Nicolas Rascle
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View article: Diagnosis of Ocean Near‐Surface Horizontal Momentum Balance From Pre‐SWOT Altimetric Data, Drifter Trajectories, and Wind Reanalysis
Diagnosis of Ocean Near‐Surface Horizontal Momentum Balance From Pre‐SWOT Altimetric Data, Drifter Trajectories, and Wind Reanalysis Open
Along‐track and gridded altimetric observations of sea level are colocated and combined with data from drifter observations and wind reanalysis to reconstruct global instantaneous near‐surface horizontal momentum balance. This reconstructi…
View article: Directional wave spectrum retrieved from in-situ and remote sensors
Directional wave spectrum retrieved from in-situ and remote sensors Open
Measurements of ocean surface waves are obtained and studied from various perspectives. A coastal high frequency radar and an acoustic Doppler current profiler have been deployed and operated to detect and determine the source of differenc…
View article: Nearshore satellite-derived bathymetry from a single-pass satellite video: Improvements from adaptive correlation window size and modulation transfer function
Nearshore satellite-derived bathymetry from a single-pass satellite video: Improvements from adaptive correlation window size and modulation transfer function Open
Accurate nearshore bathymetry estimation remains a critical challenge, impacting coastal forecasting evolution assessments through the inaccuracies in both in-situ and remote sensing surveys. This article introduces the Satellite Derived B…
View article: Ocean-Atmosphere Interaction Pilot Project in the Gulf of Mexico under CIGoM Buoy Network.
Ocean-Atmosphere Interaction Pilot Project in the Gulf of Mexico under CIGoM Buoy Network. Open
CIGoM Buoy Network in the Gulf of Mexico was implemented and operated between 2016 and 2019. While two type of buoys were designed and built, in this work we focus on spar buoy (BOMM, as Spanish acronym for Oceanography and Marine Meteorol…
View article: On the Measurement of Ocean Near-Surface Current from a Moving Buoy
On the Measurement of Ocean Near-Surface Current from a Moving Buoy Open
This paper studies the error that occurs when measuring surface currents with a current meter mounted on a buoy or a mooring line whose horizontal and vertical motions respond to the presence of waves. The error is defined with respect to …
View article: Sensitivity of the Wave Field to High Time-Space Resolution Winds during a Tropical Cyclone
Sensitivity of the Wave Field to High Time-Space Resolution Winds during a Tropical Cyclone Open
The impact of the high space-temporal variability of the wind field during the moderate and intense storm stages of a tropical cyclone on the wave field as computed by the numerical model WaveWatch III is investigated in this work. The rea…
View article: On the effect of ocean surface waves on air-sea interactions: results from in-situ and remote measurements in the Gulf of Mexico.
On the effect of ocean surface waves on air-sea interactions: results from in-situ and remote measurements in the Gulf of Mexico. Open
Ocean surface wave full directional spectrum is estimated directly from measurements obtained with a spar buoy and from synthetic aperture radar images of the sea surface. These two techniques complement each other to provide us with a rat…
View article: Ocean surface wave and turbulence characteristics from direct measurements with a velocity sensor deployed in a buoy
Ocean surface wave and turbulence characteristics from direct measurements with a velocity sensor deployed in a buoy Open
<p>There is great interest in acquiring directional ocean surface wave direct measurements in order to better determine sea state conditions in open waters as well as in harbors and nearshore sites.<span>&#160;</span>…
View article: Effect of high spatial and temporal resolution of the wind field on the evolution of the wave field in a hurricane
Effect of high spatial and temporal resolution of the wind field on the evolution of the wave field in a hurricane Open
<p>It is generally accepted that the typical average wind field in a hurricane is well described by a parametric Holland model. The spatial distribution of winds can be determined from data provided by the National Hurricane Center w…
View article: Studies of Sub-Mesoscale Variability of the Ocean Upper Layer Based on Satellite Observations Data
Studies of Sub-Mesoscale Variability of the Ocean Upper Layer Based on Satellite Observations Data Open
Purpose. The approach represented in the article is applied to analysis of satellite scanner optical images of high spatial resolution for identifying and quantitative determining the characteristics of the sub-mesoscale dynamic processes …
View article: Monitoring Intense Oceanic Fronts Using Sea Surface Roughness: Satellite, Airplane, and In Situ Comparison
Monitoring Intense Oceanic Fronts Using Sea Surface Roughness: Satellite, Airplane, and In Situ Comparison Open
Sea surface roughness is affected by surface current gradients, which provides a means of monitoring from satellite sharp oceanic fronts. This paper is the second report of an experiment designed to compare observations of sea surface roug…
View article: Ocean surface wave dynamics, energy and momentum air-sea transfer under a variety of wind and waves conditions
Ocean surface wave dynamics, energy and momentum air-sea transfer under a variety of wind and waves conditions Open
<p>Direct measurements have been conducted from a spar buoys deployed in the Gulf of Mexico, and in the vicinity of Todos Santos Island, offshore Ensenada BC, Mexico, in order to better understand ocean surface wave modulated process…
View article: Global Observations of Fine-Scale Ocean Surface Topography With the Surface Water and Ocean Topography (SWOT) Mission
Global Observations of Fine-Scale Ocean Surface Topography With the Surface Water and Ocean Topography (SWOT) Mission Open
The future international Surface Water and Ocean Topography (SWOT) Mission, planned for launch in 2021, will make high-resolution 2D observations of sea-surface height using SAR radar interferometric techniques. SWOT will map the global an…
View article: Intense deformation field at oceanic front inferred from directional sea surface roughness observations
Intense deformation field at oceanic front inferred from directional sea surface roughness observations Open
Fine‐scale current gradients at the ocean surface can be observed by sea surface roughness. More specifically, directional surface roughness anomalies are related to the different horizontal current gradient components. This paper reports …
View article: Small‐scale open ocean currents have large effects on wind wave heights
Small‐scale open ocean currents have large effects on wind wave heights Open
Tidal currents and large‐scale oceanic currents are known to modify ocean wave properties, causing extreme sea states that are a hazard to navigation. Recent advances in the understanding and modeling capability of open ocean currents have…
View article: Surface Roughness Changes by Finescale Current Gradients: Properties at Multiple Azimuth View Angles
Surface Roughness Changes by Finescale Current Gradients: Properties at Multiple Azimuth View Angles Open
At times, high-resolution images of sea surface roughness can provide stunning details of submesoscale upper-ocean dynamics. As interpreted, transformations of short-scale wind waves by horizontal current gradients are responsible for thos…
View article: Analysis of Dual-Frequency Ocean Backscatter Measurements at Ku- and Ka-Bands Using Near-Nadir Incidence GPM Radar Data
Analysis of Dual-Frequency Ocean Backscatter Measurements at Ku- and Ka-Bands Using Near-Nadir Incidence GPM Radar Data Open
Global colocalized ocean surface measurements using the Global Precipitation Measurement near-nadir dual-frequency Ku- and Ka-band microwave measurements are analyzed and compared. Focusing on the Ka and Ku cross-sections fall-off with inc…