Impact of strong El Nino events (1997/98 and 2009/10) on sinking particle fluxes in the 10 degrees N thermocline ridge area of the northeastern equatorial Pacific SCIE SCOPUS

Cited 8 time in WEB OF SCIENCE Cited 8 time in Scopus
Title
Impact of strong El Nino events (1997/98 and 2009/10) on sinking particle fluxes in the 10 degrees N thermocline ridge area of the northeastern equatorial Pacific
Author(s)
Kim, Hyung Jeek; Hyeong, Kiseong; Yoo, Chan Min; Khim, Boo Keun; Kim, Kyeong Hong; Son, Ju Won; Kug, Jong Seong; Park, Jong Yeon; Kim, Dongseon
KIOST Author(s)
Kim, Hyung Jeek(김형직)Hyeong, Kiseong(형기성)Yoo, Chan Min(유찬민)Kim, Kyeong Hong(김경홍)Kim, Dongseon(김동선)
Publication Year
2012-09
Abstract
Sinking particle fluxes during two strong El Nino events (1997/98 and 2009/10) were monitored at a station (10 degrees 30N, 131 degrees 20W) located in the 10 degrees N thermocline ridge area (9 degrees-13 degrees N, 105 degrees-140 degrees W) of the northeastern equatorial Pacific. The 1997/98 El Nino event resulted in two- to fourfold higher organic carbon and biogenic silica fluxes than the non-ENSO levels. In combination, these findings suggest an increase in the productivity of surface waters. The strengthening of the North Equatorial Countercurrent, due to intensified westerlies and the resulting shoaling of the thermocline, likely induced upwelling of nutrient-enriched subsurface water and enhanced biological productivity. In contrast, the 2009/10 El Nino event was only accompanied by a substantial increase in planktonic foraminifera, with minor increases in organic carbon and biogenic silica fluxes. The distinct differences in the particle composition and the biological response of the marine ecosystem during the two El Nino events are attributed to different oceanographic and atmospheric conditions generated by two different types of El Nino: the cold-tongue (CT) type and the warm-pool (WP) type. Our results, together with the findings of a previous study of the 1982/83 strong El Nino event, suggest that enhanced biological productivity occurs in the 10 degrees N thermocline ridge area under strong El Nino conditions. Our study also provides insight into equatorial biological dynamics under the extreme CT- and WP-type El Nino conditions. This is important because the WP-type El Nino conditions are projected to increase in frequency in the future. (c) 2012 Elsevier Ltd. All rights reserved.
ISSN
0967-0637
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/3567
DOI
10.1016/j.dsr.2012.05.008
Bibliographic Citation
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, v.67, pp.111 - 120, 2012
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
EASTERN TROPICAL PACIFIC; NORTH PACIFIC; PRIMARY PRODUCTIVITY; SURFACE CHLOROPHYLL; SUBTROPICAL GYRE; SEAWIFS DATA; TIME-SERIES; DEEP-OCEAN; SEA-LEVEL; WARM POOL
Keywords
10 degrees N thermocline ridge area; Sinking particle fluxes; Strong El Nino; Cold-tongue and warm-pool type El Nino; Biological productivity
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Particle flux,Carbon cycle,Climate Change,입자 플럭스,탄소순환,기후변화

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