1 / 17

using instrumented aircraft to bridge the observational gap between ICESat and ICESat-2

Operation IceBridge. using instrumented aircraft to bridge the observational gap between ICESat and ICESat-2. Image: M. Studinger. New Suborbital Mission: Operation IceBridge. Science Requirements.

blade
Download Presentation

using instrumented aircraft to bridge the observational gap between ICESat and ICESat-2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Operation IceBridge using instrumented aircraftto bridge the observational gapbetween ICESat and ICESat-2 Image: M. Studinger

  2. New Suborbital Mission: Operation IceBridge

  3. Science Requirements IceBridge shall make altimetry measurements that enable determination of surface elevation change to an uncertainty of 10 cm/yr over outlet glaciers of the Greenland and Antarctic ice sheets. IceBridge shall make measurements that enable determination of surface slopes to an uncertainty of 0.5°. IceBridge shall fly at least 250,000 total km per year, with 30,000 km per year specifically along ICESat tracks over sea ice and land ice. IceBridge shall fly at least 500 km per year as underflights along CryoSat-2 tracks over sea ice and land ice. IceBridge shall, for at least two field seasons, make altimetry measurements along a swath of the southern limit of the ICESat tracks, enabling direct comparisons of surface elevations for a large number of ICESat tracks. IceBridge shall make repeat altimetry measurements that enable determination of surface elevations, and surface elevation change, in critical areas where ICESat data are limited or non-existent, including: coastal Greenland, Antarctica’s Pine Island, Thwaites and Crane Glaciers, Amundsen Coast, Antarctic Peninsula, accessible areas of East Antarctica, accessible areas of the South Pole region not surveyed by ICESat

  4. Science Requirements IceBridge shall make radar measurements that enable mapping and characterization of the bedrock beneath land-based ice as follows: For Greenland: in consideration of existing data, to establish a 100 km by 100 km grid and provide 10 km by 10 km grids over five major outlet glacier catchments. For Antarctica, provide mapping over accessible outlet glaciers that improve numerical models of ice sheet flow according to the priorities in #6. IceBridge shall make gravity measurements that enable the determination of bathymetry beneath ice shelves and sub-ice-sheet bedrock topography that cannot be mapped with radar for five key outlet glaciers in Greenland and accessible portions of Antarctica according to the priorities in #6. IceBridge shall conduct flight experiments that enable the inter-calibration of the flight instruments and the characterization of their errors. IceBridge shall in conjunction with altimetry measurements make measurements to determine the thickness and structure of the snow and firn layer.

  5. Instrument Suite IceBridge exploits airborne platforms when making altimetry measurements to make other critical measurements to understanding change in polar ice sheets UAF: laser scanner ;UTIG/ICECAP: depth sounder, point laser, photon counter, grav + mag

  6. Modes of Operation = impossible = low resolution data = possible

  7. largest external structureever flown on a P-3 • designed, built, and installedin only 3 months

  8. fairing for radar antennas on NASA DC-8

  9. CReSIS Radar Sensors IceBridge Radar Sensors

  10. Instrument Specs * source: presentation by B. Krabill at Seattle workshop July 2010 † source: presentation by B. Blair at Seattle workshop July 2010 ¶ source: presentation by J. Arvesen at Seattle workshop July 2010 DMS-derived DEM ATM-derived DEM

  11. Backup Slides

  12. Layer Extraction Snow Radar Parametric spectral estimation techniques are used to identify and track the two most prominent spectral component. Top Image: Spectral estimation using FFT. Bottom Image: Parametric spectral estimation.

  13. Antarctica 2009 – Pine Island Glacier Snow Radar Ku-Band

  14. Snow Radar description

  15. Ku-band altimeter description

More Related