Geophysical studies in the Arctic Ocean

Crary, A. P.; Goldstein, N.E.

doi:10.1016/0146-6313(56)90049-1

Cited by 21 publications

(10 citation statements)

References 3 publications

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“…However, -12-from previous work it seems reasonable to assume such a layer with an average velocity of 2 km/sec for depths on the order of 0. 5 km (Crary and Goldstein, 1957;Nafe and Drake, 1957). All structural interpretations apply to the area immediately below the receiver.…”

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confidence: 99%

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Seismic Studies of the Arctic Ocean Floor

Hunkins¹

1960

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confidence: 99%

“…The type T records show that bottom texture is rougher in the eastern area. The M reflection in the eastern area probably corresponds to the "second reflection'' observed by Crary and Goldstein (1957) In making the interpretations, straight line ray paths were assumed. Also assumed was an upper layer with a velocity of 2 km/sec.…”

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confidence: 99%

Seismic Studies of the Arctic Ocean Floor

Hunkins¹

1960

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“…The earliest quantitative observations of surface waves in sea ice were made in the Arctic Ocean using gravimeters [e.g., Crary et al, 1952;Crary and Goldstein, 1957]. Since this time, a considerable variety of techniques have been used to observe waves in sea ice including ship-borne wave recorders [Robin, 1963], seismometers [Hunkins, 1962;Sytinskiy and Tripol'nikov, 1964;Stein et al, 1998;Marsan et al, 2012], tiltmeters [Smirnov and Savchenko, 1977;, strainmeters [Squire, 1978], airborne laser profiling [Wadhams, 1975], upward looking sonars on submarines or moorings [Wadhams, 1978;Fissel et al, 2002;Marko, 2003], accelerometers deployed on ice floes or buoys [Wadhams et al, 1988;Wadhams and Doble, 2009], synthetic aperture radar (SAR) [Wadhams and Holt, 1991;Liu et al, 1992], and Global Positioning System measurements [Downer and Haskell, 2001;Doble and Wadhams, 2006].…”

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Measurement and imaging of infragravity waves in sea ice using InSAR

Mahoney

Dammann

Johnson

et al. 2016

Geophysical Research Letters

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Using short‐temporal baseline interferometric synthetic aperture radar, we capture instantaneous images of a persistent field of infragravity waves propagating through sea ice near Barrow, Alaska, during January 2015. We estimate wave amplitudes to be between 1.2 and 1.8 mm. Curvature of wavefronts is consistent with refraction of waves entering shallow water from a source region north of Barrow. A shallow water wave model indicates that the geometry of the wavefronts is relatively insensitive to the source location, but other evidence suggests the waves may have originated in the North Atlantic, making this perhaps the longest observed propagation path for waves through ice. We also note that steepening of the waves entering shallow water can increase the peak strain by an order of magnitude, suggesting that infragravity waves may play a role in determining the location of the landfast ice edge with respect to water depth.

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“…The equation of fluctuations for the ice plate deflection at the ice-water interface is defined by the balance of inertia forces, internal forces of the ice plate elasticity, hydrodynamic pressure on the lower ice surface and external impact. The hydrodynamic pressure onto the lower sea ice surface is defined by the recovering gravitational force and hydrodynamic disturbances of water masses [4,6,8,11,12]. In the linear approximation, we succeed in getting the expression for calculating the sea ice thickness, if frequencies of resonance waves and elastic-gravity fluctuation of the sea ice surface are known [1,6,12].…”

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Climate tendencies of changes in multiyear sea ice thickness in the Arctic Basin (1970–2005)

Nagurnyi

2009

Russ. Meteorol. Hydrol.

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The area integral of the sea ice thickness in the Arctic Basin is estimated from the measurements of sea ice surface fluctuations at drift-ice stations. The 1970-1990 linear trend is indicative of an approximately 10-cm reduction in the average sea ice thickness over the entire Arctic Basin, which makes 3% of the average ice thickness (about 3 m). Seasonal changes made 40 cm. The amplitude of variations of the average ice thickness in that period is 20 cm with a period of changes of approximately 6-8 years. The observations were interrupted during 1991-2003 and then resumed in 2004. During 1990-2005, the old ice thickness over the entire Arctic Basin decreased, on average, by 110 cm.

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Geophysical studies in the Arctic Ocean

Cited by 21 publications

References 3 publications

Seismic Studies of the Arctic Ocean Floor

Seismic Studies of the Arctic Ocean Floor

Measurement and imaging of infragravity waves in sea ice using InSAR

Climate tendencies of changes in multiyear sea ice thickness in the Arctic Basin (1970–2005)

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