Results 121 to 130 of about 14,203 (319)

Oceanic Feedback to the Atmosphere for Anomalous SST Events Peaking in Early Winter in the Northeast Pacific

Geophysical Research Letters, Volume 52, Issue 10, 28 May 2025.
Abstract In the past decade, large‐scale and persistent warm sea surface temperature anomalies (SSTA) occurred frequently in the mid‐latitude Northeast Pacific (NEP), offering a valuable opportunity to further illuminate the oceanic feedback to the atmosphere, which has been a complex issue for mid‐latitude ocean‐atmosphere interaction.
Xi Hu, Jian Shi, Xiaohui Ma, Yanjing Tang, Zhao Jing   +4 more
wiley   +1 more source

Gravitational potential, inertia and Earth rotation [PDF]

Dans Journ\'ees 2002 - syst\`emes de r\'ef\'erence spatio-temporels. - Astrometry from ground and from space, Bucarest : Roumanie (2002), 2007
Several satellite missions, devoted to the study of the Earth gravity field, have been launched (like CHAMP, recently). This year, GRACE (Gravity Recovery and Climate Experiment) will allow us to obtain a more precise geoid. But the most important is that they will supply the temporal variations of the geopotential coefficients (called Stokes ...
arxiv  

Impact of Penetrating Kelvin Waves on MJO Rainfall Propagation Through Deep Convection Modulation

Geophysical Research Letters, Volume 52, Issue 10, 28 May 2025.
Abstract The Madden‐Julian Oscillation (MJO) is a dominant intraseasonal oscillation in the tropics. As MJOs propagate over the Indian Ocean, some of them can be penetrated by fast‐moving equatorial Kelvin waves originating to the west of the MJOs.
Xingchao Chen, L. Ruby Leung, Zhe Feng
wiley   +1 more source

Resonance Effect on the Geosynchronous Orbit due to the Non-Zonal Geopotential [PDF]

Journal of Astronomy and Space Sciences, 1990
Resonance effect on the orbital elements of geosynchronous artificial satellite due to the non-zonal geopotential has been calculated. For the perturbation of a artificial satellite, perturbation effects due to the non-zonal geopotential is less than due
Jong-Uk Park, In-Sang Moon, Kyu-Hong Choi, Yong-Seok Choi   +3 more
doaj  

Earth Orientation and Temporal Variations of the Gravity Field [PDF]

Dans SF2A-2004: Semaine de l'Astrophysique Francaise - SF2A-2004: Semaine de l'Astrophysique Francaise, Paris : France (2004), 2007
The high accuracy now reached in the VLBI Earth Orientation Parameters (EOP) determination requires looking further at the various geophysical contributions to variations in EOP. The determination of the Earth gravity field from space geodetic techniques now allows us to obtain the temporal variations of the low degree coefficients of the geopotential,
arxiv  

Climate‐Dependency of Impact of Increased Carbon Dioxide on African Monsoon Rainfall: Insights From Model Simulations

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Previous studies on future scenarios identified two key effects of increasing CO2 ${\text{CO}}_{2}$ on the African summer monsoon (ASM): Rising CO2 ${\text{CO}}_{2}$ leads to an enhancement in moisture supply, favoring an increase in ASM precipitation (the thermodynamic effect). However, it also results in a weakening in mean atmospheric flow,
Xiaoxu Shi, Martin Werner, Francesco S. R. Pausata, Jiping Liu, Roberta D’Agostino, Yongyun Hu, Hu Yang, Hang Wang, Chaoyuan Yang, Gerrit Lohmann   +9 more
wiley   +1 more source

Distinct Intraseasonal Oscillation Modes Over the Tropical Indo‐Pacific Oceans

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract In boreal winter, the Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal oscillation (ISO), which bridges weather and climate. In addition to the dominant eastward propagating MJO mode, this study identifies the existence of the westward propagating and stationary oscillating ISO modes according to the spatio ...
Yiran Li, Haibo Hu, Fei Liu, Matthew Patterson, Xiu‐Qun Yang, Kecheng Lu, Kefeng Mao, Ziyi Wang, Rongrong Wang   +8 more
wiley   +1 more source

Understanding MJO Teleconnections to the Southern Hemisphere Extratropics During El Niño, La Niña, and Neutral Years

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract The Madden‐Julian Oscillation (MJO) and the El Niño‐Southern Oscillation (ENSO) are the two major tropical climate modes important for weather and climate predictability and teleconnections on sub‐seasonal to seasonal timescales. Although the modulation of MJO teleconnections by ENSO has been extensively studied for the Northern Hemisphere ...
Raina Roy, Julie M. Arblaster, Matthew C. Wheeler, Eun‐Pa. Lim   +3 more
wiley   +1 more source

Linking European Temperature Variations to Atmospheric Circulation With a Neural Network: A Pilot Study in a Climate Model

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract In Europe, temperature variations are mainly driven by the North Atlantic atmospheric circulation. Here, with data from the MIROC6 large ensemble, we investigate a convolutional neural network (a UNET) for reconstructing daily temperature anomalies in Europe from Sea Level Pressure (SLP) as a proxy of the atmospheric circulation, and we ...
Enora Cariou, Julien Cattiaux, Saïd Qasmi, Aurélien Ribes, Christophe Cassou, Antoine Doury   +5 more
wiley   +1 more source

Inactive Tropical Cyclone Strengthens Western North Pacific Anticyclone

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Previous studies have examined the strengthening of the western North Pacific anticyclone (WNPAC) after the mature phase of El Niño from a large‐scale perspective. This study demonstrates that the intensification of WNPAC is preceded by a reduction in western North Pacific tropical cyclones (WNPTCs) approximately 2 months earlier.
Haoyu Chen, Dake Chen, Tao Lian
wiley   +1 more source