@article{fdi:010077794,
  title = {{R}emote influences on the {I}ndian monsoon low-level jet intraseasonal variations},
  author = {{S}wathi, {M}. {S}. and {I}zumo, {T}akeshi and {L}engaigne, {M}atthieu and {V}ialard, {J}{\'e}r{\^o}me and {K}umar, {M}. {R}. {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} strong low-level jet ({LLJ}), also known as the {F}indlater jet, develops over the {A}rabian {S}ea during the {I}ndian summer monsoon. {T}his jet is an essential source of moisture for monsoonal rainfall over the densely-populated {I}ndian subcontinent and is a key contributor to the {I}ndian {O}cean oceanic productivity by sustaining the western {A}rabian {S}ea upwelling systems. {T}he {LLJ} intensity fluctuates intraseasonally within the 20- to 90-day band, in relation with the northward-propagating active and break phases of the {I}ndian summer monsoon. {O}ur observational analyses reveal that these large-scale regional convective perturbations only explain about half of the intraseasonal {LLJ} variance, the other half being unrelated to large-scale convective perturbations over the {I}ndian {O}cean. {W}e show that convective fluctuations in two regions outside the {I}ndian {O}cean can remotely force a {LLJ} intensification, four days later. {E}nhanced atmospheric deep convection over the northwestern tropical {P}acific yields westerly wind anomalies that propagate westward to the {A}rabian {S}ea as baroclinic atmospheric {R}ossby {W}aves. {S}uppressed convection over the eastern {P}acific/{N}orth {A}merican monsoon region yields westerly wind anomalies that propagate eastward to the {I}ndian {O}cean as dry baroclinic equatorial {K}elvin waves. {T}hose largely independent remote influences jointly explain 40% of the intraseasonal {LLJ} variance that is not related to convective perturbations over the {I}ndian {O}cean (i.e. 20% of the total), with the northwestern {P}acific contributing twice as much as the eastern {P}acific. {T}aking into account these two remote influences should thus enhance the ability to predict the {LLJ}.},
  keywords = {{OCEAN} {INDIEN} ; {MER} {D}'{ARABIE}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {54},
  numero = {3-4},
  pages = {2221--2236},
  ISSN = {0930-7575},
  year = {2020},
  DOI = {10.1007/s00382-019-05108-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077794},
}