Research

My research focuses on understanding fundamental physical processes that shaped Earth’s surfaces in the past and are presently affecting the surface and near surface environments of Earth and other terrestrial planets.  Where possible, my research combines field work and complementary remote sensing methods to obtain a spatial perspective that could not be obtained otherwise. In the field, I employ 'traditional' geomorphic mapping and soil descriptions as well as high-resolution 3D surveying with ground-based LiDAR and/or GPS RTK systems. I frequently build on Quaternary dating techniques such as luminescence and CRN. My remote sensing research efforts include multi- and hyper-spectral visibile to thermal infrared images, radar images and ariborne LiDAR data.

Current projects include (by theme): Rock weathering on desert surfaces, Intra-continental strike-slip deformation, Coastal erosion, Active surfaces processes on Mars and research related to NASA's Terra/ASTER satellite. Quick links to individual research projects are listed on the left.


ROCK WEATHERING ON DESERT SURFACES
LiDAR_scanning_Fig1aRoughness for weathering – Power spectral denisity (PSD) analysis of mm-scale 3D LiDAR measurements reveals systematic roughness evolution on desert alluvial surfaces during late Quaternary time-scales. These spectral roughness measurements provide new quantitative insights into the process and rates of subaerial rock weathering in such terrains. Read more…
Eran_scanning2Roughness for surface age LiDAR-based measurements of surface roughness provide quantitative proxies for obtaining regionally calibrated surface ages for abandoned alluvial surfaces in desert environments. M.Sc. project Eran Trabelci. Read more…
radar-cal_curveDating alluvial surfaces with spaceborne radar – ALOS-PALSAR (L-band) images are established as calibrated proxies for obtaining numerical surface age estimates for alluvial surface in desert environments and for carrying out regional-scale tectonic and landscape evolution studies. Ph.D. thesis Guy Hetz. Read more…
INTRA-CONTINENTAL STRIKE SLIP DEFORMATION
Ih_Bogd2Late Quaternary lateral slip rates across the Gobi-Altai fault system in SW MongoliaLuminesnce ages for laterally offset alluvial units indicate presistent sinistral slip rates of ~5-6 mm/yr during the last ~150 ka. Read more…

 


 

ASTER_DST2The distribution and rates of Quaternary lateral slip across the Dead Sea Transform (DST)Spectral constraints on lateral offsets obtained with ASTER short-wave infrared data together with radar estiamted surfaes ages are used to quantify the amount of total off-axis lateral deformation across the DST and to determine lateral slip rates during the last ~million years. Ph.D. thesis Guy Hetz. Read more…

 

Gelman1Changes in drainage systems as indicators for recent off-axis deformation along the Arava segment of the DSTCombining geomorphic mapping with luminesence dating to study tectonic tilting of darinage systems along the western borders of the Arava valley north of the Gulf of Elat. M.Sc. project Yedidya Gelman. Read more…..
COASTAL EROSION
Coast_LiDAR2Sea-cliff retreat in the eastern Mediterranean Ground-based LiDAR, luminescence dating, underwater surveys and airborne LiDAR are combined to study the process and rates of eolianite sea-cliff erosion along Israel's Mediterranean coast since the mid-Holocene. Read More….

 

 

 

Mataias (Large)Regressive and transgressive coastal erosion along the western shores of the Dead Sea  Using repeat ground-based LiDAR surveys to study the formation of wave-cut terraces in response to transient seasonal/storm-induced lake-level rise events. M.Sc. project Matias Groisman. Read more…
sinkholesSinkhole formation along the Dead Sea shores – Studying and monitoing sinkhole formation and evolution using High-resolution airborne LiDAR data. Read more…

 

 

 

 

 

 

 

MARS
streaks-RSLActive brine seeps onto the surface of present-day Mars?Using color (HiRISE), multispectral (HRSC) and hyperspectral (CRISM) data together with roughness mapping from stereo images to understand the nature of actively forming slope streaks on Mars. Read more…


 

Mars_roughnessSub-pixel surface roughness mapping from orbital stereo imagesUsing high-resolution stereo and/or repeat images (HRSC, THEMIS, HiRISE) to quantify unresolved sub-pixel surface roughness on Mars for scientifc and landing/trafficability applications. Read more…
ASTER
ASTER_veg2Sub-pixel vegetation abundance mapping with ASTER stereo images Using the stereo channels on NASA's Terra/ASTER sensor to quantify sub-pixel vegetation abundances in semi-arid terrains and open and closed canopy forests. Read more…

 

 

 

ASTER-MASTER-TIRASTER TIR emissivity product validation – Using MAKO hyperspecrtal images for validation of ASTER's standard L2 emissivity product. Read more…