Announcement

Collapse

Natural Science 301 Guidelines

This is an open forum area for all members for discussions on all issues of science and origins. This area will and does get volatile at times, but we ask that it be kept to a dull roar, and moderators will intervene to keep the peace if necessary. This means obvious trolling and flaming that becomes a problem will be dealt with, and you might find yourself in the doghouse.

As usual, Tweb rules apply. If you haven't read them now would be a good time.

Forum Rules: Here
See more
See less

Robot Sub Finds Surprisingly Thick Antarctic Sea Ice

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • shunyadragon
    replied
    Also note the reference in your own source highlighted;

    Source: http://www.msn.com/en-us/news/techno...ice/ar-BBfC446
    Antarctica's ice paradox has yet another puzzling layer. Not only is the amount of sea ice increasing each year, but an underwater robot now shows the ice is also much thicker than was previously thought, a new study reports.

    The discovery adds to the ongoing mystery of Antarctica's expanding sea ice. According to climate models, the region's sea ice should be shrinking each year because of global warming. Instead, satellite observations show the ice is expanding, and the continent's sea ice has set new records for the past three winters. At the same time, Antarctica's ice sheet (the glacial ice on land) is melting and retreating.
    The findings were published today (Nov. 24) in the journal Nature Geoscience.

    This likely due to rising air temperatures due to climate change as in the other source I cited.

    Further review of more literature on the subject concludes that the sentence at the beginning of the second paragraph [italics] is an msn editorial remark and not from the original research article, and other articles as;

    http://cnews.canoe.ca/CNEWS/Science/.../22093036.html.
    Last edited by shunyadragon; 11-24-2014, 05:19 PM.

    Leave a comment:


  • shunyadragon
    replied
    This source explains some of the impacts of rising air temperatures due to climate change.


    Source: http://www.sciencedaily.com/releases/2014/09/140914211024.htm



    Increased snowfall will not prevent the continued melting of glaciers in the northern Antarctic Peninsula, according to new research published in the journal Nature Climate Change.

    An international team of researchers, led by Dr Bethan Davies, from Royal Holloway, University of London, has discovered that small glaciers that end on land around the Antarctic Peninsula are highly vulnerable to slight changes in air temperature and may be at risk of disappearing within 200 years.

    Temperatures are currently rising rapidly in the Antarctic Peninsula. Because warmer air holds more moisture, the amount of snowfall has also increased. Some researchers have suggested that this may offset the melting of the glaciers, however this study found that just a small rise in air temperature increased melting so much that even large amounts of extra snowfall could not prevent glacier recession.

    "These small glaciers around the edge of the Antarctic Peninsula are likely to contribute most to rising sea levels over the coming decades, because they can respond quickly to climate change," said Dr Davies, from the Department of Geography at Royal Holloway. "This study is the first to show how glaciers in this vulnerable region are likely to respond to climate change in future. Our findings demonstrate that the melting will increase greatly even with a slight rise in temperature, offsetting any benefits from increased snowfall."

    The researchers carried out extensive fieldwork on James Ross Island, northern Antarctic Peninsula, to map and analyse the changes to a glacier, which is currently 4km long, over the past 10,000 years. They used a combination of glacier and climate modelling, glacial geology and ice-core data.

    Dr Davies added: "Geological evidence from previous studies suggests that the glacier grew by 10km within the last 5,000 years, before shrinking back to its current position. It was argued that this occurred during a warmer but wetter period, suggesting that increased precipitation in the future would offset the melting of the glaciers. However, our study shows that this growth occurred during the colder 'Little Ice Age', reaching its largest size just 300 years ago."

    Researcher Dr Nicholas Golledge, from Victoria University of Wellington, in New Zealand, said: "This glacier, though small, is typical of many of the small glaciers that end on land around the Antarctic Peninsula. This research is important, because it helps reduce some of the uncertainties about how these glaciers will react to changing temperature and precipitation over the next two centuries."

    Professor Neil Glasser, from Aberystwyth University, added: "We found that this glacier remained roughly the same size for thousands of years until it started to grow again 1,500 years ago. However, it is now melting faster than anything seen before, and over the next 200 years will become far smaller than at any point over the last 10,000 years. This unprecedented glacier recession, in response to climate change, will result in significant contributions to sea level rise from this and similar Antarctic Peninsula mountain glaciers and ice caps."

    © Copyright Original Source



    Journal Reference:
    1.Bethan J. Davies, Nicholas R. Golledge, Neil F. Glasser, Jonathan L. Carrivick, Stefan R. M. Ligtenberg, Nicholas E. Barrand, Michiel R. van den Broeke, Michael J. Hambrey, John L. Smellie. Modelled glacier response to centennial temperature and precipitation trends on the Antarctic Peninsula. Nature Climate Change, 2014; DOI: 10.1038/nclimate2369

    University of Royal Holloway London. "Glaciers in northern Antarctic Peninsula melting faster than ever despite increased snowfall." ScienceDaily. ScienceDaily, 14 September 2014. <www.sciencedaily.com/releases/2014/09/140914211024.htm>.

    Leave a comment:


  • shunyadragon
    replied
    Originally posted by Bill the Cat View Post
    Source: http://www.msn.com/en-us/news/technology/robot-sub-finds-surprisingly-thick-antarctic-sea-ice/ar-BBfC446

    Antarctica's ice paradox has yet another puzzling layer. Not only is the amount of sea ice increasing each year, but an underwater robot now shows the ice is also much thicker than was previously thought, a new study reports.

    The discovery adds to the ongoing mystery of Antarctica's expanding sea ice. According to climate models, the region's sea ice should be shrinking each year because of global warming. Instead, satellite observations show the ice is expanding, and the continent's sea ice has set new records for the past three winters. At the same time, Antarctica's ice sheet (the glacial ice on land) is melting and retreating.

    The findings were published today (Nov. 24) in the journal Nature Geoscience.

    © Copyright Original Source

    I seriously question this conclusion; 'According to climate models, the region's sea ice should be shrinking each year because of global warming.' The Antarctica's climate is to a certain extent isolated by circular current around the main ice and land mass, and I do not believe that all climate models make this prediction in short term climate change. I will check some sources and be back.

    I do know that certain areas of the Antarctica ice sheets and glaciers are melting faster then ever recorded in history. Checking sources.
    Last edited by shunyadragon; 11-24-2014, 04:45 PM.

    Leave a comment:


  • pancreasman
    replied
    Or, maybe, climate is a complex system with multiple factors:

    here

    and here

    Leave a comment:


  • Truthseeker
    replied
    Why should people be puzzled? The theory of anthropogenic global warming has not gained empirical ground for many years now.

    Leave a comment:


  • Cow Poke
    replied

    Leave a comment:


  • Robot Sub Finds Surprisingly Thick Antarctic Sea Ice

    Source: http://www.msn.com/en-us/news/technology/robot-sub-finds-surprisingly-thick-antarctic-sea-ice/ar-BBfC446

    Antarctica's ice paradox has yet another puzzling layer. Not only is the amount of sea ice increasing each year, but an underwater robot now shows the ice is also much thicker than was previously thought, a new study reports.

    The discovery adds to the ongoing mystery of Antarctica's expanding sea ice. According to climate models, the region's sea ice should be shrinking each year because of global warming. Instead, satellite observations show the ice is expanding, and the continent's sea ice has set new records for the past three winters. At the same time, Antarctica's ice sheet (the glacial ice on land) is melting and retreating.

    The findings were published today (Nov. 24) in the journal Nature Geoscience.

    © Copyright Original Source

Related Threads

Collapse

Topics Statistics Last Post
Started by Hypatia_Alexandria, 03-18-2024, 12:15 PM
48 responses
136 views
0 likes
Last Post Sparko
by Sparko
 
Started by Sparko, 03-07-2024, 08:52 AM
16 responses
74 views
0 likes
Last Post shunyadragon  
Started by rogue06, 02-28-2024, 11:06 AM
6 responses
48 views
0 likes
Last Post shunyadragon  
Working...
X