Overblog
Edit post Seguir este blog Administration + Create my blog
13 octubre 2014 1 13 /10 /octubre /2014 20:25

The Quelccaya Ice Cap in Peru has been melting at an alarming rate for years, and in turn, the tropical glacier is slowly getting smaller and smaller as each year passes. In fact, experts have estimated that glacial ice in the Peruvian Andes that took roughly 1,600 years to form has melted away in a mere 25 years.

 

http://upload.wikimedia.org/wikipedia/commons/f/fd/Climbing_in_Huarascaran.jpg

Waskaran, Wallqan and Chopicalqui

 

Perú pierde 40% de superficie glaciar

 

La superficie de los glaciares de Perú se ha reducido en un 40 % durante los últimos 40 años "a causa del cambio climático", según un informe de la Autoridad Nacional del Agua (ANA) 
En el documento se incluye un inventario que ha contabilizado un total de 2.679 glaciares, ubicados en 19 cordilleras nevadas de Perú; entre todos, suman una superficie de 1.300 kilómetros cuadrados, según el comunicado de la ANA.
La Cordillera Blanca, situada en la región andina de Áncash, es la más prolífica en número de glaciares, con 755 y, al mismo tiempo, es una de las más afectadas ya que el 87 % de ellos tiene hoy una superficie menor a un kilómetro cuadrado.
Sólo el 12 % restante de los glaciares abarca más de un kilómetro cuadrado y ninguno se encuentra a una altitud menor a los 4.000 metros sobre el nivel del mar.
Las otras cordilleras con mayor número de glaciares son Vilcanota, entre las regiones sureñas de Cuzco y Puno, con 374 y Vilcabamba, también en Cuzco, con 355 glaciares.
El informe de la Unidad de Glaciología y Recursos Hídricos ha servido además para actualizar la cartografía de la superficie de los glaciares y lagunas a través de tecnologías geoespaciales de percepción remota e inspecciones de campo.
Los datos han sido integrados en un Sistema de Información Geográfica tras ser comparados con los de un inventario de glaciares elaborado en el decenio de los años setenta del siglo pasado.

 

Wallqan as seen from Huaraz (Waras)

Jiron Simon Bolivar en Huaraz

Wallqan (Hualcán) is a mountain in the Cordillera Blanca in the Andes of Peru, about 6,122 metres (20,085 ft) high. It is located in the Ancash Region, Asunción Province, Chacas District, as well as in the Carhuaz Province, Carhuaz District.[5] Wallqan lies south-east of the smaller Chiqllarahu

 

There are sixteen 6,000 m peaks in the Cordillera Blanca with a 400 m topographic prominence, and a further seventeen peaks over 5,500 m.[3] Huascaran Sur, the highest peak, has two commonly quoted heights - 6,746 m from the Peruvian IGM map, and 6,768 m from the OEAV survey map.[4]

 

The Cordillera Blanca ( "White Range") is a mountain range in the Ancash Region of Peru.

 

pri.org/stories/2013-02-26/melting-glaciers-bring-growing-threat-catastrophic-floods

 


The hamlet of Carhuaz, in Peru's Cordillera Blanca Range, could hardly be more picturesque. Birds chirp and venders hawk their goods at an open-air market in the town, tucked into a fold at the furrowed base of snow-capped Mount Hualcan.

So it's hard to imagine what happened here one morning in April, 2009. That's when a curtain of ice weighing perhaps half a million tons slid off Haulcan's shoulder and crashed into a lake below. The collapse raised an 80 foot swell of water, ice and stone that washed over the lake's banks and roared downhill.

Startled farmers below fled in terror.

Estela Pajuelo was inside her sturdy adobe house that morning. She says her young son called to her from outside to run as a wall of mud and boulders headed toward her. She bolted for higher ground just before the wave of debris crushed her home.

"This is killing me, Pajuelo says. "I'm an indigent person. Why is this happening to me?"

The answer, says Peruvian glaciologist Benjamin Morales, is global warming.

Morales says global warming is melting mountain glaciers all around the world faster and faster. According to one new study, the tropical Andes, including the mountains of Peru, lost between 20 and 45 percent of their volume in the last 40 years.

And when the ice retreats, it can create precarious situations.

Morales says lakes often form at the base of a receding glacier. They can be held in place at first by natural gravel dikes, but those barriers are fragile, especially if they're disturbed by an ice fall like the one in Carhuaz.

Carhuaz was actually fortunate. The embankment of its glacial lake had been reinforced with concrete, which limited the size of the flood. 100 homes were hit, but nobody was killed.

But Morales says it could have been different. A glacial lake can destroy a city.

Standing in a steep-walled canyon just below another glacial lake called Palcacocha, Morales tells the tale of what happened here in 1941, when a huge ice outcrop slipped off a glacier and whipped up a wave that breached the lake's bank.

It let loose 4 billion gallons into the canyon, inundating the city of Hauraz below. A third of the town was destroyed and 5,000 people drowned.

That was more than 70 years ago, so climate change probably isn't entirely to blame for these kinds of disasters. But the risks are increasing as glaciers melt faster here and elsewhere.

Cesar Portocarrero oversaw reinforcement of Lake Palcacocha's banks to protect the rebuilt city as further melting ice refilled the lake above. He also designed the dam that kept the avalanche in Carhuaz from turning deadly. He's now retired from the government's Glaciology Office in Huaraz and is sharing the techniques he helped pioneer here oversees.

Portocarrero says Peru is a global example of the fight against the danger of these lakes.

"We're even applying our technology in the Himalayas," he says. He himself is now working as an adviser in Nepal, which, along with China, Bhutan and Pakistan, is responding to new threats from retreating glaciers and growing glacial lakes. Bhutan just wrapped up an arduous construction project 15,000 feet up in the mountains to protect communities in two remote valleys.

Ironically, Portocarrero says he's again concerned about his own city here in Peru. He says the lake above Huaraz has 30 times more water now than when he reinforced its banks in the 1970s, posing a big risk to the city's 150,000 residents.

He says a flood of 10,000 tons of water, soil and rock per second could arrive in Huaraz in less than half an hour.

And Portocarrero says Palcacocha is only one of almost three dozen precarious glacier lakes in the Cordillera Blanca.

Having developed expertise in shoring up these lakes, however, Portocarrero says Peru's central government no longer does the actual construction work. It's transferred that responsibility to regional governments.

But Portocarrero says they're trying to save money, so they're not fixing the lakes, either.

Glaciologists say these risks will eventually subside, but only after most of the world's mountaintop ice has melted away.

In the meantime experts warn that people living near such glaciers should be prepared for more and bigger floods.

This story was reported with help from the Pulitzer Center on Crisis Reporting and the Whole Systems Foundation.

 

Melting Glaciers Bring Growing Threat of Catastrophic Floods

www.pri.org/.../melting-glaciers-bring-growing-thre...
26/2/2013 - Rapidly melting glaciers are creating more and bigger glacial lakes around ... The hamlet of Carhuaz, in Peru's Cordillera Blanca Range, could ...

 

En el documento se incluye un inventario que ha contabilizado un total de 2.679 glaciares, ubicados en 19 cordilleras nevadas de Perú; entre todos, suman una superficie de 1.300 kilómetros cuadrados, según el comunicado de la ANA.

La Cordillera Blanca, situada en la región andina de Áncash, es la más prolífica en número de glaciares, con 755 y, al mismo tiempo, es una de las más afectadas ya que el 87 % de ellos tiene hoy una superficie menor a un kilómetro cuadrado.

Sólo el 12 % restante de los glaciares abarca más de un kilómetro cuadrado y ninguno se encuentra a una altitud menor a los 4.000 metros sobre el nivel del mar.

Las otras cordilleras con mayor número de glaciares son Vilcanota, entre las regiones sureñas de Cuzco y Puno, con 374 y Vilcabamba, también en Cuzco, con 355 glaciares.

El informe de la Unidad de Glaciología y Recursos Hídricos ha servido además para actualizar la cartografía de la superficie de los glaciares y lagunas a través de tecnologías geoespaciales de percepción remota e inspecciones de campo.

Los datos han sido integrados en un Sistema de Información Geográfica tras ser comparados con los de un inventario de glaciares elaborado en el decenio de los años setenta del siglo XX. 

- See more at: http://www.efeverde.com/noticias/peru-superficie-glaciar/#sthash.atqMMHUO.dpuf

 

Peru: Global Warming Makes a Splash | Pulitzer Center

pulitzercenter.org/.../carhuaz-peru-climate-change-gl... 
1/6/2011 - Project overview · Reports · Blog · Events · Search · Subscribe. Mount Hualcan, about 20,000 feet above sea level. Image by Dan Grossman.
Peru-glacier-melt
The Quelccaya Ice Cap in Peru has been melting at an alarming rate for years, and in turn, the tropical glacier is slowly getting smaller and smaller as each year passes. In fact, experts have estimated that glacial ice in the Peruvian Andes that took roughly 1,600 years to form has melted away in a mere 25 years. Similar to the other melting glaciers around the world, the culprit behind this glacier melt is none other than global warming. a recently published study in the journal Geology has confirmed that rising temperatures are responsible. A previous 2006 study had found that the Quelccaya Ice Cap, which is located 18,000 feet above sea level and is the world’s largest tropical ice sheet, had lost 20 percent of its area since 1978; and that the rate of decrease observed on the tropical glacier was increasing by the year. Unfortunately, it's not just the Quelccaya Ice Cap that is at threat--the Pastoruri Glacier in Peru has melted to be half its size in the lat 20 years, and currently, scientists estimate that the glacier will cease to exist in the next decade. Making matters worse is the fact that Peruvian officials have changed their tourism marketing to attract tourists to watch climate change "in real time." The glacier is will have a "climate change route" that will show tourists the lakes that have formed from the melt and the exposed rock. Mikadun/Shutterstock

Peru's Tropical Glacier, Quelccaya Ice Cap, Melting From ...

www.latintimes.com/perus-tropical-glacier-quelccay...
3/3/2014 - Unfortunately, it's not just the Quelccaya Ice Cap that is at threat--the Pastoruri Glacier in Peru has melted to be half its size in the lat 20 years, ..
.
Auquiscocha - Hualcan
Awkishqucha and Wallqan

 

 

Wallqan is located in Peru
Wallqan
Wallqan
Peru
Location
Peru, Ancash Region
Range
Andes, Cordillera Blanca

Compartir este post

Repost0

Comentarios

Présenta

  • : cinabrio blog
  • : Ecología y sostenibilidad socioambiental, énfasis en conservación de ríos y ecosistemas, denuncia de impacto de megaproyectos. Todo esto es indesligable de la política y por ello esta también se observa. Ecology, social and environmental sustainability, emphasis on conservation of rivers and ecosystems, denounces impact of megaprojects. All this is inseparable from politics, for it, the politics is also evaluated.
  • Contacto

Perfil

  • Malcolm Allison H malcolm.mallison@gmail.com
  • Biólogo desde hace más de treinta años, desde la época en que aún los biólogos no eran empleados de los abogados ambientalistas. Actualmente preocupado …alarmado en realidad, por el LESIVO TRATADO DE(DES)INTEGRACIÓN ENERGÉTICA CON BRASIL
  • Biólogo desde hace más de treinta años, desde la época en que aún los biólogos no eran empleados de los abogados ambientalistas. Actualmente preocupado …alarmado en realidad, por el LESIVO TRATADO DE(DES)INTEGRACIÓN ENERGÉTICA CON BRASIL

Recherche

Liens