Results 41 to 50 of about 645,962 (239)

A New Hydroclimatic Signature: Negative NAO Dominance Under Weak La Niña Conditions During the 2025–2026 Northwest Africa Floods

International Journal of Climatology, EarlyView.
Conceptual hydroclimatic pathway linking the concurrent negative North Atlantic Oscillation (NAO) phase and weak La Niña conditions to extreme February rainfall and flash flooding in Northwest Africa. ABSTRACT The winter of 2025–2026 in Morocco exhibited a rapid hydroclimatic transition from prolonged drought to widespread flooding, representing an ...
Afshin Amiri, Silvio Jose Gumiere, Hossein Bonakdari   +2 more
wiley   +1 more source

Equatorial wave circulation associated with subseasonal convective variability over the subtropical western North Pacific in boreal summer [PDF]

Weather and Climate Dynamics
Atmospheric convection over the subtropical western North Pacific (SWNP) during boreal summer varies on timescales of around 10 d, with significant effects on both local and remote circulation.
P. Chen, P. Chen, P. Chen, K. M. Holube, F. Lunkeit, N. Žagar, Y.-B. Zhao, R. Lu, R. Lu   +8 more
doaj   +1 more source

Solitonic interactions for Rossby waves with the influence of Coriolis parameters

Results in Physics, 2021
In the current study, the Rossby waves envelope near the equator is studied starting from a potential vorticity equation with the horizontal component of Coriolis parameter.
XiaoJun Yin, QuanSheng Liu, ShengYun Ma, ShuTing Bai   +3 more
doaj   +1 more source

Structure and Propagation of Mesoscale Cyclonic Eddies in the Brazil–Malvinas Confluence

International Journal of Climatology, EarlyView.
Between 1993 and 2022, 1386 cyclonic eddies were identified in the Brazil–Malvinas Confluence, one of the most energetic regions of the South Atlantic. While most eddies dissipated locally, a smaller number of individuals, more energetic, and longer lived propagated predominantly south‐westward and north‐eastward, driven by topographic constraints and ...
Rafaella Oliveira Santos, Ilson Carlos Almeida da Silveira, Fabricio Sanguinetti Cruz de Oliveira   +2 more
wiley   +1 more source

Intensified Impact of Winter Arctic Oscillation on Simultaneous Precipitation Over the Mid–High Latitudes of Asia Since the Early 2000s

Frontiers in Earth Science, 2021
This study reveals an intensified impact of winter (November–February mean) Arctic Oscillation (AO) on simultaneous precipitation over the mid–high latitudes of Asia (MHA) since the early 2000s.
Haibo Zhou, Haibo Zhou, Ke Fan
doaj   +1 more source

Dynamics and thermodynamics of the fast and slow Madden–Julian Oscillation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The results of this study highlight the MJO as a complex phenomenon, the behavior of which is driven by an interplay of thermodynamic and dynamic processes. The MJO's distinct speeds are controlled by different mechanisms: slow MJOs propagate eastward primarily via horizontal moisture advection, fast MJOs by vertical moisture advection.
Víctor C. Mayta, Ángel F. Adames Corraliza, Katharina M. Holube, Qiao‐Jun Lin   +3 more
wiley   +1 more source

Resonant Forcing of Oceanic and Atmospheric Rossby Waves in (Sub)Harmonic Modes: Climate Impacts

Atmosphere
Baroclinic wave resonance, particularly Rossby waves, has attracted great interest in ocean and atmospheric physics since the 1970s. Research on Rossby wave resonance covers a wide variety of phenomena that can be unified when focusing on quasi ...
Jean-Louis Pinault
doaj   +1 more source

Dry intrusions and warm‐core development in Medicanes: Insights from a multi‐case analysis and the peculiar evolution of Ianos

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Mediterranean tropical‐like cyclones show a clear seasonality, with September cyclones exhibiting the deepest convection and Ianos representing the most extreme case. While one or more dry intrusions are typically detected during the cyclone life cycle, Ianos instead features two much weaker descending airflows.
Daniele Nigro, Lorenzo Giovannini, Simona Bordoni, Stavros Dafis, Mario Marcello Miglietta   +4 more
wiley   +1 more source

Rossby Wave and Pure Rotational Wave [PDF]

Journal of the Atmospheric Sciences, 1972
In this note the proof of the relation that exists at the equator between speed of a pure rotational wave and wavelengths of streamlines and trajectory (Asnani1972) has been provided. Also the proof of the idea of Constant Absolute Spin (C.A.S.) trajectory as distinct from Constant Absolute Vorticity (C.A. V.) trajectory developed is presented.
openaire   +2 more sources

The physical and synoptic‐dynamical differences between warm days, hot days, and heatwaves during summer in Victoria, Australia

Quarterly Journal of the Royal Meteorological Society, EarlyView.
During the day, there is composite mean cold advection in the boundary layer on warm days (WDs), hot days (HDs) and heatwaves (HWs). There is weaker surface‐sensible heating on HDs and HWs. A nocturnal jet advects warm air on HDs and HWs. There is a strong and slow‐moving upper‐level anticyclone on HWs.
Qinuo Huang, Michael J. Reeder, Christian Jakob, Malcolm J. King   +3 more
wiley   +1 more source