Topographic change detection analysis of the Lake Hoare region and Canada Glacier in the McMurdo Dry Valleys of Antarctica using.
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1 Topographic change detection analysis of the Lake Hoare region and Canada Glacier in the McMurdo Dry Valleys of Antarctica using terrestrial LiDAR scans Anna Duewiger
2 Welcome to the McMurdo Dry Valleys of Antarctica!
3 LiDAR Light Radar Maps the topography of large areas at high resolution LiDAR. Stratus Areonautics. aero.com/?page_id=106
4 CloudCompare 3 D point cloud processing software Alignment and merge of point clouds of same time period & different scanner position to increase density Alignment of 2 point clouds of same section at different times Tool for change detection analysis /File:CloudCompareV2_logo.gif
5 Levy (2013) Lake Hoare
6 Wet Patches Wet patches on topographic highs aren t associated with streams and have no apparent connectivity to surface waters antarctic salty soil atmosphere mars.html Water Track Water tracks carry a greater amount of solutes than the seasonal streams.
7 Using LiDAR to detect snow patch and 2012 pond changes Levy (2013) Okal (2014).
8 Jan to Dec Jan to Jan
9 Target 1 Target Positions and Area of Interest Target 2 Target 3 Target 4 Target 4 Joe Levy (2013). Joe Levy (2013). Joe Levy (2013).
10 Changes from Jan to Jan Purple star = scanner Black circle = defining rock -0.08
11 Canada Glacier Cliff Levy (2013).
12 Canada Glacier Cliff Jan to Dec Calved Ice
13 Canada Glacier Cliff 1.66 Jan to Jan Calved Ice
14 Andrew Fountain (2012). Canada Glacier Basin
15 Pond and Bowl Nov to Nov
16 0.90 Pond and Bowl Jan to Jan
17 Cliffs Jan to Jan Fountain (2012)
18 Summary Lake Hoare CloudCompare shows ground is sinking, but this is probably due to alignment error Canada Glacier Cliff Calved ice pile is accumulating while lower middle cliff face is receding Upper cliff advancing due to density issues between scans Canada Glacier Basin Pond is accumulating Change in the bowl around the pond isn t consistent Cliffs show a gradient of change, probably due to misalignment
19 Future Work and Applications Continue scanning in future years Aim for consistent targets and more targets on glacier basin Aim for more similar densities in point clouds More photos of the area Aerial photos of the area Glacial change in MDV can serve as analogue to glacial change on Martian glaciers Better understanding of how climate change is affecting remote areas of our world
20 References Andrew Fountain, Marianne Okal, Thomas Nylen, Alia Kahn, Joe Levy B TLS meta data (2012). Arial UAV LiDAR Systems. Coptercraft. uav lidar systems/ Karen Lewis MacClune, Andrew G. Fountain, Jeffery S. Kargel, and Douglas R. MacAyeal Glaciers of the McMurdo dry valleys: Terrestrial analog for Martian polar sublimation j. Geophys. Res. (2003). Kelly Hughes Geochemical processes and climate change evolution of water tracks in the McMurdo Dry Valleys, Antarctica (circa 2013). Joseph Levy, Marianne Okal, Brendan, Kelly, Kathy G 804 Lake Hoare watermarks December 2012 TLS meta data (2013). Joseph S. Levy, Andrew G. Fountain, Michael N. Gooseff, Kathy A. Welch, and W. Berry Lyons, Hypersaline wet patches in Taylor Valley, Antarctica, Geophysical Research Letters 39 (2012). Joseph S. Levy, Andrew G. Fountain, Michael N. Gooseff, Kathy A. Welch, and W. Berry Lyons, Watermarks and permafrost in Taylor Valley, Antarctica: Extensive and shallow groundwater connectivity in a cold desert ecosystem, gsa bulletin (2011). Joseph S. Levy and Andrew G. Fountain, Antarctic Dry Valleys water tracks and permafrost wet patches: Ecosystem and astrobiological implications of water exchange between salts, soils, and the atmosphere in a Mars analog cold desert, Fifth Mars Polar Science Conference, (2011). Marianne Okal B 504 Lake Hoare water tracks, Taylor Valley, Anarctica UNAVCO Inc. (2014). N. Davis Land Forms Created by Cryogenic Action. in (eds.) Permafrost: A Guide to Frozen Ground in Transition". University of Alaska Press. Fairbanks. pp (2001). Van Everdingen, Robert, ed. Multi language glossary of permafrost and related ground ice terms Boulder, CO: National Snow and Ice Data Center/World Data Center for Glaciology (1998).
21 Image Citations Slide 2: Slide 3: LiDAR. Stratus Areonautics. aero.com/?page_id=106 Slide 3: Slide 4: Slide 5: Joseph Levy, Marianne Okal, Brendan, Kelly, Kathy G 804 Lake Hoare watermarks December 2012 TLS meta data (2013). Slide 6: 02 antarctic salty soil atmosphere mars.html Slide 6: Slide 7: 02 antarctic salty soil atmosphere mars.html Slide 8:Joseph Levy, Marianne Okal, Brendan, Kelly, Kathy G 804 Lake Hoare watermarks December 2012 TLS meta data (2013). Slide 8: Marianne Okal B 504 Lake Hoare water tracks, Taylor Valley, Anarctica UNAVCO Inc. (2014). Slide 10: Joseph Levy, Marianne Okal, Brendan, Kelly, Kathy G 804 Lake Hoare watermarks December 2012 TLS meta data (2013). Slide 12: Joseph Levy, Marianne Okal, Brendan, Kelly, Kathy G 804 Lake Hoare watermarks December 2012 TLS meta data (2013). Slide 15: Andrew Fountain, Marianne Okal, Thomas Nylen, Alia Kahn, Joe Levy B TLS meta data (2012). Slide 18: Andrew Fountain, Marianne Okal, Thomas Nylen, Alia Kahn, Joe Levy B TLS meta data (2012).
22 Acknowledgements Dr. Andrew Fountain Marianne Okal Dr. Joe Levy Gunnar Johnson The Portland State University REU organizers and program coordinators The National Science Foundation
23 Thank you! Questions?
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