Intraseasonal variability of the West African monsoon

被引：81

作者：

Janicot, S. ^{[1
]}

Caniaux, G. ^{[2
]}

Chauvin, F. ^{[2
]}

de Coetlogon, G. ^{[3
]}

Fontaine, B. ^{[4
]}

Hall, N. ^{[5
]}

Kiladis, G. ^{[5
]}

Lafore, J. -P. ^{[2
]}

Lavaysse, C. ^{[7
]}

Lavender, S. L. ^{[8
]}

Leroux, S. ^{[6
]}

Marteau, R. ^{[4
]}

Mounier, F. ^{[9
]}

Philippon, N. ^{[4
]}

Roehrig, R. ^{[2
]}

Sultan, B. ^{[1
]}

Taylor, C. M. ^{[10
]}

机构：

[1] Univ Paris 06, LOCEAN, IPSL, Inst Rech Dev, F-75252 Paris 05, France

[2] Meteo France, Ctr Natl Rech Meteorol, Toulouse, France

[3] Univ Paris 06, Lab Atmospheres Milieux Observat Spatiales, Inst Pierre Simon Laplace, F-75252 Paris 05, France

[4] Univ Bourgogne, Ctr Rech Climatol, Dijon, France

[5] Observ Midi Pyrenees, Lab Etud Geophys & Oceanog Spatiales, F-31400 Toulouse, France

[6] Natl Ocean & Atmospher Adm, Div Phys Sci, Earth Syst Res Lab, Boulder, CO USA

[7] McGill Univ, Montreal, PQ, Canada

[8] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England

[9] EQECAT, Paris, France

[10] Ctr Ecol & Hydrol, Wallingford, Oxon, England

来源：

ATMOSPHERIC SCIENCE LETTERS | 2011年 / 12卷 / 01期

关键词：

West African monsoon; intraseasonal variability; monsoon onset; predictability; crop yield; DYNAMICS; EVOLUTION; RAINFALL;

D O I：

10.1002/asl.280

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The intraseasonal time scale is critical in West Africa where resources are highly rainfall dependent. Three main modes of variability have been identified, two with a mean periodicity of 15 days and one with a mean periodicity around 40 days. These modes have a regional scale and can strongly influence precipitation and convective activity. They are mainly controlled by atmospheric dynamics and land-surface interactions. They can also modulate the very specific phase of the African summer monsoon onset. A better knowledge of the mechanisms controlling this scale is necessary to improve its predictability. Copyright. (C) 2010 Royal Meteorological Society

引用

页码：58 / 66

页数：9

共 36 条

[1]

BARON C, 2005, SOCIETY, V360, P2095, DOI DOI 10.1098/RSB.2005.1741

[2] Equatorial upper-ocean dynamics and their interaction with the West African monsoon [J].

Brandt, Peter ;

Caniaux, Guy ;

Bourles, Bernard ;

Lazar, Alban ;

Dengler, Marcus ;

Funk, Andreas ;

Hormann, Verena ;

Giordani, Herve ;

Marin, Frederic .

ATMOSPHERIC SCIENCE LETTERS, 2011, 12 (01) :24-30

[3]

CHAUVIN F, 2010, J CLIMATE IN PRESS

[4] The impact of moist processes on the African Easterly Jet-African Easterly Wave system [J].

Cornforth, R. J. ;

Hoskins, B. J. ;

Thorncroft, C. D. .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2009, 135 (641) :894-913

[5] Intraseasonal variability of the ocean - atmosphere coupling in the Gulf of Guinea during boreal spring and summer [J].

de Coetlogon, Gaelle ;

Janicot, Serge ;

Lazar, Alban .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2010, 136 :426-441

[6] Definition and predictability of an OLR-based West African monsoon onset [J].

Fontaine, Bernard ;

Louvet, Samuel ;

Roucou, Pascal .

INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2008, 28 (13) :1787-1798

[7] Sudan-Sahel rainfall onset: Definition of an objective index, types of years, and experimental hindcasts [J].

Fontaine, Bernard ;

Louvet, Samuel .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2006, 111 (D20)

[8] Early warning systems for food security in West Africa: evolution, achievements and challenges [J].

Genesio, L. ;

Bacci, M. ;

Baron, C. ;

Diarra, B. ;

Di Vecchia, A. ;

Alhassane, A. ;

Hassane, I. ;

Ndiaye, M. ;

Philippon, N. ;

Tarchiani, V. ;

Traore, S. .

ATMOSPHERIC SCIENCE LETTERS, 2011, 12 (01) :142-148

[9] Dynamics of the West African monsoon jump [J].

Hagos, Samson M. ;

Cook, Kerry H. .

JOURNAL OF CLIMATE, 2007, 20 (21) :5264-5284

[10]

Huffman GJ, 2001, J HYDROMETEOROL, V2, P36, DOI 10.1175/1525-7541(2001)002<0036:GPAODD>2.0.CO

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