@article{fdi:010078188,
  title = {{A}dvances in reconstructing the {AMOC} using sea surface observations of salinity},
  author = {{E}stella-{P}erez, {V}. and {M}ignot, {J}uliette and {G}uilyardi, {E}. and {S}wingedouw, {D}. and {R}everdin, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {A}tlantic meridional overturning circulation ({AMOC}) is one of the main drivers of climate variability at decadal and longer time scales. {A}s there are no direct multi-decadal observations of this key circulation, the reconstruction of past {AMOC} variations is essential. {T}his work presents a step forward in reconstructing the {AMOC} using climate models and time-varying surface nudging of salinity and temperature data, for which independent multi-decadal observed series are available. {A} number of nudging protocols are explored in a perfect model framework to best reproduce the {AMOC} variability accommodating to the characteristics of {SST} and {SSS} available products. {A}s reference {SST} products with sufficient space and time coverage are available, we here choose to focus on the limitations associated to {SSS} products with the goal of providing protocols using independent salinity products. {W}e consider a global gridded dataset and, additionally, a coarser {SSS} dataset restricted to the {A}tlantic and with a quite low spatial resolution (order of 10 degrees vs. 2 for the model grid). {W}e show how, using the latter, we can improve the efficiency of the nudging on the {AMOC} reconstruction by adding a high-resolution annual cycle to the coarse resolution {SSS} product as well as a spatial downscaling to account for {SSS} gradient. {T}he final protocol retained for the coarse {SSS} data is able to reconstruct a 100-year long {AMOC} period (average of 10.18 {S}v and a standard deviation of 1.39 {S}v), with a correlation of 0.76 to the target and a {RMSE} of 0.99 {S}v. {T}hese values can be respectively compared to 0.85 and 0.75 {S}v when using the global salinity surface observations. {T}his work provides a first step towards understanding the limitations and prospects of historical {AMOC} reconstructions using different sea surface salinity datasets for the surface nudging.},
  keywords = {{AMOC} ; {R}econstruction ; {S}urface nudging ; {H}istorical period ; {ATLANTIQUE}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {55},
  numero = {3-4},
  pages = {975--992},
  ISSN = {0930-7575},
  year = {2020},
  DOI = {10.1007/s00382-020-05304-4},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078188},
}