@article{fdi:010046132,
  title = {{D}evelopment, implementation and evaluation of a data-assimilative ocean forecasting system off the central {C}alifornia coast},
  author = {{C}hao, {Y}. and {L}i, {Z}. {J}. and {F}arrara, {J}. and {M}c{W}illiams, {J}. {C}. and {B}ellingham, {J}. and {C}apet, {X}. and {C}havez, {F}. and {C}hoi, {J}. {K}. and {D}avis, {R}. and {D}oyle, {J}. and {F}ratantoni, {D}. {M}. and {L}i, {P}. and {M}archesiello, {P}atrick and {M}oline, {M}. {A}. and {P}aduan, {J}. and {R}amp, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he development and implementation of a real-time ocean forecast system based on the {R}egional {O}cean {M}odeling {S}ystem ({ROMS}) off the coast of central {C}alifornia are described. {T}he {ROMS} configuration consists of three nested modeling domains with increasing spatial resolutions: the {US} {W}est coastal ocean at 15-km resolution, the central {C}alifornia coastal ocean at 5 km, and the {M}onterey {B}ay region at 1.5 km. {A}ll three nested models have 32 vertical sigma (or terrain-following) layers and were integrated in conj. unction with a three-dimensional variational data assimilation algorithm (3{DVAR}) to produce snapshots of the ocean state every 6 h (the reanalysis) and 48-h forecasts once a day. {T}his {ROMS} forecast system was operated in real time during the field experiment known as the {A}utonomous {O}cean {S}ampling {N}etwork ({AOSN}-{II}) in {A}ugust 2003. {A}fter the field experiment, a number of improvements were made to the {ROMS} forecast system: more data were added in the reanalysis with more careful quality control procedures, improvements were made in the data assimilation scheme, as well as model surface and side boundary conditions. {T}he results from the {ROMS} reanalysis are presented here. {T}he {ROMS} reanalysis is first compared with the assimilated data as a consistency check. {A}n evaluation of the {ROMS} reanalysis against the independent measurements that are not assimilated into the model is then presented. {T}his evaluation shows the mean differences in temperature and salinity between reanalysis and observations to be less than 1 degrees {C} and 0.2 psu (practical salinity unit), respectively, with root-mean-square ({RMS}) differences of less than 1.5 degrees {C} and 0.25 psu. {Q}ualitative agreement is found between independent current measurements and the {ROMS} reanalysis. {T}he agreement is particularly good for the vertically integrated current along the offshore glider tracks: the {ROMS} reanalysis can realistically reproduce the poleward {C}alifornia {U}ndercurrent. {R}easonably good agreement is found in the spatial patterns of the surface current as measured by high-frequency ({HF}) radars. {P}reliminary results concerning the {ROMS} forecast skill and predictability are also presented. {F}uture plans to improve the {ROMS} forecast system with a particular focus on assimilation of {HF} radar current measurements are discussed.},
  keywords = {{D}ata assimilation ; {O}cean modeling ; {O}cean forecast ; {C}oastal ocean ; {A}daptive sampling ; {R}eanalysis},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} - {T}opical {S}tudies in {O}ceanography},
  volume = {56},
  numero = {3-5},
  pages = {100--126},
  ISSN = {0967-0645},
  year = {2009},
  DOI = {10.1016/j.dsr2.2008.08.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010046132},
}