Browsing by Subject "Earth-Surface Processes"
Now showing items 1-20 of 22
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(2007)In our study, we asked whether butterflies visiting Chaetanthera lycopodioides (Asteraceae) in the subnival at 3450 m a.s.l. in the central Andes prefer larger floral displays. To answer this question, we compared the ...
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(Copernicus GmbH, 2018)Vegetation is crucial for modulating rates of denudation and landscape evolution, as it stabilizes and protects hillslopes and intercepts rainfall. Climate conditions and the atmospheric CO2 concentration, hereafter [CO2], ...
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(Blackwell Publishing Ltd, 2008)Alfvén/ion-cyclotron waves have been observed in several regions of the magnetosphere. Parametric decays of finite amplitude Alfvén/ion- cyclotron waves in the presence of He+ ions and a mixed population of thermal and hot ...
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(1994)Alpaca play a primary role in the Andean peasant economy. Major constraints to productivity include lack of knowledge of relations between reproduction and nutrition and of the potential of alpaca outside their normal ...
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(2013)We present the first glacier inventory of the Monte San Lorenzo region (47 35'S, 72 18'W) in the southern Patagonian Andes of Chile and Argentina. This region contains the largest and easternmost glaciers at these latitudes ...
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(Blackwell Publishing Ltd, 2011)A method is developed for estimating F region ion composition from incoherent scatter radar (ISR) measurements during times of frictional ion heating. The technique addresses ion temperature-mass ambiguities in the IS ...
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(Blackwell Publishing Ltd, 2001)We study ion acoustic damping effects on parametric decays of right-hand-polarized electromagnetic waves. We do this because ion beams have been observed in a variety of space environments, and consequently, these waves ...
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(Blackwell Publishing Ltd, 2005)[1] It is shown that ion-acoustic waves propagating along an external magnetic field and generated by parametric decays of circularly polarized finite amplitude waves have the properties of ion-acoustic waves observed ...
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(1988)Late-glacial-Holocene forest history of southern Isla Chiloé (latitude 43°10′ S) was reconstructed on the basis of pollen analysis in three profiles (Laguna Soledad, Laguna Chaiguata, Puerto Carmen). Prior to 12,500 yr ...
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(Institute of Arctic and Alpine Research, 2017)© 2017 Regents of the University of Colorado. We tested the main hypothesis that nutrient accumulation during late stages of postglacial succession would decrease nutrient limitation of diazotrophic activity. We tested ...
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(Academic Press Inc., 1997)Twenty archaeological campsites intercalated between more than 30 debris flows caused by heavy rainfall events between 6200 and 3100 14C yr B.P. have recently been discovered at Quebrada Puripica in the Atacama Desert of ...
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(Pontificia Universidad Católica de Chile, 2011)Este artículo tiene como objetivo presentar el marco conceptual y metodológico en que se desarrollan las técnicas de modelos de distribución para especies y ecosistemas. Se hace una revisión ...
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(Blackwell Publishing Ltd, 2009)It is well known that nonlinear electrostatic instabilities can be triggered in a plasma with streaming ion species in the presence of finite-amplitude Alfvén cyclotron waves. The instability occurs when the phase velocity ...
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(Blackwell Publishing Ltd, 2007)The effects of a finite-amplitude Alfvén wave in a plasma system with a proton and an alpha-particle beam, are studied. The system is described by a fourteenth-order polynomial providing, thereby, many decay channels for ...
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(Blackwell Publishing Ltd, 2011)An electrostatic parallel particle-in-cell (EPPIC) code that allows for particle beam injections and multiple boundary conditions is used to investigate the beam-plasma interaction and its manifestations in the incoherent ...
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(Blackwell Publishing Ltd, 2000)The behavior of substorms as sudden transitions of the magnetosphere is studied using the Bargatze et al. [1985] data set of the solar wind induced electric field vBs and the auroral electrojet index AL. The data set is ...
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(2006)Low temperatures, short growing seasons, and strong winds, which constrain the abundance and activity of insect pollinators, characterize alpine ecosystems. In northern hemisphere alpine environments, the reproductive ...
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(Blackwell Publishing Ltd, 2016)©2016. American Geophysical Union. All Rights Reserved. The Unsolved Problems of Magnetospheric Physics Workshop was held in September 2015 in Scarborough, UK. In contrast to most other meetings, people were specifically ...
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(1994)Experiments were undertaken to obtain information on the effects of season on endocrine function and testicular morphology in male vicunña. Serial blood samples were taken every 15 min over 4-8 h in February and August: ...
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(Blackwell Publishing Ltd, 2000)Evidence is presented that suggests that there is a significant self-organized criticality (SOC) component in the dynamics of substorms in the magnetosphere. We assume that observations of bursty bulk flows, fast flows, ...