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...

We present results of a numerical study of the differential equation governing the stationary states of the two-dimensional planetary atmosphere and magnetized plasma (within the Charney Hasegawa Mima model). The results show an interesting similarity with the morphology of a tropical cyclone. Quantitative comparisons are also favorable and several scaling laws can be formulated connecting the ...

The heat treatment and sintering processes are dependent on time, temperature, and atmosphere. Precisely monitoring and controlling each of these parameters can result in higher productivity and improved part quality. The LINEMOD supervisory control and monitoring software addresses these issues by estimating the thermal and physical conditions inside a furnace using mathematical models. ASM He...

The uncombed penumbral model explains the structure of the sunspot penumbra in terms of thick magnetic fibrils embedded in a magnetic surrounding atmosphere. This model has been successfully applied to explain the polarization signals emerging from the sunspot penumbra. Thick penumbral fibrils face some physical problems, however. In this contribution we will offer possible solutions to these s...

A computed list of H2 O infra-red transition frequencies and intensities is presented. The list, BT2, was produced using a discrete variable representation two-step approach for solving the rotation-vibration nuclear motions. It is the most complete water line list in existence, comprising over 500 million transitions (65% more than any other list) and it is also the most accurate (over 90% of ...

We search for faint Ca II lines in the spectra of about 800 apparently single white dwarfs observed at high resolution for the SPY (ESO Supernova Progenitor Survey) survey. Photospheric Ca is detected in 24 DAZ; in 25 mostly hot objects the observed lines must be interstellar. We also rediscover 9 strong H and K lines in helium-dominated atmospheres and discover for the first time faint lines i...

O BSERVATIONS OF enhancement in burning rates of fabrics and the unquenchabil i ty of fires in capsular environments of 100~ oxygen 1,2 prompted the present investigation. At the t ime of these observations this oxygen concentration at a pressure of 4.6 psia (equivalent to 29,000 feet) was the cabin atmosphere generally f avo red / Therefore, the initial experiments were undertaken to determine...

abstract methane concentrations in kano municipality have been attributed to the burning of solid and fossil fuels and industrial processes. using an automatic gas sampling system, methane in the kano atmosphere was determined. its distribution in the municipality was skewed towards high frequency of low concentration with a mean and standard deviation of 0.61? 0.39 ?g/m3. similarly the distri...

3 1 Brown dwarfs – an introduction 5 1.1 Brown dwarfs: objects between stars and planets . . . . . . . . . . 5 1.2 Formation models . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.2.1 Planet-like formation . . . . . . . . . . . . . . . . . . . . . 8 1.2.2 Star-like formation . . . . . . . . . . . . . . . . . . . . . . 10 1.3 Substellar evolution . . . . . . . . . . . . . . . . . . . ....

We report on searches for radio emission from three of the nearest known young brown dwarfs using the Very Large Array. We have obtained sensitive upper limits on 3.6cm emission from 2MASSW J1207334-393254, TWA 5B and SSSPM J1102-3431, all of which are likely members of the ∼8-Myr-old TW Hydrae association. We derive constraints on the magnetic field strength and the number density of accelerat...