See
Equilibrium line; Mass balance.
Although, in the tropics, glacier mass balance responds sensitively to changes in precipitation and humidity (see Lemke et al., 2007, Section 4.5.3), the fast glacier shrinkage of Chacaltaya is consistent with an ascent of the 0 °C isotherm of about 50 m / decade in the tropical Andes since the 1980s (Vuille et al., 2003), resulting in a corresponding rise in
the equilibrium line of glaciers in the region (Coudrain et al., 2005).
If the annual
equilibrium line, that is the elevation where snowpack remains at the end of the summer, rises above the mountain top this will lead to glacier loss.
The equilibrium line is the elevation on a glacier at which annual accumulation equals ablation.
A glacier that is approaching equilibrium during retreat will thin mostly near the terminus, and at some elevation above the terminus, usually near
the equilibrium line or in the lower accumulation zone, there will be comparatively little thinning (Schwitter and Raymond, 1993).
Miller, G.H., Bradley, R.S. and Andrews, J.T., 1975: The glaciation level and lowest
equilibrium line altitude in the High Canadian Arctic: maps and climatic interpretation.
Reconstructed mass balance yielded accumulation and ablation each of ~ 3 km3 / yr, with glacial movement near
the equilibrium line altitude dominated by basal sliding.Pollen and charcoal records from three lakes in northern Yellowstone provide information on the postglacial vegetation and fire history.
Equilibrium line - The boundary between the region on a glacier where there is a net annual loss of ice mass (ablation area) and that where there is a net annual gain (accumulation area).
From the head of the glacier at 1300 m to the mean
Equilibrium Line Altitude (ELA) at an elevation of 1050 - 1100 m the glacier flows northward.
The altitude separating the accumulation zone from the ablation zone is known as
the equilibrium line altitude.
To give another, more specific example, at a typical glacier on Mt. Baker, in Washington State, a summer temperature increase of 1 °C translates to a ~ 150 m increase in the altitude of
the equilibrium line (the point where annual ice accumulation = annual loss), and a resulting ~ 2 km retreat of the glacier terminus.
A warming of 1 degree C is sufficient to raise
the equilibrium line (below which net ablation occurs) by fully 300 meters.
However, if
the equilibrium line rises to the summit of the mountain, the accumulation zone disappears altogether and the glacier is doomed.
Additional data often mapped by satellite and added to glacier inventories include changing ice debris cover20, rock glaciers21,
equilibrium line altitude22, grounding zones23 and glacial lake extent24, 25.
Another factor that went into the analysis involved what's known as
the equilibrium line — the altitude where the snow is neither piling up year to year nor shrinking.
Not exact matches
Over time, even the most nurturing associations can become toxic to a career, affecting the
equilibrium of the work environment and, potentially, the company's bottom
line.
For starters, global oil production appears more closely in
line with demand following a prolonged search for a new
equilibrium amid a breakdown in the Organization of Petroleum Exporting Countries (OPEC) cartel and increasingly productive oil extraction technologies in North America.
Of course, that final
line — that there is a new, higher «
equilibrium valuation of equities» — is surely to remind some market historians of Irving Fisher's famous
line that stocks had reach a new «permanently high plateau» on the eve of the 1929 stock market crash which ushered in the Great Depression.
No particular experiences are
lined up with any particular statements in the interior of the field, except indirectly through considerations of
equilibrium affecting the field as a whole... Any statement can be held true, come what may, if we make drastic enough adjustments elsewhere in the system.10
«Being within our denomination opens some doors and acceptance it would not otherwise have, and it also gives us a
line of accountability that maintains
equilibrium,» Moore said.
The political theologian seeking a theoretical basis for social transformation could argue on Hegelian
lines, and thereby place the questionable call for social transformation in the context of a move towards the justice and
equilibrium of the rational State.
The honest thief, the tender murderer, The superstitious atheist, demi - rep That loves and saves her soul in new French books — We watch while these in
equilibrium keep The giddy
line midway.
Although filaments like fishing
line are thin, they are orders of magnitude thicker than a soap film in
equilibrium, meaning that the area of the soap film can change depending on the point at which the film contacts the loop.
Greischar, L.L., and C.R. Bentley, Isostatic
equilibrium grounding
line between the West Aantarctic Ice Sheet and the Ross Ice Shelf, Nature, Vol.
If you can develop a strong internal sense of this
line, it will help your nervous system calibrate movements that maintain
equilibrium around the
line.
To do this, you must distribute your body weight in
equilibrium on either side of the plumb
line.
But it's important to understand that distributing your weight in
equilibrium doesn't necessarily mean placing equal weight on each side of the
line, as you do in Tadasana.
There's a very fine
line between quirky and kooky and in burying that
line in mud, grime and spittle, Ross succeeds in finding an
equilibrium, all be it one that often falters awkwardly.
The actual red
line is simply the point when the engine power output is in
equilibrium with the power input required by the vehicle.
Trend following may also work in times of persistent excess (contango) However, the run of contango commodities experienced from 2005 - 2012, seems to have ended and commodities are currently hovering at the
line near
equilibrium where short term disruptions swing the pendulum quickly.
Rather, he locates a fitting
equilibrium between analytic and emotional content within those borders through deftly disciplined improvisation, which involves a highly purposeful and invariably well - judged deployment of color and
line.
Her gestural brushstrokes seem at once violent and poetic, capturing the energy and gesture of her signature calligraphic
line caught and held in a quiet
equilibrium.
The modifications he introduced affected the group's final
equilibrium, always reiterating in both media the same conceptual aspects and technical solutions: simplicity, flatness,
line, gesture, and ideogram.
Mangold seeks an
equilibrium between the recurring elements in his work: simple geometric forms, coloured with hand - made tints, and often curvilinear
lines hand - drawn within these forms.
How about this brutally simplified calculation for a lower bound of
equilibrium temperature sensitivity: — there seems to be a consensus that transient t.s. <
equilibrium t.s. — today, the trend
line is a + 1 C (see Columbia graph)-- CO2 is at 410, which is 1.46 * 280 — rise is logarithmic, log (base2) of 1.46 = 0.55 — 1/0.55 = 1.8 — therefore, a lower bound for ETS is 1.8 C
Depending on meridional heat transport, when freezing temperatures reach deep enough towards low - latitudes, the ice - albedo feedback can become so effective that climate sensitivity becomes infinite and even negative (implying unstable
equilibrium for any «ice -
line» (latitude marking the edge of ice) between the equator and some other latitude).
In your many
lines — thankyou — i found the key argument how you can be convinced that the temperature only creates variation for a very short time: YOu write: «The net result is that a new
equilibrium (at a higher CO2 level) is reached in relative short time, between a few months (seasons) to a few years (sustained higher average temperature level).»
While the real atmosphere is not beset by giant electrical coils, it does (in theory) have infrared emitters (GHGs) which alter the
equilibrium temperature of the ocean surface, so the thought experiment is enough to show that the
line of reasoning you presented is unphysical.
It also states, «No best estimate for
equilibrium climate sensitivity can now be given because of a lack of agreement on values across assessed
lines of evidence and studies.»
Note 16 «No best estimate for
equilibrium climate sensitivity can now be given because of a lack of agreement on values across assessed
lines of evidence and studies.»
[¶]... Basing our assessment on a combination of several independent
lines of evidence, as summarised in Box 10.2 Figures 1 and 2, including observed climate change and the strength of known feedbacks simulated in GCMs, we conclude that the global mean
equilibrium warming for doubling CO2, or «
equilibrium climate sensitivity», is likely to lie in the range 2 °C to 4.5 °C, with a most likely value of about 3 °C.
By the way Kenneth, you were commented on the
line «when it warms, glaciers retreat until either a new
equilibrium between ablation and accumulation is found or until they disappear.»
to restating the party
line, that an isolated gas with an ALR is in a stable thermal
equilibrium (generally not addressing the clear violation that implies via figure 2).
That is correct except drop «temperature» in the 2nd
line, especially in Fig. 1
equilibrium.
It suggests that tree -
line vegetation is in a dynamic
equilibrium with climate in the absence of other external disturbances; this is emphasized by spruce reaction through phenotypic adaptation — a shift from stunted individuals (krummholz) to normal trees (forest)-- and differential regeneration.
The BEST team also found that the observed warming is consistent with an
equilibrium climate sensitivity of 3.1 ± 0.3 °C for CO2 doubling, in
line with the IPCC climate sensitivity range, and demonstrates once again that contrary to the persistent claims of Richard Lindzen, the Earth has warmed as much as we expect given a relatively high climate sensitivity.
As discussed in the article on natural cycles of ocean «acidification», and illustrated in the graph below by Martinez - Boti, over the past 15,000 years proxy data (thick
lines) has determined surface pH has rarely been in
equilibrium with expectations (green
line) based on models driven by atmospheric CO2.
The
equilibrium climate sensitivity will be about 50 % greater than this due to the ocean acting as a heat sink, so the ECS will be about 3C, in
line with the mean estimate from the models.
The only thing I find noteworthy is that it further reinforces the point that there is no scientific consensus on a best estimate for
equilibrium climate sensitivity, which is entirely in agreement with the IPCC's statement in AR5 WG1 SPM: «No best estimate for
equilibrium climate sensitivity can now be given because of a lack of agreement on values across assessed
lines of evidence and studies.»
Jim, the bottom
line for me is that for the earth to be in radiative thermal equiibrium with the sun, it has not been demonstrated that any change in chemical composition of the earth or atmosphere is able to affect the
equilibrium temperature, providing this does not change albedo.