scholarly journals Multitemporal SAR Interferometry in the Messolonghi-Etoliko Natura 2000 Overlapping Deltas Area

2015 ◽  
Author(s):  
E. GKARTZOU ◽  
I. Parcharidis ◽  
E. Karymbalis ◽  
MARIA LOUIZA Drakatou
Keyword(s):  
Natura 2000 ◽  
Sar Interferometry

Combining SAR interferometry and the equation of continuity to estimate the three-dimensional glacier surface-velocity vector

1999 ◽  
Vol 45 (151) ◽  
pp. 533-538 ◽  
Author(s):  
Niels Reeh ◽  
Søren Nørvang Madsen ◽  
Johan Jakob Mohr
Keyword(s):  
Steady State ◽  
Mass Balance ◽  
Vertical Velocity ◽  
Velocity Vector ◽  
Thickness Distribution ◽  
Vertical Surface ◽  
Horizontal Velocity ◽  
Sar Interferometry ◽  
Surface Velocity ◽  
Ice Thickness

AbstractUntil now, an assumption of surface-parallel glacier flow has been used to express the vertical velocity component in terms of the horizontal velocity vector, permitting all three velocity components to be determined from synthetic aperture radar interferometry. We discuss this assumption, which neglects the influence of the local mass balance and a possible contribution to the vertical velocity arising if the glacier is not in steady state. We find that the mass-balance contribution to the vertical surface velocity is not always negligible as compared to the surface-slope contribution. Moreover, the vertical velocity contribution arising if the ice sheet is not in steady state can be significant. We apply the principle of mass conservation to derive an equation relating the vertical surface velocity to the horizontal velocity vector. This equation, valid for both steady-state and non-steady-state conditions, depends on the ice-thickness distribution. Replacing the surface-parallel-flow assumption with a correct relationship between the surface velocity components requires knowledge of additional quantities such as surface mass balance or ice thickness.

Fostering Sustainability in European Nature Conservation NATURA 2000 Habitat Monitoring based on Earth Observation Services

2011 ◽  
Author(s):  
Stefan Lang ◽  
Annett Frick ◽  
Birgen Haest ◽  
Oliver Buck ◽  
Jeroen Vanden Borre ◽  
...  
Keyword(s):  
Nature Conservation ◽  
Natura 2000 ◽  
Earth Observation ◽  
Habitat Monitoring

Natura 2000

2011 ◽  
Vol 36 (1) ◽  
pp. 177-178
Author(s):  
Simon Jolivet
Keyword(s):  
Natura 2000

Natura 2000

2014 ◽  
Vol 39 (4) ◽  
pp. 791-793
Author(s):  
Simon Jolivet
Keyword(s):  
Natura 2000

Natura 2000

2001 ◽  
Author(s):  
Martin Gellermann
Keyword(s):  
Natura 2000
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