Use of WRF-Hydro over the Northeast of the US to Estimate Water Budget Tendencies in Small Watersheds

In the Northeast of the US, climate change will bring a series of impacts on the terrestrial hydrology. Observations indicate that temperature has steadily increased during the last century, including changes in precipitation. This study implements the Weather Research and Forecasting (WRF)-Hydro framework with the Noah-Multiparameterization (Noah-MP) model that is currently used in the National Water Model to estimate the tendencies of the different variables that compounded the water budget in the Northeast of the US from 1980 to 2016. We use North American Land Data Assimilation System-2 (NLDAS-2) climate data as forcing, and we calibrated the model using 192 US Geological Survey (USGS) Geospatial Attributes of Gages for Evaluating Streamflow II (Gages II) reference stations. We study the tendencies determining the Kendall-Theil slope of streamflow using the maximum three-day average, seven-day minimum flow, and the monotonic five-day mean times series. For the water budget, we determine the Kendall-Theil slope for changes in monthly values of precipitation, surface and subsurface runoff, evapotranspiration, transpiration, soil moisture, and snow accumulation. The results indicate that the changes in precipitation are not being distributed evenly in the components of the water budget. Precipitation is decreasing during winter and increasing during the summer, with the direct impacts being a decrease in snow accumulation and an increase in evapotranspiration. The soil tends to be drier, which does not translate to a rise in infiltration since the surface runoff aggregated tendencies are positive, and the underground runoff aggregated tendencies are negative. The effects of climate change on streamflows are buffered by larger areas, indicating that more attention needs to be given to small catchments to adapt to climate change

Ingreso ocupacional : nivel y evolución en el Gran San Juan y Gran Mendoza 2003-2015

En el marco político económico de la división del trabajo, en los espacios supranacionales, nacionales, regionales y locales, la acumulación de capital ha sido considerada como cimiento del modelo económico de un país-sociedad. En efecto, es la condición estructural mediante la cual es posible observar el crecimiento de la economía. Particularmente en el contexto latinoamericano, sus países y al interior de ellos —regiones y/o aglomerados urbanos—, como es el caso bajo estudio. El mantenimiento del equilibrio social en el reparto de los excedentes permite que ese crecimiento, neutralice los conflictos propios o no que cada sector de poder desarrolla, en procura y afianzamiento de la cuota de participación en la sociedad. Teniendo en cuenta las consideraciones expresadas es menester concentrar la atención en los resultados que, hasta el momento, la política asumida tuvo sobre la Concentración-Distribución del Ingreso, disponible por parte de los perceptores individuales y de los hogares-familias para asegurar su subsistencia, propósito que se emprende en el trabajo. Una aspiración consecuente procurará medir la capacidad de subsistencia de los hogares-familias-personas, problemática fundamental a los fines del análisis y monitoreo de las políticas económicas. Finalidad que permitirá conocer el nivel y estructura de los recursos con los que cuentan para su desenvolvimiento las familias residentes en los aglomerados. Situación de interés, subsiguiente a los procesos de acentuación de desigualdad advertida desde la década del 70 hasta fines del siglo pasado y, en particular, a partir del punto máximo de crisis (implosión social) 2000-2001 e inflexión durante los años posteriores y hasta la actualidad.Fil: Valenzuela, Sara Mabel . Universidad Nacional de San Juan. Instituto de Investigaciones Socieconómicas.Fil: Favieri, Francisco N. . Universidad Nacional de San Juan. Instituto de Investigaciones Socieconómicas

Possible ring material around centaur (2060) Chiron

We propose that several short duration events observed in past stellar occultations by Chiron were produced by rings material. From a reanalysis of the stellar occultation data in the literature we determined two possible orientations of the pole of Chiron's rings, with ecliptic coordinates l=(352+/-10) deg, b=(37+/-10) deg or l=(144+/-10) deg, b=(24+/-10) deg . The mean radius of the rings is (324 +/- 10) km. One can use the rotational lightcurve amplitude of Chiron at different epochs to distinguish between the two solutions for the pole. Both imply lower lightcurve amplitude in 2013 than in 1988, when the rotational lightcurve was first determined. We derived Chiron's rotational lightcurve in 2013 from observations at the 1.23-m CAHA telescope and indeed its amplitude is smaller than in 1988. We also present a rotational lightcurve in 2000 from images taken at CASLEO 2.15-m telescope that is consistent with our predictions. Out of the two poles the l=(144+/-10) deg, b=(24+/-10) deg solution provides a better match to a compilation of rotational lightcurve amplitudes from the literature and those presented here. We also show that using this preferred pole, Chiron's long term brightness variations are compatible with a simple model that incorporates the changing brightness of the rings as the tilt angle with respect to the Earth changes with time. Also, the variability of the water ice band in Chiron's spectra in the literature can be explained to a large degree by an icy ring system whose tilt angle changes with time and whose composition includes water ice, analogously to the case of Chariklo. We present several possible formation scenarios for the rings from qualitative points of view and speculate on the reasons why rings might be common in centaurs. We speculate on whether the known bimodal color distribution of centaurs could be due to presence of rings and lack of them

The Lesser Known Challenge of Climate Change: Thermal Variance and Sex-Reversal in Vertebrates with Temperature-Dependent Sex Determination

Climate change is expected to disrupt biological systems. Particularly susceptible are species with temperature-dependent sex determination (TSD), as in many reptiles. While the potentially devastating effect of rising mean temperatures on sex ratios in TSD species is appreciated, the consequences of increased thermal variance predicted to accompany climate change remain obscure. Surprisingly, no study has tested if the effect of thermal variance around high-temperatures (which are particularly relevant given climate change predictions) has the same or opposite effects as around lower temperatures. Here we show that sex ratios of the painted turtle (Chrysemys picta) were reversed as fluctuations increased around low and high unisexual mean-temperatures. Unexpectedly, the developmental and sexual responses around female-producing temperatures were decoupled in a more complex manner than around male-producing values. Our novel observations are not fully explained by existing ecological models of development and sex determination, and provide strong evidence that thermal fluctuations are critical for shaping the biological outcomes of climate change

Ingreso ocupacional : nivel y evolución en el Gran San Juan y Gran Mendoza 2003-2015

En el marco político económico de la división del trabajo, en los espacios supranacionales, nacionales, regionales y locales, la acumulación de capital ha sido considerada como cimiento del modelo económico de un país-sociedad. En efecto, es la condición estructural mediante la cual es posible observar el crecimiento de la economía. Particularmente en el contexto latinoamericano, sus países y al interior de ellos —regiones y/o aglomerados urbanos—, como es el caso bajo estudio. El mantenimiento del equilibrio social en el reparto de los excedentes permite que ese crecimiento, neutralice los conflictos propios o no que cada sector de poder desarrolla, en procura y afianzamiento de la cuota de participación en la sociedad. Teniendo en cuenta las consideraciones expresadas es menester concentrar la atención en los resultados que, hasta el momento, la política asumida tuvo sobre la Concentración-Distribución del Ingreso, disponible por parte de los perceptores individuales y de los hogares-familias para asegurar su subsistencia, propósito que se emprende en el trabajo. Una aspiración consecuente procurará medir la capacidad de subsistencia de los hogares-familias-personas, problemática fundamental a los fines del análisis y monitoreo de las políticas económicas. Finalidad que permitirá conocer el nivel y estructura de los recursos con los que cuentan para su desenvolvimiento las familias residentes en los aglomerados. Situación de interés, subsiguiente a los procesos de acentuación de desigualdad advertida desde la década del 70 hasta fines del siglo pasado y, en particular, a partir del punto máximo de crisis (implosión social) 2000-2001 e inflexión durante los años posteriores y hasta la actualidad.Fil: Valenzuela, Sara Mabel . Universidad Nacional de San Juan. Instituto de Investigaciones Socieconómicas.Fil: Favieri, Francisco N. . Universidad Nacional de San Juan. Instituto de Investigaciones Socieconómicas

On stratification for spaces with Noetherian mod pp cohomology

Let $X$ be a topological space with Noetherian mod $p$ cohomology and let $C^*(X;\mathbb{F}_p)$ be the commutative ring spectrum of $\mathbb{F}_p$-valued cochains on $X$. The goal of this paper is to exhibit conditions under which the category of module spectra on $C^*(X;\mathbb{F}_p)$ is stratified in the sense of Benson, Iyengar, Krause, providing a classification of all its localizing subcategories. We establish stratification in this sense for classifying spaces of a large class of topological groups including Kac--Moody groups as well as whenever $X$ admits an $H$-space structure. More generally, using Lannes' theory we prove that stratification for $X$ is equivalent to a condition that generalizes Chouinard's theorem for finite groups. In particular, this relates the generalized telescope conjecture in this setting to a question in unstable homotopy theory