By lowering albedo, soot from the Industrial Revolution raised the amount of solar radiation
absorbed by snow, leading to Alpine glacier retreat.
Not exact matches
This was not a one - off event: bright
snow is being replaced
by dirty ice that
absorbs more heat and melts faster (see Losing its sparkle).
Clouds do more than just deliver rain and
snow:
by absorbing and reflecting light, they help control the flow of energy around the planet.
Left unchecked, the haze could
absorb solar radiation, warming the Arctic and in turn aggravating global warming
by melting the ice and
snow that reflect some of the Sun's rays back into space.
Not only does it warm the atmosphere
by absorbing sunlight — it's also dark soot that's deposited onto ice and
snow, speeding up the melting.
«The warming effect could be through the direct heating to the air,
snow and sea ice
by absorbing sunlight, and then accelerating the melting of
snow and sea ice,» Wang said.
Directed
by first - timer Mark Fergus, from a script he developed with co-screenwriter Hawk Ostby (both screenwriters for Children of Men), First
Snow is a slow - moving but
absorbing tale about a man forced to come to terms with who he is.
The ocean water below us slowly turned an emerald green hue, caused
by the minerals in the
snow and ice that
absorb the other colors of the spectrum.
Since it reflects the capacity of the climate system to
absorb heat, it may be influenced
by the planetary albedo (sea - ice and
snow) and ice - caps, which respond to temperature changes.
For example: 1) plants giving off net CO2 in hot conditions (r / t aborbing)-- see: http://www.climateark.org/articles/reader.asp?linkid=46488 2) plants dying out due to heat & drought & wild fires enhanced
by GW (reducing or cutting short their uptake of CO2 & releasing CO2 in the process) 3) ocean methane clathrates melting, giving off methane 4) permafrost melting & giving off methane & CO2 5) ice &
snow melting, uncovering dark surfaces that
absorb more heat 6) the warming slowing the thermohaline ocean conveyor & its up - churning of nutrients — reducing marine plant life & that carbon sink.
The black smoke from such stoves also could be contributing to the melting of Himalayan
snow and,
by absorbing sunlight, can add local warming to whatever comes in a particular region from climate change.
In addition, once
snow cover melts completely it often reveals underlying ice that has been darkened
by dust and other particles, whose surface
absorbs more solar energy, promoting heating.
However, as the
snow and ice melts, it's replaced
by dark land and ocean, both of which
absorb energy.
ABSORBED ENERGY The solar radiation that passes through Earth's atmosphere is either reflected off snow, ice, or other surfaces or is absorbed by the Earth's
ABSORBED ENERGY The solar radiation that passes through Earth's atmosphere is either reflected off
snow, ice, or other surfaces or is
absorbed by the Earth's
absorbed by the Earth's surface.
The reason, Werner said, is because the loss of
snow and ice makes the earth's surface less reflective, meaning solar radiation — or heat — is
absorbed in greater amounts
by the exposed dark ocean or tundra.
This increases the amount of solar radiation
absorbed by the surface, which, in turn, accelerates the melting of
snow and ice.
Tom Painter Research Scientist, Jet Propulsion Laboratory, California Institute of Technology Specialties:
Snow hydrology and water resources, energy balance of snow and ice, radiative forcing by light absorbing impurities in snow and ice, imaging spectroscopy and multispectral remote sensing, and planetary
Snow hydrology and water resources, energy balance of
snow and ice, radiative forcing by light absorbing impurities in snow and ice, imaging spectroscopy and multispectral remote sensing, and planetary
snow and ice, radiative forcing
by light
absorbing impurities in
snow and ice, imaging spectroscopy and multispectral remote sensing, and planetary
snow and ice, imaging spectroscopy and multispectral remote sensing, and planetary ices
Fortunately, as depicted in Figure 2 (orange «thermal down surface» arrow), some of this energy does stay in the atmosphere, where it is sent back toward Earth
by clouds, released
by clouds as they condense to form rain or
snow, or
absorbed by atmospheric gases composed of three or more atoms, such as water vapor (H2O), carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4).
Black carbon warms the earth
by directly
absorbing reflected solar radiation and also
by darkening the surface of
snow and ice when it is deposited there (and enhances melting).
These effects are magnified
by snow and ice:
by reducing
snow and ice cover, warming reduces the reflectivity of the ground and allows more solar energy to be
absorbed, further increasing the warming; conversely for cooling.»
Snow and ice reflect more sunlight than bare ground, meaning less solar radiation is
absorbed by the surface.
During the parts of the cycles that increase that radiation on the northern hemisphere, the
snow and ice melt a bit more, which reduces the amount of radiation being reflected to space, which increases the radiation being
absorbed by the ground and water, warming them and in turn warming the atmosphere, which increases the warming of the oceans.
This is particularly true in the spring, when the winter's heavy
snows begin to melt and can not be
absorbed by the still - frozen ground, and in the summer, when heavy rainfall on already saturated ground leads to flash - flooding.