Mery Biswas

Research Field

Paleocurrent

Sinuosity

10.1016/j.jsames.2023.104502

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Citations (6)

Regional tidal modeling on the European coast using tide gauges and satellite altimetry

Frontiers in Marine Science (2024)

Kutubuddin Ansari J. Walo Kinga Węzka Mery Biswas Soumyajit Mukherjee

The study investigates sea-level measurements along the coastal area of Europe for the 60-year (1961–2020) time span. Linear and quadratic modeling of tide gauge measurements showed an almost positive rate of trend of sea-level rise (0.09 to 3.6 mm/yr) and low acceleration (−0.05 to 0.40 mm/yr 2 ). A least-squares harmonic estimation tidal modeling was carried out to estimate frequency (cycles per day) for a certain period. The smaller and higher tidal frequencies of these stations indicate their stability in terms of their surface variation. We used the 1993–2020 satellite altimetry data from the nearest grid points of the tide gauge station. The correlation coefficient between observed and satellite altimetry (lowest 0.53 and highest 0.93) varies at each station. This happens because of many factors that can affect the large difference in the sea-level trend between the satellite-derived and tide gauge results. Finally, to implement a global reference system for physical heights, the offshore topographic slope direction and slope range with contour spacing from the sea to the associated coastline were analyzed using bathymetry data. The abrupt change in slope from the coastline toward the sea can be seen toward the east, west, and southeast on the European coast. This is also an important factor that affects the variation of sea level.

Tide gauge

Dynamic height

10.3389/fmars.2024.1412736

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Citations (1)

Geomorphic signatures and active tectonics in western Saurashtra, Gujarat, India

Geodesy and Geodynamics (2023)

Bikramaditya Mondal Mery Biswas Soumyajit Mukherjee Mohamedharoon A. Shaikh

Active tectonics in an area includes ongoing or recent geologic events. This paper investigates the tectonic influence on the subsidence, uplift and tilt of western Saurashtra through morphotectonic analysis of ten watersheds along with characteristics of relief and drainage orientation. Watersheds 7–9 to the north (N) are tectonically active, which can be linked with the North Kathiawar Fault System (NKFS) and followed by watersheds 6, 10, 1, 4 and 5. Stream-length gradient index and sinuosity index indicate the effect of tectonic events along the master streams in watersheds 6–9. Higher R2 values of the linear curve fit for watershed 7 indicate its master stream is much more tectonically active than the others. The R2 curve fitting model and earthquake magnitude/depth analysis confirm the region to be active. The reactivation of the NKFS most likely led to the vertical movement of western Saurashtra.

Saurashtra

Sinuosity

10.1016/j.geog.2023.08.001

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Citations (4)

Correction to: Evolutionary characteristics of meander cut-off — A hydro-morphological study of the Jalangi River, West Bengal, India

Arabian Journal of Geosciences (2019)

Mery Biswas Pradyut Dhara

West bengal

Meander (mathematics)

BENGAL

10.1007/s12517-019-4971-2