@article{fdi:010037681,
  title = {{E}ddy-resolving simulation of plankton ecosystem dynamics in the {C}alifornia {C}urrent {S}ystem},
  author = {{G}ruber, {N}. and {F}renzel, {H}. and {D}oney, {S}.{C}. and {M}archesiello, {P}atrick and {M}c{W}illiams, {J}.{C}. and {M}oisan, {J}.{R}. and {O}ram, {J}.{J}. and {P}lattner, {G}.{K}. and {S}tolzenbach, {K}.{D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e study the dynamics of the planktonic ecosystem in the coastal upwelling zone within the {C}alifornia {C}urrent {S}ystem using a three-dimensional (3-{D}), eddy-resolving circulation model coupled to an ecosystern/biogeochemistry model. {T}he physical model is based on the {R}egional {O}ceanic {M}odeling {S}ystem ({ROMS}), configured at a resolution of 15 km for a domain covering the entire {US} {W}est {C}oast, with an embedded child grid covering the central {C}alifornia upwelling region at a resolution of 5 km. {T}he model is forced with monthly mean boundary conditions at the open lateral boundaries as well as at the surface. {T}he ecological/biogeochemical model is nitrogen based, includes single classes for phytoplankton and zooplankton, and considers two detrital pools with different sinking speeds. {T}he model also explicitly simulates a variable chlorophyll-to-carbon ratio. {C}omparisons of model results with either remote sensing observations ({AVHRR}, {S}ea{W}i{FS}) or in-situ measurements from the {C}al{COFI} program indicate that our model is capable of replicating many of the large-scale, time-averaged features of the coastal upwelling system. {A}n exception is the underestimation of the chlorophyll levels in the northern part of the domain, perhaps because of the lack of short-term variations in the atmospheric forcing. {A}nother shortcoming is that the modeled thermocline is too diffuse, and that the upward slope of the isolines toward the coast is too small. {D}etailed time-series comparisons with observations from {M}onterey {B}ay reveal similar agreements and discrepancies. {W}e attribute the good agreement between the modeled and observed ecological properties in large part to the accuracy of the physical fields. {I}n turn, many of the discrepancies can be traced back to our use of monthly mean forcing. {A}nalysis of the ecosystem structure and dynamics reveal that the magnitude and pattern of phytoplankton biomass in the nearshore region are determined largely by the balance of growth and zooplankton grazing, while in the offshore region, growth is balanced by mortality. {T}he latter appears to be inconsistent with in situ observations and is a result of our consideration of only one zooplankton size class (mesozooplankton), neglecting the importance of microzooplankton grazing in the offshore region. {A} comparison of the allocation of nitrogen into the different pools of the ecosystem in the 3-{D} results with those obtained from a box model configuration of the same ecosystem model reveals that only a few components of the ecosystem reach a local steady-state, i.e. where biological sources and sinks balance each other. {T}he balances for the majority of the components are achieved by local biological source and sink terms balancing the net physical divergence, confirming the importance of the 3-{D} nature of circulation and mixing in a coastal upwelling system. (c) 2006 {E}lsevier {L}td. {A}ll rights reserved.},
  keywords = {phytoplankton dynamics ; nutrient cycling ; coastal biogeochemistry ; {C}alifornia current ; upwelling},
  booktitle = {},
  journal = {{D}eep {S}ea {R}esearch {P}art {I} : {O}ceanographic {R}esearch {P}apers},
  volume = {53},
  numero = {9},
  pages = {1483--1516},
  ISSN = {0967-0637},
  year = {2006},
  DOI = {10.1016/j.dsr.2006.06.005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037681},
}