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The High‐Lakes Project

Identifieur interne : 007D56 ( Main/Exploration ); précédent : 007D55; suivant : 007D57

The High‐Lakes Project

Auteurs : Nathalie A. Cabrol [États-Unis] ; Edmond A. Grin [États-Unis] ; Guillermo Chong [Chili] ; Edwin Minkley [États-Unis] ; Andrew N. Hock [États-Unis] ; Youngseob Yu [États-Unis] ; Leslie Bebout [États-Unis] ; Erich Fleming [États-Unis] ; Donat P. H Der [Allemagne] ; Cecilia Demergasso [Chili] ; John Gibson [Australie] ; Lorena Escudero [Chili] ; Cristina Dorador [Chili] ; Darlene Lim [États-Unis] ; Clayton Woosley [États-Unis] ; Robert L. Morris [États-Unis] ; Cristian Tambley [Chili] ; Victor Gaete [Chili] ; Matthieu E. Galvez [France] ; Eric Smith [États-Unis] ; Ingrid Uskin-Peate [États-Unis] ; Carlos Salazar [Chili] ; G. Dawidowicz [France] ; J. Majerowicz [France]

Source :

RBID : ISTEX:F41B5E77CBB1BE5689CE83F45A762F8BAB6803FB

Descripteurs français

English descriptors

Abstract

The High Lakes Project is a multidisciplinary astrobiological investigation studying high‐altitude lakes between 4200 m and 6000 m elevation in the Central Andes of Bolivia and Chile. Its primary objective is to understand the impact of increased environmental stress on the modification of lake habitability potential during rapid climate change as an analogy to early Mars. Their unique geophysical environment and mostly uncharted ecosystems have added new objectives to the project, including the assessment of the impact of low‐ozone/high solar irradiance in nonpolar aquatic environments, the documentation of poorly known ecosystems, and the quantification of the impact of climate change on lake environment and ecosystem. Data from 2003 to 2007 show that UV flux is 165% that of sea level with maximum averaged UVB reaching 4 W/m2. Short UV wavelengths (260–270 nm) were recorded and peaked at 14.6 mW/m2. High solar irradiance occurs in an atmosphere permanently depleted in ozone falling below ozone hole definition for 33–36 days and between 30 and 35% depletion the rest of the year. The impact of strong UVB and UV erythemally weighted daily dose on life is compounded by broad daily temperature variations with sudden and sharp fluctuations. Lake habitat chemistry is highly dynamical with notable changes in yearly ion concentrations and pH resulting from low and variable yearly precipitation. The year‐round combination of environmental variables define these lakes as end‐members. In such an environment, they host ecosystems that include a significant fraction of previously undescribed species of zooplankton, cyanobacterial, and bacterial populations.

Url:
DOI: 10.1029/2008JG000818


Affiliations:


Links toward previous steps (curation, corpus...)


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<term>Geophysical</term>
<term>Geophysical environment</term>
<term>Geoscience department</term>
<term>Global warming</term>
<term>Habitability</term>
<term>Habitat sustainability</term>
<term>High altitude lakes</term>
<term>High lakes</term>
<term>High lakes project</term>
<term>High ratio</term>
<term>Highaltitude lakes</term>
<term>Hock</term>
<term>Hydrothermal springs</term>
<term>Information services center</term>
<term>Inverse relationships</term>
<term>Iowa city</term>
<term>Irradiance</term>
<term>Laguna</term>
<term>Laguna blanca</term>
<term>Laguna verde</term>
<term>Lake environment</term>
<term>Lake sediment</term>
<term>Lascar</term>
<term>Licancabur</term>
<term>Licancabur area</term>
<term>Licancabur lake</term>
<term>Licancabur samples</term>
<term>Licancabur summit lake</term>
<term>Licancabur volcano</term>
<term>Lunar planet</term>
<term>Many others</term>
<term>Marine research laboratories</term>
<term>Maximum erythemally</term>
<term>Maximum peak volume</term>
<term>Meridiani planum</term>
<term>Meteorological station</term>
<term>Microbial</term>
<term>Microbial communities</term>
<term>Microbial diversity</term>
<term>Moffett field</term>
<term>Mono lake</term>
<term>Mountain view</term>
<term>Narrow range</term>
<term>Nasa</term>
<term>Nasa ames research center</term>
<term>Nasa gsfc</term>
<term>Northern chile</term>
<term>November</term>
<term>Organic carbon</term>
<term>Other lakes</term>
<term>Ozone</term>
<term>Ozone concentration</term>
<term>Ozone fluctuation</term>
<term>Ozone hole</term>
<term>Ozone hole definition</term>
<term>Ozone hole events</term>
<term>Pacific ocean</term>
<term>Permanent ozone depletion</term>
<term>Point measurements</term>
<term>Polar environments</term>
<term>Precipitation</term>
<term>Preliminary assessment</term>
<term>Preliminary results</term>
<term>Previous studies</term>
<term>Project figure</term>
<term>Punta arenas</term>
<term>Radiative cloud fraction</term>
<term>Rapid climate change</term>
<term>Regional context</term>
<term>Relative humidity</term>
<term>Risacher</term>
<term>Rother research station</term>
<term>Rrna gene sequences</term>
<term>Salar</term>
<term>Same gradients</term>
<term>Same period</term>
<term>Same species</term>
<term>Santiago</term>
<term>Sediment</term>
<term>Sediment samples</term>
<term>Seti carl sagan center</term>
<term>Shallow waters</term>
<term>Significant fraction</term>
<term>Simba</term>
<term>Solar irradiance</term>
<term>Space science</term>
<term>Space sciences</term>
<term>Spie conf</term>
<term>Stratigraphic record</term>
<term>Study sites</term>
<term>Summer solstice</term>
<term>Summit crater</term>
<term>Surface water temperature</term>
<term>Tasmanian aquaculture</term>
<term>Taxonomic details</term>
<term>Tecnologica para santiago</term>
<term>Ultraviolet radiation</term>
<term>Uncharted ecosystems</term>
<term>Undescribed species</term>
<term>Unique geophysical environment</term>
<term>Univ</term>
<term>Universidad catolica</term>
<term>Verde</term>
<term>Volcano</term>
<term>Water balance</term>
<term>Water chemistry</term>
<term>Water column</term>
<term>Water column depth</term>
<term>Water depth</term>
<term>Water level</term>
<term>Wetter years</term>
<term>Williamson</term>
<term>Wind direction</term>
<term>Winter weather systems</term>
<term>Yearly precipitation</term>
<term>Zooplankton</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en">
<term>Aecc</term>
<term>Agua</term>
<term>Aguas calientes</term>
<term>Altiplanic</term>
<term>Altiplanic winter</term>
<term>Altiplano</term>
<term>Analog</term>
<term>Andes</term>
<term>Antarctic</term>
<term>Antarctic ozone hole</term>
<term>Antarctica</term>
<term>Antofagasta</term>
<term>Aquatic</term>
<term>Aquatic habitat</term>
<term>Aquatic life</term>
<term>Aquatic organisms</term>
<term>Astrobiology division</term>
<term>Atacama</term>
<term>Atacama desert</term>
<term>Austral spring</term>
<term>Austral summer</term>
<term>Avenida angamos</term>
<term>Bacterial communities</term>
<term>Bacterial composition</term>
<term>Bacterial populations</term>
<term>Bathymetric unit</term>
<term>Biological sciences</term>
<term>Biological sciences division</term>
<term>Blanca</term>
<term>Bolivia</term>
<term>British antarctic survey</term>
<term>Cabrol</term>
<term>Calientes</term>
<term>Cambridge univ</term>
<term>Carnegie mellon university</term>
<term>Carta geologica</term>
<term>Cell resolution</term>
<term>Central andes</term>
<term>Chile</term>
<term>Chilean altiplano</term>
<term>Climate change</term>
<term>Clone</term>
<term>Crater</term>
<term>Cyanobacteria</term>
<term>Cyanobacterial</term>
<term>Daily dose</term>
<term>Daily doses</term>
<term>Daily ozone concentration</term>
<term>Department botanik</term>
<term>Dgge bands</term>
<term>Diffuse attenuation coefficient</term>
<term>Discoverer ketty lund exploration vessel</term>
<term>Diverse ecosystems</term>
<term>Dorador</term>
<term>Dosimeter</term>
<term>Earth planet</term>
<term>Ecole normale superieure</term>
<term>Ecosystem</term>
<term>Eldonet</term>
<term>Environmental cycles</term>
<term>Environmental engineering</term>
<term>Environmental factors</term>
<term>Environmental stress</term>
<term>Environmental variables</term>
<term>Field campaign</term>
<term>Field campaigns</term>
<term>First bathymetric</term>
<term>Fisheries institute</term>
<term>Fluctuation</term>
<term>Fossil microbialites</term>
<term>Geophys</term>
<term>Geophysical</term>
<term>Geophysical environment</term>
<term>Geoscience department</term>
<term>Global warming</term>
<term>Habitability</term>
<term>Habitat sustainability</term>
<term>High altitude lakes</term>
<term>High lakes</term>
<term>High lakes project</term>
<term>High ratio</term>
<term>Highaltitude lakes</term>
<term>Hock</term>
<term>Hydrothermal springs</term>
<term>Information services center</term>
<term>Inverse relationships</term>
<term>Iowa city</term>
<term>Irradiance</term>
<term>Laguna</term>
<term>Laguna blanca</term>
<term>Laguna verde</term>
<term>Lake environment</term>
<term>Lake sediment</term>
<term>Lascar</term>
<term>Licancabur</term>
<term>Licancabur area</term>
<term>Licancabur lake</term>
<term>Licancabur samples</term>
<term>Licancabur summit lake</term>
<term>Licancabur volcano</term>
<term>Lunar planet</term>
<term>Many others</term>
<term>Marine research laboratories</term>
<term>Maximum erythemally</term>
<term>Maximum peak volume</term>
<term>Meridiani planum</term>
<term>Meteorological station</term>
<term>Microbial</term>
<term>Microbial communities</term>
<term>Microbial diversity</term>
<term>Moffett field</term>
<term>Mono lake</term>
<term>Mountain view</term>
<term>Narrow range</term>
<term>Nasa</term>
<term>Nasa ames research center</term>
<term>Nasa gsfc</term>
<term>Northern chile</term>
<term>November</term>
<term>Organic carbon</term>
<term>Other lakes</term>
<term>Ozone</term>
<term>Ozone concentration</term>
<term>Ozone fluctuation</term>
<term>Ozone hole</term>
<term>Ozone hole definition</term>
<term>Ozone hole events</term>
<term>Pacific ocean</term>
<term>Permanent ozone depletion</term>
<term>Point measurements</term>
<term>Polar environments</term>
<term>Precipitation</term>
<term>Preliminary assessment</term>
<term>Preliminary results</term>
<term>Previous studies</term>
<term>Project figure</term>
<term>Punta arenas</term>
<term>Radiative cloud fraction</term>
<term>Rapid climate change</term>
<term>Regional context</term>
<term>Relative humidity</term>
<term>Risacher</term>
<term>Rother research station</term>
<term>Rrna gene sequences</term>
<term>Salar</term>
<term>Same gradients</term>
<term>Same period</term>
<term>Same species</term>
<term>Santiago</term>
<term>Sediment</term>
<term>Sediment samples</term>
<term>Seti carl sagan center</term>
<term>Shallow waters</term>
<term>Significant fraction</term>
<term>Simba</term>
<term>Solar irradiance</term>
<term>Space science</term>
<term>Space sciences</term>
<term>Spie conf</term>
<term>Stratigraphic record</term>
<term>Study sites</term>
<term>Summer solstice</term>
<term>Summit crater</term>
<term>Surface water temperature</term>
<term>Tasmanian aquaculture</term>
<term>Taxonomic details</term>
<term>Tecnologica para santiago</term>
<term>Ultraviolet radiation</term>
<term>Uncharted ecosystems</term>
<term>Undescribed species</term>
<term>Unique geophysical environment</term>
<term>Univ</term>
<term>Universidad catolica</term>
<term>Verde</term>
<term>Volcano</term>
<term>Water balance</term>
<term>Water chemistry</term>
<term>Water column</term>
<term>Water column depth</term>
<term>Water depth</term>
<term>Water level</term>
<term>Wetter years</term>
<term>Williamson</term>
<term>Wind direction</term>
<term>Winter weather systems</term>
<term>Yearly precipitation</term>
<term>Zooplankton</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr">
<term>Chili</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Antarctique</term>
<term>Bolivie</term>
<term>Changement climatique</term>
<term>écosystème</term>
<term>Milieu géophysique</term>
<term>Réchauffement climatique</term>
<term>Ozone</term>
<term>Science de l'espace</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract">The High Lakes Project is a multidisciplinary astrobiological investigation studying high‐altitude lakes between 4200 m and 6000 m elevation in the Central Andes of Bolivia and Chile. Its primary objective is to understand the impact of increased environmental stress on the modification of lake habitability potential during rapid climate change as an analogy to early Mars. Their unique geophysical environment and mostly uncharted ecosystems have added new objectives to the project, including the assessment of the impact of low‐ozone/high solar irradiance in nonpolar aquatic environments, the documentation of poorly known ecosystems, and the quantification of the impact of climate change on lake environment and ecosystem. Data from 2003 to 2007 show that UV flux is 165% that of sea level with maximum averaged UVB reaching 4 W/m2. Short UV wavelengths (260–270 nm) were recorded and peaked at 14.6 mW/m2. High solar irradiance occurs in an atmosphere permanently depleted in ozone falling below ozone hole definition for 33–36 days and between 30 and 35% depletion the rest of the year. The impact of strong UVB and UV erythemally weighted daily dose on life is compounded by broad daily temperature variations with sudden and sharp fluctuations. Lake habitat chemistry is highly dynamical with notable changes in yearly ion concentrations and pH resulting from low and variable yearly precipitation. The year‐round combination of environmental variables define these lakes as end‐members. In such an environment, they host ecosystems that include a significant fraction of previously undescribed species of zooplankton, cyanobacterial, and bacterial populations.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Allemagne</li>
<li>Australie</li>
<li>Chili</li>
<li>France</li>
<li>États-Unis</li>
</country>
<region>
<li>Bavière</li>
<li>Californie</li>
<li>District de Moyenne-Franconie</li>
<li>Iowa</li>
<li>Pennsylvanie</li>
<li>Île-de-France</li>
</region>
<settlement>
<li>Erlangen</li>
<li>Iowa City</li>
<li>Los Angeles</li>
<li>Paris</li>
<li>Pittsburgh</li>
</settlement>
<orgName>
<li>Université Carnegie-Mellon</li>
<li>Université de l'Iowa</li>
</orgName>
</list>
<tree>
<country name="États-Unis">
<region name="Californie">
<name sortKey="Cabrol, Nathalie A" sort="Cabrol, Nathalie A" uniqKey="Cabrol N" first="Nathalie A." last="Cabrol">Nathalie A. Cabrol</name>
</region>
<name sortKey="Bebout, Leslie" sort="Bebout, Leslie" uniqKey="Bebout L" first="Leslie" last="Bebout">Leslie Bebout</name>
<name sortKey="Cabrol, Nathalie A" sort="Cabrol, Nathalie A" uniqKey="Cabrol N" first="Nathalie A." last="Cabrol">Nathalie A. Cabrol</name>
<name sortKey="Fleming, Erich" sort="Fleming, Erich" uniqKey="Fleming E" first="Erich" last="Fleming">Erich Fleming</name>
<name sortKey="Grin, Edmond A" sort="Grin, Edmond A" uniqKey="Grin E" first="Edmond A." last="Grin">Edmond A. Grin</name>
<name sortKey="Grin, Edmond A" sort="Grin, Edmond A" uniqKey="Grin E" first="Edmond A." last="Grin">Edmond A. Grin</name>
<name sortKey="Hock, Andrew N" sort="Hock, Andrew N" uniqKey="Hock A" first="Andrew N." last="Hock">Andrew N. Hock</name>
<name sortKey="Lim, Darlene" sort="Lim, Darlene" uniqKey="Lim D" first="Darlene" last="Lim">Darlene Lim</name>
<name sortKey="Lim, Darlene" sort="Lim, Darlene" uniqKey="Lim D" first="Darlene" last="Lim">Darlene Lim</name>
<name sortKey="Minkley, Edwin" sort="Minkley, Edwin" uniqKey="Minkley E" first="Edwin" last="Minkley">Edwin Minkley</name>
<name sortKey="Morris, Robert L" sort="Morris, Robert L" uniqKey="Morris R" first="Robert L." last="Morris">Robert L. Morris</name>
<name sortKey="Smith, Eric" sort="Smith, Eric" uniqKey="Smith E" first="Eric" last="Smith">Eric Smith</name>
<name sortKey="Uskin Eate, Ingrid" sort="Uskin Eate, Ingrid" uniqKey="Uskin Eate I" first="Ingrid" last="Uskin-Peate">Ingrid Uskin-Peate</name>
<name sortKey="Woosley, Clayton" sort="Woosley, Clayton" uniqKey="Woosley C" first="Clayton" last="Woosley">Clayton Woosley</name>
<name sortKey="Woosley, Clayton" sort="Woosley, Clayton" uniqKey="Woosley C" first="Clayton" last="Woosley">Clayton Woosley</name>
<name sortKey="Yu, Youngseob" sort="Yu, Youngseob" uniqKey="Yu Y" first="Youngseob" last="Yu">Youngseob Yu</name>
</country>
<country name="Chili">
<noRegion>
<name sortKey="Chong, Guillermo" sort="Chong, Guillermo" uniqKey="Chong G" first="Guillermo" last="Chong">Guillermo Chong</name>
</noRegion>
<name sortKey="Demergasso, Cecilia" sort="Demergasso, Cecilia" uniqKey="Demergasso C" first="Cecilia" last="Demergasso">Cecilia Demergasso</name>
<name sortKey="Dorador, Cristina" sort="Dorador, Cristina" uniqKey="Dorador C" first="Cristina" last="Dorador">Cristina Dorador</name>
<name sortKey="Escudero, Lorena" sort="Escudero, Lorena" uniqKey="Escudero L" first="Lorena" last="Escudero">Lorena Escudero</name>
<name sortKey="Gaete, Victor" sort="Gaete, Victor" uniqKey="Gaete V" first="Victor" last="Gaete">Victor Gaete</name>
<name sortKey="Salazar, Carlos" sort="Salazar, Carlos" uniqKey="Salazar C" first="Carlos" last="Salazar">Carlos Salazar</name>
<name sortKey="Tambley, Cristian" sort="Tambley, Cristian" uniqKey="Tambley C" first="Cristian" last="Tambley">Cristian Tambley</name>
</country>
<country name="Allemagne">
<region name="Bavière">
<name sortKey="H Der, Donat P" sort="H Der, Donat P" uniqKey="H Der D" first="Donat P." last="H Der">Donat P. H Der</name>
</region>
</country>
<country name="Australie">
<noRegion>
<name sortKey="Gibson, John" sort="Gibson, John" uniqKey="Gibson J" first="John" last="Gibson">John Gibson</name>
</noRegion>
</country>
<country name="France">
<region name="Île-de-France">
<name sortKey="Galvez, Matthieu E" sort="Galvez, Matthieu E" uniqKey="Galvez M" first="Matthieu E." last="Galvez">Matthieu E. Galvez</name>
</region>
<name sortKey="Dawidowicz, G" sort="Dawidowicz, G" uniqKey="Dawidowicz G" first="G." last="Dawidowicz">G. Dawidowicz</name>
<name sortKey="Majerowicz, J" sort="Majerowicz, J" uniqKey="Majerowicz J" first="J." last="Majerowicz">J. Majerowicz</name>
</country>
</tree>
</affiliations>
</record>

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