Atmospheric monitoring with a new GNSS network in the south-central Andes

2021 ◽  
Author(s):  
Nikolaos Antonoglou ◽  
Kyriakos Balidakis ◽  
Bodo Bookhagen ◽  
Galina Dick ◽  
Florian Zus ◽  
...  
Keyword(s):  
Research Training ◽  
Training Group ◽  
Satellite System ◽  
Central Andes ◽  
Temporal Variations ◽  
Mountain Range ◽  
Spatial Correlations ◽  
The South ◽  
Climate Conditions ◽  
South Central

<p>The Central Andes are characterized by a steep climatic and environmental gradient with large spatial and temporal variations of associated hydrological parameters. There are two main atmospheric processes that influence climate conditions in our study area in northwestern Argentina: the South American Monsoon System that transports moisture via the low-level jet and the orographic barrier of the Eastern Cordillera that forces focused rainfall at the windward facing slopes.<br>As part of the International Research Training Group-StRATEGy project, our research aims at monitoring integrated water vapour (IWV) in the south-central Andes, in order to track moisture propagation. In accordance with the needs of the research, we processed data from two new Global Navigation Satellite System (GNSS) ground stations that were installed in spring 2019 along with - already calculated - solutions that were derived from an existing network. We used 10 year-long time-series from 31 stations spanning an altitude range from 198 to 5141m asl and stretching from the mountain front to the interior of the mountain range. This enhanced network helped us to examine spatial correlations, as well as differences in behaviour of the IWV across the climatic gradient. Moreover, we retrieved the gradients of the IWV at single positions, in order to study seasonal correlations between wind and gradient direction.</p>

Exploring habitat diversity of mid-holocene hunter-gatherers in the South-Central Andes: Multi-proxy analysis of Cruces Core 1 (TC1), Dry Puna of Jujuy, Argentina

2018 ◽  
Vol 18 ◽  
pp. 708-721 ◽  
Author(s):  
Marcelo R. Morales ◽  
Sabrina Bustos ◽  
Brenda I. Oxman ◽  
Malena Pirola ◽  
Pablo Tchilinguirian ◽  
...  
Keyword(s):  
Habitat Diversity ◽  
Central Andes ◽  
The South ◽  
Hunter Gatherers ◽  
South Central

scholarly journals INTERACTUEMOS NOSOTROS TAMBIÉN A PANORAMA OF CERAMIC RESEARCH FROM THE SOUTH-CENTRAL ANDES

2015 ◽  
Vol 47 (3) ◽  
pp. 347-352
Author(s):  
Emily Stovel ◽  
María Beatriz Cremonte ◽  
Vivien G Standen
Keyword(s):  
Central Andes ◽  
The South ◽  
South Central

Yavi-Chicha and the Inka expansion: a petrographic approach

Antiquity ◽  
2014 ◽  
Vol 88 (342) ◽  
pp. 1261-1274 ◽  
Author(s):  
María Beatriz Cremonte
Keyword(s):  
Material Culture ◽  
Everyday Life ◽  
Central Andes ◽  
Archaeological Sites ◽  
Petrographic Analysis ◽  
The South ◽  
Local Identities ◽  
South Central ◽  
Production Processes ◽  
The Social

The social complexities underlying imperial control are manifest in the material culture of everyday life encountered at archaeological sites. The Yavi-Chicha pottery style of the south-central Andes illustrates how local identities continued to be expressed in practices of pottery manufacture during the process of Inka expansion. The Yavi-Chicha style itself masks a number of distinct production processes that can be traced through petrographic analysis and that relate to the different communities by whom it was produced and consumed. The dispersion of pottery fabric types in this region may partly be attributable to the Inka practice of mitmaqkuna, the displacement and relocation of entire subject populations.

Evolution of Large Bedrock Landslides in the South-Central Andes of NW Argentina 

2021 ◽  
Author(s):  
Mohammad M.Aref ◽  
Bodo Bookhagen ◽  
Manfred R. Strecker
Keyword(s):  
Driving Forces ◽  
Central Andes ◽  
Anthropogenic Sources ◽  
High Temporal Resolution ◽  
Electron Content ◽  
Infrastructure Development ◽  
The South ◽  
Total Electron ◽  
Groundwater Levels ◽  
South Central

<p>Deep-seated, slow moving bedrock landslides are significant natural disasters with severe socio-economic repercussions. During the past decades, an acceleration of these hazards has been reported globally due to changes in seasonal freeze-thaw cycles, permafrost thawing, infrastructure development and other anthropogenic sources, changes of precipitation and groundwater levels, and variation in seismic activity. Interferometric Synthetic Aperture Radar(InSAR) is a powerful tool to map landslides movement from space and the Sentinel 1 C-band radar mission provides a high temporal resolution data source to investigate seasonal and intra-annual changes of landslide behaviour.</p><p>To construct a 2D/3D displacement field, we decompose a combination of different look angles and InSAR ascending and descending tracks of different sensors including Sentinel and ALOS 1 PALSAR data. The ionospheric delay for InSAR observations is estimated with a split range-spectrum technique because significant ionospheric total electron content variation is common in our study area in the Central Andes. Both statistical phase-based and weather model estimation approaches are implemented to minimize the effect of tropospheric signal on InSAR observations.</p><p>Our observations identify several areas with rapid translational slide movements exceeding 5-10 cm/y. Multi-annual and inter-annual behaviour of deformation is extracted through time series analysis and a hierarchical clustering approach is used to identify geographic areas with similar characteristics and rates. We show the wide-spread spatial distribution of unstable hill slopes in the Eastern Cordillera of the south-central Andes, especially at high elevations where field observations are difficult. We identify driving forces to be a combination of pre-existing geologic structures and climatic parameters.</p>

A Past as a Place

2019 ◽  
pp. 271-301
Keyword(s):  
Case Studies ◽  
Central Andes ◽  
Fractal Model ◽  
Archaeological Research ◽  
The South ◽  
The Past ◽  
South Central ◽  
Specific Material ◽  
Ontological Framework

The existence of a situational concept indissolubly spatial and temporal in the Bolivian altiplano, better defined by the aymara term pacha, in the south-central Andes is well sustained by ethno-historic and ethnographic accounts. However, the implications of this concept for archaeological research have not been considered enough. Is especially suggestive that, the past being necessarily a place, humans may have conceived various ways to physically interact with their pasts through ceremonialism. This chapter considers the implication of this idea within a framework of archaeology of time, applying a fractal model of the pacha concept in its various nested scales. In order to illustrate the material forms that the idea of relating with the entities of a “place of the past” can adopt, this chapter discusses three case-studies along a historic sequence. The chapter finishes with some thoughts about the specific material conducts that can be adopted, even within the same ontological framework.

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