Glory revealed in disk-integrated photometry of Venus

Context. Reflected light from a spatially unresolved planet yields unique insight into the overall optical properties of the planet cover. Glories are optical phenomena caused by light that is backscattered within spherical droplets following a narrow distribution of sizes; they are well known on Earth as localised features above liquid clouds. Aims. Here we report the first evidence for a glory in the disk-integrated photometry of Venus and, in turn, of any planet. Methods. We used previously published phase curves of the planet that were reproduced over the full range of phase angles with model predictions based on a realistic description of the Venus atmosphere. We assumed that the optical properties of the planet as a whole can be described by a uniform and stable cloud cover, an assumption that agrees well with observational evidence. Results. We specifically show that the measured phase curves mimic the scattering properties of the Venus upper-cloud micron-sized aerosols, also at the small phase angles at which the glory occurs, and that the glory contrast is consistent with what is expected after multiple scattering of photons. In the optical, the planet appears to be brighter at phase angles of 11-13 deg than at full illumination; it undergoes a maximum dimming of up to 10 percent at phases in between. Conclusions. Glories might potentially indicate spherical droplets and, thus, extant liquid clouds in the atmospheres of exoplanets. A prospective detection will require exquisite photometry at the small planet-star separations of the glory phase angles.Comment: In press. Astronomy & Astrophysics. Letter to the Editor; 201

Multilayer hazes over Saturn’s hexagon from Cassini ISS limb images

Producción CientíficaVer abstract

Reconstrucción de la dinámica del sistema barrera-lagoon del Parque Nacional de las Islas Cíes a partir de su registro sedimentario

XV lnternational A.P.L.E. Symposium of Palynolog

Efecto de la incorporación de aceites esenciales de romero sobre la producción de leche de cabra y el crecimiento de los cabritos

Publishe

Remote Sensing Monitoring of a Coastal-Valley Earthflow in Northwestern Galicia, Spain

Historical air photographs, LiDAR, and an unmanned aerial vehicle (UAV) were used to record the movement, from 1956 to 2018, of a clay and clast earthflow in a coastal valley in northwestern Spain. Two procedures were employed. The first tracked changes, in a GIS environment, in the location of eight, easily identified objects on the surface of the deposit (large boulders, topographic lobes, and the foundations of an old hut). The second used DEMs of Difference (DoDs) based on Digital Elevation Models from a 2011 LiDAR flight and two UAV flights in 2016 and 2018 obtained by Structure from Motion-Photogrammetry techniques. While the first procedure provided estimates for earthflow movement over a 62-year period, the second produced more precise data for periods of up to 8-years. The first procedure indicated that the mean rate of movement was 0.48 m·yr−1, increasing from only 0.14 m·yr−1 from 1956 to 1983 to between 0.50 and 0.83 m·yr−1 from 1983 to 2018. Despite some temporal and spatial changes in direction, rates of surface movement were quite uniform on the deposit. The increase in earthflow movement after 1983 may be related to an increase in rainfall, although human activities associated with the removal of a wrecked ship from the nearshore may have been a contributing factor. The role of debuttressing due to the wave-induced removal of lateral support from the toe of the deposit is less clear. While there was no clear relationship between wave erosion and rates of movement, coastal retreat may have triggered changes in the direction and sediment flux in the toe of the deposit. This effect could have been tempered by negative feedback, however, whereby coastal erosion and increased flow activity were countered by the protection afforded by the accumulation of large, dislodged boulders on the beach. Because of this feedback, it is difficult to predict the impact of sea level rise and other elements of climate change along this coast.The first author is a beneficiary of the post-doctoral fellowship named Programa de ayudas de apoyo a la etapa inicial de formación posdoctoral (2017) founded by the Consellería de Cultura, Educación e Ordenación Universitaria de la Xunta de Galicia (Government of Galicia, Spain). The second author is a beneficiary of the pre-doctoral fellowship FPU 13/00168 founded by the Ministry of Education, Culture and Sport of Spain

Inquisición, poder y escritura femenina en tiempos del conde-duque de Olivares (1621-1643): el caso de Teresa Valle de la Cerda

This thesis examines the importance of women in political and cultural life at the Spanish court through the case of Teresa Valle, spiritual counsellor of Olivares, the favourite of King Philip IV (1621–1643). Scholars have assumed that women in Golden Age Spain played only a minor role in high Baroque politics and culture; my research demonstrates this to be a partial and insufficient view. Through an analysis of diverse primary sources such as letters, literary writings, and Inquisition records I show how relations between noblemen and religious women formed a key aspect of Baroque patronage and exchange, forming an essential tool of publicity and power for the former, and a way of access to the literary domain for the latter. Teresa Valle founded a convent in Madrid with the help of her patrons. The fame as visionary achieved by her aroused the wrath of some of the nuns of her convent, who denounce her to the Holy Office. She was condemned and the enemy factions of her powerful friends used the scandal to destruct their public image. In order to defence her honour and the moral integrity of her patrons Teresa addressed three treatises to the inquisitors and one confessional writing to the King. At the heart of the thesis there is a study of the writings that Teresa produced during this period, revealing her emerging literary identity, which I tried to elucidate and analyse. The nun´s trip into literature also allows me to define new paths of understanding female writing in Golden Age Spain and clarify the discursive strategies that religious women negotiated

Yellowtail Flounder Length at Maturity in the Grand Bank (1995-98)

In this paper yellowtail length at maturity estimates based data collected in the spring Spanish surveys in the Regulatory Area of Divisions 3NO are presented. Female length at 50 % maturity decreased from 35 cm in 1995 to 23 cm in 1998. In males, this parameter decreased from 23 cm in 1995 to 19 cm in 1998. The differences in L50 estimates in females were significant between 1997 and the previous years , and between 1998 and both 1996 and 1995, and were not significant between 1997 and 1998. In males, differences were significant between all the years, except between 1997 and 1998. The covariance analysis between the linearized maturity curves were highly significant in both sexes

Data on sharks in NAFO Divisions 3LMNO: 1991-1998

A review of the species composition, distribution and abundance of sharks in both the Spanish commercial catches (1991-98) and research surveys (1988-98) are carried out. Shark species are by-catches of Greenland halibut fishery. The proportion of shark species in the total catch is small and the main retained species is the black dogfish, whereas the main discard is the boreal shark. Since 1996 the retained proportion of black dogfish increase notably, as well as the proportion of total sharks. In the surveys this shark is the species with the highest biomass index. Black dogfish is found in the deepest waters. The length range of black dogfish is mainly between 50 and 80 cm, with a mode about 62-63 cm. No evident geographic pattern in the length distribution is observed during the studied period