Results 51 to 60 of about 5,527 (257)

Analysis of Climate Variability of Homogeneous Regions of Rainfall Anomalies in Southeast South America (SESA)

International Journal of Climatology, EarlyView.
We studied rainfall variability and cyclicity in six Homogeneous Regions of Rainfall Anomalies (HRRA) in Southeast South America (SESA) from 1961 to 2020 to understand the occurrence of droughts and above‐average rainfall. We use a continental analysis scale, focusing on seasonal, interannual, and interdecadal cycles, and their association with modes ...
Tainã Costa Peres, Francisco Eliseu Aquino, Denilson Ribeiro Viana, Éder Leandro Bayer Maier, Pedro Teixeira Valente   +4 more
wiley   +1 more source

Asymmetric Response of the North Atlantic Gyres to the North Atlantic Oscillation

Journal of Geophysical Research: Oceans
Abstract The North Atlantic Oscillation (NAO) is a leading mode of atmospheric variability, affecting the North Atlantic Ocean on sub‐seasonal to multi‐decadal timescales. The NAO changes the atmospheric forcing at the ocean's surface, including winds and surface buoyancy fluxes, both of which are known to impact large‐scale gyre ...
Dhruv Bhagtani, Andrew McC. Hogg, Ryan M. Holmes, Navid C. Constantinou, Hemant Khatri   +4 more
openaire   +2 more sources

Tracking Summer Greenland Blocking: The Upstream Pathway Shapes Historical Extremes and Future Change

International Journal of Climatology, EarlyView.
This study investigates summer Greenland atmospheric blocking using the Lagrangian tracking Python package blocktrack applied to ERA5 reanalysis and CMIP6 models. Two types of blocks—upstream (Northern Canada origin) and retrograding (Northern Atlantic origin)—are distinguished, with upstream blocks driving recent observed frequency increasing trends ...
Michele Filippucci, Jacob Maddison, Simona Bordoni   +2 more
wiley   +1 more source

A multivariate probabilistic framework for tracking the regional tropical edges: analysis of inter-annual variations and long-term trends

Environmental Research Letters
In the present study, a multivariate probabilistic framework is used to identify the meridional positions of regional tropical edges (RTEs), which are based on two variables: sea level pressure and precipitation minus evaporation. This new defined metric
Xinxian Feng, Weichen Tao, Gang Huang, Yongyun Hu, William K M Lau, Xia Qu, Kaiming Hu, Ya Wang   +7 more
doaj   +1 more source

Early deglaciation history of the southeastern Baffin Island shelf (Eastern Canadian Arctic Archipelago)

Journal of Quaternary Science, EarlyView.
ABSTRACT During the last glacial period, the Laurentide Ice Sheet (LIS) was the largest terrestrial ice sheet on Earth. Its evolution since the Last Glacial Maximum profoundly influenced Earth's geodynamics and surface processes. Investigating the past dynamics of the LIS provides critical insights into how contemporary ice sheets may respond to ...
Alexis P. Belko, Alexandre Normandeau, Patrick Lajeunesse, Audrey Limoges   +3 more
wiley   +1 more source

Deglaciation of the Burren glacio‐karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification

Journal of Quaternary Science, EarlyView.
Abstract The Burren uplands in western Ireland form one of the most extensive and best‐preserved examples of glacio‐karst in Europe. Subsumed by the Irish ice sheet during the Late Pleistocene, granite erratic boulders and in situ silica veins in the limestone bedrock provide a rare opportunity to reconstruct the timing and rate of deglaciation ...
Gordon Bromley, Colin Bunce, Brenda Hall, Aaron Putnam, Frank McDermott   +4 more
wiley   +1 more source

ENSO-driven abrupt phase shift in North Atlantic oscillation in early January

npj Climate and Atmospheric Science, 2023
El Niño-Southern Oscillation (ENSO) teleconnections exhibit a strong dependency on seasonally and intraseasonally varying mean states, leading to impactful short-term variations in regional climate. The North Atlantic Oscillation (NAO)-ENSO relation is a
Xin Geng, Jiuwei Zhao, Jong-Seong Kug
doaj   +1 more source

Seasonality of the North Atlantic Oscillation

Journal of Climate, 2001
Abstract Monthly sea level pressure (SLP) data from the National Centers for Environmental Prediction reanalysis for 1948–99 are used to develop a seasonally and geographically varying “mobile” index of the North Atlantic oscillation (NAOm). NAOm is defined as the difference between normalized SLP anomalies at the locations of maximum negative ...
Diane H. Portis, John E. Walsh, Mostafa El Hamly, Peter J. Lamb   +3 more
openaire   +1 more source

Late Quaternary climatic variability in the Eastern Mediterranean recorded in Hermes Cave, Corinth Rift, Greece

Journal of Quaternary Science, EarlyView.
ABSTRACT The Greek peninsula lies at the intersection of major atmospheric circulation systems, making it a key location for reconstructing past climate variability in the Eastern Mediterranean. In this study, we present a new high‐resolution multi‐proxy speleothem record from Hermes Cave, located on the shoulder of the Corinth Rift in southern Greece.
Ch. Pennos, S. Pechlivanidou, S. Modestou, A. Persoiu, S.F.M. Breitenbach, U. Ninnemann, R.L. Gawthorpe, J. Maccali, S‐E. Lauritzen, R.Ø. Skoglund, Th. Thuesen   +10 more
wiley   +1 more source

Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model [PDF]

Climate of the Past, 2013
Studies addressing climate variability during the last millennium generally focus on variables with a direct influence on climate variability, like the fast thermal response to varying radiative forcing, or the large-scale changes in atmospheric dynamics
P. Ortega, M. Montoya, F. González-Rouco, H. Beltrami, D. Swingedouw   +4 more
doaj   +1 more source