Estimation of vertical land motion along the south and west coast of Turkey from multi-sensor observations

Erkoç, Muharrem Hilmi; Doǧan, Uǧur; Yıldız, Hasan; Sezen, Erdinç

doi:10.1016/j.asr.2022.06.022

Cited by 8 publications

(4 citation statements)

References 60 publications

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“…Poyraz et al (2019) and Poyraz and Hastaoglu (2020) determined deformation rates in the eastern Gediz graben from GNSS and persistant scatterer InSAR (PSInSAR). Vertical deformation from multiple sensors is also available for several coastal locations (Erkoç et al, 2022); however, comparison with these data is less accurate owing to decorrelation in the coastal areas (see Supplement 2). For comparison with other studies, we average InSAR velocities in a box of ∼1 km around the sites of other studies, error bars display three standard deviations of the averaged velocities.…”

Section: Accuracy Of Velocitymentioning

confidence: 99%

North-South and Vertical Deformation Across the Western Anatolian Extensional Province (Türkiye) from Sentinel-1 InSAR

Diercks,

Hussain,

Mildon

et al. 2023

Preprint

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Quantifying interseismic deformation of fault networks which are predominantly deforming in a north-south direction is challenging, because GNSS networks are usually not dense enough to resolve deformation at the level of individual faults. The alternative, synthetic aperture radar interferometry (InSAR), provides high spatial resolution but is limited by a low sensitivity to N-S motion. We study the active normal fault network of Western Anatolia, which is undergoing rapid N-S extension, using InSAR. In the first part of this study, we develop a workflow to assess the potential of decomposing InSAR line-of-sight (LOS) velocities to determine the N-S component. We use synthetic tests to quantify the impact of noise and other velocity components and outline the requirements to detect N-S deformation in future studies. In its current state, the N-S deformation field is too noisy to allow robust interpretations, hence in the second part we complement the study by including vertical deformation. Since most faults in the study region are normal faults, the high-resolution vertical velocity field provides new insights into regional active faulting. We show that tectonic deformation in the large graben systems is not restricted to the main faults, and seemingly less active or inactive faults could be accommodating strain. We also observe a potential correlation between recent seismicity and active surface deformation. Furthermore, we find that active fault splays causing significant surface deformation can form several kilometres away from the mapped fault trace, and provide an estimate of current activity for many faults in the region.

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Section: Accuracy Of Velocitymentioning

confidence: 99%

North-South and Vertical Deformation Across the Western Anatolian Extensional Province (Türkiye) from Sentinel-1 InSAR

Diercks,

Hussain,

Mildon

et al. 2023

Preprint

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“…There are some studies using coastal altimetry data [13,14]. [13] analyzed regional differences in sea level trends between the open ocean and coastal region in a study conducted as a part of the European Space Agency's Climate Change Initiative project.…”

Section: Introductionmentioning

confidence: 99%

“…[13] analyzed regional differences in sea level trends between the open ocean and coastal region in a study conducted as a part of the European Space Agency's Climate Change Initiative project. In addition, [14] determined sea level changes in the south and west coasts of Turkey using X-TRACK coastal altimetry data and grid data provided by CMEMS.…”

Section: Introductionmentioning

confidence: 99%

Recent Change in Sea Level Along the Coast of New Zealand Using Tide Gauge and XTRACK Coastal Altimetry Data

Erkoç

2023

Preprint

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The rise in sea level along the coasts of New Zealand has accelerated in recent decades due to the impact of climate change. Determining the effects of these changes on the coastal regions is critical for their sustainability. In order to gain insight into these impacts, the present study aimed to analyze sea level changes using satellite altimetry and tide gauge data from 11 tide gauge stations along the New Zealand coast between 1993 and 2022, as well as XTRACK data processed with the coastal altimetry approach to minimize the effects of classical altimetry near coasts. The least-squares parameter estimation method was used to analyze the data and determine annual and semi-annual seasonal effects. The results showed that the sea level trend is rising in both methods; for instance, 4.2 ± 0.6 mm/yr from the tide gauge data and 3.6 ± 0.8 mm/yr from the XTRACK data at the WELLINGTON HARBOUR tide gauge. The results of this study demonstrate the importance of closely monitoring the impacts of sea level rise on the coastal regions of New Zealand to ensure their long-term sustainability. The results also highlight the utility of using multiple data sources and methods to provide a comprehensive understanding of these changes.

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“…In the conventional satellite-based approach, the displacements of a structure induced by dynamic processes are monitored using a GNSS receiver embedded in the structure. Assuming that the point coordinates of the structures are monitored by static GNSS measurements, the calculations are often based on the average of the structure observed in an interval of 30 second or more [13]. Because of the disadvantages of accelerometers [14] in measuring lowfrequency structural displacements and GNSS in lowamplitude displacements, both accelerometers and GNSS [15], [16] should be integrated into SHM.…”

Section: Introductionmentioning

confidence: 99%

Testing the Performance of the Video Camera to Monitor the Vertical Movements of the Structure via a Specially Designed Steel Beam Apparatus

Eren

Hoşbaş

2023

Measurement Science Review

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This article focuses on a specially designed steel beam testing apparatus to determine the dynamics of the structure using data obtained from different sensor systems. The analysis of these different sensor systems is performed by processing data recorded by the Global Navigation Satellite System (GNSS), vision based measurement (video camera), and accelerometer surveys. To perform this analysis, the accelerometer and GNSS receiver are installed at the steel beam’s mid-span position. The high-contrast artificial target attached to the accelerometer is recorded by a video camera to monitor the structural dynamics. Steel beam experiments show that it is compatible with the accelerometer, which is predicted as a reference sensor in detecting motion with an amplitude of 10 mm and above in the vertical direction with GNSS and determining the structural frequency by spectral analysis. On the other hand, we concluded that the video camera can be used to determine the structural dynamics in SHM because its results were compatible with the reference data even if the amplitude was too small.

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Estimation of vertical land motion along the south and west coast of Turkey from multi-sensor observations

Cited by 8 publications

References 60 publications

North-South and Vertical Deformation Across the Western Anatolian Extensional Province (Türkiye) from Sentinel-1 InSAR

North-South and Vertical Deformation Across the Western Anatolian Extensional Province (Türkiye) from Sentinel-1 InSAR

Recent Change in Sea Level Along the Coast of New Zealand Using Tide Gauge and XTRACK Coastal Altimetry Data

Testing the Performance of the Video Camera to Monitor the Vertical Movements of the Structure via a Specially Designed Steel Beam Apparatus

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