The ECMWF re-analysis for the AMMA observational campaign

被引:42
作者
Agusti-Panareda, Anna [1 ]
Beljaars, Anton [1 ]
Ahlgrimm, Maike [1 ]
Balsamo, Gianpaolo [1 ]
Bock, Olivier [2 ]
Forbes, Richard [1 ]
Ghelli, Anna [1 ]
Guichard, Francoise [3 ,4 ]
Keohler, Martin [1 ]
Meynadier, Remi [2 ]
Morcrette, Jean-Jacques [1 ]
机构
[1] ECMWF, Reading RG2 9AX, Berks, England
[2] Univ Paris 06, CNRS, LATMOS, Paris, France
[3] CNRS, CNRM, Toulouse, France
[4] Meteo France, Toulouse, France
关键词
West African monsoon; water cycle; energy budget; radiosonde; GLOBAL 4DVAR ASSIMILATION; AFRICAN MONSOON; AMSU OBSERVATIONS; IMPACTS; REGION; CLOUDS;
D O I
10.1002/qj.662
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
During the 2006 African Monsoon Multidisciplinary Analysis (AMMA) field experiment, an unprecedented number of soundings were performed in West Africa. However, due to technical problems many of these soundings did not reach the Global Telecommunication System and therefore they could not be included in the operational numerical weather prediction (NWP) analyses. This issue, together with the realization that there was a significant bias in the radiosonde humidity, led to the conclusion that a re-analysis effort was necessary. This re-analysis was performed at the European Centre for Medium-Range Weather Forecasts (ECMWF) spanning the wet monsoon season of 2006 from May-September. The key features of the ECMWF AMMA re-analysis are presented, including the use of a newer model version with improved physics, all the AMMA radiosonde data available from the AMMA database and a new radiosonde humidity bias-correction scheme. Data-impact experiments show that there is a benefit from these observations, but also highlight large model physics biases over the Sahel that cause a short-lived impact of the observations on the model forecast. The AMMA re-analysis is compared with independent observations to investigate the biases in the different parts of the physics. In the framework of the AMMA project, a hybrid dataset was developed to provide a best estimate of the different terms of the water cycle. This hybrid dataset is used to evaluate the improvement achieved from the use of extra AMMA observations and of a radiosonde humidity bias-correction scheme in the water cycle of the West African monsoon. Finally, future model developments that offer promising improvements in the water cycle are discussed. Copyright (C) 2010 Royal Meteorological Society
引用
收藏
页码:1457 / 1472
页数:16
相关论文
共 42 条
[1]   Impacts of Assimilating AMMA Soundings on ECMWF Analyses and Forecasts [J].
Agusti-Panareda, Anna ;
Beljaars, Anton ;
Cardinali, Carla ;
Genkova, Iliana ;
Thorncroft, Chris .
WEATHER AND FORECASTING, 2010, 25 (04) :1142-1160
[2]   Radiosonde humidity bias correction over the West African region for the special AMMA reanalysis at ECMWF [J].
Agusti-Panareda, Anna ;
Vasiljevic, Drasko ;
Bejaars, Anton ;
Bock, Olivier ;
Guichard, Francoise ;
Nuret, Mathieu ;
Mendez, Antonio Garcia ;
Andersson, Erik ;
Bechtold, Peter ;
Fink, Andreas ;
Hersbach, Hans ;
Lafore, Jean-Philippe ;
Ngamini, Jean-Blaise ;
Parker, Douglas J. ;
Redelsperger, Jean-Luc ;
Tompkins, Adrian M. .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2009, 135 (640) :595-617
[3]  
AGUSTIPANAREDA A, 2009, 612 ECMWF
[4]  
AGUSTIPANAREDA A, 2010, GEOPHYS RES IN PRESS
[5]  
Andersson E., 2008, ECMWF Newsletter, P8, DOI DOI 10.21957/WNMGUIMIHE
[6]   A Revised Hydrology for the ECMWF Model: Verification from Field Site to Terrestrial Water Storage and Impact in the Integrated Forecast System [J].
Balsamo, Gianpaolo ;
Viterbo, Pedro ;
Beljaars, Anton ;
van den Hurk, Bart ;
Hirschi, Martin ;
Betts, Alan K. ;
Scipal, Klaus .
JOURNAL OF HYDROMETEOROLOGY, 2009, 10 (03) :623-643
[7]   4D-Var assimilation of MERIS total column water-vapour retrievals over land [J].
Bauer, Peter .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2009, 135 (644) :1852-1862
[8]  
Bechtold P., 2008, Newsletter No 114 -Winter 2007/08, P29
[9]   West African Monsoon observed with ground-based GPS receivers during African Monsoon Multidisciplinary Analysis (AMMA) [J].
Bock, O. ;
Bouin, M. N. ;
Doerflinger, E. ;
Collard, P. ;
Masson, F. ;
Meynadier, R. ;
Nahmani, S. ;
Koite, M. ;
Balawan, K. Gaptia Lawan ;
Dide, F. ;
Ouedraogo, D. ;
Pokperlaar, S. ;
Ngamini, J. -B. ;
Lafore, J. P. ;
Janicot, S. ;
Guichard, F. ;
Nuret, M. .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2008, 113 (D21)
[10]   THE AMMA LAND SURFACE MODEL INTERCOMPARISON PROJECT (ALMIP) [J].
Boone, Aaron ;
de Rosnay, Patricia ;
Balsamo, Gianpaolo ;
Beljaars, Anton ;
Chopin, Franck ;
Decharme, Bertrand ;
Delire, Christine ;
Ducharne, Agnes ;
Gascoin, Simon ;
Grippa, Manuela ;
Guichard, Francoise ;
Gusev, Yeugeniy ;
Harris, Phil ;
Jarlan, Lionel ;
Kergoat, Laurent ;
Mougin, Eric ;
Nasonova, Olga ;
Norgaard, Anette ;
Orgeval, Tristan ;
Ottle, Catherine ;
Poccard-Leclercq, Isabelle ;
Polcher, Jan ;
Sandholt, Inge ;
Saux-Picart, Stephane ;
Taylor, Christopher ;
Xue, Yongkang .
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY, 2009, 90 (12) :1865-1880