- 1Department of Ocean Sciences, Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Miami, FL, USA
- 2National Oceanography Centre, Southampton, United Kingdom
- 3Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
- 4Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Nova Scotia, Canada
Despite numerous model-based analyses indicating a significant decline in the Atlantic Meridional Overturning Circulation (AMOC) in recent decades, robust, long-term evidence from multi-latitudinal in-situ observations remains limited. This study analyzes observational data from four mooring arrays, positioned along the western boundary of the North Atlantic (from 42.5°N to 16.5°N), to produce time series of the deep western boundary contribution to AMOC below and relative to 1000 m. Comparisons of such a transport time series at 26.5°N at the Rapid-MOCHA array confirms the viability of using the deep western boundary contribution transport to represent long-term trends and interannual variability of the AMOC. Overall, we detect linear trends of the deep overturning transports at all four latitudes, corresponding to a meridionally widespread decline of the AMOC over the past 20 years.
How to cite: Xing, Q., Elipot, S., Johns, W., Smeed, D., Moat, B., Lankhorst, M., and Loder, J.: Significant and Widespread Decline of the Observed Atlantic Meridional Overturning Circulation, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-7046, https://doi.org/10.5194/egusphere-egu25-7046, 2025.
