Surface roughness characterizations of sea ice and ice sheets: case studies with MISR data
Tóm tắt
This work is an examination of potential uses of multiangular remote sensing imagery for mapping and characterizing sea ice and ice sheet surfaces based on surface roughness properties. We use data from the Multi-angle Imaging SpectroRadiometer (MISR) to demonstrate that ice sheet and sea ice surfaces have characteristic angular signatures and that these angular signatures may be used in much the same way as spectral signatures are used in multispectral classification. Three case studies are examined: sea ice in the Beaufort Sea off the north coast of Alaska, the Jakobshavn Glacier on the western edge of the Greenland ice sheet, and a region in Antarctica south of McMurdo station containing glaciers and blue-ice areas. The MISR sea ice image appears to delineate different first-year ice types and, to some extent, the transition from first-year to multiyear ice. The MISR image shows good agreement with sea ice types that are evident in concurrent synthetic aperture radar (SAR) imagery and ice analysis charts from the National Ice Center. Over the Jakobshavn Glacier, surface roughness data from airborne laser altimeter transects correlate well with MISR-derived estimates of surface roughness. In Antarctica, ablation-related blue-ice areas, which are difficult to distinguish from bare ice exposed by crevasses, are easily detected using multiangular data.
Từ khóa
#Rough surfaces #Surface roughness #Sea surface #Ice surface #Sea ice #Antarctica #Surface emitting lasers #Remote sensing #Spectroradiometers #Synthetic aperture radarTài liệu tham khảo
10.1029/96JD01801
schytt, 1961, glaciology ii. blue ice-fields, moraine features, and glacier fluctuations, Norwegian– British– Swedish Antarctic Expedition 1949– 1952 Scientific Results, 4e, 183
10.1029/2000GL012052
10.1029/2001JD900067
10.1029/1999JD901049
ohmura, 1991, new precipitation and accumulation maps for greenland, J Glaciol, 37, 140, 10.1017/S0022143000042891
10.3189/172756400781820787
10.1029/95GL02069
10.1126/science.283.5407.1522
10.1175/1520-0442(1997)010<0165:SOTGIS>2.0.CO;2
10.1080/01431169408954149
10.1029/94JC01911
gurney, 1993, Atlas of Satellite Observations Related to Global Change, 470
10.1080/02757250009532394
10.1175/1520-0477(1999)080<2209:NDIEOS>2.0.CO;2
10.1029/1999GL010863
10.1007/978-3-642-60282-5_10
comiso, 1996, surface and radiative characteristics of the summer arctic sea ice cover from multi-sensor satellite observations, J Geophys Res, 101, 28 397, 10.1029/96JC02816
10.1080/07038992.2001.10854887
10.1007/978-3-642-60282-5_11
10.1029/91JC02652
onstott, 1992, sar and scatterometer signatures of sea ice, Microwave Remote Sensing of Sea Ice, 73, 10.1029/GM068p0073
dozier, 1987, snow mapping and classification from landsat thematic mapper data, Ann Glaciol, 9, 97, 10.1017/S026030550000046X
10.1016/S0034-4257(00)00111-5
zhao, 2000, cloud detection with the mulitangle imaging spectroradiometer (misr), EOS Trans, agu 81
10.3189/172756501781832106
10.1029/95GL00264
joughin, 1996, measurement of ice-sheet topography using satellite radar interferometry, J Glaciol, 42, 10, 10.1017/S0022143000030483
10.1029/1999RG900007
10.1126/science.276.5314.934
10.1002/ima.1850030206
10.1038/352033a0
10.1175/1520-0477(1993)074<0033:RVOSIA>2.0.CO;2
10.1029/96GL04021
10.1029/96GL01426
10.1126/science.278.5340.1104
10.1029/2001GL012967
herzfeld, 1999, glacier roughness surveys of jakobshavn isbrae drainage basin, west greenland, and morphological characterization, Zeitschrift Gletscherkunde Glazioalgeol, 35, 117
10.1109/IGARSS.1999.773514
pfeffer, 1987, the effect of crevasses on the solar heating of a glacier surface, Proc IAHS Vancouver Symp Physical Basis Ice Sheet Model, 191
10.1029/98JE01898
10.1007/978-3-642-60282-5
10.1029/RG020i001p00067
10.1029/91JC02652
10.1126/science.262.5139.1525
bintanja, 1995, the climate sensitivity of antarctic blue-ice areas, Ann Glaciol, 21, 157, 10.1017/S0260305500015755
orheim, 1990, investigating climate change by digital analysis of blue ice extent on satellite images of antarctica, Ann Glaciol, 14, 211, 10.1017/S0260305500008600
duda, 1973, Pattern Classification and Scene Analysis, 482
10.3189/172756501781832386
yoshida, 1971, discovery of meteorites near yamoto mountains, east antarctica, Antarctic Rec, 39, 62
10.3189/172756501781832557
mellor, 1989, Airfields on Antarctic glacier ice
10.1111/j.1945-5100.1992.tb01073.x