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Dynamics and Causes of Sea Level Rise in the Coastal Region of Southwest Bangladesh at Global, Regional, and Local Levels

2022Journal article Open access
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dc.contributor.authorAshrafuzzaman, Md.
dc.contributor.authorSantos, Filipe
dc.contributor.authorDias, João Miguel
dc.contributor.authorCerdà, Artemi
dc.date.accessioned2023-02-16T12:32:36Z
dc.date.available2023-02-16T12:32:36Z
dc.date.issued2022
dc.description.abstractGlobal greenhouse gas emissions have caused sea level rise (SLR) at a global and local level since the industrial revolution, mainly through thermal expansion and ice melting. Projections indicate that the acceleration of SLR will increase in the near future. This will affect coastal and deltaic populations worldwide, such as in Bangladesh, where almost half of the population resides in regions lower than 5 m above sea level. This study found three coastal tidal gauges and five deltaic gauge stations, which showed increases in SLR at greater rates than the regional and global averages. This research also used satellite altimetry data to analyze regional and global SLR averages in the recent past and the 21st century. There is a trend towards increasing sea level based on results from three tide gauge stations: Char Changa with 7.6 mm/yr, Hiron Point at 3.1 mm/yr from 1993 to 2019, and 14.5 mm/yr at Cox’s Bazar from 1993 to 2011. Based on the linear trend from these time frames, it is projected that SLR in Char Changa will increase by 228 mm from 2020 to 2050, and by 608 mm by 2100, at Hiron Point by 93 mm in 2050 and 248 mm by 2100, and at Cox’s Bazar by almost 435.7 mm by 2050, and more than 1162 mm by 2100. Based on an average from satellite altimeters, assuming a linear increase in SLR, the Bay of Bengal shows an increase of 0.4 mm compared to the global trend. Other river delta stations in the study area also show increasing SLR, specifically, at Kalaroa, Benarpota, Kaikhali, Tala Magura, and Elarchari. Kalaroa and Benarpota show the highest, with SLR of >40 mm/yr. It is also observed that increasing SLR trends are far higher than coastal tide gauges, indicating that physical processes in the delta region are affecting SLR, further contributing to either an increase in water volume/SLR or activating land subsidence. This is partly due to the subsidence of the delta as a result of natural and anthropomorphic effects, as well as an increase in Himalayan glacier melting due to global warming. This indicates that Bangladesh coastal areas will soon experience a far greater SLR than the rest of the Bay of Bengal or other global coastal areas.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAshrafuzzaman, M., Santos, F.D., Dias, J.M., Cerdà, A. (2022). Dynamics and Causes of Sea Level Rise in the Coastal Region of Southwest Bangladesh at Global, Regional, and Local Levels. Journal of Marine Science and Engeniring, 10, 779pt_PT
dc.identifier.doi10.3390/jmse10060779pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/56339
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationLA/P/0094/2020pt_PT
dc.relationCentre for Environmental and Marine Studies
dc.relationCentre for Environmental and Marine Studies
dc.relation.publisherversionhttps://www.mdpi.com/2077-1312/10/6/779pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSouth Western Coastal Region (SWCR) Bangladeshpt_PT
dc.subjectTide gaugept_PT
dc.subjectSatellite altimetrypt_PT
dc.subjectLand subsidencept_PT
dc.subjectSea level risept_PT
dc.subjectRiver deltapt_PT
dc.titleDynamics and Causes of Sea Level Rise in the Coastal Region of Southwest Bangladesh at Global, Regional, and Local Levelspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50017%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50017%2F2020/PT
oaire.citation.issue6pt_PT
oaire.citation.startPage779pt_PT
oaire.citation.titleJournal of Marine Science and Engineeringpt_PT
oaire.citation.volume10pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameAshrafuzzaman
person.familyNameSantos
person.givenNameMd
person.givenNameFilipe
person.identifier.ciencia-id941E-BE64-C922
person.identifier.ciencia-idB918-FBD8-4108
person.identifier.orcid0000-0003-2187-6549
person.identifier.orcid0000-0001-7316-1479
person.identifier.ridM-7709-2013
person.identifier.scopus-author-id7202141256
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery010c1041-ab53-4a56-9d53-bab25bb653fb
relation.isProjectOfPublication75627078-fa2a-4db1-b278-160b69a0c207
relation.isProjectOfPublication823d5c61-9c82-44cb-8602-9853cdc4270d
relation.isProjectOfPublication.latestForDiscovery75627078-fa2a-4db1-b278-160b69a0c207

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