Comparing Physics Scheme Performance for a Lake Effect Snowfall Event in Northern Lower Michigan

High resolution forecast models, such as those used to predict severe convective storms, can also be applied to predictions of lake effect snowfall. A high resolution WRF model forecast model is provided to support operations at NWS WFO Gaylord, Michigan, using a 12 ]km and 4 ]km nested configuration. This is comparable to the simulations performed by other NWS WFOs adjacent to the Great Lakes, including offices in the NWS Eastern Region who participate in regional ensemble efforts. Ensemble efforts require diversity in initial conditions and physics configurations to emulate the plausible range of events in order to ascertain the likelihood of different forecast scenarios. In addition to providing probabilistic guidance, individual members can be evaluated to determine whether they appear to be biased in some way, or to better understand how certain physics configurations may impact the resulting forecast. On January 20 ]21, 2011, a lake effect snow event occurred in Northern Lower Michigan, with cooperative observing and CoCoRaHS stations reporting new snow accumulations between 2 and 8 inches and liquid equivalents of 0.1 ]0.25 h. The event of January 21, 2011 was particularly well observed, with numerous surface reports available. It was also well represented by the WRF configuration operated at NWS Gaylord. Given that the default configuration produced a reasonable prediction, it is used here to evaluate the impacts of other physics configurations on the resulting prediction of the primary lake effect band and resulting QPF. Emphasis here is on differences in planetary boundary layer and cloud microphysics parameterizations, given their likely role in determining the evolution of shallow convection and precipitation processes. Results from an ensemble of seven microphysics schemes and three planetary boundary layer schemes are presented to demonstrate variability in forecast evolution, with results used in an attempt to improve the forecasts in the 2011 ]2012 lake effect season

Calcium Oxalate Crystal Production in Two Members of the Mucorales

Calcium oxalate crystals are found in association with the sporangia of Mucor hiemalis and Rhizopus oryzae. Crystals observed in each species vary in morphology from simple crystals consisting of single spines in M. hiemalis to complex crystals with twin spines, sometimes three-parted, on a common base in R. oryzae. The early development of the crystals is similar in both species with a layer of the cell wall covering in the initial crystals. The spines of M. hiemalis rapidly emerge while the crystals of R. oryzae appear to remain covered with a layer of outer wall material. The crystals of both species become fully developed just prior to spore release. Details of crystal development are compared and possible mechanisms for crystal development are explored

Morphology and Formation of an Holocene Coastal Dune Field, Bruce Peninsula, Ontario

This paper describes a dune field on the gently-sloping Lake Huron shoreline of the Bruce Peninsula, Ontario. The inland boundary is marked by a prominent dune ridge 60 m wide and up to 30 m high, which extends parallel to the shoreline for about 19 km, and was formed about 5000 years BP near the end of the Nipissing transgression. The islands and rock reefs which protect the modern shoreline were submerged under the higher lake levels, giving rise to a relatively straight, exposed beach from which sediment was supplied for building the dune ridge. Dunes formed between this ridge and the modern shoreline during the post-Nipissing regression decrease in height and continuity, reflecting decreased sediment supply associated with regression and reduced wave exposure as the offshore islands emerged. The sequence described here supports previous conclusions that transgressions are associated with periods of coastal dune formation and instability.On fait ici la description d'un champ de dunes situé sur le rivage faiblement incliné de la péninsule de Bruce, au lac Huron. La limite intérieure est caractérisée par une chaîne de dunes de 60 m de large et jusqu'à 30 m de haut qui s'étend parallèlement au rivage sur une longueur de 19 km; elle a été formée il y a 5000 ans BP, presque la fin de la transgression de Nipissing. Les îles et les écueils rocheux qui protègent le rivage actuel étaient alors immergés sous des niveaux lacustres supérieurs, permettant ainsi la formation d'une plage découverte relativement rectiligne qui a fourni le sable nécessaire à l'édification de la chaîne de dunes. La formation, au cours de la régression post-Nipissing, de dunes moins hautes et plus dispersées, entre la chaîne de dunes et le rivage actuel, témoigne d'une faible alimentation en sédiments associée à la régression et d'une moindre exposition aux vagues en raison de l'émersion des îles. La séquence décrite ici corroborent les conclusions antérieures selon lesquelles les transgressions correspondent à des périodes de formation et d'instabilité des dunes littorales.Dieser Aufsatz beschreibt ein Dùnenfeld, das am schwach abfallenden Ufer des Huron-Sees, Bruce-Halbinsel liegt. Die Grenze zum Landinnern ist hervorgehoben durch eine Kette von Dunen, die 60 m breit und bis zu 30 m hoch sind, und die sich parallel zum Ufer ùber eine Lange von 19 km ausdehnt; sie wurde vor 5000 Jahren v.u.Z. gebildet, fast am Ende der Transgression von Nipissing. Die Insein und die Felsklippen, die das heutige Ufer schùtzen, waren damais unter den hôheren Seen-Niveaus untergetaucht, so dass ein offener, relativ gerader Strand entstehen konnte, der den fur den Aufbau der Dunenkette notwendigen Sand lieferte. Wàhrend der Regression post-Nipissing haben sich zwischen der Dunenkette und dem heutigen Uferweniger hohe und mehr verstreute Dùnen gebildet, welche Zeugnis von einer schwachen Sediment-Zufuhr abgeben, in Verbindung mit der Regression und einem geringeren Einfluss der Wellen wegen des Auftauchens der Insein. Die hier beschriebene Sequenz bestàtigt frùhere Schlussfolgerungen. denen zufolge die Transgressionen mit Perioden der Bildung und Instabilitàt von Kùstendùnen in Verbindung gebracht werden

Exploring legal restrictions, regulatory reform, and geographic disparities in abortion access in Thailand

Despite decades of advocacy among Thai governmental and nongovernmental actors to remove abortion from the country’s 1957 Criminal Code, this medically necessary service remains significantly legally restricted. In 2005, in the most recent regulatory reform to date, the Thai Medical Council established regulatory measures to allow a degree of physician interpretation within the confines of the existing law. Drawing on findings from a review of institutional policies and legislative materials, key informant interviews, and informal discussions with health service providers, government representatives, and nonprofit stakeholders, this article explores how legal reforms and health policies have shaped the abortion landscape in Thailand and influenced geographic disparities in availability and accessibility. Notwithstanding a strong medical community and the recent introduction of mifepristone for medication abortion (also known as medical abortion), the narrow interpretation of the regulatory criteria by physicians further entrenches these disparities. This article examines the causes of subnational disparities, focusing on the northern provinces and the western periphery of Thailand, and explores strategies to improve access to abortion in this legally restricted setting

In situ aerosol optics in Reno, NV, USA during and after the summer 2008 California wildfires and the influence of absorbing and non-absorbing organic coatings on spectral light absorption

Hundreds of wildfires in Northern California were sparked by lightning during the summer of 2008, resulting in downwind smoke for the months of June and July. Comparisons are reported for aerosol optics measurements in Reno, Nevada made during the very smoky month of July and the relatively clean month of August. Photoacoustic instruments equipped with integrating nephelometers were used to measure aerosol light scattering and absorption coefficients at wavelengths of 405 nm and 870 nm, revealing a strong variation of aerosol light absorption with wavelength. Insight on fuels burned is gleaned from comparison of Ångström exponents of absorption (AEA) versus single scattering albedo (SSA) of the ambient measurements with laboratory biomass smoke measurements for many fuels. Measurements during the month of August, which were largely unaffected by fire smoke, exhibit surprisingly low AEA for aerosol light absorption when the SSA is highest, again likely as a consequence of the underappreciated wavelength dependence of aerosol light absorption by particles coated with non-absorbing organic and inorganic matter. Coated sphere calculations were used to show that AEA as large as 1.6 are possible for wood smoke even with non-absorbing organic coatings on black carbon cores, suggesting care be exercised when diagnosing AEA

A Jus Post Bellum Analysis of Lethal Autonomous Weapons: Assessing the Importance of Human Interaction and Moral Repair to Peace

The future development of lethal autonomous weapons (LAWs) presents a significant shift in the way that war is conducted. The present debates surrounding the ethicality of implementing LAWs focus on a broad spectrum of concerns, yet currently fails to address the impact these weapons have on securing peace. As such, this paper rests within a jus post bellum framework, seeking to address how the implementation of LAWs affects the procurement of peace. This paper looks at the relational mechanisms of achieving peace, insofar as it is a product of human interaction and relational processes, and settles on two themes; the factors within war related to human action and interaction – collective experience, recognition of humanity, and the exhibition of mercy – and the factors after war related to moral repair –forgiveness, reconciliation, and truth telling. Through historical examples of human interaction, and a normative enquiry into the demands of repair, this paper finds that LAWs have a detrimental effect on the current methods of securing peace insofar as they are incapable of replicating avenues which humans currently participate in. As such, this paper highlights the trade-off between measures to prevent suffering and the necessity of moral repair, and contributes to the literature on jus post bellum more broadly by demonstrating the importance of repair post-conflict which has thus far been omitted

Integrating personality research and animal contest theory: aggressiveness in the green swordtail <i>Xiphophorus helleri</i>

&lt;p&gt;Aggression occurs when individuals compete over limiting resources. While theoretical studies have long placed a strong emphasis on context-specificity of aggression, there is increasing recognition that consistent behavioural differences exist among individuals, and that aggressiveness may be an important component of individual personality. Though empirical studies tend to focus on one aspect or the other, we suggest there is merit in modelling both within-and among-individual variation in agonistic behaviour simultaneously. Here, we demonstrate how this can be achieved using multivariate linear mixed effect models. Using data from repeated mirror trials and dyadic interactions of male green swordtails, &lt;i&gt;Xiphophorus helleri&lt;/i&gt;, we show repeatable components of (co)variation in a suite of agonistic behaviour that is broadly consistent with a major axis of variation in aggressiveness. We also show that observed focal behaviour is dependent on opponent effects, which can themselves be repeatable but were more generally found to be context specific. In particular, our models show that within-individual variation in agonistic behaviour is explained, at least in part, by the relative size of a live opponent as predicted by contest theory. Finally, we suggest several additional applications of the multivariate models demonstrated here. These include testing the recently queried functional equivalence of alternative experimental approaches, (e. g., mirror trials, dyadic interaction tests) for assaying individual aggressiveness.&lt;/p&gt

Field relations, structure, and geochemistry of the Fisset Brook Formation in the Lake Ainslie - Gillanders Mountain area, central Cape Breton Island, Nova Scotia

Detailed mapping shows that the Fisset Brook Formation in the Lake Ainslie - Gillanders Mountain area consists of a lowermost sedimentary unit overlain by basaltic and rhyolitic units. The sedimentary unit is mainly arkosic pebble conglomerate and siltstone, and unconformably overlies or is in faulted contact with older meta-morphic and plutonic rocks. Scattered gabbroic plutons and dykes in the sedimentary unit are interpreted to represent "feeders" to the overlying basaltic flows. The basaltic unit consists mainly of subaerial flows, locally interlayered and intermixed with red-brown siltstone. The overlying rhyolitic unit consists mainly of eutaxitic to spherulitic flows or welded tuffs, with less abundant lapilli tuff. In the Lake Ainslie area, these rocks occur in a north-south array of rhombic fault blocks, whereas in the Gillanders Mountain area, the dominant structure is a large-scale anticlinal fold closing toward the south, cored largely by rocks of the Fisset Brook Formation. The chemical compositions of the basalt and rhyolite in both areas have been modified by alteration, but discrimination diagrams using relatively immobile elements, including rare-earth elements, indicate that the basalts and gabbros are continental, within-plate tholeiites. The rhyolites also have features indicative of origin in a within-plate setting, but are depleted in Y, Zr, and rare-earth elements compared to A-type granites. A rhyolite sample yielded a U-Pb (zircon) age of 373 ± 4 Ma, thus indicating that the Fisset Brook Formation in the Lake Ainslie - Gillanders Mountain area is Middle to earliest Late Devonian in age, not Late Devonian to Early Carboniferous as previously inferred. R&#xC9;SUM&#xC9; Une cartographie detaill&#xE9;e montre que la Formation Fisset Brook dans le secteur du lac Ainslie et du mont Gillanders est constitut&#xE9;e d'une base s&#xE9;dimentaire recouverte d'unit&#xE9;s basaltique et rhyolitique. La base s&#xE9;dimentaire est principalement form&#xE9;e d'un conglomcrat de galets arkosiques et de siltstones; elle repose de fa&#xE7;on discordante ou par contact faill&#xE9; sur des roches m&#xE9;tamorphiques et plutoniques. Les dykes et les plutons gabbrotques dispers&#xE9;s dans l'unit&#xE9; s&#xE9;dimentaire sont interpr&#xE9;t&#xE9;s comme des syst&#xE8;mes d'alimentation &#xBB; des &#xE9;coulcments basaltiques sus-jacents. L'unit&#xE9; basaltique est principalement constitut&#xE9;e d'&#xE9;coulements sub&#xE9;criens, localement interstratifies et entremel&#xE9;s de siltstone brun rouge&#xE2;tre. L'unit&#xE9; rhyolitique sus-jacente est essentiellement compos&#xE9;e d'&#xE9;coulements eutaxiques &#xE0; sph&#xE9;rolitiqucs ou de tufs soud&#xE9;s, avec des conglom&#xE9;rats volcaniques &#xE0; lapilli dans une matrice fine moins abondants. Dans le secteur du lac Ainslie, ces roches se pr&#xE9;senters en une rang&#xE9;e nord-sud de blocs faill&#xE9;s rhombiques, tandis que dans le secteur du mont Gillanders, la structure dominante est un plissement anticlinal &#xE0; grande &#xE9;chelle qui se referme vers le sud et qui abrite en son cocur une quantit&#xE9; substantielle de roches de la Formation Fisset Brook. Les compositions chimiques du basalte et de la rhyolite des deux secteurs ont e&#xE9;t&#xE9; modifi&#xE9;es par alteration, mais des sch&#xE9;mas de discrimination utilisant des &#xE9;l&#xE9;ments relativement immobiles, dont des &#xE9;l&#xE9;ments de terres rarcs, r&#xE9;v&#xE8;lent que les basaltes et les gabbros sont des thol&#xE9;iites intra-plaque continentaux. Les rhyolites possedent en outre des caract&#xE9;ristiques qui t&#xE9;moignent qu'elles proviennent d'un cadre intra-plaque, mais elles sont pauvres en Y, en Zr et en &#xE9;l&#xE9;ments de terres rares comparativement aux granites de type A. Une datation au U-Pb (zircon) d'un &#xE9;chantillon de rhyolite lui a attribue un &#xE2;ge de 373 ± 4 Ma, ce qui r&#xE9;v&#xE8;le que la Formation Fisset Brook du secteur du lac Ainslie et du mont Gillanders remonte a la p&#xE9;riode du D&#xE9;vonien moyen au d&#xE9;but du D&#xE9;vonien sup&#xE9;rieur, et non &#xE0; celle du D&#xE9;vonien sup&#xE9;rieur au Carbonif&#xE8;re inf&#xE9;rieur comme on L'avait auparavant laisser entendre. [Traduit par la r&#xE9;daction