Gravimetric Methods – Satellite Altimeter Measurements

Chambers, D. P.

doi:10.1016/b978-0-444-53802-4.00063-4

Cited by 3 publications

(3 citation statements)

References 189 publications

(212 reference statements)

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“…TOPEX UCSD has precision per unit second with a distance of 30-40 mm with a gravitational eld resolution of 4-6 mGal. e basic concept of gravimetric satellites is detecting changes in Earth's gravity eld by monitoring changes in distance that occur between pairs of 2 gravimetric satellites in their orbits (Chambers, 2015). The two satellites travel along an orbit path of approximately 220 kilometers between one and the second satellite.…”

Section: Methodsmentioning

confidence: 99%

“…For many subsurface investigations, gravity methods have been used (Araffa et al, 2015;Fallatah et al, 2019;Kurniawan, 2012;Mansour et al, 2018;Mohamed, 2019;Mukherjee & Ramachandran, 2018;Yang et al, 2019). Some researchers have been using gravity satellite information in their research (Álvarez et al, 2013;Chambers 2015.;Chen et al, 2014.;Holzrichter & Ebbing, 2016;Noréus et al (1997); Publishers & Kingdom, 1991. For several decades, the automation in structural geology of remotely sensed data geological mapping has served as a central research topic (Yeomans et al, 2019). Automation overcomes time and subjectivity issues that influence the manual approach.…”

Section: Introductionmentioning

confidence: 99%

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Lineament Extraction using Gravity Data in the Citarum Watershed

Nugraha

Goal

Handayani

et al. 2021

IJG

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Lineament is one of the most important features showing subsurface elements or structural weakness such as faults. This study aims to identify subsurface lineament patterns using automatic lineament in Citarum watershed with gravity data. Satellite gravity data were used to generate a sub-surface lineament. Satellite gravity data corrected using Bouguer and terrain correction to obtain a complete Bouguer anomaly value. Butterworth filters were used to separate regional and residual anomaly from the complete Bouguer anomaly value. Residual anomaly gravity data used to analyze sub-surface lineament. Lineament generated using Line module in PCI Geomatica to obtain sub-surface lineament from gravity residual value. The orientations of lineaments and fault lines were created by using rose diagrams. The main trends observed in the lineament map could be recognized in these diagrams, showing a strongly major trend in NW-SE, and the subdominant directions were in N-S. Area with a high density of lineament located at the Southern part of the study area. High-density lineament might be correlated with fractured volcanic rock upstream of the Citarum watershed, meanwhile, low-density lineament is associated with low-density sediment. The high-density fracture might be associated with intensive tectonics and volcanism.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lineament Extraction using Gravity Data in the Citarum Watershed

Nugraha

Goal

Handayani

et al. 2021

IJG

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“…The BOM observed track parameters showed that the minimum atmospheric pressure at the center of TC Nicholas is about 948 mb. Based on the theoretical formulation of IBE, the residual water level around the center of the cyclone is expected to increase by about 65.3 cm as a result of the decrease in atmospheric pressure from its normal value (assuming a normal atmospheric pressure of 1013.3 mb [54]). However, in this study, the simulation results of the increase in sea level at the cyclone center underestimated the theoretical value by about 16.3 cm (24.9%), as shown in Figure 5 (the simulated value of about 49 cm), although we have blended the ERA-Interim ambient atmospheric data with the BOM observed track parameters of TC Nicholas.…”

Section: Analysis Of Increases In Sea Levels Caused By Tc Nicholasmentioning

confidence: 99%

The Effect of Tropical Cyclone Nicholas (11–20 February 2008) on Sea Level Anomalies in Indonesian Waters

Ningsih

Hanifah

Tanjung

et al. 2020

JMSE

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As reported extensively in both electronic and print media in Indonesia, high wave and anomalously high sea level phenomena occurred in February 2008 in Indonesian waters, mainly along the western coast of Sumatra and the southern coasts of Java-Bali. Tropical Cyclone (TC) Nicholas, occurring in northwestern coastal waters of Australia between 11 and 20 February 2008, might have contributed to the existence of these phenomena in the Indonesian region. This study focused on investigating the effect of TC Nicholas on the increases in sea levels in the Indonesian waters by analyzing residual water levels (non-astronomic tide). In this regard, a storm tide event (the sum of the astronomical tide and storm surge generated by the TC Nicholas) was simulated in this region using the Regional Ocean Modeling System (ROMS). The residual water levels were obtained by removing the tidal part (astronomic tide) from the ROMS simulated total water levels. In addition, to confirm possible influences of TC Nicholas, a lagged correlation analysis was applied between atmospheric pressure at the center of TC Nicholas and residual water level oscillations in the Indonesian waters. It was found that the residual water levels showed a strong correlation with the atmospheric pressure at the center of TC Nicholas in some areas of the Indonesian seas, such as the western coast of Sumatra, the southern coast of Java, Lesser Sunda Islands, and the southern coast of Papua. The increased sea levels on the western coast of Sumatra are up to 16 cm, with TC Nicholas leading the residual water level by 4.18 days (TL: time lag). Meanwhile, they are up to 20 cm (TL = 5.75 days), 21 cm (TL = 1.12 days), and 38 cm (TL = 3.96 days) on the southern coast of Java, the Lesser Sunda Islands, and the southern coast of Papua, respectively. The results of this study could be used as an initial assessment to investigate the most vulnerable Indonesian coastal areas to the impact of the TC and they might be significantly beneficial for designing both a proper disaster risk reduction program and investment policies in the region, particularly in the context of flood risk reduction and adaptation.

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Changes in the Water Surface Level of the Baltic Sea from Satellite Altimetry and Gravity Missions

BIAŁAS,

SOŚNICA

2024

Artificial Satellites

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Satellite altimetry provides high-accuracy geometrical measurements of sea level changes. We analyze altimetry time series representing sea surface height anomalies over the mean sea surface provided by the TOPEX/Poseidon, Jason-1, Jason-2, and Jason-3 satellite missions to estimate the annual rate of sea level rise. Then, we compare the results with satellite gravimetric data from GRACE and GRACE Follow-On missions and surface water temperature data, employing statistical analyses to examine the interrelationships and correlations between them. We carry out the main analyses for the period 2001–2021 with a division into 5-year periods for six different areas of the Baltic Sea. The altimetric results show that between 2001 and 2021, the water level of the Baltic Sea rose by 5.8 mm/year on average. About 72% of the changes detected by altimetry missions can be explained by satellite gravimetry from GRACE and GRACE Follow-On, which means that the mass component is responsible for most of the observed sea level change, whereas the remaining 28% can be greatly explained by thermal expansion due to the water temperature rise.

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Gravimetric Methods – Satellite Altimeter Measurements

Cited by 3 publications

References 189 publications

Lineament Extraction using Gravity Data in the Citarum Watershed

Lineament Extraction using Gravity Data in the Citarum Watershed

The Effect of Tropical Cyclone Nicholas (11–20 February 2008) on Sea Level Anomalies in Indonesian Waters

Changes in the Water Surface Level of the Baltic Sea from Satellite Altimetry and Gravity Missions

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