«We all have very nasty fears that the flows of the Indus could be severely, severely
affected by glacier melt as a consequence of climate change.
Their sources include church records, commissions of inquiries into glacier disasters, taxes on farms
affected by glaciers, town records, population records, illustrations and lithographs, observations by travellers and scientists, scientific papers, historic articles on glaciers from contemporary sources in English, French, German and Italian, correlation with wine and grain harvest dates, alpine clubs, mountaineers and tree line / plant growth records amongst other sources.
Not exact matches
The rivers that billions of Asians rely on to survive may not be dramatically
affected by the meltdown of
glaciers in the Tibetan Plateau, according to a new report
However, until now, it was thought that the
glaciers were only
affected by events in the northern hemisphere, based on the dating of past glacial advances.
Global warming will also mean more forest fires; hurricanes hitting cities that are at present too far north of the equator to be
affected by them; tropical diseases spreading beyond their present zones; the extinction of species unable to adapt to warmer temperatures; retreating
glaciers and melting polar icecaps; and rising seas inundating coastal areas.
NEWS: Climate change could cause many
glaciers in western Canada to start to disappear
by mid century,
affecting people and places that depend on their water
Notably, the quote «Mölg and Hardy (2004) show that mass loss on the summit horizontal
glacier surfaces is mainly due to sublimation (i.e. turbulent latent heat flux) and is little
affected by air temperature through the turbulent sensible heat flux.»
One thing that is common to sea
glaciers and ice shelves is that they are both
affected by sea level rise.
This can be
affected by warming temperatures, but also
by changes in snowfall, increases in solar radiation absorption due to a decrease in cloud cover, and increases in the water vapor content of air near the earth's surface.2, 14,15,16,17 In Cordillera Blanca, Peru, for example, one study of
glacier retreat between 1930 and 1950 linked the retreat to a decline in cloud cover and precipitation.18
The collapses did not
affect sea levels - ice shelves are thick plates of ice, fed
by glaciers, that float on the ocean around much of Antarctica.
«The Himalayan
Glaciers on the Tibetan Plateau have been among the most
affected by global warming.
Precipitation changes might be significant in particular localities, especially where precipitation is
affected by atmospheric circulation changes, as seems recently to have been the case with southern Scandinavian
glaciers (Oerlemans, 1999).
The findings of this research give a clearer picture of how
glacier flow
affects the Greenland Ice Sheet and shows that this dynamic process is dominated
by a small number of
glaciers.
More than one - sixth of the world's population live in
glacier - or snowmelt - fed river basins and will be
affected by the seasonal shift in streamflow, an increase in the ratio of winter to annual flows, and possibly the reduction in low flows caused
by decreased
glacier extent or snow water storage (high confidence)[3.4.1, 3.4.3].
If — or more likely when — Thwaites and its neighbour, the Pine Island
glacier, ultimately lose all their ice, one estimate suggests that could raise global sea levels
by about 3.4 m, enough to
affect every coastal city on Earth.
This is not due to melting
glaciers: sea levels are
affected by a great many factors, such as the speed at which the earth rotates.
w.r.t. scarred trees (fire,
glacier, avalanches etc)-- one would never use tree - ring data from a scarred tree for a dendroclimatic reconstruction — or at the very least one would use a measured radius where the rings were not
affected by the accelerated growth around the scar.
Each is located in a different part of Greenland and thus are also
affected differently
by their latitude, oceanic currents (for the marine - terminating
glaciers), weather and climatic patterns.
Thus,
glaciers in the steep Himalayas are not only
affected by temperature and precipitation, but also
by debris coverage, and have no uniform and less predictable response, explained the authors.
Melting of snow and
glaciers will lead to increased freshwater influx, changing the chemistry of those oceanic areas
affected by the runoff.
The limited resolution of GRACE
affects the uncertainty of total mass loss to a smaller degree; we illustrate the «real» sources of mass changes
by including satellite altimetry elevation change results in a joint inversion with GRACE, showing that mass change occurs primarily associated with major outlet
glaciers, as well as a narrow coastal band.
Spatially variable response of Himalayan
glaciers to climate change
affected by debris cover.
Parts of the earth that are now rarely
affected by tsunamis, such as northern coastal regions, could be hit
by «glacial earthquakes,» in which
glacier ice crashes to earth in massive landslides.
The observed effects of cryosphere reduction include modification of river regimes due to enhanced glacial melt, snowmelt advance and enhanced winter base flow; formation of thermokarst terrain and disappearance of surface lakes in thawing permafrost; decrease in potential travel days of vehicles over frozen roads in the Arctic; enhanced potential for
glacier hazards and slope instability due to mechanical weakening driven
by ice and permafrost melting; regional ocean freshening; sea - level rise due to
glacier and ice sheet shrinkage; biotic colonisation and faunal changes in deglaciated terrain; changes in freshwater and marine ecosystems
affected by lake - ice and sea - ice reduction; changes in livelihoods; reduced tourism activities related to skiing, ice climbing and scenic activities in cryospheric areas
affected by degradation; and increased ease of ship transportation in the Arctic.
Other factors being investigated are the impact of lakes on Greenland's glacial surfaces, the effect of dust and soot on the ice sheet (which have been shown to have a major impact in accelerating melting in Himalayan
glaciers), and how surface meltwater
affects ice flow into the ocean (previous research has shown that is speeds it and is increased
by short term weather extremes).
The Andes Mountains of South America are home to 99 percent of tropical
glaciers --- permanent rivers of ice at high enough elevations not to be
affected by the types of balmy temperatures usually associated with the tropics.