Is land subsidence increasing the exposure to sea level rise in Alexandria, Egypt?
Article first published online: 18 JUN 2013
©2013. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 40, Issue 12, pages 2953–2957, 28 June 2013
How to Cite
2013), Is land subsidence increasing the exposure to sea level rise in Alexandria, Egypt?, Geophys. Res. Lett., 40, 2953–2957, doi:10.1002/grl.50568., , , , , , , , and (
- Issue published online: 18 JUL 2013
- Article first published online: 18 JUN 2013
- Accepted manuscript online: 17 MAY 2013 10:29AM EST
- Manuscript Accepted: 15 MAY 2013
- Manuscript Revised: 13 MAY 2013
- Manuscript Received: 24 MAR 2013
- French Research National Agency (ANR). Grant Number: ANR-09-CEP-001-01
Additional supporting information may be found in the online version of this article.
|Final_2013GL056052text01.doc||Word document||59K||text01. provides details on the application of the InSAR methods and on the interpretation of the PS data and the evaluation of the uncertainties.|
|Final_2013GL056052fs01.jpg||JPEG image||2496K||provides a lower scale (larger area) than Figure 1 in the manuscript.|
|Final_2013GL056052fs02.jpg||JPEG image||2444K||corresponds to Figure 1 of the manuscript but with an interpolation of the PS line of sight velocities using a standard kriging method with a spherical semi-variogram model and a threshold of 12 nearest sample points to perform the interpolation. The black dots indicate the position of the PS. The confidence in the interpolation results is higher for higher densities of PS. Note that the scale of velocities ranges from -2 mm/year to +2 mm/year, with 78% of the PS velocities within the range [-1.4 mm/year; 0.7 mm/year]. The Figure highlights the relative stability of the city.|
|Final_2013GL056052fs03.jpg||JPEG image||1849K||provides a close-up of Figure S1 nearby the GPS station, showing the persistent scatterers (PS) in the vicinity of that station.|
|Final_2013GL056052fs04.jpg||JPEG image||1435K||provides a close-up of Figure S1 nearby the tide gauge, showing the persistent scatterers (PS) in the vicinity of the tide gauge.|
|Final_2013GL056052fs05.jpg||JPEG image||1072K||SBAS analysis obtained using the 13 most coherent interferograms (covering a period from 2004 to 2010). Although slight phase unwrapping issues can be seen, this processing allowed to observe (1) that there is no large scale subsidence in the historical center of Alexandria and (2) subsidence along the Mariut Lake.|
|Final_2013GL056052fs06.jpg||JPEG image||517K||Transects of 200 m width in the southwest/northeast direction from which persistent scatterers (PS) were extracted to investigate a possible tilt in the PSI results (see text).|
|Final_2013GL056052fs07.jpg||JPEG image||190K||Line of sight PS velocities from the two transects shown in Figure S6.|
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