Results 121 to 130 of about 8,939,787 (291)

Integrable unsteady motion with an application to ocean eddies [PDF]

Nonlinear Processes in Geophysics, 1998
Application of the Brown-Samelson theorem, which shows that particle motion is integrable in a class of vorticity-conserving, two-dimensional incompressible flows, is extended here to a class of explicit time dependent dynamically balanced flows in ...
A. D. Kirwan, Jr., B. L. Lipphardt, Jr.
doaj  

Decadal‐scale drivers of South Pacific hydroclimate variability

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Using prescribed SST perturbations in the IGCM4 model, we investigate the mechanisms by which three major modes of low‐frequency climate variability—the IPO, AMV, and Southern Ocean SST‐driven midlatitude jet shifts—modulate the South Pacific hydroclimate.
Daniel T. Skinner, Connor Robbins, Gordon N. Inglis, Manoj Joshi, Peter Langdon, Adrian J. Matthews, Mark Peaple, Timothy J. Osborn, David A. Sear   +8 more
wiley   +1 more source

Assessing the ability of a stretched‐grid deep‐learning weather prediction model to capture physical balances

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Regional deep learning weather prediction (DLWP) models, such as Bris, offer high resolution forecasts comparable with traditional numerical weather prediction (NWP) models. We evaluated Bris against the operational MetCoOp Ensemble Prediction System (MEPS) during extratropical cyclone Poly (July 5, 2023).
Francesco Pasquini, Michiel Baatsen, Bastien François, Natalie Theeuwes, Maurice Schmeits   +4 more
wiley   +1 more source

Interaction between two quasi-geostrophic vortices of unequal potential vorticity

, 2008
In this paper we systematically investigate strong interactions between two like-signed quasi-geostrophic vortices containing different uniform potential vorticity.
Ozugurlu, Ersin, Reinaud, Jean Noel, Dritschel, David Gerard, Dritschel, David Gerard; id_orcid, Reinaud, Jean N., Reinaud, Jean Noel; id_orcid, Dritschel, David G.   +6 more
core   +1 more source

Data‐driven emulation of flow‐dependent background‐error variance in variational data assimilation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A machine‐learning approach is developed to emulate flow‐dependent background‐error variance within a variational data assimilation framework. The method reproduces uncertainty information that would normally require a 50‐member ensemble using only five members, while maintaining comparable observation fit and forecast performance.
Wei Pan, Massimo Bonavita, Marcin Chrust, Elías Hólm   +3 more
wiley   +1 more source

High resolution numerical study of the Algiers 2001 flash flood: sensitivity to the upper-level potential vorticity anomaly [PDF]

Advances in Geosciences, 2006
From 9 to 11 November 2001, intense cyclogenesis affected the northern coasts of Africa and more particularly the densely populated city of Algiers.
S. Argence, D. Lambert, E. Richard, N. Söhne, J.-P. Chaboureau, F. Crépin, P. Arbogast   +6 more
doaj  

Microfluidic Molecular Diagnostic Chips: Functional Modules, Integration Strategies, and Emerging Applications

Small Methods, EarlyView.
This comprehensive review delivers an engineering‐centric analysis of microfluidic molecular diagnostic chips, breaking them down into foundational modules from fluid manipulation to bio‐sensing. Beyond chip design, it evaluates sample‐to‐answer integration strategies and commercial readiness levels.
Donghoon Koo, Egor Kokin, Sangyul Baik, Chanyong Park, Minji Kim, Jeongmin Kim, Ryungeun Song, Hosub Lim   +7 more
wiley   +1 more source

Identifying stratospheric ozone intrusion events in Nanjing, China

Environmental Research Communications
Stratospheric ozone (O _3 ) intrusion events (SIE) have been recognized as significant contributors to ground-level O _3 pollution. Nanjing, characterized by complex terrain and strong synoptic variability, underwent significant atmospheric changes ...
Yanjie Qian, Li Sheng, Lin Huang, Zheng Xia, Bingye Xu, Fangjian Xie, Jianlin Hu   +6 more
doaj   +1 more source

Destruction of Potential Vorticity by Winds

Journal of Physical Oceanography, 2005
Abstract The destruction of potential vorticity (PV) at ocean fronts by wind stress–driven frictional forces is examined using PV flux formalism and numerical simulations. When a front is forced by “downfront” winds, that is, winds blowing in the direction of the frontal jet, a nonadvective frictional PV flux that is upward at the sea ...
openaire   +1 more source

A WENO Finite‐Volume Scheme for the Evolution of Potential Vorticity in Isopycnal Ocean Models

Journal of Advances in Modeling Earth Systems
Ocean circulations are strongly constrained by rotation and stratification, making potential vorticity (PV) a key dynamical property. Specifically, PV is conserved following water parcels in the absence of diabatic forcing and friction—a desirable ...
Wenda Zhang, Yi‐Hung Kuo, Simone Silvestri, Alistair Adcroft, Robert Hallberg, Stephen M. Griffies   +5 more
doaj   +1 more source