Skip to main content
×
Home
    • Aa
    • Aa

Variable penetration depth of interferometric synthetic aperture radar signals on Alaska glaciers: a cold surface layer hypothesis

  • Alessio Gusmeroli (a1), Anthony Arendt (a2), Donald Atwood (a2), Bert Kampes (a3), Mark Sanford (a3) and Joanna C. Young (a2)...
Abstract
Abstract

P-band interferometric synthetic aperture radar (InSAR) data at 5 m resolution from Kahiltna Glacier, the largest glacier in the Alaska Range, Alaska, USA, show pronounced spatial variation in penetration depth, δP. We obtained δP by differencing X- and P-band digital elevation models. δP varied significantly over the glacier, but it was possible to distinguish representative zones. In the accumulation area, δP decreased with decreasing elevation from 18 ± 3 m in the percolation zone to 10 ± 4 m in the wet snow zone. In the central portion of the ablation area, a location free of debris and crevasses, we identified a zone of very high δP (34 ± 4 m) which decreased at lower elevations (23 ± 3 m in bare ice and 5-10m in debris-covered ice). We observe that the spatial configuration of δP is consistent with the expected thermal regime of each zone: δP is high in areas where cold firn/ice likely occurs (i.e. percolation zone and upper ablation area) and low in areas where temperate surface firn/ice likely exists (wet snow zone and lower ablation area). We suggest that the very high δP observed in the upper ablation area is due to the presence of a cold surface layer.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Variable penetration depth of interferometric synthetic aperture radar signals on Alaska glaciers: a cold surface layer hypothesis
      Available formats
      ×
      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about sending content to Dropbox.

      Variable penetration depth of interferometric synthetic aperture radar signals on Alaska glaciers: a cold surface layer hypothesis
      Available formats
      ×
      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about sending content to Google Drive.

      Variable penetration depth of interferometric synthetic aperture radar signals on Alaska glaciers: a cold surface layer hypothesis
      Available formats
      ×
Copyright
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

DK Atwood , F Meyer and A Arendt (2010) Using L-band SAR coherence to delineate glacier extent. Can. J. Remote Sens., 36(1), 186195 (doi: 10.5589/m10-014)

RA Bindschadler and PL Vornberger (1992) Interpretation of SAR imagery of the Greenland ice sheet using coregistered TM imagery. Remote Sens. Environ., 42(3), 167175 (doi: 10.1016/0034-4257(92)90100-X)

H Björnsson and 6 others (1996) The thermal regime of sub-polar glaciers mapped by multi-frequency radio-echo sounding. J. Glaciol., 42(140), 2332

S Campbell and 7 others (2012) Melt regimes, stratigraphy, flow dynamics and glaciochemistry of three glaciers in the Alaska Range. J. Glaciol., 58(207), 99109 (doi: 10.3189/2012JoG10J238)

CH Davis and VI Poznyak (1993) The depth of penetration in Antarctic firn at 10 GHz. IEEE Trans. Geosci. Remote Sens., 31(5), 11071111 (doi: 10.1109/36.263784)

M Fahnestock , R Bindschadler , R Kwok and K Jezek (1993) Greenland ice sheet surface properties and ice dynamics from ERS-1 SAR imagery. Science, 262(5139), 15301534 (doi: 10.1126/science.262.5139.1530)

A Gusmeroli , T Murray , P Jansson , R Pettersson , A Aschwanden and AD Booth (2010) Vertical distribution of water within the polythermal Storglaciären, Sweden. J. Geophys. Res., 115(F4), F04002 (doi: 10.1029/2009JF001539)

A Gusmeroli , P Jansson , R Pettersson and T Murray (2012) Twenty years of cold surface layer thinning at Storglaciären, sub-Arctic Sweden, 1989–2009. J. Glaciol., 58(207), 310 (doi: 10.3189/2012JoG11J018)

DK Hall , RS Williams Jr, JS Barton , LC Smith and JB Garvin (2000) Evaluation of remote-sensing techniques to measure decadal-scale changes of Hofsjökull ice cap, Iceland. J. Glaciol., 46(154), 375388 (doi: 10.3189/172756500781833061)

KC Jezek , P Gogineni and M Shanableh (1994) Radar measurements of melt zones on the Greenland ice sheet. Geophys. Res. Lett., 21(1), 3336 (doi: 10.1029/93GL03377)

I Joughin , D Winebrenner , M Fahnestock , R Kwok and W Krabill (1996) Measurement of ice-sheet topography using satellite-radar interferometry. J. Glaciol., 42(140), 1022

M König , J Wadham , JG Winther , J Kohler and AM Nuttall (2002) Detection of superimposed ice on the glaciers Kongsvegen and midre Lovénbreen, Svalbard, using SAR satellite imagery. Ann. Glaciol., 34, 335342 (doi: 10.3189/172756402781817617)

K Langley and 6 others (2008) From glacier facies to SAR backscatter zones via GPR. IEEE Trans. Geosci. Remote Sens., 46(9), 25062516 (doi: 10.1109/TGRS.2008.918648)

JC Moore and 8 others (1999) High-resolution hydrothermal structure of Hansbreen, Spitsbergen, mapped by ground-penetrating radar. J. Glaciol., 45(151), 524532

T Murray and 6 others (2000) Glacier surge propagation by thermal evolution at the bed. J. Geophys. Res., 105(B6), 13 49113 507 (doi: 10.1029/2000JB900066)

FJ Navarro and 6 others (2009) Radioglaciological studies on Hurd Peninsula glaciers, Livingston Island, Antarctica. Ann. Glaciol., 50(51), 1724 (doi: 10.3189/172756409789097603)

WSB Paterson (1972) Temperature distribution in the upper layers of the ablation area of Athabasca Glacier, Alberta, Canada. J. Glaciol., 11(61), 3141

R Pettersson , P Jansson and P Holmlund (2003) Cold surface layer thinning on Storglaciären, Sweden, observed by repeated ground penetrating radar surveys. J. Geophys. Res., 108(F1), 6004 (doi: 10.1029/2003JF000024)

R Pettersson , P Jansson and H Blatter (2004) Spatial variability in water content at the cold–temperate transition surface of the polythermal Storglaciären, Sweden. J. Geophys. Res., 109(F2), F02009 (doi: 10.1029/2003JF000110)

E Rignot , R Forster and B Isacks (1996) Interferometric radar observations of Glaciar San Rafael, Chile. J. Glaciol., 42(141), 279291

E Rignot , K Echelmeyer and W Krabill (2001) Penetration depth of interferometric synthetic-aperture radar signals in snow and ice. Geophys. Res. Lett., 28(18), 35013504 (doi: 10.1029/2000GL012484)

GdeQ Robin (1975) Velocity of radio waves in ice by means of a bore-hole interferometric technique. J. Glaciol., 15(73), 151159

H Rott , K Sturm and H Miller (1993) Active and passive microwave signatures of Antarctic firn by means of field measurements and satellite data. Ann. Glaciol., 17, 337343

GJ Wolken , M Sharp and L Wang (2009) Snow and ice facies variability and ice layer formation on Canadian Arctic ice caps, 1999–2005. J. Geophys. Res., 114(F3), F03011 (doi: 10.1029/2008JF001173)

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 6 *
Loading metrics...

Abstract views

Total abstract views: 7 *
Loading metrics...

* Views captured on Cambridge Core between 26th July 2017 - 19th September 2017. This data will be updated every 24 hours.