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Chunmei Zhu and Dennis P. Lettenmaier

extremity of the much more pronounced NAMS phenomenon over northwestern Mexico). A key to understanding this predictability is datasets that support analyses of land–atmosphere interactions. The dataset described in this paper arises from this motivation. To date, data that will support land–atmosphere feedback studies within the NAMS region, particularly land surface states and fluxes such as soil moisture and turbulent heat fluxes, have been essentially nonexistent. This is a result mostly of the

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Paquita Zuidema, Chris Fairall, Leslie M. Hartten, Jeffrey E. Hare, and Daniel Wolfe

measurements were gathered by a wind profiler, a ceilometer, and a flux system. The turbulent fluxes presented in this paper were obtained through bulk aerodynamic methods ( Fairall et al. 1996b ), but measurements allowing for more accurate direct covariance calculations at a later date were also gathered. Radiative fluxes came from redundant, calibrated pyranometers and pyrgeometers ( Fairall et al. 1998 ). The vertically pointing 915-MHz wind profiler provided continuous profiles of wind in the lower

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Myong-In Lee, Siegfried D. Schubert, Max J. Suarez, Isaac M. Held, Arun Kumar, Thomas L. Bell, Jae-Kyung E. Schemm, Ngar-Cheung Lau, Jeffrey J. Ploshay, Hyun-Kyung Kim, and Soo-Hyun Yoo

: Diurnal and semidiurnal variations in the time series of 3-hourly assimilated precipitation by NASA GEOS-1. J. Climate , 13 , 2923 – 2940 . Lin , X. , D. A. Randall , and L. D. Fowler , 2000 : Diurnal variability of the hydrological cycle and radiative fluxes: Comparisons between observations and a GCM. J. Climate , 13 , 4159 – 4179 . Machado , L. A. T. , H. Laurent , and A. A. Lima , 2002 : The diurnal march of the convection observed during TRMM-WETAMC/LBA. J. Geophys

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Mekonnen Gebremichael, Enrique R. Vivoni, Christopher J. Watts, and Julio C. Rodríguez

increased interest is the need to fill the gap between the large scales of meteorological model outputs and the smaller hydrological scales. Discrepancies in scale also arise when remote sensing estimates are compared to point measurements for validation. Studies have documented the importance of small-scale rainfall variability on runoff simulation ( Ogden and Julien 1993 , 1994 ; Winchell et al. 1998 ), radiative transfer computations ( Harris et al. 2003 ), estimation of land–atmosphere fluxes

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