Inmaculada Menendez

Inmaculada Menendez
Universidad de Las Palmas de Gran Canaria | ULPGC · Department of Physics

About

42
Publications
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413
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Publications

Publications (42)
Conference Paper
Grain-size distributions and skeletal assemblages of surface sediments from the Amanay Seamount, El Banquete, and Conception Bank (Canary Islands) were combined to better understand the textural variability in carbonate microfacies of seamounts in temperate waters. Grain size was determined in half phi intervals by wet-sieving (< 63 μm) and dry-sie...
Article
Volcanic islands are unique settings to analyze the controls on calcrete development in settings with varied relief, climate and vegetation, and lacking carbonate host rocks. This paper discusses the formation of Quaternary calcrete profiles in Gran Canaria volcanic Island, under direct influence of the SAL (Saharian Air Layer). Calcrete profiles a...
Article
Las Canteras beach outcrops are vestiges of palaeoenvironments that represent changes in sea level and/or climate conditions. Using broad sedimentological, mineralogical, geochemical, and dating studies, three different palaeoenvironmental facies were distinguished. (1) The lower facies was defined as beachrock, formed by decametric calcarenite lay...
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Saharan dust events are currently the predominant source of lithogenic particles in the Canary Basin. In order to quantify this input and its relationship with the biogenic fluxes, a sediment trap was deployed in a free-drifting system at 150 m depth, 50 km off the north coast of Gran Canaria (Canary Islands). The mineralogy of the lithogenic parti...
Article
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Aeolian influx and related environmental conditions on Gran Canaria during the early Pleistocene – ERRATUM - Volume 91 Issue 1 - Inmaculada Menéndez, José Mangas, Esperança Tauler, Vidal Barrón, José Torrent, Juan F. Betancort, Ángelo Santana, José Manuel Recio, Luis A. Quevedo-González, Ignacio Alonso, Jorge Méndez-Ramos
Article
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The island of Gran Canaria is regularly affected by dust falls due to its proximity to the Saharan desert. Climatic oscillations may affect the Saharan dust input to the island. Geochemical, mineralogical, and textural analysis was performed on a well-developed and representative early Pleistocene paleosol to examine Saharan dust contribution to Gr...
Article
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La isla de La Graciosa está dentro del Parque Natural marítimo-terrestre del Archipiélago Chinijo y presenta varios ambientes sedimentarios arenosos, asociados a sistemas playa duna. El objetivo de esta investigación es determinar la composición de las arenas submareales, en el contexto de una investigación más amplia que pretende conocer las causa...
Article
Gran Canaria Island is frequently impacted by Saharan dust, a health hazard of particular concern to the island population and health agencies. Airborne mineral dust has the severest impact on the higher age groups of the population, and those with respiratory conditions; despite that, on average, the ambient particulate matter (PM) concentrations...
Article
This paper reports on sequential aerosol sample sets collected at the Campus de Tafira, University of Las Palmas de Gran Canaria (ULPGC), in 2010. Gran Canaria is located approximately 250 km off the coast of North Africa and at the northern margin of the dominant Saharan dust plumes being blown westward across the Atlantic Ocean. PM2.5 aerosol sam...
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Aeolian dust plays an important role in climate and ocean processes. Particularly, Saharan dust deposition is of importance in the Canary Current due to its content of iron minerals, which are fertilizers of the ocean. In this work, dust particles are characterized mainly by granulometry, morphometry and mineralogy, using image processing and scann...
Chapter
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The Canary Islands are located on the western dominant transport path of atmospheric dust plumes generated in the Saharan desert. The Saharan region is widely regarded as the world´s greatest source of natural mineral dust, much of which is delivered to the ocean and, from time to time, reaches Southern Europe and the Americas. The fact that the Ca...
Article
The island of Gran Canaria is located in the eastern Atlantic, to the west of the Saharan Desert, and, as a result of its proximity, is regularly affected by Saharan dust. When this weather condition occurs (haze conditions) the particulate/aerosol accumulation rate was lightly higher than under non-haze conditions (5.4±3.8 mg m−2 h−1 versus 4.3±2....
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Three techniques for obtaining soil water solutions (gravitational and matrical waters extracted using both in situ tension lysimeters and in vitro pressure chambers) and their later chemical analysis were performed in order to know the evolution of the soil-solution composition when water moves down through the soil, from the Ah soil horizon to th...
Conference Paper
Full-text available
Three techniques for obtaining soil water (gravitational waters, with zero-tension lysimeters, and matricial waters extracted with both, in situ tension lysimeters and in vitro pressure chambers) were used to determine the chemical evolution of gravitational and matricial waters, from the Ah and the BwC or C soil horizons. The study was carried out...
Article
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Two-dimensional image analysis of soil porosity has been used to study four forest plots. The analysis yields the number n(a) of soil pores having greater area than a, and the number n(p) of pores having larger perimeters than p. Both distributions follow power-laws of the form n(a)∼a−Da and n(p)∼p−Dp, with different exponents in two scaling regime...
Article
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A study was conducted to assess the properties of a tension porous-ceramic cup soil-solution sampler and its usefulness in extracting soil solutions in selected forest soils (haplic Umbrisols) at “Sierra De Gata” Mountains, CW-Spain. The main characteristics of the sampler evaluated were hydraulic conductivity, the time required to obtain the soil-...
Article
Full-text available
Two techniques for obtaining soil solution (extracted with tension and zero tension lysimeters) were used for determining the different composition of gravitational and matrixial waters. Matrixial waters had high higher values in Na+, Mn2+, Fe3+, Zn2+, and Si(OH)n in relation to gravitational waters, reflecting the soil conditions and mineral equil...
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Nutrient ion concentrations in soil water were assessed in three deciduous forests in the Sierra de Cata Mountains, central‐western Spain, with annual precipitation ranging between 720 and 1,580 mm. Soil solutions were obtained at incremental depths from 15 to 110 cm with tension lysimeters and analyzed for pH, electrolytic conductivity (EC), disso...
Article
Full-text available
Soil solution composition in Forest soils of ‘Sierra de Gata’ Mountains, Central-Western Spain: Relationship with soil water content Nutrient ion concentration in soil water were assessed in three deciduous forest the ‘Sierra de Gata’ Mountains, Central-Western Spain, with annual precipitation ranging from 720 to 1,580 mm a-1. Soil solution were o...
Article
Full-text available
MENENDEZ I., G. MORENO, J.F. GALLARDO y J. SAAVEDRA: "Soil solution composition in forest soils of 'Sierra de Gata' mountains: Relationship with soil water content". Arid Soil Res. & Rehabil., 9: 495-502 (1995). A study of soil nutrients in three plots of deciduous species from the “Sierra de Gata” Mountains (Western Spain) was performed. The soil...
Article
A study was conducted to assess the properties of a tension porous-ceramic cup soil-solution sampler and its usefulness in extncting soil solutions in selected forest soils (haplic Umbrisols) at "Sierra De Gata'' Mountains, CW-Spain. The main characteristics of the sampler evaluated were hydraulic c&ductivity, the time requircd to obtain the soil-w...

Projects

Projects (2)