Sentences with phrase «measuring glacier change»
«The novelty of our study lies in the bigger picture — measuring glacier change over all main glaciated ranges in Bolivia — and in the identification of potentially dangerous lakes for the first time,» Cook says.
https://www.sciencedaily.com/ Not exact matches
Although CryoSat - 2 is designed to measure changes in the ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and sea floor geometry and the Archimedes principle of buoyancy — which relates the thickness of floating ice to the height of its surface.
They used a dating technique perfected in the last 20 years that measures elemental changes in the rock that occur when the rock gets bombarded by cosmic rays after the glacier's retreat.
The team measured glacier area change from 1986 to 2014 using satellite images from Landsat, the U.S. Geological Survey's and NASA's Earth observation programme.
For a separate study, the NASA Jet Propulsion Laboratory's Ala Khazendar — a co-author of Scheuchl's paper — measured ice loss at the bottom of the three glaciers, which he suspected might be influencing the changes in their grounding lines.
With lots of charts and graphs of geological ages, real climate change in our life - time was totally dismised; and his own research in measuring the density of icecaps via core samples was used to discount the melting of glaciers.
The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.
There are many uncertainties as to when the glaciers will be entirely gone > Jimbo's link (his 4th) on the Science news story, which is identical to the recent tempest in a teapot about the Himalayan glaciers > At a time when governments are baulking at taking tough measures to combat climate change, this new blow to the credibility of the IPCC could not have come at a worse time.»
Another issue with many of these indicators is that they have a long and unknown lag time between a temperature change and the indicator changing; e.g., a glacier might start melting decades before it's retreat is clearly measured, permafrost might have been warming up since the 1930's and just started visibly melting, etc..
According to the second study, which measured changes in the thickness and height of ice using radar and laser altimetry instruments flown as part of NASA's Operation IceBridge campaign, the glacier lost between 984 and 1,607 feet in thickness from 2002 to 2009.
Climate change, sea level rise, Greenland Ice Sheet, Antarctic ice loss, glaciers, using satellite data and laser altimetry to measure the Earth
Although CryoSat - 2 is designed to measure changes in the ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and sea floor geometry and the Archimedes principle of buoyancy — which relates the thickness of floating ice to the height of its surface.
By Sreeja VN: Sizzling underwater glacial ice, as it melts into warmer sea water, creates one of the loudest natural marine environments, and the air bubbles that pop during the process could help scientists measure the rate of glacier melt and track fast - changing polar environments.
That's what Syed Iqbal Hasnain is after... For years he and a small band of students have climbed Himalayan glaciers, like the East Rathong, measuring them and tracking their changes.
Measuring the temperature of the ocean near to tidewater glaciers is an extreme challenge, and we know very little about whether it is changing.
The GEM project has five main themes: - ClimateBasis: records meteorology and hydrology parameters - BioBasis: monitors plant and animal populations and interactions - GeoBasis: measures greenhouse gases from the tundra and collects geological data - GlacioBasis: monitors the three glaciers in Greenland - MarineBasis: records physical, chemical, and biological changes in the sea
''... the revelations this week have opened a heated debate that goes beyond the science of glaciers and to the heart of the credibility of the IPCC... At a time when governments are baulking at taking tough measures to combat climate change, this new blow to the credibility...