Comparison of ERA40 and NCEP/DOE near‐surface data sets with other ISLSCP‐II data sets

[1] The fields of 2-m temperature, relative humidity, precipitation, downward short-wave and long-wave radiation, net radiation, and sensible and latent heat flux from the ERA40 and NCEP/DOE reanalyses are compared with each other and with other independent ISLSCP-II data sets, where available. There are differences in the climatologies of the different data sets, but generally, they show consistent patterns of the major seasonal anomaly fields. The anomaly patterns are coherent, showing warm, dry seasonal biases associated with reduced precipitation and cloudiness, and the converse. This confirms that major changes in the atmospheric circulation patterns, with the associated differences in surface temperature, humidity, precipitation, cloud fields and incoming surface SW and LW radiation fluxes are captured by both reanalyses and the comparison ISLSCP-II data sets.

[1]  Alan K. Betts,et al.  Estimation of effective roughness length for heat and momentum from FIFE data , 1993 .

[2]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[3]  W. Rossow,et al.  Advances in understanding clouds from ISCCP , 1999 .

[4]  P. Jones,et al.  Representing Twentieth-Century Space-Time Climate Variability. Part II: Development of 1901-96 Monthly Grids of Terrestrial Surface Climate , 2000 .

[5]  A. K. Betts,et al.  O ine validation of the ERA 40 surface scheme , 2000 .

[6]  P. Dirmeyer,et al.  Comparison, Validation, and Transferability of Eight Multiyear Global Soil Wetness Products , 2004 .

[7]  Yann Kerr,et al.  The ISLSCP initiative I global datasets: Surface boundary conditions and atmospheric forcings for land-atmosphere studies , 1996 .

[8]  Jean-François Mahfouf,et al.  Evaluation of the Optimum Interpolation and Nudging Techniques for Soil Moisture Analysis Using FIFE Data , 2000 .

[9]  Alan K. Betts,et al.  Evaluation of the diurnal cycle of precipitation, surface thermodynamics, and surface fluxes in the ECMWF model using LBA data , 2002 .

[10]  Kyu-Tae Lee,et al.  Parameterizations for the Absorption of Solar Radiation by Water Vapor and Ozone , 1996 .

[11]  W. Collins,et al.  The NCEP–NCAR 50-Year Reanalysis: Monthly Means CD-ROM and Documentation , 2001 .

[12]  H. Pan,et al.  Interaction between soil hydrology and boundary-layer development , 1987 .

[13]  P. Jones,et al.  Representing Twentieth-Century Space–Time Climate Variability. Part I: Development of a 1961–90 Mean Monthly Terrestrial Climatology , 1999 .

[14]  Chung-Yu Wu,et al.  Technical report series on global modeling and data assimilation. Volume 6: A multiyear assimilation with the GEOS-1 system: Overview and results , 1995 .

[15]  A. Dai,et al.  Hydrometeorology of the Amazon in ERA-40 , 2005 .

[16]  Pedro Viterbo,et al.  Land-surface, boundary layer, and cloud-field coupling over the southwestern Amazon in ERA-40 , 2005 .

[17]  H. Pan,et al.  Nonlocal Boundary Layer Vertical Diffusion in a Medium-Range Forecast Model , 1996 .

[18]  A. Betts.  Radiative scaling of the nocturnal boundary layer and the diurnal temperature range , 2006 .

[19]  W. L. Darnell,et al.  A parameterization for longwave surface radiation from satellite data - Recent improvements , 1992 .

[20]  Kazuaki Kawamoto,et al.  Importance of aerosols in satellite‐derived estimates of surface shortwave irradiance over China , 2006 .

[21]  Pedro Viterbo,et al.  The European Summer of 2003: Sensitivity to Soil Water Initial Conditions , 2006 .

[22]  John Derber,et al.  The National Meteorological Center's spectral-statistical interpolation analysis system , 1992 .

[23]  J. Roads.  The NCEP–NCAR, NCEP–DOE, and TRMM Tropical Atmosphere Hydrologic Cycles , 2003 .

[24]  Naota Hanasaki,et al.  GSWP-2 Multimodel Analysis and Implications for Our Perception of the Land Surface , 2006 .

[25]  A. Betts,et al.  Evaluation of the ERA-40 Surface Water Budget and Surface Temperature for the Mackenzie River Basin , 2003 .

[26]  Cheng-Hsuan Lu,et al.  Evaluation of Soil Moisture in the NCEP-NCAR and NCEP-DOE Global Reanalyses , 2005 .

[27]  J. Janowiak,et al.  The Version 2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979-Present) , 2003 .

[28]  A. Sterl,et al.  The ERA‐40 re‐analysis , 2005 .

[29]  S. Hagemann,et al.  Validation of the hydrological cycle of ERA 40 , 2005 .

[30]  R. Pinker,et al.  Modeling Surface Solar Irradiance for Satellite Applications on a Global Scale , 1992 .

[31]  Pedro Viterbo,et al.  Impact of BOREAS on the ECMWF forecast model , 2001 .

[32]  Michael G. Bosilovich,et al.  Intercomparison of water and energy budgets for five Mississippi subbasins between ECMWF reanalysis (ERA‐40) and NASA Data Assimilation Office fvGCM for 1990–1999 , 2003 .

[33]  M. Kanamitsu,et al.  NCEP–DOE AMIP-II Reanalysis (R-2) , 2002 .

[34]  P. Xie,et al.  Global Precipitation: A 17-Year Monthly Analysis Based on Gauge Observations, Satellite Estimates, and Numerical Model Outputs , 1997 .

[35]  P. Dirmeyer,et al.  ISLSCP initiative II global data sets : Surface boundary conditions and atmospheric forcings for land-atmosphere studies , 2006 .

[36]  M. Kanamitsu,et al.  CSE Water and Energy Budgets in the NCEP–DOE Reanalysis II , 2002 .

[37]  Comparison of trends and variability in CRU, ERA-40 and NCEP/NCAR analyses of monthly-mean surface air temperature , 2004 .

[38]  D. Lettenmaier,et al.  Evaluation of the land surface water budget in NCEP/NCAR and NCEP/DOE reanalyses using an off‐line hydrologic model , 2001 .

[39]  Douglas A. Miller,et al.  GCIP water and energy budget synthesis (WEBS) , 2002 .