PLANETA TIERRA: Nuestro Querido Hogar
 
Desapareciendo ante nuestros ojos: el grave estado del hielo ártico   

HOST: Concerned viewers, welcome to this week’s edition of Planet Earth: Our Loving Home, featuring our program on the state of Arctic sea ice and glaciers. The Arctic is the polar crown of our planet, yet the ice and snow in this precious area are disappearing at an unprecedented rate due to climate change, which is driven by the production and consumption of animal products.

These destructive practices are the main source for the human-generated greenhouse gases rapidly heating the globe.

Today we’ll examine how the beautiful but fragile northern polar region is vital to life on our Earth and how it affects weather and climate. One way in which the Arctic plays a key role in regulating global temperatures is through the ice-albedo effect, by which the area’s ancient layer of snow and sea ice reflects 85 to 90% of the Sun’s energy back into space, keeping our planet cool.

Hence, the more ice and snow that are present in the region, the cooler our Earth becomes.  
However when this cover disappears, the opposite effect occurs, as the dark, Arctic Ocean and exposed Arctic land absorb the Sun’s energy and cause planetary warming, which in turn drives more melting and more exposure of these non-reflective surfaces.

Oceanographer Dr. James Overland of the US National Oceanic and Atmospheric Administration’s Pacific Marine Environmental Laboratory directs research on this phenomenon and will now provide more details.

James(m): Without ice there to reflect the summer sunlight from the white ice, we absorb a whole lot more heat from the Sun that the Earth normally used to not get, and that heat is returned to the atmosphere in the fall, and that helps set up these highly variable climate patterns.


For more details on the scientists featured in today’s program, please visit the following respective websites:
Dr. David Barber
www.UManitoba.ca
Dr. James Hansen
www.GISS.NASA.gov
Professor Anders Levermann
www.PIK-Potsdam.de
Dr. James Overland


 
Buscar en todos los programas
 
 
Lo más popular
 PLANETA TIERRA: NUESTRO QUERIDO HOGAR Veganismo: La forma más rápida para enfriar al planeta P1/4
 PLANET EARTH:OUR LOVING HOME Dr. Rajendra K. Pachauri-Global Warning: The Impact of Meat Production and Consumption on Climate Change P1/2
 PLANET EARTH: OUR LOVING HOME “Changes in Climate, Changes in Lives” - A Message from Greenpeace Brasil, P1/2 (In Portuguese)
 PLANET EARTH:OUR LOVING HOME Ahimsa Agriculture:Organic Farming without Soil
 PLANETA TIERRA: NUESTRO QUERIDO HOGAR Los efectos devastadores de una granja industrial porcina –P1 de 2
 PLANETA TIERRA: NUESTRO QUERIDO HOGAR El método de agricultura natural de Yoshikazu Kawaguchi – P1 de 2 (japonés)
 PLANET EARTH: OUR LOVING HOME No Water Required! Dry Farming in Âu Lạc (Vietnam)
 PLANETA TIERRA: NUESTRO QUERIDO HOGAR “Hogar”: Un documental ecológico por Yann Arthus-Bertrand - P1/3
 PLANET EARTH: OUR LOVING HOME The Enchanted World of Native Gardens with Alrie Middlebrook P1/2
 PLANETA TIERRA: NUESTRO QUERIDO HOGAR Salvando las tierras firmes: Convención de las Naciones Unidas COP10 para combatir la desertificación- P1/3