@article{fdi:010072430, title = {{C}ontributions of a strengthened early {H}olocene monsoon and sediment loading to present-day subsidence of the {G}anges-{B}rahmaputra {D}elta}, author = {{K}arpytchev, {M}. and {B}allu, {V}. and {K}rien, {Y}. and {B}ecker, {M}. and {G}oodbred, {S}. and {S}pada, {G}. and {C}almant, {S}t{\'e}phane and {S}hum, {C}. {K}. and {K}han, {Z}.}, editor = {}, language = {{ENG}}, abstract = {{T}he contribution of subsidence to relative sea level rise in the {G}anges-{B}rahmaputra delta ({GBD}) is largely unknown and may considerably enhance exposure of the {B}engal {B}asin populations to sea level rise and storm surges. {T}his paper focuses on estimating the present-day subsidence induced by {H}olocene sediment in the {B}engal {B}asin and by oceanic loading due to eustatic sea level rise over the past 18 kyr. {U}sing a viscoelastic {E}arth model and sediment deposition history based on in situ measurements, results suggest that massive sediment influx initiated in the early {H}olocene under a strengthened {S}outh {A}sian monsoon may have contributed significantly to the present-day subsidence of the {GBD}. {W}e estimate that the {H}olocene loading generates up to 1.6 mm/yr of the present-day subsidence along the {GBD} coast, depending on the rheological model of the {E}arth. {T}his rate is close to the twentieth century global mean sea level rise (1.1-1.7 mm/yr). {T}hus, past climate change, by way of enhanced sedimentation, is impacting vulnerability of the {GBD} populations. {P}lain {L}anguage {S}ummary {T}his paper estimates the land subsidence induced by sediments deposited in the {B}engal {B}asin and by the sea level rise over the past 18,000 years. {T}he results of numerical modeling demonstrate that the coast of the {G}anges-{B}rahmaputra delta subsides at a rate of about 1-1.6 mm/yr depending on the lithospheric thickness and the {E}arth mantle viscosity. {T}his is comparable to the rate of global mean sea level rise during the twentieth century. {T}hus, the intense sedimentation generated by climate changes in the past contributes significantly to the present-day subsidence of the {B}engal coast.}, keywords = {{BANGLADESH} ; {BENGALE} {GOLFE} ; {GANGE} {BRAHMAPOUTRE} {DELTA}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {45}, numero = {3}, pages = {1433--1442}, ISSN = {0094-8276}, year = {2018}, DOI = {10.1002/2017gl076388}, URL = {https://www.documentation.ird.fr/hor/fdi:010072430}, }