Tectonic, Eustatic and Isostatic Changes along the Indian Coast

Subrahmanya, K. R.

doi:10.1007/978-94-015-8719-8_10

Cited by 4 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Caccamise et al (2005) have described an inconsistency of the Hilo TG record compared to the nearby Honolulu TG, whereas Yanagi & Akaki (1994) and Emery & Aubrey (1991) have explained the anomalous increase in sea level from 1965 to 1982 at Manila and Fort Phrachula Chomklao invoking a large withdrawal of groundwater; the anomalies shown by the Manila record are attributed by Douglas (1991) to the tectonic movements in that area and to harbour development. For the Indian TGs, in addition to the subsidence problems (Subrahmanya 1996), it is recognized that the records were influenced by the high frequency of tropical cyclones and storm surges (Das & Radhakrishna 1991). Finally, a large interannual variability is the cause of the unreliability of the trend observed at the Ko Taphao Noi TG (Unnikrishnan & Shankar 2007).…”

Section: Discussionmentioning

confidence: 99%

New estimates of secular sea level rise from tide gauge data and GIA modelling

Spada

Galassi

2012

Geophysical Journal International

View full text Add to dashboard Cite

SUMMARY During the last three decades, at least 30 independent estimates of the secular global mean sea level rise (GMSLR) have been published, based on sufficiently long tide gauge (TG) records. Despite its apparent simplicity, the problem of GMSLR is fraught with a number of difficulties, which make it one of the most challenging questions of climate change science. Not surprisingly, published estimates show considerable scatter, with rates ranging between 1 and 2 mm yr−1 for observations on the century timescale. In previous work, the importance of Glacial Isostatic Adjustment (GIA) upon the assessment of the GMSLR has been clearly demonstrated. In particular, starting from the 1980s, GIA models have been routinely employed to decontaminate TG observations from the effects of melting of the late‐Pleistocene ice sheets, to fully highlight the sea level variations driven by climate change. However, uncertainties associated with the Earth’s rheological profile and the time history of the past continental ice sheets can propagate into the GIA corrections. After revisiting previous work and estimates, we suggest a significant modification of the criteria for the selection of the TGs which are most suitable for the robust assessment of the secular GMSLR. In particular, we seek a set of TGs for which GIA corrections are essentially independent of the parametrization of the rheological profile of the Earth’s mantle and of the detailed time chronology of surface loading. This insensitivity is established by considering predictions based upon three GIA models widely employed in the recent literature (namely, ICE–3G, ICE–5G and the one developed at the Research School of Earth Sciences of the National Australian University). Applying this approach and selection criteria previously proposed in the literature, we identify a set of 22 sufficiently evenly distributed TGs. By simple statistical methods, these records yield a ‘preferred’, GIA‐independent GMSLR estimate since 1880, namely 1.5 ± 0.1 mm yr−1 (rms = 0.4 mm yr−1, wrms = 0.3 mm yr−1). This value is consistent with various previous estimates based on secular TG observations and with that proposed, for the 20th century, by the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (1.7 ± 0.5 mm yr−1).

show abstract

Section: Discussionmentioning

confidence: 99%

New estimates of secular sea level rise from tide gauge data and GIA modelling

Spada

Galassi

2012

Geophysical Journal International

View full text Add to dashboard Cite

show abstract

“…The tide gauge data from the west coast has shown an increasing trend of mean sea level during recent times at Cochin, whereas Mangalore showed lowering of the sea level, indicating subsidence south of the study area and uplifting at the Northern latitudes (13°N) (Subrahmanya, 1996). The data (between 1953 and 1990) shows an uplift of 1.3-3.85 mm/a at Mangalore, whereas for Cochin (between 1939 and 1990) a rate of −2.1 to −1.29 mm/a (submergence) was determined (Emery and Aubrey, 1989;Bendick and Bilham, 1999).…”

Section: Holocene Sea-level Changes and Tectonicsmentioning

confidence: 96%

Evidence of Late Holocene shoreline progradation in the coast of Kerala, South India obtained from OSL dating of palaeo-beach ridges

et al. 2015

View full text Add to dashboard Cite

“…It is structurally steep, and folded mountains stretch over India's northern borders. The two ridges are the Western Ghats Belt (WGB) Hills and the Eastern Ghats Belt (ECB) Hills [40,41]. The Mean Sea Level (MSL) rise of 170 mm globally, has surged the flood risk and land subsidence, and the melting of glaciers in the Himalayas, and a series of manmade dams has added to the land subsidence.…”

Section: Geological Formation Indiamentioning

confidence: 99%

The Geohazard as Land Subsidence in Anthropocene, India

Mishra

2023

JGEESI

View full text Add to dashboard Cite

Land subsidence events, natural or anthropogenic, will be future national challenges for India. The positioning of the Indian plate in the globe, and human activities on the frustum compel land subsidence everywhere, on mountains, in deltas, riverbeds and in settlements. Many mega deltas of the globe including India are sinking, shrinking, and subsiding which shall invite catastrophes. The present search uses the available datasets in print media, books, information technology and electronic media. The survey responses sourced from websites were physically ground verified, etc. Considering Bhuban data, Arc GIS software and Microsoft Excel, India's hazard, organic and inorganic maps are prepared to alert our forthcoming ancestors. Using those maps the zonal map of geo-hazards in various states of India can be prepared and future action plans can be shorted out. Studies reveal that geo-hazards in various zones of India are different. Hazards on mountains are land slide, torrential rain, and land subsidence, whereas the calamities along the coasts, and deltas are cyclones, coastal erosions, floods, and deltaic subsidence. With surging human activities, the frequency and intensity of geo-hazards are swelling presently. It is high time to plan to appease the vulnerability of the rising devastation to attain sustainability of SDG Targets 11.5, and 13 which will moderate the adverse effects of such disasters.

show abstract

Tectonic, Eustatic and Isostatic Changes along the Indian Coast

Cited by 4 publications

References 6 publications

New estimates of secular sea level rise from tide gauge data and GIA modelling

New estimates of secular sea level rise from tide gauge data and GIA modelling

Evidence of Late Holocene shoreline progradation in the coast of Kerala, South India obtained from OSL dating of palaeo-beach ridges

The Geohazard as Land Subsidence in Anthropocene, India

Contact Info

Product

Resources

About