The invasion of smooth cordgrass (Spartina alterniflora Loisel.) has greatly threatened China's coastal salt marshes, yet how geomorphic landscape features, such as tidal channel meanders, influence processes remains unclear. We found that lower hydrodynamic disturbance, bed shear stress, and higher propagule pressure triggered by eddies due to the convex structure meanders facilitated seedling...

Abstract The western boundary current system off southeastern Brazil is composed of the poleward-flowing Current (BC) in upper 300 m and equatorward flowing Intermediate Western Boundary (IWBC) underneath it, forming a first-baroclinic mode structure mean. Between 22° 23°S, BC-IWBC jet develops recurrent cyclonic meanders that grow quasi-stationarily via baroclinic instability, though their tri...

Large rivers play crucial roles in determining locations of civilization, biodiversity, and efflux to the oceans. The paths they take across Earth's surface vary with scale. At long-wavelengths can have simple flow paths. smaller scales, meanders for example, their change rapidly as a consequence lithology, biota, other environmental variables. It is not straightforward identify scales at which...

Computing expected values of functions involving extreme values of diffusion processes can find wide applications in financial engineering. Conventional discretization simulation schemes often converge slowly. We propose a Wiener-measure-decomposition based approach to construct unbiased Monte Carlo estimators. Combined with the importance sampling technique and the Williams path decomposition ...

The Lorentz model constitutes a reference model for transport in disordered materials. Here a tracer meanders through an array of frozen obstacles which in the simplest variant are assumed to be distributed independently. As the density of scatterers increases, the regions of excluded volume start to overlap until eventually long-range transport ceases to exist entirely. This localization trans...

We address the meander problem “enumerate all topologically inequivalent configurations of a closed nonselfintersecting plane curve intersecting a given line through a fixed number of points”. We show that meanders may be viewed as the configurations of a suitable fully-packed loop statistical model defined on a random surface. Using standard results relating critical singularities of a lattice...