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RISThe Antarctic Circumpolar Wave in a Coupled Ocean–Atmosphere GCM
Publisher: American Meteorological Society
Abstract: A phenomenon called the Antarctic Circumpolar Wave (ACW), suggested earlier from fragmentary observational evidence, has been simulated realistically in an extended integration of a Max Planck Institute coupled general ...
The Role of Ocean Dynamics for Low-Frequency Fluctuations of the NAO in a Coupled Ocean–Atmosphere GCM
Publisher: American Meteorological Society
Abstract: Variability at all timescales, including low-frequency variability, is found in the North Atlantic sector in a 300-yr control integration of the coupled ocean?atmosphere general circulation model (CGCM) ECHAM4/OPYC3. The ...
Transient Climate Change Simulations with a Coupled Atmosphere–Ocean GCM Including the Tropospheric Sulfur Cycle
Publisher: American Meteorological Society
Abstract: The time-dependent climate response to changing concentrations of greenhouse gases and sulfate aerosols is studied using a coupled general circulation model of the atmosphere and the ocean (ECHAM4/OPYC3). The concentrations ...
Tropical Stabilization of the Thermohaline Circulation in a Greenhouse Warming Simulation
Publisher: American Meteorological Society
Abstract: Most global climate models simulate a weakening of the North Atlantic thermohaline circulation (THC) in response to enhanced greenhouse warming. Both surface warming and freshening in high latitudes, the so-called sinking ...
On ENSO Physics
Publisher: American Meteorological Society
Abstract: Two extended integrations of general circulation models (GCMs) are examined to determine the physical processes operating during an ENSO cycle. The first integration is from the Hamburg version of the ECMWF T21 atmospheric ...
The Effect of Eurasian Snow Cover on Regional and Global Climate Variations
Publisher: American Meteorological Society
Abstract: The sensitivity of the global climate system to interannual variability of he Eurasian snow cover has been investigated with numerical models. It was found that heavier than normal Eurasian snow cover in spring leads to a ...
Tropical Pacific Climate and Its Response to Global Warming in the Kiel Climate Model
Publisher: American Meteorological Society
Abstract: A new, non-flux-corrected, global climate model is introduced, the Kiel Climate Model (KCM), which will be used to study internal climate variability from interannual to millennial time scales and climate predictability ...
Climatology and Forcing of the Quasi-Biennial Oscillation in the MAECHAM5 Model
Publisher: American Meteorological Society
Abstract: The quasi-biennial oscillation (QBO) in the equatorial zonal wind is an outstanding phenomenon of the atmosphere. The QBO is driven by a broad spectrum of waves excited in the tropical troposphere and modulates transport ...
The Influence of Sea Surface Temperatures on the Northern Winter Stratosphere: Ensemble Simulations with the MAECHAM5 Model
Publisher: American Meteorological Society
Abstract: The role of interannual variations in sea surface temperatures (SSTs) on the Northern Hemisphere winter polar stratospheric circulation is addressed by means of an ensemble of nine simulations performed with the middle ...
Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Atmospheric GCM
Publisher: American Meteorological Society
Abstract: The Monte Carlo Independent Column Approximation (McICA) method for computing domain-average radiative fluxes allows a flexible treatment of unresolved cloud structure, and it is unbiased with respect to the full ICA, but ...