Radioglaciology

Framsida
Springer Science & Business Media, 30 sep. 1985 - 254 sidor
Antarctica, the sixth continent, was discovered more than 160 years ago. Since then this large, mysterious continent of ice and penguins has attracted world interest. Scientific expeditions from various countries have begun to study the geographical and natural conditions of the icy continent. Systematic and comprehensive inves tigations in the Antarctic started in the middle of our century. In 1956 the First Soviet Antarctic Expedition headed to the coast of Antarctica. Their program included studies of the atmosphere, hydrosphere and cryosphere. Thirty years have since passed. Scientists have unveiled many secrets of Antarctica: significant geophysical processes have been investigated, and a large body of new information on the Antarctic weather, Southern Ocean hydrology and Antarctic glaciers has been obtained. We can now claim that the horizons of polar geo physics, oceanology, and particularly glaciology, have expanded. Scientific inves tigators have obtained new information about all Antarctic regions and thus have created the opportunity to use the Antarctic in the interests of mankind.
 

Innehåll

A BRIEF SURVEY OF THE EARTHS ICE COVER AND METHODS FOR ITS INVESTIGATION
1
12 Impact of let on Geophysical Processes
6
13 The Seismic Method
7
14 Gravitational and Magnetic Methods
8
15 Radar Sounding
10
Chapter 1
14
STRUCTURE AND PHYSICAL STATE OF GLACIERS
16
22 Stratification and Temperature Regime of Glaciers
20
46 Radars for Ice Movement Measurements
62
48 Equipment of USA Denmark and Great Britain fur Radar Sounding of Cold Glaciers
64
49 Equipment of USA Denmark and Great Britain for Radar Sounding of Temperate Glaciers
69
410 Specialized Equipment
74
Chapter 4
76
METHODS OF ACQUISITION AND PROCESSING OF DATA
79
SCIENTIFIC RESULTS IN RADIOGLACIOLOGY
84
62 Electromagnetic Wave Speed and its Measurement
93

23 Glacier Regimen
27
Chapter 2
31
ELECTROMAGNETIC WAVE PROPAGATION IN ICE
32
32 The Electrical Properties of Monocrystalline Ice
35
33 Values of the Electrical Parameters
37
34 Pure Polycrystalline Ice
39
35 Impure Polycrystalline Ice
40
37 Propagation of Electromagnetic Waves in Glaciers
41
Chapter 3
47
EQUIPMENT FOR RADAR SOUNDING OF GLACIERS
48
42 Estimation of Sounding Accuracy
52
43 Equipment to Measure the thickness of Cold Glaciers
55
44 Equipment to measure the thickness of temperate glaciers
58
45 Radars to Study Internal Structure and State
59
63 Lateral Waves
116
64 Absorption of Electromagnetic Waves
120
65 Polarization Studies
125
66 Ice Thickness and Subglacial Topography
132
67 Subglacial Physiography and Geology
159
69 Movement of Glaciers
189
610 Nature of the Basal Interface
216
611 Detection of Hidden Crevasses
226
612 Estimation of Glacial Water Content
233
Chapter 6
241
CONCLUSION
250
SUBJECT INDEX
253
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