A teleconnection between Atlantic sea surface temperature and eastern and central North Pacific tropical cyclones. Issue 2 (28th January 2017)

• Record Type: Journal Article
• Authors: Patricola, Christina M.; Saravanan, R.; Chang, Ping
• Is Part Of: Geophysical research letters. Volume 44:Issue 2(2017)
• Page Start: 1167
• Page End: 1174
• Publication Date: 2017-01-28
• Subjects: tropical cyclones -- Atlantic SST -- ENSO -- teleconnections -- seasonal prediction -- internal atmospheric variability; Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/2016GL071965
• Languages: English
• ISSNs: 0094-8276

Abstract

Abstract: The El Niño–Southern Oscillation (ENSO) is a major source of seasonal tropical cyclone (TC) predictability in both local and remote ocean basins. Unusually warm eastern‐central equatorial Pacific sea surface temperature (SST) during El Niño tends to enhance eastern and central North Pacific (ECNP) TCs and suppress Atlantic TCs. Here we demonstrate that Atlantic SST variability likewise influences remote TC activity in the eastern‐central Pacific through a Walker Circulation‐type response analogous to the ENSO‐Atlantic TC teleconnection, using observations and 27 km resolution tropical channel model (TCM) simulations. Observed and simulated ECNP TC activity is reduced during the positive Atlantic Meridional Mode (AMM), which is characterized by warm northern and cool southern tropical Atlantic SST anomalies, and vice versa during the negative AMM. Large ensembles of TCM simulations indicate that SST variability, rather than internal atmospheric variability, drives extreme ECNP hurricane seasons. Key Points: A teleconnection exists between tropical Atlantic sea surface temperature and seasonal eastern‐central Pacific tropical cyclone activity Both the Atlantic Meridional Mode and ENSO provide seasonal eastern‐central Pacific tropical cyclone predictability Tropical Pacific and Atlantic sea surface temperature, not internal atmospheric variability, drives extreme East Pacific hurricane seasons