Japan Geoscience Union Meeting 2018

Presentation information

[EE] Poster

A (Atmospheric and Hydrospheric Sciences) » A-OS Ocean Sciences & Ocean Environment

[A-OS12] Continental-Oceanic Mutual Interaction: Planetary scale Material Circulation

Tue. May 22, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Yosuke Alexandre Yamashiki(Earth & Planetary Water Resources Assessment Laboratory Graduate School of Advanced Integrated Studies in Human Survivability Kyoto University), Yukio Masumoto(Graduate School of Science, The University of Tokyo), Swadhin Behera(Climate Variation Predictability and Applicability Research Group, Application Laboratory, JAMSTEC, 3173-25 Showa-machi, Yokohama 236-0001, 共同), Takanori Sasaki(Department of Astronomy, Kyoto University)

[AOS12-P02] Oceanic Primary Producers’ Responses to ENSO Variability: The Role of Continental-Oceanic Interactions

*Recalt Fanny Marie2, Yosuke Alexandre Yamashiki1, Shubha Sathyendranath2, Trevor Platt3, Robert Brewin2, Dionysios Raitsos2, Thomas Jackson2 (1.Earth & Planetary Water Resources Assessment Laboratory Graduate School of Advanced Integrated Studies in Human Survivability Kyoto University, 2.Plymouth Marine Laboratory, 3.Bedford Institute of Oceanography)

Keywords:Oceanic primary producers, Remote sensing, ENSO

Oceanic primary producers respond rapidly to a complex spectrum of climate-driven perturbations, confounding attempts to isolate the principal causes of observed changes. A dominant mode of variability in the Earth-climate system is that generated by the El Niño phenomenon. Recently, marked variations have been observed in the centroid of anomalous warming in the Equatorial Pacific under El Niño, associated with quite different teleconnection patterns. Here, using observational and reanalysis datasets, we differentiate the regional forcing mechanisms, including continental-oceanic interactions, and assess their influence on oceanic primary producers during two extreme types of El Niño. We find robust evidence that Eastern Pacific (EP) and Central Pacific (CP) types of El Niño generate regionally-different, and sometimes opposite, impacts on primary producers, associated with changes in inland precipitation, as well as wind-driven dust transport from inland deserts and vegetation fires. Our analysis highlights complex interactions between continental and oceanic processes that: 1) are forced by remote teleconnection patterns, and 2) may act in synergy to create larger responses in oceanic primary producers.