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On top of mendenhall glacier

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    On top of mendenhall glacier

    flying over the Glacier and landing on it, another wonderfull journey










    past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

    #2
    Re: On top of mendenhall glacier

    did you notice the helicopter ahead on previous photos ? it was quite misty as we were so high up. now the walkabout in our spiked boots !!!!








    past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

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      #3
      Re: On top of mendenhall glacier







      ]

      past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

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        #4
        Re: On top of mendenhall glacier



        return journey back to Juneau









        runway

        past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

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          #5
          Re: On top of mendenhall glacier

          It is surprising to see the amount of black soot that is already evident on this glacier at such an early time of the year.

          This is in an area without much locally produced pollution and no recent volcanic eruption in the vicinity, or directly "down wind". It can thus be assumed that the soot originates from places other than Alaska and is spread widely, incl. over the Greenland inland ice and even Antarctica.

          I have noticed this phenomena in Norway, although I'm not there all the time. (Or maybe just because I'm not?)

          In another thread we had a bit of a discussion about what was used to blacken the snow to clear roads across the mountains in Geiranger, Norway, in the old days, soot or manure.

          Regardless of which, the point was that blackening the snow would speed up the melting process in the specific area of the road and leave the rest "untouched".

          That also applies to this and other glaciers. With the top surface already blackened in the spring, the melting during summer will be faster and the shrinking of the glaciers over years will accelerate.

          This has nothing to do with greenhouse gases or global warming. It is particle pollution, mainly from coal and oil burning (and possibly from clearing of forest and volcanic eruptions), in countries far away from the glaciers, which is transported around the earth by the prevailing wind and the jet streams.

          This is nothing new, (there is even a name for it, which slips my mind) but the early occurrence is what appears to be new.

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            #6
            Re: On top of mendenhall glacier

            hi ombugge, Our Guide never mention anything about black soot, if you look at a close up of the grey mountains next to the ice flow, it is like volcanic dust and fine rocks. The way the gacier forms and travels she said drags the rocks and breaks it up looking like fine dust in places and it travels down the mountain. She also explaines the rounded top mountains were at one time covered with ice so smoothed out. The pointed ones were above the ice. travelling from Whittier to Anchorage on the bus we wondered why the water was so dark although huge icebergs were around, and the driver explained it was the silt from the glaciers , so you wouldn't find any fish life here.

            past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

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              #7
              Re: On top of mendenhall glacier

              There are two different kinds of “black stuff” being mentioned here kikki. Your guide described how the glaciers erode and break up the local rocks, forming what is called moraine. It is seen at the sides of the glacier in your photos. Whereas the soot ombugge mentions is not formed by glacial action at all but is pollution particles produced elsewhere, carried by winds and eventually deposited from the atmosphere …this deposition can be widespread, but it is noticeable against the white expanse of glaciers. But there, as ombugge describes, it is having an effect on their melting. I have read that currently this is especially the case in the Himalayas.

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                #8
                Re: On top of mendenhall glacier

                hi cecelia, thanks for that, we were also told there is a lot less snow falling in some areas and many glaciers receding, the crew said they have noticed it much warmer when they start the first alaska cruise than many years ago.

                past cruises 2000 ncl crown odessey mediterranean 2006 ncl marco polo baltic 2007 ncl marco polo mediterranean... june 2010 pacific princess, mediterranean . may 2011 island princess alaska . june 2015 NCL Star Norwegian Fjords

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