@article{fdi:010079718,
  title = {{L}ongshore drift produced by climate-modulated monsoons and typhoons in the {S}outh {C}hina {S}ea},
  author = {{M}archesiello, {P}atrick and {K}estenare, {E}lodie and {A}lmar, {R}afa{\¨e}l and {B}oucharel, {J}. and {N}guyen, {N}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}onsoons and typhoons impact the tropical coastal zones through their signature on winds and waves, leading to increased vulnerability - through erosion, marine submersion and flooding - of an ever growing coastal population. {T}his study addresses wave-driven coastal impacts in the {S}outh {C}hina {S}ea ({SCS}), particularly along the {V}ietnam coast. {U}sing 38 years of offshore wave fields from {ERA}-{I}nterim reanalysis, we assess the seasonal and interannual variability of wave patterns, storminess, and wave-induced alongshore sediment transport (longshore drift). {R}esults suggest a large seasonal coastal impact due to high-energy, northeasterly waves generated by winter monsoon winds. {T}he net annual sediment transport is southward with significant interannual and decadal variations (20% standard deviation with particular years at 40% of the mean), presenting strong correlations with the {E}l {N}ino {S}outhern {O}scillation ({ENSO}) and {P}acific {D}ecadal {O}scillation ({PDO}) regime changes. {T}he regime shift of 1998, from a warm to a cold {PDO} phase characterized by more {L}a {N}ina events, is associated with an increase in winter wave energy and thus higher sediment transport (about 10%). {T}he typhoon activity in the {SCS} is partly associated with that of the {P}acific {N}orthwest basin, but as a large semi-enclosed sea, presents local differences. {I}t is positively correlated with {L}a {N}ina in summer and with {E}l {N}ino {M}odoki in winter. {T}he summer correlation to {ENSO} phases is opposite to that of the whole {N}orthwest {P}acific due to competing local and remote mechanisms driving cyclone formation and trajectory. {F}or the same reason, the effects of {ENSO} and {PDO} phases are opposite in the {SCS}: during the last cold {PDO} phase, typhoon frequency was reduced by 20%, with significant net impact on estimated sediment transport. {T}he typhoon contribution to sediment transport is a 15% reinforcement of southward transport due essentially to winter activity. {I}f winter monsoon and typhoons appear to work together on average, their low-frequency variability are out-of-phase. {T}his is particularly clear at decadal scale, as cold {PDO} phases seem favorable to strong winter monsoon waves but detrimental to {SCS} typhoon numbers. {T}hese results confirm that regional climate variability (together with human factors affecting river sediment supply, coastal management of beach-dune systems, land subsidence, mangrove deforestation) is an essential part of coastal vulnerability that needs to be better assessed.},
  keywords = {{L}ongshore drift ; {W}ave climate ; {M}onsoon ; {T}yphoon ; {ENSO} ; {PDO} ; {VIET} {NAM} ; {PACIFIQUE} ; {MER} {DE} {CHINE}},
  booktitle = {},
  journal = {{J}ournal of {M}arine {S}ystems},
  volume = {211},
  numero = {},
  pages = {103399 [12 ]},
  ISSN = {0924-7963},
  year = {2020},
  DOI = {10.1016/j.jmarsys.2020.103399},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079718},
}