Reconstructed long-term sea level variability in the North Atlantic Ocean

Yongcun Cheng (Center for Coastal Physical Oceanography, Old Dominion University, United States)

CoAuthors

Benjamin D. Hamlington (Center for Coastal Physical Oceanography, Old Dominion University, United States); Se-Hyeon Cheon (Center for Coastal Physical Oceanography, Old Dominion University, United States)

Event: 2017 Ocean Surface Topography Science Team Meeting

Session: Science I: Climate data records for understanding the causes of global and regional sea level variability and change

Presentation type: Type Poster

The sea level variability at multi-time scales in the North Atlantic Ocean has been well documented from observations and model experiments. In this work, we analyzed long-term sea level variability based on reconstructed sea level product (1900-2012), which combined SST with tide gauge and altimetry data using CSEOF (Cyclostationary Empirical Orthogonal Function) method. Compared with previous sea level reconstructions, (1) the trend at each grid of altimetry data was removed to reconstruct long-term variability and background trend, (2) Atlantic regions were reconstructed separately with Indo-Pacific and then recombined into a global reconstruction to avoid the dominance of Indo-Pacific in global basis functions. The results demonstrate that the reconstructed signal linked to Atlantic multidecadal oscillation (AMO). Moreover, compared with altimetry data, the reconstructed sea level in 20th century exhibits similar correlation spatial patterns with AMOC/NAO.
 

Poster show times:

RoomStart DateEnd Date
Concerto Ballroom Thu, Oct 26 2017,14:00 Thu, Oct 26 2017,18:00
Yongcun Cheng
Center for Coastal Physical Oceanography, Old Dominion University
United States
yccheng.en@gmail.com