FN Archimer Export Format
PT J
TI Benguela Niños and Benguela Niñas in forced ocean simulation from 1958 to 2015
BT 
AF Imbol Koungue, Rodrigue Anicet
   Rouault, Mathieu
   Illig, Serena
   Brandt, Peter
   Jouanno, Julien
AS 1:1,2,3;2:2,3;3:2,4;4:1,5;5:4;
FF 1:;2:;3:;4:;5:;
C1 GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel ,Germany
   Department of Oceanography, MARE InstituteUniversity of Cape Town Cape Town South Africa
   Nansen‐Tutu Centre for Marine Environmental Research, Department of Oceanography, University of Cape Town Rondebosch ,South Africa
   Laboratoire d’Etudes en Géophysique et Océanographie Spatiales (LEGOS), Université de Toulouse, CNES, CNRS, IRD, UPS Toulouse ,France
   Christian‐Albrechts‐Universität zu Kiel Kiel, Germany
C2 GEOMAR HELMHOLTZ CTR OCEAN RES KIEL, GERMANY
   UNIV CAPE TOWN, SOUTH AFRICA
   UNIV CAPE TOWN, SOUTH AFRICA
   UNIV TOULOUSE, FRANCE
   UNIV KIEL, GERMANY
IF 3.559
TC 27
UR https://archimer.ifremer.fr/doc/00509/62110/66302.pdf
   https://archimer.ifremer.fr/doc/00509/62110/66303.pdf
LA English
DT Article
CR EQUALANT I
BO Ombango
DE ;Benguela Ninos;Benguela Ninas;equatorial Kelvin waves;upwelling;South Atlantic anticyclone
AB A systematic study of Benguela Niño and Benguela Niña events during 1958 to 2015 including those that developed before the satellite era (1982) is carried out using an ocean general circulation model in combination with a linear equatorial model. Altogether, 21 strong warm and cold anomalous coastal events are identified among which 6 undocumented extreme coastal events are reported. Results suggest that most of these extreme coastal events including the newly identified ones are linked to remote equatorial forcing via mode 2 equatorial Kelvin waves. The latter propagates after approaching the African coast poleward as coastally trapped waves leading surface temperature anomalies along the Angola‐Benguela current system by 1 month. 1‐2 months before the peak of Benguela Niños or Niñas usually occurring in March‐April, a large‐scale wind stress forcing is observed with both local (variations of alongshore coastal wind stress) and remote forcing developing simultaneously. Results further suggest that surface temperature anomalies off Southern Angola and in the Angola‐Benguela Front are associated with equatorial dynamics and meridional wind stress fluctuations off the southwestern African coast north of 15°S. Similar mechanisms are observed for Northern Namibia in combination with forcing by local meridional wind stress variations. Key points Over 1958‐2015, we document the development of Benguela Niño and Niña events occurring along the southwestern African coast They are associated with coastally trapped waves dominantly forced by eastward propagating equatorial Kelvin waves of second baroclinic mode They are linked to large‐scale wind stress forcing 1‐2 month before they peak usually in March‐April 
PY 2019
PD AUG
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU American Geophysical Union (AGU)
VL 124
IS 8
UT 000490464200033
BP 5923
EP 5951
DI 10.1029/2019JC015013
ID 62110
ER

EF