Results 81 to 90 of about 639 (194)

Changes in MJO Teleconnections in the Southeast U.S. Under Global Warming in the CESM2 Large Ensemble

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract We examined projected changes in Madden–Julian Oscillation (MJO) teleconnections over North America using 90 ensemble members from the Community Earth System Model Version 2 Large Ensemble (CESM‐LENS2) under the SSP370 scenario. In the warmer climate, the classic PNA‐like teleconnection strengthens and shifts eastward, with large ensemble ...
Jingxuan Cui, Eric D. Maloney
wiley   +1 more source

The Dynamics of Intraseasonal Atmospheric Angular Momentum Oscillations

Journal of the Atmospheric Sciences, 1997
Abstract The global and zonal atmospheric angular momentum (AAM) budget is computed from seven years of National Centers for Environmental Prediction data and a composite budget of intraseasonal (30–70 day) variations during northern winter is constructed.
Klaus M. Weickmann, George N. Kiladis, Prashant D. Sardeshmukh   +2 more
openaire   +1 more source

Benchmarking the Dynamic Modes of Stratosphere‐Troposphere Coupling in Northern Annular Modes (NAM) in CMIP6 Models

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The downward influence of extreme stratospheric events is typically described by the evolution of the Northern Annular Mode (NAM) across atmospheric levels. However, the dynamics and uncertainty in vertical coupling are not fully resolved. By applying the linear inverse model (LIM) to daily, multi‐level NAM indices from reanalysis and CMIP6 ...
Gang Chen, Xiuyuan Ding
wiley   +1 more source

Stratospheric Antarctic Intraseasonal Oscillation during the Austral Winter.

Journal of the Meteorological Society of Japan. Ser. II, 2002
This study discovered an eastward-propagating circulation pattern in the stratosphere of the Southern Hemisphere based on the Met Office stratospheric assimilated data and the TOMS total ozone. This pattern is named the Stratospheric Antarctic Intraseasonal Oscillation (SAIO) because of its intraseasonal time scale and its repeated appearance in the ...
Hsu, Huang-Hsiung, WENG, Shu-Ping
openaire   +2 more sources

Sources of Subseasonal Predictability for Precipitation in South America Based on Model Experiments

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.
Abstract This study investigates the sources of predictability underlying subseasonal precipitation skill over South America in existing subseasonal prediction systems. Using subseasonal re‐forecasts from the NCAR‐CESM2 model, we demonstrate that significant skill persists even when interannual variability is removed.
Kathy Pegion, Emily Becker, Ben P. Kirtman   +2 more
wiley   +1 more source

A Simple Model of Convectively Coupled Equatorial Rossby Waves

Journal of Advances in Modeling Earth Systems, 2019
Intraseasonal oscillations affect the weather not just in the tropics but all around the globe. The convectively coupled equatorial Rossby wave is observed as the westward‐moving intraseasonal oscillation. The fundamental physics of its coupling is still
Željka Fuchs‐Stone, David J. Raymond, Stipo Sentić   +2 more
doaj   +1 more source

Intraseasonal Oscillations during the TOGA-COARE IOP

Journal of the Meteorological Society of Japan. Ser. II, 1995
We examined the behavior of the convective activity and other meteorological variables such as divergence, velocity potential and total precipitable water, associated with the intraseasonal oscillation (ISO) during the TOGA-COARE IOP from November 1992 to February 1993.
openaire   +2 more sources

Multiscale Interactions between Local Short- and Long-Term Spatio-Temporal Mechanisms and Their Impact on California Wildfire Dynamics

Fire
California has experienced a surge in wildfires, prompting research into contributing factors, including weather and climate conditions. This study investigates the complex, multiscale interactions between large-scale climate patterns, such as the Boreal
Stella Afolayan, Ademe Mekonnen, Brandi Gamelin, Yuh-Lang Lin   +3 more
doaj   +1 more source

Intraseasonal oscillation associated with the Indian winter monsoon [PDF]

Journal of Geophysical Research: Atmospheres, 2013
The Indian winter (December–February) monsoon (IWM) contributes almost one third of the annual precipitation over the western Himalayas (WH). In winter, eastward moving synoptic weather systems, or “western disturbances” (WDs), yield precipitation in either liquid or solid form. Although previous studies have examined the interannual variation (IAV) of
openaire   +1 more source

Distinct manifestations of austral summer tropical intraseasonal oscillations

Geophysical Research Letters, 2013
Event‐to‐event intraseasonal convection is found to be significantly different from a canonical Madden‐Julian oscillation (MJO). Nearly half of all austral summer events do not show the same initiation or propagation characteristics of canonical MJOs, although they meet some MJO criteria during their life cycles.
Fernando E. Hirata, Peter J. Webster, Violeta E. Toma   +2 more
openaire   +1 more source