Unnikrishnan A. S., Nidheesh A. G., Lengaigne Matthieu. (2015). Sea-level-rise trends off the Indian coasts during the last two decades. Current Science, 108 (5), p. 966-971. ISSN 0011-3891.
Titre du document
Sea-level-rise trends off the Indian coasts during the last two decades
Unnikrishnan A. S., Nidheesh A. G., Lengaigne Matthieu
Source
Current Science, 2015,
108 (5), p. 966-971 ISSN 0011-3891
The present communication discusses sea-level-rise trends in the north Indian Ocean, particularly off the Indian coasts, based on estimates derived from satellite altimeter and tide-gauge data. Altimeter data analysis over the 1993-2012 period reveals that the rate of sea-level rise is rather spatially homogeneous over most of the north Indian Ocean, reaching values close to global mean sea-level-rise trend (3.2 mm yr(-1)) estimated over the same period. The only notable exception lies in the northern and eastern coasts of the Bay of Bengal, which experience larger trends (5 mm yr(-1) and more). These recent trends derived from altimeter data are higher than those estimated from tide-gauge records over longer periods during the 20th century. This communication calls for an improved understanding of the mechanisms behind this accelerated sea-level-rise recorded over the past two decades, that could either be a direct response to global warming or a result from an aliasing by the natural variability.
