ICE MICROSTRUCTURE AND MECHANICS, AND ITS IMPLICATIONS FOR THE INTEGRITY OF WEATHER PROXIES IN ICE TELLERS (Q3147171): Difference between revisions
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LA MICROSTRUCTURE ET LA MÉCANIQUE DES GLACES, ET LEURS IMPLICATIONS POUR L’INTÉGRITÉ DES PROCURATIONS MÉTÉOROLOGIQUES DANS LES DISJONCTEURS DE GLACE | |||
Revision as of 15:41, 2 December 2021
Project Q3147171 in Spain
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | ICE MICROSTRUCTURE AND MECHANICS, AND ITS IMPLICATIONS FOR THE INTEGRITY OF WEATHER PROXIES IN ICE TELLERS |
Project Q3147171 in Spain |
Statements
90,750.0 Euro
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181,500.0 Euro
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50.0 percent
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1 January 2019
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31 December 2021
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ASOC BC3 BASQUE CENTRE FOR CLIMATE CHANGE-KLIMA ALDAKETA IKERGAI
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43°19'37.56"N, 2°59'4.60"W
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48054
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LOS GLACIARES Y LAS CAPAS DE HIELO SON ELEMENTOS ESENCIALES DEL SISTEMA CLIMATICO DE LA TIERRA. SUS INTERACCIONES CON EL MEDIO AMBIENTE PUEDEN TENER IMPLICACIONES DRAMATICAS PARA LA VIDA EN EL MUNDO, COMO LO DEMUESTRAN SUS PAPELES EN EL AUMENTO DEL NIVEL DEL MAR Y EL CALENTAMIENTO GLOBAL. TALES INTERACCIONES AMBIENTALES PERMANECEN REGISTRADAS EN LA MICROESTRUCTURA DEL HIELO, EN FORMA DE IMPUREZAS COMO BURBUJAS DE AIRE, PARTICULAS Y OTROS PROXIES CLIMATICOS ENTERRADOS POR LAS NEVADAS POSTERIORES. SUCEDE, SIN EMBARGO, QUE LOS GLACIARES Y LAS CAPAS DE HIELO FLUYEN. SE ARRASTRAN CUESTA ABAJO BAJO SU PROPIA CARGA, ALTERANDO LA ESTRATIGRAFIA DEL HIELO MAS PROFUNDO Y, EN CONSECUENCIA, DESTRUYENDO LA INTEGRIDAD DE SUS REGISTROS CLIMATICOS MAS ANTIGUOS. UNA ESTIMACION PRECISA DE ESTE FLUJO ES ESENCIAL NO SOLO PARA LOS PRONOSTICOS CONFIABLES DEL AUMENTO DEL NIVEL DEL MAR, SINO TAMBIEN PARA LA RECONSTRUCCION DE LOS REGISTROS CLIMATICOS PERTURBADOS DE TESTIGOS DE HIELO. POR TODAS ESTAS RAZONES, LOS GLACIOLOGOS HAN ESTADO LUCHANDO POR PRODUCIR MODELOS CADA VEZ MAS SOFISTICADOS DE FLUJO DE GLACIARES Y CAPAS DE HIELO. SIN EMBARGO, CON DEMASIADA FRECUENCIA ESTOS MODELOS SE BASAN EN TEORIAS OBSOLETAS, A VECES INCLUSO DOGMATICAS, DE LA MECANICA DEL HIELO, QUE IGNORAN ASPECTOS ESENCIALES DE LA MICROESTRUCTURA Y LAS PROPIEDADES FISICAS DEL HIELO NATURAL. EN PARTICULAR, NUMEROSOS ESTUDIOS SOBRE TESTIGOS DE HIELO Y PERFORACIONES HAN REVELADO UNA CLARA CORRELACION ENTRE LA MICROESTRUCTURA, LAS PROPIEDADES MECANICAS Y LAS IMPUREZAS EN EL HIELO NATURAL, EN FORMA DE UNA INTERACCION DE ESTRUCTURA-FLUJO-MEDIO AMBIENTE MULTIESCALA (SFEI, ACRONIMO DEL INGLES). HASTA LA FECHA, NO EXISTE UN MODELO INTEGRAL CAPAZ DE ABORDAR TODOS LOS ASPECTOS DEL SFEI EN EL HIELO NATURAL. EL OBJETIVO DE IMECHPRO ES AYUDAR A CORREGIR ESTE DEFECTO, A TRAVES DE UN ESTUDIO SISTEMATICO DE LAS INTERACCIONES EN EVOLUCION ENTRE LA MICROESTRUCTURA, LAS IMPUREZAS Y LA MECANICA DEL HIELO NATURAL. ESTE PROYECTO INVOLUCRA MICROSCOPIA OPTICA AVANZADA Y PRUEBAS MECANICAS DE HIELO NATURAL EN EL IZOTZALAB, EL NUEVO LABORATORIO DE BAJA TEMPERATURA EN BC3, COMBINADO CON LA INTERPRETACION DE DATOS DE CAMPO, ANALISIS DE IMAGENES DIGITALES DE MICROGRAFIAS NUEVAS Y YA EXISTENTES, MODELOS CONCEPTUALES Y MATEMATICOS. MUESTRAS DE HIELO, DATOS DE CAMPO, REGISTROS DE ESTRATIGRAFIA Y MICROGRAFIAS ESTARAN DISPONIBLES EN DIVERSOS SITIOS, INCLUYENDO ANTARTIDA, GROENLANDIA, PIRINEOS Y POSIBLEMENTE TAMBIEN LOS ALPES, PATAGONIA, ALASKA Y SIBERIA, CUBRIENDO UNA AMPLIA GAMA DE VARIEDADES DE HIELO Y CONDICIONES CLIMATICAS. LOS RESULTADOS DE IMECHPRO ALLANARAN EL CAMINO A UNA NUEVA GENERACION DE MODELOS DE FLUJO DE GLACIARES Y CAPAS DE HIELO, CONSIDERANDO TODOS LOS MECANISMOS DE DEFORMACION Y PROCESOS MICROESTRUCTURALES QUE TIENEN LUGAR EN EL HIELO NATURAL, COMBINADOS CON DESCRIPCIONES REALISTAS DE LA FORMACION Y LA DEGRADACION DEL PROXY CLIMATICO. (Spanish)
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GLACIERS AND ICE SHEETS ARE ESSENTIAL ELEMENTS OF EARTH¿S CLIMATE SYSTEM. THEIR INTERACTIONS WITH THE ENVIRONMENT CAN HAVE DRAMATIC IMPLICATIONS FOR LIFE ON THE GLOBE, AS DEMONSTRATED BY THEIR ROLES IN SEA-LEVEL RISE AND GLOBAL WARMING. SUCH ENVIRONMENTAL INTERACTIONS REMAIN RECORDED IN THE ICE MICROSTRUCTURE, IN FORM OF IMPURITIES LIKE AIR BUBBLES, PARTICLES, AND OTHER CLIMATE PROXIES BURIED BY SUBSEQUENT SNOWFALLS. IT HAPPENS, HOWEVER, THAT GLACIERS AND ICE SHEETS FLOW. THEY CREEP DOWNSLOPE UNDER THEIR OWN BURDEN, DISRUPTING THE STRATIGRAPHY OF DEEPEST ICE, AND CONSEQUENTLY DESTROYING THE INTEGRITY OF THEIR OLDEST CLIMATE RECORDS. A PRECISE ESTIMATE OF THIS FLOW IS ESSENTIAL NOT ONLY FOR RELIABLE PROGNOSES OF SEA-LEVEL RISE, BUT ALSO FOR THE RECONSTRUCTION OF DISTURBED ICE-CORE CLIMATE RECORDS. FOR ALL THESE REASONS, GLACIOLOGISTS HAVE BEEN STRUGGLING TO PRODUCE EVER MORE SOPHISTICATED MODELS OF GLACIER AND ICE-SHEET FLOW. NEVERTHELESS, TOO OFTEN THESE MODELS RELY ON OUTDATED, SOMETIMES EVEN DOGMATIC THEORIES OF ICE MECHANICS, WHICH IGNORE ESSENTIAL ASPECTS OF THE MICROSTRUCTURE AND PHYSICAL PROPERTIES OF NATURAL ICE. IN PARTICULAR, NUMEROUS ICE-CORE AND BOREHOLE STUDIES HAVE REVEALED A CLEAR CORRELATION BETWEEN MICROSTRUCTURE, MECHANICAL PROPERTIES, AND IMPURITIES IN NATURAL ICE, IN FORM OF A MULTISCALE STRUCTURE¿FLOW¿ENVIRONMENT INTERPLAY (SFEI). TO DATE, THERE EXISTS NO HOLISTIC MODEL CAPABLE OF ADDRESSING ALL ASPECTS OF THE SFEI IN NATURAL ICE. THE OBJECTIVE OF IMECHPRO IS TO HELP CORRECTING THIS FLAW, THROUGH A SYSTEMATIC STUDY OF THE EVOLVING INTERACTIONS AMONG MICROSTRUCTURE, IMPURITIES, AND MECHANICS OF NATURAL ICE. THIS PROJECT INVOLVES ADVANCED OPTICAL MICROSCOPY AND MECHANICAL TESTS OF NATURAL ICE AT THE IZOTZALAB, THE NOVEL LOW-TEMPERATURE LABORATORY AT BC3, COMBINED WITH INTERPRETATION OF FIELD DATA, DIGITAL IMAGE ANALYSIS OF NEW AND ALREADY EXISTING MICROGRAPHS, CONCEPTUAL AND MATHEMATICAL MODELLING. ICE SAMPLES, FIELD DATA, STRATIGRAPHY RECORDS, AND MICROGRAPHS WILL BE AVAILABLE FROM DIVERSE SITES, INCLUDING ANTARCTICA, GREENLAND, THE PYRENEES, AND POSSIBLY ALSO THE ALPS, PATAGONIA, ALASKA, AND SIBERIA, THEREFORE COVERING A WIDE RANGE OF ICE VARIETIES AND CLIMATIC CONDITIONS. THE RESULTS FROM IMECHPRO SHALL PAVE THE WAY TO A NEW GENERATION OF GLACIER AND ICE-SHEET FLOW MODELS, BY CONSIDERING ALL DEFORMATION MECHANISMS AND MICROSTRUCTURAL PROCESSES TAKING PLACE IN NATURAL ICE, COMBINED WITH REALISTIC DESCRIPTIONS OF CLIMATE PROXY FORMATION AND DECAY. (English)
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Leioa
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Identifiers
RTI2018-100696-B-I00
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