Local anthropogenic aerosol sources effect on winter clouds and precipitation in the Colorado Park Range

Includes bibliographical references

Climatic variations on Mars: 2. Evolution of carbon dioxide atmosphere and polar caps

The long-term variations in the atmospheric pressure and the polar cap temperature of Mars resulting from the obliquity oscillations (presented by W. R. Ward, 1974) are discussed. In performing these calculations, the assumption is made that the atmosphere is in equilibrium with perennial CO_2 ice deposits at the north pole, as is proposed by R. B. Leighton and B. C. Murray (1966). If heat transport by the atmosphere is neglected, the temperature of CO_2 ice at the poles ranges from ∼130°K to ∼160°K, the corresponding atmospheric pressure rising from a few tenths of a millibar to ∼30 mbar, respectively. The neglect of atmospheric heat transport probably underestimates the peak pressure. Because the altitude of the south cap is ∼2 km higher than that of the north cap, CO_2 ice is unstable there and will migrate to the north cap at a rate ∼10 g/cm^2 yr, the implication being that the south residual cap is water ice. A simplified model of the annual polar caps and pressure fluctuations is also presented. This indicates that when the obliquity is at its maximum, the annual caps may be greatly enlarged in both mass and maximum coverage. The modifications introduced by including significant atmospheric heat transport are then discussed. Finally, the implications of different past climatic conditions on the mechanism of eolian erosion are briefly considered

Mitochondrial Intergenic Spacer in Fairy Basslets (Serranidae: Anthiinae) and the Simultaneous Analysis of Nucleotide and Rearrangement Data

We present the results of a study that implements a recently developed phylogenetic algorithm that combines fixed-states nucleotide optimization with breakpoint analysis to identify and examine the evolution of a mitochondrial intergenic spacer between the tRNAVal and 16S rRNA loci in a clade of fairy basslets (Serranidae: Anthiinae). The results of the analysis indicate that this spacer evolved once and that it may be increasing in size through evolutionary time. The resulting molecular hypothesis corroborates much of the previous morphological phylogenetic work.We would like to thank J. Smith (Los Alamos National Laboratory) and J. Faivovich, T. Grant, K. Pickett, J. Sparks, M. Stiassny, and K. Tang (all at or formerly at the American Museum of Natural History [AMNH]) for discussing aspects of this project with us. We are grateful to H. Endo (Kochi University), the Gahan Family, J. Leis and M. McGrouther (Australian Museum), Reef and Fin (Stamford, CT), and H. Walker (Scripps Institution of Oceanography) for providing specimens used in this study. This project was supported by funding from the AMNH Lerner-Gray Program for Marine Research, the NASA–Ames Fundamental Space Biology Program, the Field Museum of Natural History, and the National Science Foundation (DEB-0405246 and DEB-0732642)

Self-regulation of sex offending, future pathways and the Good Lives Model : applications and problems

Two theoretical developments, the Self-Regulation Model of the Offence and Relapse Process and the Good Lives Model, have recently offered promise in the advancement of sex offender treatment. The present paper represents a preliminary attempt to operationalize these theoretical principles by developing a number of practical treatment procedures. We have employed the method of a life map, which traces personal development from birth and which incorporates long-term future projections. This includes all actions, events, incidents and skills (whether positive or negative), which have led to a sense of self-esteem and the development of personal values. These will include risk factors and criminogenic needs which lead to offending as well as positive experiences and self-resources which can be incorporated into a future Good Lives Pathway. Two case illustrations are presented, which demonstrate the way in which all experiences from the past can be incorporated into alternative future pathways. These pathways will include positive self-resources and protective variables which develop into a non-offending future and negative self-resources with risk variables which develop into an offending future. The cases illustrate the way in which GLM and self-regulation pathways can be combined in a robust practical treatment procedure. Practical difficulties inherent in the procedure are also discussed

Initial state‐selected reaction probabilities for OH+H2→H+H2O and photodetachment intensities for HOH− 2

This is the publisher's version, also available electronically from http://scitation.aip.org/content/aip/journal/jcp/101/10/10.1063/1.468057.We have used a discrete variable representation (DVR) with absorbing boundary conditions (ABC) to calculate initial state‐selected reaction probabilities and photodetachment intensities. We apply this method to the OH+H2reaction constrained to a plane with the OH bond frozen. The calculated reaction probabilities have all the qualitative features observed in full dimensional calculations. We have similarly computed arrangement‐selected photodetachment intensities for one geometry of the HOH− 2 anion. The resulting spectrum has a dominant peak which will present a test of the neutral potential energy surface upon comparison with experimental results

Oxidation chemistry of d^0 organometallic complexes

Electron-transfer processes can play an important role in organometallic chemistry. Herein, we demonstrate that even d^0 organometallic complexes exhibit a rich redox chemistry and present electrochemical, kinetics, and stereochemical studies that establish a general outer-sphere oxidation process for d^0 group 4 metallocene complexes. This oxidation chemistry closely parallels the reported LMCT photochemistry of these complexes

Astronomical Sky Quality Near Eureka, in the Canadian High Arctic

Nighttime visible-light sky brightness and transparency are reported for the Polar Environment Research Laboratory (PEARL), located on a 610-m high ridge near the Eureka research station, on Ellesmere Island, Canada. Photometry of Polaris obtained in V band with the PEARL All Sky Imager (PASI) over two winters is supported by standard meteorological measurements and visual estimates of sky conditions from sea level. These data show that during the period of the study, October through March of 2008/09 and 2009/10, the sky near zenith had a mean surface brightness of 19.7 mag/square-arcsec when the sun was more than 12 deg below the horizon, reaching 20.7 mag/square-arcsec during astronomical darkness with no moon. Skies were without thick cloud and potentially usable for astronomy 86% of the time (extinction <2 mag). Up to 68% of the time was spectroscopic (<0.5 mag), attenuated by ice crystals, or clear with stable atmospheric transparency. Those conditions can persist for over 100 hours at a time. Further analysis suggests the sky was entirely free of ice crystals (truly photometric) 48+/-3% of the time at PEARL in winter, and that a higher elevation location nearby may be better.Comment: 14 pages, 1 table, 11 figures; accepted for publication in PAS