Preprints
https://doi.org/10.5194/essd-2022-176
https://doi.org/10.5194/essd-2022-176
 
07 Jun 2022
07 Jun 2022
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Hydrodynamic and hydrological processes within a variety of coral reef lagoons: Field observations during 6 cyclonic seasons in New Caledonia

Oriane Bruyère1, Benoit Soulard1, Hugues Lemonnier1, Thierry Laugier1, Morgane Hubert1, Sébastien Petton2, Térence Desclaux1, Simon Van Wynsberge1, Eric Le Tesson1, Jérôme Lefèvre3, Franck Dumas4, Jean-François Kayara5, Emmanuel Bourassin1, Noémie Lalau1, Florence Antypas1, and Romain Le Gendre1 Oriane Bruyère et al.
  • 1Ifremer, UMR 9220 ENTROPIE (IRD, Univ. Réunion, IFREMER, Univ. Nouvelle-Calédonie, CNRS), BP 32078, 98897 Nouméa Cedex, New Caledonia
  • 2Ifremer, UMR 6539 LEMAR, (Ifremer, Univ. Brest, CNRS, IRD), 11 Presqu’île du Vivier, F-29840 Argenton en Landunvez, France
  • 3IRD, UMR 9220 ENTROPIE (IRD, Univ. Réunion, IFREMER, Univ. Nouvelle-Calédonie, CNRS), BPA5, 98948 Noumea, New Caledonia
  • 4SHOM/STM/REC, 13 Rue de Châtellier CS 92803, 29228 Brest CEDEX 2, France
  • 5Direction du Développement Economique et de l'Environnement, Service des milieux et ressources aquatiques, 98859 Koné, New Caledonia

Abstract. From 2014 to 2021, extensive monitoring of hydrodynamics was deployed within a variety of lagoons of New Caledonia during 6 tropical cyclone seasons. Globally, those coastal physical observations encompassed five different lagoons (four of which were never monitored before) and at least eight major atmospheric events ranging from tropical depression to category 4 cyclone. The main objectives were to characterize the processes at stake controlling hydrodynamics and hydrology of these lagoons (e.g ocean-lagoon exchanges, circulation, level dynamics, temperature and salinity variability) and capture their magnitude of change during extreme events. An additional objective was to build an adequate data set for assessment of high-resolution hydrodynamics models. Those field experiments took place within the PRESENCE project (PRESsures on coral Ecosystems of New CalEdonia) which aimed at building an efficient representation of the land-lagoon-ocean continuum of Grande Terre (main land) lagoons. Autonomous oceanographic instruments were moored at strategic locations to collect time-series of temperature, salinity, pressure, eulerian currents which characterize hydrodynamics at best. During field trips, whenever possible, lagrangian drifters releases and cross-shore hydrological profiles radials were additionally carried out. Surveys begun chronologically with SPHYNX campaign which lasted 15 months (December 2014 to February 2016) in the Hienghène-Touho lagoon followed with 5 months records in NOUMEA lagoon (December 2016 to April 2017). ELADE campaign in Poe lagoon encompassed 2 periods of measure (February to April 2018 and June to August 2018). In Koumac lagoon, CADHYAK survey was carried out between December 2019 until the end of May 2020 and finally, data have been recorded continuously for 9 months in Moindou lagoon (NEMO) (September 2020 to April 2021). In addition to characterize these lagoons, this data set stresses out some important features and processes, such as the presence of internal waves on reef slopes, wave-driven fluxes over reef barrier and exchanges through passes. It also contains the signatures of strong events materialized by surges, thermal drops inside lagoons or massive flash flood plumes dispersion. Raw data sets were processed, quality-controlled and validated, and processed files are publicly available in dedicated repositories on Seanoe in NetCDF format. Links (DOI) of individual data sets are provided herein.

Oriane Bruyère et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-176', Damien Sous, 12 Sep 2022
    • AC1: 'Reply on RC1', oriane bruyere, 25 Oct 2022
  • RC2: 'Comment on essd-2022-176', Anonymous Referee #2, 14 Sep 2022
    • AC2: 'Reply on RC2', oriane bruyere, 25 Oct 2022
  • RC3: 'Comment on essd-2022-176', Anonymous Referee #3, 25 Sep 2022
    • AC3: 'Reply on RC3', oriane bruyere, 25 Oct 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-176', Damien Sous, 12 Sep 2022
    • AC1: 'Reply on RC1', oriane bruyere, 25 Oct 2022
  • RC2: 'Comment on essd-2022-176', Anonymous Referee #2, 14 Sep 2022
    • AC2: 'Reply on RC2', oriane bruyere, 25 Oct 2022
  • RC3: 'Comment on essd-2022-176', Anonymous Referee #3, 25 Sep 2022
    • AC3: 'Reply on RC3', oriane bruyere, 25 Oct 2022

Oriane Bruyère et al.

Data sets

NEMO surveys : Field observations of hydrodynamics functionning of Moindou lagoon (New Caledonia - South Province) Bruyere Oriane, Soulard Benoit, Bourassin Emmanuel, Le Gendre Romain https://doi.org/10.17882/81063

Field observations of Hydrodynamics in a shallow coral reef lagoon : Poe lagoon - New Caledonia Le Gendre Romain, Soulard Benoit, Lalau Noemie, Bruyere Oriane, Van Wynsberge Simon https://doi.org/10.17882/76334

CADHYAK surveys : Field observations of hydrodynamics functioning of Koumac Lagoon (New Caledonia - North Province) Bruyere Oriane, Le Gendre Romain, Bourassin Emmanuel, Petton Sebastien, Soulard Benoit https://doi.org/10.17882/79616

Fate of terrestrial runoffs on the coastal zone of Noumea (New-Caledonia) : Moorings and CTD profiles Desclaux Terence, Soulard Benoit, Bruyere Oriane, Petton Sebastien, Royer Florence, Hubert Clarisse, Le Tesson Eric, Lemonnier Hugues, Schohn Thomas, Le Gendre Romain https://doi.org/10.17882/53974

SPHYNX Surveys : Hydrodynamic functioning of Hienghene Lagoon (New-Caledonia - North Province) Le Gendre Romain, Laugier Thierry, Hubert Morgane, Lemonnier Hugues, Bruyere Oriane, Desclaux Terence, Royer Florence, Le Tesson Eric, Dumas Franck, Kayara Jean-François, Soulard Benoit https://doi.org/10.17882/54005

Oriane Bruyère et al.

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Short summary
From 2014 to 2021, extensive monitoring of hydrodynamics was deployed within five contrasted lagoons of New Caledonia during austral summers. These coastal physical observations encompassed unmonitored lagoons and captured eight major atmospheric events ranging from tropical depression to category 4 cyclone. The main objectives were to characterize the processes controlling hydrodynamics of these lagoons and record the signature of extreme events on land-lagoon-ocean continuum functioning.