polar remote sensing
DESCRIPTION
Polar Remote Sensing. Presented by Beth Caissie. Remote Sensing. Observing something without being able to physically “see” or touch it. http://www.blogut.ca/2007/09/. http://www.space.gc.ca/asc/eng/industry/esa_canada.asp. Muir Glacier. 1941, William Field 2004, Bruce Molnia - PowerPoint PPT PresentationTRANSCRIPT
1
Polar Remote SensingPolar Remote Sensing
Presented by Beth CaissiePresented by Beth Caissie
2
Remote Sensing• Observing something without
being able to physically “see” or touch it
http://www.space.gc.ca/asc/eng/industry/esa_canada.asp
http://www.blogut.ca/2007/09/
3
Muir Glacier
1941, William Field
2004, Bruce Molnia
http://nsidc.org/data/glacier_photo/repeat_photography.html
From the Glacier photograph collection. Boulder, Colorado USA: National Snow and Ice Data Center/World Data Center for Glaciology.
4
1909, Ulysses Sherman Grant
McCarty Glacier
2004, Bruce Molnia
From the Glacier photograph collection. Boulder, Colorado USA: National Snow and Ice Data Center/World Data Center for Glaciology.
http://nsidc.org/data/glacier_photo/repeat_photography.html
5
Geostationary Satellite
Maintains its position over a particular location as the Earth rotates beneath it
6
Polar Orbiting Satellites
Near Polar Orbiting• Each satellite
passes near the poles ~14 times daily
• Multiple satellites: each location on Earth is imaged 4 times per day
• Polar regions are imaged much more often
7
Daily Landsat tracks across
Antarctica
8
Polar Remote Sensing via satellites• Glaciers• Snow Cover• Lake Ice • Sea Ice• Permafrost• Productivity• Surface
temperature• Volcanoes• Aurora Activity• And more…
Historic calving front locations (in grey), 1851 through 1964, compiled by Anker Weidick and Ole Bennike. Recent calving front locations (in color), 2001 through 2006, derived from Landsat satellite imagery.
Jakobshavn Glacier, Greenland
NASA/Goddard Space Flight Center Scientific Visualization Studio NASA/Goddard Space Flight Center Scientific Visualization Studio http://svs.gsfc.nasa.gov/vis/a000000/a003300/a003395/index.htmlhttp://svs.gsfc.nasa.gov/vis/a000000/a003300/a003395/index.html
9Data derived from Sea Ice Index data set. Credit: National Snow and Ice Data Center. http://nsidc.org/news/press/2007_seaiceminimum/images/20070917animation.mov
1979-2006 September 9, 2007
Arctic Summer Sea-Ice Extent
10
Arctic Summer Sea-Ice Extent
http://www.nsidc.org/arcticseaicenews/
SSM/I Data:
• Special Sensor Microwave/ Imager, operated by the Defense Meteorological Satellite Program
• Not affected by clouds!
• Near polar orbiting satellite
• Continuous record since 1979
• Very coarse resolution:
• 25 x 25 km grid
white > 15% ice coverage
11
Sensing primary productivity
Alaska
Russia
Quicktime movie compiled by Karen Frey, Clark University
12
Greenland Ice Sheet Temperature and Sea Ice
NASA/Goddard Space Flight Center Scientific Visualization Studio. The Next Generation Blue Marble data is courtesy of Reto Stockli (NASA/GSFC). http://svs.gsfc.nasa.gov/vis/a000000/a003500/a003506/index.html
13
Volcanic Activity
March 15, 2009: Mt Redoubt erupts in Alaska (100 mi south of Anchorage)
Image by Kelly Reeves, courtesy of Alaska Airlines http://www.avo.alaska.edu/activity/Redoubt.php
Image by Cheryl Cameron, courtesy of AVO/ADGGS
14http://geology.com/nasa/redoubt-ash-plume-satellite-images/
MODIS image used to track Mt Redoubt’s ash plume
Colors are actually derived from thermal infared measurements.White = colder (The plume is white because it is so high—50,000’)