Climatological planetary albedo obtained from the International Satellite Cloud Climatology Project (ISCCP) D-series flux dataset is broken down into contributions from the surface and atmosphere in cryosphere regions. The atmosphere accounts for much more of climatological planetary albedo ( 75%) than the surface at all times of the year. The insignificance of the surface contribution over hig...

In this research, the high-energy planetary mill was employed to produce nanocrystalline Ti-50Al(γ)(at%) powders. Initial powders were mechanically alloyed in 99.9999% and 90% purities of Argon and also Air atmosphere with alloying times up to 50h. The effect of impurity of Argon atmosphere on the microstructure and the rate of phase transformation of Ti-50Al were investigated during mechanical...

Julien Jumelet, Slimane Bekki, Christine David, Philippe Keckhut, G. Baumgarten. Size distribution time series of a polar stratospheric cloud observed above Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) (69N) and analyzed from multiwavelength lidar measurements during winter 2005. Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2009, 114, pp.D02202. .

NESSI: the New Mexico Tech Extra(solar)planet Spectroscopic Survey Instrument is a ground-based multi-object spectrograph that operates in the near-infrared and is being deployed this fall at the Magdalena Ridge Observatory 2.4 m telescope. When completed later this year, it is expected to be used to characterize the atmospheres of transiting exoplanets with unprecedented ground-based accuracie...

Existing time-dependent dynamic model atmospheres for AGB stars suffer from the fact that they are based on grey radiative transfer which is a poor approximation for cool line-blanketed atmospheres. Therefore, frequency-dependent radiative transfer has been included into a well-tried radiation hydrodynamics code to obtain more realistic models. First results concerning the structure of such non...

In this review, gas-phase chemistry of interstellar media and some planetary atmospheres is extended to include molecular complexes. Although the composition, density, and temperature of the environments discussed are very different, molecular complexes have recently been considered as potential contributors to chemistry. The complexes reviewed include strongly bound aggregates of molecules wit...

An apparent Ca underabundance for cool metal rich disk dwarfs was derived by Feltzing & Gustafsson (1998). This was suggested to be a NLTE effect, following the prediction by Drake (1991). New NLTE calculations with MARCS atmospheres and opacities show that deviations from LTE are very small and can not explain the underabundance. It is shown that the underabundance was primarily due to erroneo...

The capacity for dissimilatory reduction of NO(3) to N(2) (N(2)O) and NH(4) was measured in NO(3)-amended marine sediment. Incubation with acetylene (7 x 10 atmospheres [normal]) caused accumulation of N(2)O in the sediment. The rate of N(2)O production equaled the rate of N(2) production in samples without acetylene. Complete inhibition of the reduction of N(2)O to N(2) suggests that the "acet...

Molecular nitrogen (N2) comprises three-quarters of Earth's atmosphere and significant portions of other planetary atmospheres. We report a 19 per mil (‰) excess of 15N15N in air relative to a random distribution of nitrogen isotopes, an enrichment that is 10 times larger than what isotopic equilibration in the atmosphere allows. Biological experiments show that the main sources and sinks of N2...

AIM To examine the effects of a Leadership Development Initiative (LDI) on the emotional health and well-being among five levels of healthcare managers. BACKGROUND Increasingly dynamic, demanding healthcare environments result in highly stressful work atmospheres. METHODS Using quasi-experimental and mixed methods, we used regression on pre- and post-LDI survey data with 86 managers, and in...