6 Nov
2020
6 Nov
'20
5:59 p.m.
Annonce postée par : CollinAntoine (antoine.collin(a)ephe.psl.eu)
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Title: PhotonExplorer, Improving Marine Habitat Mapping using Satellite-based LiDAR and
Imagery Fusion
Host laboratory : Centre de Géo-Ecologie Littorale (EPHE-PSL, UMR 6554) / Espace-Dev (IRD,
UMR 228)
Address : CGEL Dinard, 15 bd de la mer, 35800 Dinard / Espace-Dev, Montpellier
Phone : 02.99.46.10.72 / 04.67.55.86.37
Supervisors :
Antoine COLLIN, MCF – HDR / Rodolphe DEVILLERS, DR
CGEL Dinard / Espace-Dev Montpellier
Dr. Collin : antoine.collin(a)ephe.psl.eu / Dr. Devillers : rodolphe.devillers(a)ird.fr
Projet context: From the study of underwater and coastal hazards, to the modeling of ocean
currents and marine habitat mapping, bathymetric data are essential for ocean and coastal
management and its scientific study. However, most of our oceans are only mapped at very
coarse spatial resolutions (i.e., ~450m), strongly limiting the management that can be
made of many coastal systems. While high-resolution seafloor mapping technologies exist
(e.g. airborne bathymetric LiDAR or ship-based multibeam echosounders), they remain
expensive to deploy, leaving large parts of the world coastal areas poorly known.
This project offers to conduct a feasibility study aiming to test how data from the recent
ICESat-2 ATLAS satellite sensor could help create bathymetric data useful for coastal and
marine habitat mapping.
Launched in 2018, ICESat-2 ATLAS deployed a lidar system from space. While ICESat-2 was
designed to collect data on the cryosphere, it is the first earth-orbiting laser able to
penetrate water at high-resolution, allowing to map waters down to around 40 meters depth.
Our project will have one main task: testing the contribution of ICESat-2 ATLAS data to
improve existing satellite-based bathymetry methods (using passive multispectral sensors).
The task will focus on Mayotte, Indian Ocean, an area that has existing ground-truthing
data but lacks marine habitats of high-resolution. If successful, this pilot project could
open the door to larger projects that would aim to improve the nearshore bathymetry and
habitat maps, providing a method that can be used in many data-poor nearshore environments
around the world.
Trainee proposal : The goal of this project is to assess the feasibility and usefulness of
the recent ICESat-2 bathymetry to help map bathymetry and coastal marine habitats of
data-poor developing countries.
One specific objective is to assess the suitability and accuracy of ICESat-2 data to
improve existing habitat mapping methods. This project intends to serve as a pilot project
testing the feasibility of a very recent technology and is not linked to any other
existing projects.
The proposed work will look at one question: can ICESat-2 data help improve existing
satellite-based marine habitat mapping approaches ? The project leaders will guide the
student, with Dr. Jasinski (NASA) a resource for ICESat-2 data product retrieval, quality
and integration. Due to the absence of field work the proposed work would not be impacted
by the covid-19 crisis.
Trainee dates : 6 months in 2021 (February to July OR March to August).
Remuneration : 570 euros per month
(https://www.service-public.fr/simulateur/calcul/gratification-stagiaire).
Application : A CV, a letter of intent and Master 1/Engineer 2 results before 11 December
2020.
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L'annonce est située https://georezo.net/forum/viewtopic.php?pid=336859#p336859
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