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  • IFloodS 2013: A Field Campaign to Support the NASA-JAXA Global Precipitation Measurement Mission x
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Munir A. Nayak, Gabriele Villarini, and A. Allen Bradley

; Hou et al. 2014 ) core satellite. Our study focuses on atmospheric rivers (ARs) and rainfall during the IFloodS period. ARs are narrow (less than 400 km in width) and long (1000+ km in length) regions in the lower levels of the troposphere that transport large amounts of water vapor from the tropics and extratropics ( Newell et al. 1992 ; Newell and Zhu 1994 ). In extratropical cyclones, ARs generally form in the warm sector in the presence of low-level jets (LLJs) ahead of cold fronts. Because

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Haonan Chen, V. Chandrasekar, and Renzo Bechini

DPR and passive radiometer on board GPM extend the observation range attained by TRMM from tropics to most of the globe and provide accurate measurement of rainfall, snowfall, and other precipitation types. Through improved measurements of precipitation, the GPM mission is helping to advance our understanding of Earth’s water and energy cycle, as well as climate changes. As an indispensable part of the GPM mission, ground validation helps to develop the radar and radiometer retrieval algorithms by

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Young-Hee Ryu, James A. Smith, Mary Lynn Baeck, Luciana K. Cunha, Elie Bou-Zeid, and Witold Krajewski

vapor flux, and thermodynamic properties focus on this scale. It has been well documented that flooding events in the central United States are concentrated in late spring and early summer ( Wang and Chen 2009 ; Villarini et al. 2011a , b ; Smith et al. 2013 ) and that water vapor transported from the tropics is an important moisture source for precipitation and thus flooding events ( Rasmusson 1967 , 1968 , 1971 ; Trenberth and Guillemot 1996 ; Dirmeyer and Kinter 2010 ; Lavers and Villarini

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