Examining the North Atlantic Oscillation, East Atlantic Pattern, and Jet Variability since 1685

North Atlantic climate variability: The role of the North Atlantic Oscillation

Article history: Marine ecosystems are und Received 22 November 2006 Received in revised form 14 May 2007 Accepted 24 November 2008 Available online 20 February 2009

Variability of the North Atlantic eddy-driven jet stream

Much of the atmospheric variability in the North Atlantic sector is associated with variations in the eddy-driven component of the zonal flow. Here we present a simple method to specifically diagnose this component of the flow using the low-level wind field (925-700 hPa). We focus on the North Atlantic winter season in the ERA-40 reanalysis. Diagnostics of the latitude and speed of the eddy-dri...

The Role of Atlantic Ocean-Atmosphere Coupling in Affecting North Atlantic Oscillation Variability

We review the role of ocean-atmosphere interactions over the Atlantic sector in North Atlantic Oscillation (NAO) variability. The emphasis is on physical mechanisms, which are illustrated in simple models and analyzed in observations and numerical models. Some directions of research are proposed to better assess the relevance of Atlantic air-sea interactions to observed and simulated NAO variab...

North Atlantic Multidecadal SST Oscillation: External forcing versus internal variability

Synoptic View of the North Atlantic Oscillation

This article investigates the synoptic characteristics of individual North Atlantic Oscillation (NAO) events by examining the daily evolution of the potential temperature field on the nominal tropopause (the 2-PVU surface). This quantity is obtained from the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) reanalysis dataset for the winter seaso...