A Real-Time Algorithm for Merging Radar QPEs with Rain Gauge Observations and Orographic Precipitation Climatology

AbstractHigh-resolution, accurate quantitative precipitation estimation (QPE) is critical for monitoring and prediction of flash floods and is one of the most important drivers for hydrological forecasts. Rain gauges provide a direct measure of precipitation at a point, which is generally more accurate than remotely sensed observations from radar and satellite. However, high-quality, accurate precipitation gauges are expensive to maintain, and their distributions are too sparse to capture gradients of convective precipitation that may produce flash floods. Weather radars provide precipitation observations with significantly higher resolutions than rain gauge networks, although the radar reflectivity is an indirect measure of precipitation and radar-derived QPEs are subject to errors in reflectivity–rain rate (Z–R) relationships. Further, radar observations are prone to blockages in complex terrain, which often result in a poor sampling of orographically enhanced precipitation. The current study aims at a ...

[1]  M. Dettinger,et al.  Historical and National Perspectives on Extreme West Coast Precipitation Associated with Atmospheric Rivers during December 2010 , 2012 .

[2]  Alexander V. Ryzhkov,et al.  Calibration Issues of Dual-Polarization Radar Measurements , 2005 .

[3]  P. Tabary,et al.  The New French Operational Radar Rainfall Product. Part I: Methodology , 2007 .

[4]  Urs Germann,et al.  Mesobeta Profiles to Extrapolate Radar Precipitation Measurements above the Alps to the Ground Level , 2002 .

[5]  S. Yuter,et al.  Kinematic and Thermodynamic Structures of Sierra Barrier Jets and Overrunning Atmospheric Rivers during a Landfalling Winter Storm in Northern California , 2013 .

[6]  Jian Zhang,et al.  Weather Radar Coverage over the Contiguous United States , 2002 .

[7]  J. Hay,et al.  High-resolution studies of rainfall on Norfolk Island: Part II: Interpolation of rainfall data , 1998 .

[8]  U. Haberlandt,et al.  Spatial interpolation of hourly rainfall - effect of additional information, variogram inference and storm properties , 2010 .

[9]  A. Ryzhkov,et al.  Estimation of Rainfall Based on the Results of Polarimetric Echo Classification , 2007 .

[10]  J. McGinley,et al.  Improving QPE and Very Short Term QPF: An Initiative for a Community-Wide Integrated Approach , 2007 .

[11]  A. Waldvogel,et al.  Raindrop Size Distribution and Sampling Size Errors , 1969 .

[12]  Christian Berndt,et al.  Geostatistical merging of rain gauge and radar data for high temporal resolutions and various station density scenarios , 2014 .

[13]  Jian Zhang,et al.  National mosaic and multi-sensor QPE (NMQ) system description, results, and future plans , 2011 .

[14]  Jian Zhang,et al.  A real‐time automated convective and stratiform precipitation segregation algorithm in native radar coordinates , 2013 .

[15]  A. Dégre,et al.  Different methods for spatial interpolation of rainfall data for operational hydrology and hydrological modeling at watershed scale: a review , 2013 .

[16]  Marc Berenguer,et al.  Geostatistical radar-raingauge combination with nonparametric correlograms: methodological considerations and application in Switzerland , 2010 .

[17]  Uwe Haberlandt,et al.  Geostatistical interpolation of hourly precipitation from rain gauges and radar for a large-scale extreme rainfall event , 2007 .

[18]  C. Daly,et al.  A Statistical-Topographic Model for Mapping Climatological Precipitation over Mountainous Terrain , 1994 .

[19]  Jian Zhang,et al.  Radar-Based Quantitative Precipitation Estimation for the Cool Season in Complex Terrain: Case Studies from the NOAA Hydrometeorology Testbed , 2012 .

[20]  James W. Wilson,et al.  Radar Measurement of Rainfall—A Summary , 1979 .

[21]  C. Daly,et al.  Physiographically sensitive mapping of climatological temperature and precipitation across the conterminous United States , 2008 .

[22]  Y. Hong,et al.  Correction of Radar QPE Errors for Nonuniform VPRs in Mesoscale Convective Systems Using TRMM Observations , 2013 .

[23]  P. M. Austin,et al.  Relation between Measured Radar Reflectivity and Surface Rainfall , 1987 .

[24]  G. Wick,et al.  Satellite and CALJET Aircraft Observations of Atmospheric Rivers over the Eastern North Pacific Ocean during the Winter of 1997/98 , 2004 .

[25]  Dong-Jun Seo,et al.  The WSR-88D rainfall algorithm , 1998 .

[26]  U. Germann,et al.  Real‐time radar–rain‐gauge merging using spatio‐temporal co‐kriging with external drift in the alpine terrain of Switzerland , 2014 .

[27]  A. Comrie,et al.  The North American Monsoon , 1997 .

[28]  Alexander V. Ryzhkov,et al.  The Hydrometeor Classification Algorithm for the Polarimetric WSR-88D: Description and Application to an MCS , 2009 .

[29]  Jian Zhang,et al.  A Real-Time Algorithm for the Correction of Brightband Effects in Radar-Derived QPE , 2010 .

[30]  J. Salas,et al.  A COMPARATIVE ANALYSIS OF TECHNIQUES FOR SPATIAL INTERPOLATION OF PRECIPITATION , 1985 .

[31]  M. Kitchen,et al.  Real-time correction of weather radar data for the effects of bright band, range and orographic growth in widespread precipitation , 1994 .

[32]  Laurent Delobbe,et al.  Evaluation of radar-gauge merging methods for quantitative precipitation estimates , 2009 .

[33]  Hervé Andrieu,et al.  Use of a weather radar for the hydrology of a mountainous area. Part II: radar measurement validation , 1997 .

[34]  Edward A. Brandes,et al.  Optimizing Rainfall Estimates with the Aid of Radar , 1975 .

[35]  Alexander V. Ryzhkov,et al.  Rainfall Estimation with a Polarimetric Prototype of WSR-88D , 2005 .

[36]  U. Germann,et al.  Radar precipitation measurement in a mountainous region , 2006 .

[37]  J. Jaime Gómez-Hernández,et al.  A non-parametric automatic blending methodology to estimate rainfall fields from rain gauge and radar data , 2009 .

[38]  Jian Zhang,et al.  Evaluation and Uncertainty Estimation of NOAA/NSSL Next-Generation National Mosaic Quantitative Precipitation Estimation Product (Q2) over the Continental United States , 2013 .