Not exact matches
The spatial deposition of sulfur particles in the bipolar
ice cores, as calculated in the model, agrees well
with the actually measured
deposits of large volcanic eruptions, such as Pinatubo in 1991 or even of Tambora of 1815.
«In any case, the results of our model study give a clear indication that the bipolar variability of sulfate
deposits must be taken into consideration if the traces of large volcanic eruptions are to be deduced from
ice cores,» says Dr. Krüger, «Several research groups that deal
with this issue have already contacted us to verify their data through our model results.»
Dundas and co-authors say that banding and color variations apparent in some of the scarps suggest layers «possibly
deposited with changes in the proportion of
ice and dust under varying climate conditions.»
Where fractures reached the surface, this vapor could escape energetically, carrying
with it
ice and salt particles and
depositing them on the surface.
«While cold traps may provide surface
deposits of water
ice as have been seen at the moon and Mercury, Ceres may have been formed
with a relatively greater reservoir of water,» said Chris Russell, principal investigator of the Dawn mission, based at the University of California, Los Angeles.
Data reported by NASA's New Horizons New Horizons mission to the Pluto system shows unusual terrain in this region, which features a large
deposit of nitrogen
ice with a pattern of polygons that are thickest at their centers and dip at their edges.
Their findings indicated that twice as much soot was
deposited on snow in winter compared
with summer, meaning that the sunlight - absorbing soot likely caused greater melting of the Arctic
ice cap during the winter.
After downloading a few files from his site and
depositing them in my Celestia folder, I found myself staring at a blue planet, cloud formations swirling across its surface, its vast oceans punctuated
with landmasses and polar
ice caps.
Based on these figures, I suppose that the West Greenland
ice melting was larger in the 1930 - 1950 period than in the 1985 - 2005 period... Alternative explanations may be that the Greenland
ice melting has nothing to do
with temperature, but
with more insolation (less clouds), less precipitation, more soot
deposit,...
That calibration enabled the researchers to detect high reflectance
deposits consistent
with surface
ice in three large craters for which only off - nadir detections were available.
The latter events left behind distinctive rock - sequences typically consisting of tillites (ancient boulder - clay, now solid rock) representing
ice -
deposited debris, overlain
with a depositional break by cap - carbonates (chemical sediments of marine origin
deposited during interglacials following global sea - level rises).
«This
deposit is probably more accessible than most water
ice on Mars, because it is at a relatively low latitude and it lies in a flat, smooth area where landing a spacecraft would be easier than at some of the other areas
with buried
ice,» researcher Jack Holt of the University of Texas said in a statement.
Huge chunks of smooth, dazzlingly blue
ice are
deposited on the beach and
with the changing tidal waters, you never quite know what the layout of the beach is going to be until you get there.
Can accommodate 6 adults and one or two small kids Fully Equipped, kitchen including coffee percolator and fridge
with ice and filtered water dispenser Living room
with view and flatscreen tv
with full DStv Entertainment area
with braai and view 3 x Bedrooms, two
with queen sized beds and TV» s and one
with double bed (two bedrooms
with beautiful views) 3 x Bathrooms (two
with bath and shower and one
with shower only — one bathroom
with awesome views from the bath) 1 x Sleeper Couch (one more can be added if required) Suitable for 6 adults and few kids Wi - Fi Safe parking for 2 or 3 cars behind electric gate Daily cleaning service and laundry service included in offer 50 %
Deposit due upon confirmation Balance plus key
deposit due upon arrival NNB: BRING YOUR CAMERA — THE PHOTO OF VIEW BELOW WAS TAKEN BY ME EARLY ONE MORNING HIGH SEASON OFFERS: House can very comfortably accommodate 6 Adults and few children Requirements: Minimum stay of 5 nights OPTION A: 5 Nights, (R20 000 for total package) R4000 per night Full daily cleaning
with laundry included Welcoming Basket OPTION B: 7 day PACKAGE includes: If booking for 7 Nights, Package for R26 000 for the period Full daily cleaning
with laundry service included 3 bottles of wine Welcoming Basket OPTION C: 10 day PACKAGE includes: If booking for 10 Nights, Package for R32 500 Full daily cleaning service
with laundry included 6 Bottles of wine Welcoming basket OPTION D: FOR STAY LONGER THAN 10 DAYS R3000 PER NIGHT Full daily cleaning service
with daily laundry included 12 bottles of wine Welcoming basket Dates still available December 2018 and January 2019 Self Catering - laundry and daily cleaning, amazing kitchen, Sleep 6 - 8 - 3 bedrooms, 3 bathrooms, 2 sleeper couch in living area, inside braai facility and a amazing view.
You also are clearly ignorant of the evidence for Neoproterozoic and Paleoproterozic «Snowball Earth» episodes, which not only involve near - global
ice cover, but also would be followed by extremely hot postglacial climates
with temperatures of 40 - 50C — not yet observed, but not yet ruled out by any geological
deposits by any means.
Based on these figures, I suppose that the West Greenland
ice melting was larger in the 1930 - 1950 period than in the 1985 - 2005 period... Alternative explanations may be that the Greenland
ice melting has nothing to do
with temperature, but
with more insolation (less clouds), less precipitation, more soot
deposit,...
Has anyone taken recently
deposited firn, mechanically compressed it to form
ice, aged it for a while, then analyzed the
ice using the present
ice core analysis techniques to see if the results agree
with the present atmosphere?
RealClimate is wonderful, and an excellent source of reliable information.As I've said before, methane is an extremely dangerous component to global warming.Comment # 20 is correct.There is a sharp melting point to frozen methane.A huge increase in the release of methane could happen within the next 50 years.At what point in the Earth's temperature rise and the rise of co2 would a huge methane melt occur?No one has answered that definitive issue.If I ask you all at what point would huge amounts of extra methane start melting, i.e at what temperature rise of the ocean near the Artic methane
ice deposits would the methane melt, or at what point in the rise of co2 concentrations in the atmosphere would the methane melt, I believe that no one could currently tell me the actual answer as to where the sharp melting point exists.Of course, once that tipping point has been reached, and billions of tons of methane outgass from what had been locked stores of methane, locked away for an eternity, it is exactly the same as the burning of stored fossil fuels which have been stored for an eternity as well.And even though methane does not have as long a life as co2, while it is around in the air it can cause other tipping points, i.e. permafrost melting, to arrive much sooner.I will reiterate what I've said before on this and other sites.Methane is a hugely underreported, underestimated risk.How about RealClimate attempts to model exactly what would happen to other tipping points, such as the melting permafrost, if indeed a huge increase in the melting of the methal hydrate
ice WERE to occur within the next 50 years.My amateur guess is that the huge, albeit temporary, increase in methane over even three or four decades might push other relevent tipping points to arrive much, much, sooner than they normally would, thereby vastly incresing negative feedback mechanisms.We KNOW that quick, huge, changes occured in the Earth's climate in the past.See other relevent posts in the past from Realclimate.Climate often does not change slowly, but undergoes huge, quick, changes periodically, due to negative feedbacks accumulating, and tipping the climate to a quick change.Why should the danger from huge potential methane releases be vievwed
with any less trepidation?
Quantities such as tree ring widths, coral growth, isotope variations in
ice cores, ocean and lake sediments, cave
deposits, fossils,
ice cores, borehole temperatures, and glacier length records are correlated
with climatic fluctuations.
The latter events left behind distinctive rock - sequences typically consisting of tillites (ancient boulder - clay, now solid rock) representing
ice -
deposited debris, overlain
with a depositional break by cap - carbonates, chemical sediments of marine origin
deposited during interglacials following global sea - level rises.
Apply a plastic bag filled
with ice until the
deposit is brittle enough to crumble off.
Chunks of
ice deposited by the neighbouring glacier swirl across the otherwise untouched lake and provide cabin colonists
with an organic view of the water and craggy peaks beyond
with just the mustard shelter for company.