Search Results

You are looking at 1 - 7 of 7 items for :

  • The Global Energy and Water Cycle Experiment (GEWEX) x
  • All content x
Clear All
Xi Chen, Yongqin David Chen, and Zhicai Zhang

groundwater model of the U.S. Geological Survey, has a modular structure and open environment ( McDonald and Harbaugh 1988 ). It was selected for the model integration in order to link its three packages for simulating water exchanges between aquifer and other hydrological components (i.e., recharge, evapotranspiration, and river) with the soil moisture model and streamflow routing algorithms. The modeling system was calibrated in the Linhuanji catchment of the Huaihe River basin to estimate surface

Full access
Richard G. Lawford, John Roads, Dennis P. Lettenmaier, and Phillip Arkin

algorithm of land surface evaporation. J. Geophys. Res. , 108 . 4270, doi:10.1029/2002JD002062 . Nunes, A. M. B. , and Roads J. O. , 2007 : Influence of precipitation assimilation on a regional climate model’s surface water and energy budgets. J. Hydrometeor. , 8 , 642 – 664 . 10.1175/JHM615.1 Ohta, T. , Suzuki K. , Kodama Y. , Kubota J. , Kominami Y. , and Nakai Y. , 1999 : Characteristics of the heat balance above the canopies of evergreen and deciduous forests during the

Full access
Xubin Zeng and Aihui Wang

Coauthors , 2002 : The land surface climatology of the community land model coupled to the NCAR Community Climate Model. J. Climate , 15 , 3123 – 3149 . 10.1175/1520-0442(2002)015<3123:TLSCOT>2.0.CO;2 Brunke, M. A. , Zhou M. , Zeng X. , and Andreas E. L. , 2006 : An intercomparison of model bulk aerodynamic algorithms used over sea ice with data from the SHEBA experiment. J. Geophys. Res. , 111 . C09001, doi:10.1029/2005JC002907 . Chen, T. H. , and Coauthors , 1997 : Cabauw

Full access
Yefim L. Kogan, Zena N. Kogan, and David B. Mechem

-speed-dependent fraction of the total variance calculated over a 30-s sampling time. With these methods to constrain the turbulent component under development and improvement, in this study we concentrate not on the retrieval algorithm itself but on assessment of the retrieval errors and the relative informational weight of different intrinsic microphysical parameters. Specifically we will assess contributions from the Doppler velocity V d and the Doppler spectral width σ d . For the intrinsic microphysical

Full access
Scott Curtis, Ahmed Salahuddin, Robert F. Adler, George J. Huffman, Guojun Gu, and Yang Hong

hydrometeors, which is better related to rainfall than cloud-top properties on which the OPI depends. To determine the frequency of extreme events over a season, daily precipitation averages were calculated from TRMM Multisatellite Precipitation Analysis (TMPA; TRMM standard product number 3B42, version 6; Huffman et al. 2007 ). The TMPA has a nominal resolution of 3 h and extends from 1 January 1998 to the near present. The TMPA algorithm uses the TRMM Combined Instrument (TRMM Precipitation Radar and

Full access
Xia Zhang, Shu Fen Sun, and Yongkang Xue

Picard iteration algorithm, proposed by Celia et al. (1990) , is extended to solve Eq. (1) but with consideration of phase changes in our model. The Picard iteration method is generally believed to be superior to the Newton iteration method in computational efficiency and conservation for the mixed-form Richards’ equation ( Huang et al. 1998 ). Hansson et al. (2004) applied this iteration scheme for the mixed-form Richards’ equation and found that it performs very well, but in their study, no

Full access
Ana M. B. Nunes and John O. Roads

1995 at the NASA Langley Web page. (More information is available online at http://eosweb.larc.nasa.gov .) The SW and LW fluxes are derived using Pinker and Laszlo (1992) and Fu et al. (1997) algorithms, respectively. The SW models used clear-sky top-of-atmosphere albedo from the Earth Radiation Budget Experiment (ERBE). The cloud properties were taken from the International Satellite Cloud Climatology Project (ISCCP) DX data. The Goddard Earth Observing System-1 (GEOS-1) data assimilation

Full access