Local Wind Regime Induced by Giant Linear Dunes: Comparison of ERA5-Land Reanalysis with Surface Measurements

Gadal, Cyril; Delorme, Pauline; Narteau, C.; Wiggs, Giles F.S.; Baddock, Matthew C.; Nield, Joanna M.; Claudin, Philippe

doi:10.1007/s10546-022-00733-6

Cited by 10 publications

(8 citation statements)

References 140 publications

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“…Gadal et al. (2022), for example, compared ERA5‐Land winds to ground observations and confirmed the ability of the ERA5‐Land data to predict the wind regime at its 9 km grid spacing for regions with relatively flat topography, which fits this study's domain of the Southeastern Coastal Plain. Silva (2022) used ERA5‐Land to study the sea breeze winds in Northeast Brazil coastal areas.…”

Section: Methodssupporting

confidence: 78%

Mapping the Spatial Footprint of Sea Breeze Winds in the Southeastern United States

et al. 2023

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A sea breeze is a mesoscale wind circulation that occurs along coastal areas worldwide when winds blow from a large body of water, such as an ocean or a large lake, toward or onto land (Miller et al., 2003;Simpson, 1994). The sea breeze is an important coastal weather phenomenon that transports cold, moist sea air masses inland, causes convective storms, and has the potential to impact air quality near the Earth's surface. The fundamental mechanism of sea breeze propagation is relatively well established-it is thermally driven by the temperature difference between land and sea and the resulting pressure gradient force (Schwartz, 2006). Pearce (1955) was the first to conclude that Coriolis-induced rotation ultimately limits inland motion of the sea breeze. Furthermore, Rotunno (1983) used a set of simplified linear motion equations to derive and estimate the maximum extent of mid-and high-latitude (latitude >30°) sea breeze inland propagation near the ground as a function of latitude (and hence Coriolis effect), atmospheric stability, and the vertical motion scale. Rotunno (1983) also concluded that the sea breeze is in the form of internal waves that extend an "infinite" distance inland for regions with latitudes less than 30°. The sea breeze is entirely limited by friction at the equator, where the Coriolis force is zero. The above equation implies that Coriolis force and atmospheric stability are the only two factors that determine the extent of sea breeze inland propagation.

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Section: Methodssupporting

confidence: 78%

Mapping the Spatial Footprint of Sea Breeze Winds in the Southeastern United States

et al. 2023

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“…We hypothesize that the strong influence of topographic roughness features such as craters or ice‐cap reentrant valleys (Chasma Boreale) on the surface wind directions on Mars, is rooted in the planet's large swings in near‐surface atmospheric stability. In stably stratified boundary layers, surface winds are isolated from the geostrophic winds aloft and as a result, tend to be slower and guided by topographic features (Gadal et al., 2022). In contrast, surface winds in a convective boundary layer tend to be faster and have an outsized influence on sand transport (Gunn et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Global Surface Winds and Aeolian Sediment Pathways on Mars From the Morphology of Barchan Dunes

Rubanenko,

Gunn,

Pérez‐López

et al. 2023

Geophysical Research Letters

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In the absence of consistent meteorological data on Mars, the morphology of dunes can be employed to study its atmosphere. Specifically, barchan dunes, which form under approximately unimodal winds, are reliable proxies for the dominant wind directions. Here, we characterize near‐surface winds on Mars from the morphology of >700,000 barchans mapped globally on the planet by a convolutional neural network. Barchan migration is predominantly aligned with known southern‐summer atmospheric circulation patterns—northerly at mid‐latitudes and cyclonic near the north pole—with the addition of an anti‐cyclonic north‐polar component that likely originates from winds emerging from the ice cap. Locally, migration directions deviate from regional trends in areas with high topographic roughness. Notably, obstacles <100 km such as impact craters are efficient at deflecting surface winds. Our database, which provides insights into planetary‐scale aeolian processes on modern‐day Mars, can be used to constrain global circulation models to assist with predictions for future missions.

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“…Different scales also frequently differ in orientation or morphology for reasons other than changes through time in wind regime. The larger dunes may modify the apparent winds for smaller superimposed or adjacent dunes, or the different scales may interact [99,101]. Often, the different scales experience different boundary conditions.…”

Section: Across-crest (Transverse)mentioning

confidence: 99%

Complementary classifications of aeolian dunes based on morphology, dynamics, and fluid mechanics

Courrech du Pont,

Rubin,

Narteau

et al. 2024

Preprint

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Dunes form where winds blow over a bed of mobile sediment grains – conditions that are common in our solar system. On Earth, dunes abound in arid continental interiors and along sandy coastlines. Dune fields have also been recognized on other planetary bodies, including Venus, Mars, Saturn’s moon Titan, and Pluto. Despite the relatively basic conditions required for their formation, dunes adopt a rich diversity of shapes, sizes, and behaviors in response to their boundary conditions and other environmental forcings. Thus, people around the globe and over centuries have developed a rich vocabulary to describe dunes and their complexity. In addition, many studies have been devoted to link dune shape to environmental forcings, usually by means of correlations. As a result, existing dune nomenclature often includes redundant terms with differing definitions across scientific communities. Although a worthy first step, correlation-based classifications can be misleading if not based on an underlying mechanics and if dune morphogenetic classes are not uniquely defined. Here, we synthesize existing dune terminology and put the last two decades of research on dune morphodynamics in perspective in proposing three simplified dune classification schemes based on the state-of-the-art understanding of dune morphology, morphogenetic processes and coupling between sand bed, fluid flow and sediment transport. Together, these classifications provide a unified framework for geomorphologists, sedimentologists, geographers, physicists, and others to describe windblown sand dunes on Earth and beyond through their shape, dynamics, and size as a response to winds and boundary conditions.

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Local Wind Regime Induced by Giant Linear Dunes: Comparison of ERA5-Land Reanalysis with Surface Measurements

Cited by 10 publications

References 140 publications

Mapping the Spatial Footprint of Sea Breeze Winds in the Southeastern United States

Mapping the Spatial Footprint of Sea Breeze Winds in the Southeastern United States

Global Surface Winds and Aeolian Sediment Pathways on Mars From the Morphology of Barchan Dunes

Complementary classifications of aeolian dunes based on morphology, dynamics, and fluid mechanics

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