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  • IFloodS 2013: A Field Campaign to Support the NASA-JAXA Global Precipitation Measurement Mission x
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Luciana K. Cunha, James A. Smith, Witold F. Krajewski, Mary Lynn Baeck, and Bong-Chul Seo

the Next Generation Weather Radar (NEXRAD) network with dual-polarization (DP) capabilities. DP radars present many advantages over SP radars, including better characterization of hydrometeor types; enabling the identification of nonweather targets; the differentiation of rain, snow, and melting layer; and the detection of hail and heavy rain. These features allow the improvement of data quality control (QC) and QPE (e.g., Chandrasekar et al. 1990 ; Liu and Chandrasekar 2000 ; Illingworth et al

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Bong-Chul Seo, Brenda Dolan, Witold F. Krajewski, Steven A. Rutledge, and Walter Petersen

volume data (see, e.g., Kelleher et al. 2007 ) from NEXRAD that cover the IFloodS study area shown in Fig. 1 . The key differences in the structure and specifications between the IFC-SP and CSU-DP processing algorithms are presented and discussed to account for the observed similarities and discrepancies. We use high-quality, dense rain gauge networks that cover the Turkey River basin and the vicinity of the Iowa City area (see Fig. 1 ) as ground reference to assess the capability of the two RR

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Andrea Thorstensen, Phu Nguyen, Kuolin Hsu, and Soroosh Sorooshian

; Cao et al. 2006 ), snow-covered area ( Isenstein et al. 2015 ; Franz and Karsten 2013 ), and nitrogen concentration ( Bergström et al. 2002 ) in lieu of, or as a compliment to, calibrating to discharge. While significant progress has been made from these studies, challenges still remain regarding how best to leverage available observations for calibration. In an effort to accommodate the ever-growing need to represent subbasin processes, the development of distributed hydrologic and land surface

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Bong-Chul Seo, Witold F. Krajewski, Felipe Quintero, Mohamed ElSaadani, Radoslaw Goska, Luciana K. Cunha, Brenda Dolan, David B. Wolff, James A. Smith, Steven A. Rutledge, and Walter A. Petersen

quarter decimal minute (approximately 0.5 km). Seven NEXRAD radars (KEAX in Kansas City, Missouri; KFSD in Sioux Falls, South Dakota; KOAX in Omaha, Nebraska; and four more radars discussed earlier) are used to cover the entire state of Iowa, whereas the Q2 product is created with a 5-min and one-hundredth decimal degree (approximately 1 km) resolution over the entire United States. While the IFC uses a single NEXRAD Z – R equation ( Z = 300 R 1.4 ), the Q2 algorithm uses four different Z – R

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Huan Wu, Robert F. Adler, Yudong Tian, Guojun Gu, and George J. Huffman

miles downstream of the confluence is used as the approximate outlet of the entire ICRB (32 381 km 2 ) for this study. The study area has a climate with cold winters, hot summers, and wet springs. Both of the river basins have relatively simple land use/cover and surface morphology and are dominated by corn–soybean rotation agriculture during April–November, with fallow fields for the rest of the year. Fig . 1. Gridded mean annual precipitation (mm) according to the seven products from 1 Jan 2002 to

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Phu Nguyen, Andrea Thorstensen, Soroosh Sorooshian, Kuolin Hsu, and Amir AghaKouchak

). Climate change leads to an increase in precipitation intensity in many parts of the world, which may cause more severe floods ( Solomon et al. 2007 ). Fig . 1. Flood statistics from 1950 to 2010 using data from CRED. The primary driver of a regular flood over a region is extreme rainfall, while other types of floods can be caused by dam breaks, high tides, and snow melting. Many efforts have been made from various organizations across the world to prevent/mitigate the impact of floods on society

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Di Wu, Christa Peters-Lidard, Wei-Kuo Tao, and Walter Petersen

two-stream (upward and downward fluxes) approach is used for the shortwave and longwave radiative flux calculations ( Chou and Suarez 1999 ) and its explicit interactions with clouds (microphysics). In addition, the numerical simulations use the Goddard three-class ice (3ICE) scheme ( Lang et al. 2011 ), which prognoses three types of ice hydrometeor species (i.e., cloud ice, snow, and graupel). Fig . 2. NU-WRF grid configuration. The outer domain (labeled 1 at the center) has a horizontal

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Haonan Chen, V. Chandrasekar, and Renzo Bechini

was operated in several modes, including the two-sweep (i.e., 0.7° and 1.4°) full plan position indicator (PPI), RHIs over the APU disdrometers, PPI sector (PPS) scans of precipitation systems over principal river basins, and “bird bath” scans that can be used for monitoring Z dr biases. The RHI sector scans covered an azimuth range of 8° above locations of ground-based instrumentation (e.g., APU disdrometers). The PPI and RHI scan tasks were repeated once every 3 min when precipitation was

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