摘要 :
A dense network of conductivity-temperature-death (CTD) measurements made over the eastern Greenland continental shelf and slope between 81 N and 75 N provided new detail on the water properties and circulation on the shelf and at...
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A dense network of conductivity-temperature-death (CTD) measurements made over the eastern Greenland continental shelf and slope between 81 N and 75 N provided new detail on the water properties and circulation on the shelf and at the adjacent East Greenland Polar Front (EGPF). The EGPF approaches the shelf break rapidly between 80 N and 78 N remaining 20 to 30 km east of it thereafter at least until 75 N. A filament of Atlantic Water (AW) was found close to the eastern side of the front which became generally cooler with decreasing latitude, suggesting that the majority of the contribution of the West Spitzbergen Current to the southward flowing Return Atlantic Current occurs north of 78 N. The portion of the shelf investigated is cut by several troughs generally oriented east-west; two of which are joined by a north-south depression west of Belgica Bank. Dynamic topography, water properties and ice movement suggest an anti-cyclonic surface circulation over this system of troughs and banks with AIW advecting up the troughs from the east. (Author).
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Elavation change measurements from satellite altimetry for the southern Greenland ice sheet (south 70 degrees north) are re-examined after incorporating technical advancements that significantly improve measurement accuracy.
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We have detected a dramatic short-term speedup of the Ryder Glacier, Greenland, using satellite radar interferometry. The accelerated flow represents a substantial, though short-lived, change in the ice discharge from the basin. We use the term.
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In June 1991, the NASA/Jet Propulsion Laboratory airborne SAR (AIRSAR) collected the first calibrated multi-channel SAR observations of the Greenland ice sheet.
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As a component of the Greenland Sea Project, a hydrographic cruise was conductedon board the USNS BARTLETT during August 1990 in the southern Greenland Sea to continue the study of the southern half of the Greenland Gyre (GG) and ...
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As a component of the Greenland Sea Project, a hydrographic cruise was conductedon board the USNS BARTLETT during August 1990 in the southern Greenland Sea to continue the study of the southern half of the Greenland Gyre (GG) and the Jan Mayen Current (JMC) that was begun with the BARTLETT cruise of September 1989, previously reported by Bourke et al. (1989, 1990, 1992) and by Blythe (1990). A total of 44 high-quality CTD stations were occupied to depths of 1000 m. Contrasting with 1989, 21 instead of five of these stations extended to near bottom at depths of 2200 to 3500 m.
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摘要 :
A dense network of conductivity-temperature-death (CTD) measurements made over the eastern Greenland continental shelf and slope between 81 N and 75 N provided new detail on the water properties and circulation on the shelf and at...
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A dense network of conductivity-temperature-death (CTD) measurements made over the eastern Greenland continental shelf and slope between 81 N and 75 N provided new detail on the water properties and circulation on the shelf and at the adjacent East Greenland Polar Front (EGPF). The EGPF approaches the shelf break rapidly between 80 N and 78 N remaining 20 to 30 km east of it thereafter at least until 75 N. A filament of Atlantic Water (AW) was found close to the eastern side of the front which became generally cooler with decreasing latitude, suggesting that the majority of the contribution of the West Spitzbergen Current to the southward flowing Return Atlantic Current occurs north of 78 N. The portion of the shelf investigated is cut by several troughs generally oriented east-west; two of which are joined by a north-south depression west of Belgica Bank. Dynamic topography, water properties and ice movement suggest an anti-cyclonic surface circulation over this system of troughs and banks with AIW advecting up the troughs from the east. (Author).
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摘要 :
We have assembled an 18-year velocity record for Jakobshavn Isbrae, Greenland. From a 1985 speed of approx. 7000 m/yr, the glacier had slowed by approx. 1000 m/ yr in 1992, which coincided with independently observed thickening in...
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We have assembled an 18-year velocity record for Jakobshavn Isbrae, Greenland. From a 1985 speed of approx. 7000 m/yr, the glacier had slowed by approx. 1000 m/ yr in 1992, which coincided with independently observed thickening in the early 1990s . The glacier then sped up by approx. 4000 m/yr between 1997 and 2000, during which time other measurements show rapid thinning . From 2000 to 2003, the glacier s floating ice tongue almost entirely disintegrated, as speed increased to 12,600 m/yr. If the retreat of the ice tongue caused the acceleration, then similar losses of floating ice tongues since the Little Ice Age may explain the current rapid thinning observed for many of Greenland s outlet glaciers.
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摘要 :
Radar Interferometry, ice-penetrating radar profiles, and an elevation model are used to determine the catchment area, rates of ice discharge, and approximate states of balance for three large outlet glaciers in northeast Greenland.
