A Lagrangian study of the contribution of the Canary coastal upwelling to the nitrogen budget of the open North Atlantic

• Main Authors: Hailegeorgis, Derara, Lachkar, Zouhair, Rieper, Christoph, Gruber, Nicolas
• Format: Dataset
• Language: English
• Published: Zenodo 2021
• Subjects: Canary coastal upwelling; North Atlantic Ocean; Lagrangian trajectories; ROMS; Nutrient transport; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.4384338; https://zenodo.org/record/4384338

The attached datasets constitute the particle trajectory data produced in the experiment for Hailegeorgis et al.. The "traj_upwell_1d_70m_1d-variables.nc" contains variables that describe different aspects of each upwelled particle (mostly regarding a particle's release or its initial or final conditions). The rest of the files with the format "traj_upwell_1d_70m_XXX-traj.nc" describe an attribute XXX (location or nutrient concentration) along the trajectory of upwelled particles tracked as part of the experiment. With ARIANE, particles are released and tracked in a ROMS simulation of the Canary coastal upwelling region. Out of the ~10M particles, the trajectories of the ~353K (~3.6%) that upwell are included. The variable "index_in_full_exp" in file "traj_upwell_1d_70m_1d-variables.nc" shows the index of each of these upwelling particles in the larger pool of released particles. For each upwelled particle, out of the 720-day trajectories starting from its release into the coast, the values from its upwelling step to its exit from the experiment are included, with the values outside this range being filled with a generic value (1.e20). An upwelled particle exits the experiment when it leaves the regional ROMS simulation altogether or when it leaves the coast and returns to the coast to re-upwell (more details in the paper). Be mindful of the different values of time. In "traj_upwell_1d_70m_1d-variables.nc", the variable "release_time" tells each particle's release time, in days since onset of the ROMS simulation, while variable "coast_exit_time" tells each particle's day of exiting coast, in days since its release. In each particle's trajectory (in traj_lon, traj_lat, etc), the first and last steps with valid values are the same as the days of its upwelling and its exit, respectively, since its release. The files contain the name and description of each variable. Along with the details in the publication, the descriptions here should be enough to fully interpret the information and replicate our analysis. : Support for this research has come from the Center for Prototype Climate Modeling (CPCM), the New York University Abu Dhabi (NYUAD) Research Institute. Computations were performed at the High Performance cluster (HPC) of NYUAD, Dalma. Nicolas Gruber acknowledges support by the Swiss National Science Foundation through the CALNEX project (Grant 149384) and by the Swiss Federal Institute of Technology Zurich (ETH Zurich). The authors are grateful to B. Blanke and N. Grima for making their ARIANE code available and to the NYUAD HPC team for technical support. The model code can be accessed online (http://www.romsagrif.org). : {"references": ["Hailegeorgis, D., Lachkar, Z., Rieper, C., and Gruber, N.: A Lagrangian study of the contribution of the Canary coastal upwelling to the nitrogen budget of the open North Atlantic, Biogeosciences, 18, 303\u2013325, https://doi.org/10.5194/bg-18-303-2021, 2021."]}