diff --git a/src/data/papers-citing-parcels.ts b/src/data/papers-citing-parcels.ts index 7917964..0bda1d2 100644 --- a/src/data/papers-citing-parcels.ts +++ b/src/data/papers-citing-parcels.ts @@ -2898,4 +2898,24 @@ export const papersCitingParcels: Paper[] = [ abstract: 'Antarctic Intermediate Water (AAIW) contributes to the northward flow required to compensate the export of North Atlantic Deep Water from the North Atlantic Ocean to other basins and therefore plays a crucial role in the Atlantic Meridional Overturning Circulation. Based on observations and outputs from an ocean reanalysis we present evidence of a narrow band of relatively fresh (≤34.20) and oxygen rich (>260 μmol.kg−1) newly formed AAIW which extends northwards, past the Brazil-Malvinas Confluence (BMC) up to 34.5°S. We investigated the probability of occurrence of this phenomenon, the possible driving mechanisms, and its seasonal and inter-annual variability. Our results indicate that this flow is weak and intermittent, confined to the upper continental slope near the 1000 m isobath. The mean travel time between 38 and 39°S, south of the BMC, and 34.5°S is 205–217 days; occasionally, during the development of intense pulses, the travel time reduces to less than 60 days. The mean particle velocity during pulses is 12.60 cm.s−1. A weakening or reversal of the southward flowing Brazil Current (BC) is observed prior to strong pulses; this circulation pattern could facilitate the northward pathway of relatively fresh AAIW. The BC intensifies during February-March and weakens during August-September; thus, the northward AAIW pulses are also observed more frequently in September. The northward extension of the relatively fresh variety of AAIW is also favoured by cyclonic circulations trapped against the slope onshore from the core of the BC.', }, + { + title: + 'Coastal circulation and dispersion of passive tracers in the Red River plume region: unveiling seasonal- and intra-seasonal variability', + published_info: 'Ocean Science, 22, 1105-1127', + authors: + 'Tran, TH, A Sentchev, D Dumas, C-A Guerin, S Ouillon, KC Nguyen (2026)', + doi: 'https://doi.org/10.5194/os-22-1105-2026', + abstract: + 'The Red River (RR) plume region of the Gulf of Tonkin (GoT) plays an important role in driving coastal dynamic variability and regulating sediment and nutrient transport and budgets, and is therefore vital for coastal ecosystems and maritime activities. High-frequency radar (HFR) surface current measurements were used to characterize surface circulation and assess passive-tracer dispersion from August to December 2024, improving understanding of particle transport, dispersal, and fate in this region. The coastal circulation in the region, found to be strongly influenced by winds, tidal forcing, riverine input, and coastal bathymetry, exhibited a large spatio-temporal variability during the analysis period with the occurrence of small-scale structures, i.e., submesoscale eddies. The dispersion under varying forcing conditions and an extreme event – the typhoon Yagi – was analyzed by particle tracking and Lagrangian diagnostics. The results revealed that the dispersion within the RR plume region predominantly approached a Richardson super-diffusive regime after 24 h of tracking. Under the influence of typhoon Yagi, the dispersion was approximated by a ballistic regime after 12 h of tracking, with the spreading rate 10 times faster than that during normal conditions. In addition, the presence of Lagrangian Coherent Structures (LCSs), i.e., eddies next to the river outflow jets, coastal plume fronts, and zones of surface current convergence and divergence in the vicinity of river outlets, significantly influenced the dispersion behavior of tracers in the RR plume region. Overall, this study provides new insights into how coastal circulation and material dispersal in the RR plume respond across a wide range of weather conditions, including extreme events.', + }, + { + title: + 'Asymmetric Effects of Topographic Slopes and Bottom Friction on Lagrangian and Eulerian Eddy Diffusivities in Two-Layer QG Flow', + published_info: 'Journal of Geophysical Research, 131, e2025JC023770', + authors: + 'Sterl, MF, A Palóczy, JH LaCasce, MLJ Baatsen, S Groeskamp (2026)', + doi: 'https://doi.org/10.1029/2025JC023770', + abstract: + 'We investigate how a topographic slope impacts eddy diffusivities in a two-layer quasi-geostrophic model. There are asymmetric effects of retrograde slopes, where the layer interface and the topography tilt in the same direction, and prograde slopes, where the interface and topography tilt in opposite directions. Moreover, there is asymmetry between the upper and lower layer. Steep retrograde slopes suppress the eddy diffusivity in both layers compared to flat or weak slopes. With a strong prograde slope, coherent, long-lived vortices form in the upper layer; as these are surface-trapped, they are not influenced by topography or bottom friction, and the diffusivity in the upper layer is thus relatively unaffected by the slope. In the lower layer, however, the diffusivities decrease with slope magnitude for both prograde and retrograde slopes. We also compare the Lagrangian diffusivity, derived from particle tracking experiments, and the Eulerian diffusivity, based on the flux-gradient relation for potential vorticity (PV). The two values agree in the upper layer, but not in the lower layer. We present a new expression relating Eulerian and Lagrangian diffusivities, and this correctly captures the differences seen in the lower layer. The difference occurs because bottom friction alters the PV along the particle tracks. The results underline the importance of considering both topographic slopes and bottom friction in parametrizations of mesoscale eddy stirring.', + }, ]