Abstract Midlatitude atmospheric blocking events are important drivers of long-lasting extreme weather conditions at regional to continental scales. However, modern climate models consistently underestimate their frequency occurrence compared observations, casting doubt on future projections extremes. Using the prominent and largely underestimated winter in Europe as a test case, this study fir...

Advancing the representation of uncertainties in ocean general circulation numerical models is required for several applications, ranging from data assimilation to climate monitoring and extended-range prediction systems. The atmospheric forcing represents one main uncertainty sources models. Here, we formulate revise different approaches perturb air-sea fluxes used within boundary conditions. ...

atmospheric circulation patterns are responsible for drought and flood occurrences around the globe specifically in moderate mid latitude climates. while some circulation patterns are responsible for wet spells and floods as well, the drought events can be attributed to some other circulation patterns. therefore, identification and distinction of dry/wet producing patterns and the geographical ...

In this paper we present some results on the implementation of atmosphere and ocean circulation models on massively parallel computers. These circulation models are enormous computationally demanding tasks and play an indispensable role in climate modelling. Therefore they have an important impact on society. After a brief introduction on the physics behind the circulation models based on geo-p...

The influence of clouds on the large-scale atmospheric circulation is examined in numerical simulations from an atmospheric general circulation model run with and without atmospheric cloud radiative effects (ACRE). In the extratropics of both hemispheres, the primary impacts of ACRE on the circulation include 1) increases in the meridional temperature gradient and decreases in static stability ...

A hybrid coupled model (HCM) for the tropical Paci®c ocean-atmosphere system is employed for ENSO prediction. The HCM consists of the Geophysical Fluid Dynamics Laboratory ocean general circulation model and an empirical atmospheric model. In hindcast experiments, a correlation skill competitive to other prediction models is obtained, so we use this system to examine the e€ects of several initi...

3 This paper examines the sensitivity of atmospheric pCO2 to changes in ocean biol4 ogy that result in drawdown of nutrients at the ocean surface. We show that the global 5 inventory of preformed nutrients is the key determinant of atmospheric pCO2 and the 6 oceanic carbon storage due to the soft tissue pump (OCSsoft). We develop a new the7 ory showing that under conditions of perfect equilibri...

It was reported that after the magnitude 9.0 earthquake and resulting tsunami that occurred on March 11, 2011, some radioactive material, including iodine and cesium, was discharged into the Pacific Ocean because of the Fukushima Daiichi nuclear power plant (NPP) disaster. High concentrations of I and Cs were found in the seawater and seabed sediment along the coastline of Fukushima Prefecture....