract

Traditional approaches to the direct estimation of snow properties from passive microwave remote sensing have been plagued by limitations such as the tendency of estimates to saturate for moderately deep snowpacks and the effects of mixed land ...

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Toward a Global Map of Raindrop Size Distributions. Part I: Rain-Type Classification and Its Implications for Validating Global Rainfall Products

Tristan S. L'Ecuyer, Christian Kummerow, Wesley Berg

Journal of Hydrometeorology

Volume 5, Issue 5 (October 2004) pp. 831-849

Abstract

Variability in the global distribution of precipitation is recognized as a key element in assessing the impact of climate change for life on earth. The response of precipitation to climate forcings is, however, poorly understood because of ...

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Variability of Raindrop Size Distributions in a Squall Line and Implications for Radar Rainfall Estimation

Remko Uijlenhoet, Matthias Steiner, James A. Smith

Journal of Hydrometeorology

Volume 4, Issue 1 (February 2003) pp. 43-61

Abstract

The intrastorm variability of raindrop size distributions as a source of uncertainty in single-parameter and dual-parameter radar rainfall estimates is studied using time series analyses of disdrometer observations. Two rain-rate (R) estimators ...

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NASA Cold Land Processes Experiment (CLPX 2002/03): Local Scale Observation Site

Janet Hardy, Robert Davis, Yeohoon Koh, Don Cline, Kelly Elder, Richard Armstrong, Hans-Peter Marshall, Thomas Painter, Gilles Castres Saint-Martin, Roger DeRoo, Kamal Sarabandi, Tobias Graf, Toshio Koike, Kyle McDonald

Journal of Hydrometeorology

Volume 9, Issue 6 (December 2008) pp. 1434-1442

Abstract

The local scale observation site (LSOS) is the smallest study site (0.8 ha) of the 2002/03 Cold Land Processes Experiment (CLPX) and is located within the Fraser mesocell study area. It was the most intensively measured site of the CLPX, and ...

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Evaluation of Incremental Improvements to Quantitative Precipitation Estimates in Complex Terrain

Jonathan J. Gourley, David P. Jorgensen, Sergey Y. Matrosov, Zachary L. Flamig

Journal of Hydrometeorology

Volume 10, Issue 6 (December 2009) pp. 1507-1520

Abstract

Advanced remote sensing and in situ observing systems employed during the Hydrometeorological Testbed experiment on the American River basin near Sacramento, California, provided a unique opportunity to evaluate correction procedures applied to ...

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An Automated Radar Technique for the Identification of Tropical Precipitation

Xiaoyong Xu, Kenneth Howard, Jian Zhang

Journal of Hydrometeorology

Volume 9, Issue 5 (October 2008) pp. 885-902

Abstract

A radar-based automated technique for the identification of tropical precipitation was developed to improve quantitative precipitation estimation during extreme rainfall events. The technique uses vertical profiles of reflectivity to identify the ...

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The Soil Moisture–Atmosphere Coupling Experiment (SMACEX): Background, Hydrometeorological Conditions, and Preliminary Findings

William P. Kustas, Jerry L. Hatfield, John H. Prueger

Journal of Hydrometeorology

Volume 6, Issue 6 (December 2005) pp. 791-804

Abstract

The Soil Moisture–Atmosphere Coupling Experiment (SMACEX) was conducted in conjunction with the Soil Moisture Experiment 2002 (SMEX02) during June and July 2002 near Ames, Iowa—a corn and soybean production region. The primary objective of SMEX02 ...

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A real-time algorithm for the correction of bright band effects in radar-derived QPE

Jian Zhang, Youcun Qi

Journal of Hydrometeorology

Volume 0, Issue 0 ( ) pp.

doi: 10.1175/2010JHM1201.1

Abstract

The bright band (BB) is a layer of enhanced reflectivity due to melting of aggregated snow and ice crystals. The locally high reflectivity causes significant overestimation in radar precipitation estimates if appropriate correction is not ...

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A Method for Evaluating the Accuracy of Quantitative Precipitation Estimates from a Hydrologic Modeling Perspective

Jonathan J. Gourley, Baxter E. Vieux

Journal of Hydrometeorology

Volume 6, Issue 2 (April 2005) pp. 115-133

Abstract

A major goal in quantitative precipitation estimation and forecasting is the ability to provide accurate initial conditions for the purposes of hydrologic modeling. The accuracy of a streamflow prediction system is dependent upon how well the ...

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Coastal Orographic Rainfall Processes Observed by Radar during the California Land-Falling Jets Experiment

Allen B. White, Paul J. Neiman, F. Martin Ralph, David E. Kingsmill, P. Ola G. Persson

Journal of Hydrometeorology

Volume 4, Issue 2 (April 2003) pp. 264-282

Abstract

Radar and rain gauge observations collected in coastal mountains during the California Land-Falling Jets Experiment (CALJET) are used to diagnose the bulk physical properties of rainfall during a wet winter season (January–March 1998). Three ...

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Evaluation of PERSIANN-CCS Rainfall Measurement Using the NAME Event Rain Gauge Network

Yang Hong, David Gochis, Jiang-tao Cheng, Kuo-lin Hsu, Soroosh Sorooshian

Journal of Hydrometeorology

Volume 8, Issue 3 (June 2007) pp. 469-482

Abstract

Robust validation of the space–time structure of remotely sensed precipitation estimates is critical to improving their quality and confident application in water cycle–related research. In this work, the performance of the Precipitation ...

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Evaluation of RadVil, a Radar-Based Very Short-Term Rainfall Forecasting Model

Brice Boudevillain, Hervé Andrieu, Nadine Chaumerliac

Journal of Hydrometeorology

Volume 7, Issue 1 (February 2006) pp. 178-189

Abstract

A very short-term rainfall forecast model is tested on actual radar data. This model, called RadVil, takes advantages of voluminal radar data through vertically integrated liquid (VIL) water content measurements. The model is tested on a dataset ...

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Using a Microwave Emission Model to Estimate Soil Moisture from ESTAR Observations during SGP99

Huilin Gao, Eric F. Wood, Matthias Drusch, Wade Crow, Thomas J. Jackson

Journal of Hydrometeorology

Volume 5, Issue 1 (February 2004) pp. 49-63

Abstract

The 1999 Southern Great Plains Hydrology Experiment (SGP99) provides comprehensive datasets for evaluating microwave remote sensing of soil moisture algorithms that involve complex physical properties of soils and vegetation. The Land Surface ...

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The Hydrometeorology of a Deforested Region of the Amazon Basin

Renato Ramos da Silva, Roni Avissar

Journal of Hydrometeorology

Volume 7, Issue 5 (October 2006) pp. 1028-1042

Abstract

A series of numerical simulations were performed to evaluate the capability of the Regional Atmospheric Modeling System (RAMS) to simulate the evolution of convection in a partly deforested region of the Amazon basin during the rainy season, and ...

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A Microwave Satellite Observational Operator for Variational Data Assimilation of Soil Moisture

Andrew S. Jones, Tomislava Vukićević, Thomas H. Vonder Haar

Journal of Hydrometeorology

Volume 5, Issue 1 (February 2004) pp. 213-229

Abstract

An observational operator and its adjoint have been created that are suitable for use within variational data assimilation using polarized 6- and 10-GHz passive microwave satellite observations. When used within a variational data assimilation ...

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