Científicos escanearon el hielo Antártico y encontraron este secreto.
Científicos escanearon el hielo Antártico creando un nuevo mapa de las montañas, valles y cañones ocultos que revelaron un secreto.
Con nuevas herramientas tecnológicas, un grupo de científicos escaneó el hielo Antártico y este reveló a tierra más profunda, hallada en el planeta Tierra, y ayudará a pronosticar la futura pérdida de hielo.
El continente helado del sur puede verse bastante plano y sin rasgos distintivos desde arriba. Pero luego del escaneo comenzó la alarma de los expertos.
Pero debajo de la capa de hielo que se ha acumulado durante eones, hay un continente antiguo, tan texturizado como cualquier otro.
Y esa textura resulta ser muy importante para predecir cómo y cuándo fluirá el hielo y qué regiones de hielo son más vulnerables en un mundo en calentamiento.
El nuevo mapa de la NASA, llamado BedMachine Antarctica, combina mediciones del movimiento del hielo Antártico.
Así como mediciones sísmicas, de radar y otros puntos de datos para crear la imagen más detallada hasta ahora de las características ocultas de la Antártida.
Particularmente, los resultados muestran un panorama preocupante en lo relativo al cambio climático, que podría ser que la humanidad esté enfrentando su mayor amenaza jamás.
En voz de los expertos.
Mathieu Morlighem, científico del sistema terrestre de la Universidad de California, Irvine y el autor principal de un nuevo artículo sobre el mapa, dijo en un comunicado:
Al utilizar BedMachine para hacer zoom en sectores particulares de la Antártida, encontrará detalles esenciales, como protuberancias y huecos debajo del hielo que pueden acelerar, ralentizar o incluso detener el retroceso de los glaciares.
El nuevo mapa, publicado en la revista Nature Geoscience, revela características topográficas previamente desconocidas que dan forma al flujo de hielo en el continente helado.
Las características previamente desconocidas tienen importantes implicaciones para la respuesta de los glaciares al cambio climático.
Los autores enfatizan que “por ejemplo, los glaciares que atraviesan las Montañas Transantárticas están protegidos por cordilleras amplias y estabilizadoras».
El hielo Antártico.
Comprender cómo fluye el hielo Antártico se vuelve cada vez más importante a medida que la Tierra se calienta.
Si todo el hielo Antártico se derritiera, aumentaría el nivel global del mar en unos 60 metros, según el Centro Nacional de Datos de Nieve y Hielo.
Eso no es probable en el corto plazo, pero incluso si se derritieran pequeñas fracciones del continente, tendría efectos globales devastadores.
En los datos se incluyen pruebas del cañón más profundo del planeta Tierra.
Al estudiar la cantidad de hielo que fluye a través de una región estrecha y particular conocida como la depresión de Denman cada año.
Ahí, los investigadores se dieron cuenta de que debe sumergirse al menos a 3,500 metros por debajo del nivel del mar para acomodar todo el volumen de agua congelada.
Eso es mucho más profundo que el Mar Muerto, la región de tierra más expuesta.
Esta se encuentra a 432 metros por debajo del nivel del mar, según el Centro de Investigación Oceanográfica y Limnológica de Israel.
El mapa ofrece una gran cantidad de información nueva sobre precisamente qué regiones del hielo Antártico y del continente tienen mayor riesgo de deslizarse hacia el océano en las próximas décadas y siglos, escribieron los autores.
Con información de Nature Geoscience.
Somos Extremo Mundial.
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