@article{fdi:010061161,
  title = {{R}evisiting wintertime cold air intrusions at the east of the {A}ndes : propagating features from subtropical {A}rgentina to {P}eruvian {A}mazon and relationship with large-scale circulation patterns},
  author = {{E}spinoza, {J}. {C}. and {R}onchail, {J}. and {L}engaigne, {M}atthieu and {Q}uispe, {N}. and {S}ilva, {Y}. and {B}ettolli, {M}. {L}. and {A}valos, {G}. and {L}lacza, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study investigates the spatial and temporal characteristics of cold surges that propagates northward along the eastern flank of the {A}ndes from subtropical to tropical {S}outh {A}merica analysing wintertime in situ daily minimum temperature observations from {A}rgentina, {B}olivia and {P}eru and {ERA}-40 reanalysis over the 1975-2001 period. {C}old surges usually last 2 or 3 days but are generally less persistent in the southern {L}a {P}lata basin compared to tropical regions. {O}n average, three to four cold surges are reported each year. {O}ur analysis reveals that 52 % of cold episodes registered in the south of {L}a {P}lata basin propagate northward to the northern {P}eruvian {A}mazon at a speed of around 20 m s(-1). {I}n comparison to cold surges that do not reach the tropical region, we demonstrate that these cold surges are characterized, before they reach the tropical region, by a higher occurrence of a specific circulation pattern associated to southern low-level winds progression toward low latitudes combined with subsidence and dry condition in the middle and low troposphere that reinforce the cold episode through a radiative effect. {F}inally, the relationship between cold surges and atmosphere dynamics is illustrated for the two most severe cold intrusions that reached the {P}eruvian and {B}olivian {A}mazon in the last 20 years.},
  keywords = {{P}eruvian {A}mazon ; {B}olivian {A}mazon ; {A}rgentina ; {C}old surges ; {L}ow-level winds ; {C}irculation patterns ; {S}elf-organizing maps ; {ANDES} ; {AMAZONIE} ; {ARGENTINE} ; {PEROU}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {41},
  numero = {7-8},
  pages = {1983--2002},
  ISSN = {0930-7575},
  year = {2013},
  DOI = {10.1007/s00382-012-1639-y},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061161},
}