FN Archimer Export Format PT J TI Anthropogenic pressure on the open ocean: The growth of ship traffic revealed by altimeter data analysis BT AF TOURNADRE, Jean AS 1:1; FF 1:PDG-ODE-LOS; C1 IFREMER, Lab Oceanog Spatiale, Plouzane, France. C2 IFREMER, FRANCE SI BREST SE PDG-ODE-LOS IN WOS Ifremer jusqu'en 2018 IF 4.196 TC 104 UR https://archimer.ifremer.fr/doc/00229/34039/32432.pdf LA English DT Article DE ;altimetry;ship traffic;pollution;anthropogenic pressure AB Marine ecosystems are under increasing anthropogenic pressures from marine and terrestrial activities. Ship traffic, the major cause of change in the open ocean, and its temporal evolution are still largely unknown because of lack of data. Altimeter data provide a new powerful tool to detect and monitor the ship traffic through a method of analysis of echo waveform. The archive of seven altimeter missions has been processed to create a two decade database of ship locations. The estimated annual density maps compare well with the ones obtained from Automatic Identification System. The ship traffic analysis shows a global fourfold growth between 1992 and 2012, the largest increase being observed in the Indian Ocean and the Chinese seas reflecting the world trade change. Although mainly concentrated along lanes, the traffic has a direct impact on the atmosphere, e.g., on the growth of tropospheric nitrogen dioxide in the Indian Ocean. PY 2014 PD NOV SO Geophysical Research Letters SN 0094-8276 PU Amer Geophysical Union VL 41 IS 22 UT 000346644600022 BP 7924 EP 7932 DI 10.1002/2014GL061786 ID 34039 ER EF