Seasonal Variations and Long-term Trends of the Coastal Upwelling along the Southwestern Coast of the East Sea/Japan Sea

Title
Seasonal Variations and Long-term Trends of the Coastal Upwelling along the Southwestern Coast of the East Sea/Japan Sea
Author(s)
신창웅; 김동국; 장찬주
KIOST Author(s)
Shin, Chang Woong(신창웅)Kim, Dong Guk(김동국)Jang, Chan Joo(장찬주)
Publication Year
2018-05-17
Abstract
To investigate seasonal variations and long term trends of coastal upwelling along the southwestern coast of the East Sea/Japan Sea (EJS), sea surface temperature and wind data from 1968 to 2012 were analysed based on an upwelling-related temperature signal and an upwelling index. The upwelling-related temperature signals were estimated by temperature anomaly from a temperature curve that was adapted by a fifth order polynomial with top five temperatures at every day. These signals were negatively correlated (~ 0.6) with southwesterly winds blowing parallel to the coast. In addition, the upwelling signals were closely related with primary productivities near the upwelling region in late spring to early summer, suggesting importance of upwelling on ecosystem in the EJS. The upwelling index calculated by wind shows that the upwelling occurs from April to August with the maximum in July. We found that the long-term trend of the upwelling indices were considerably different season by season: it increased in spring while decreased in summer. Based on regional climate model projection, we also found that the coastal upwelling is projected to be intensified due to an increase in the speed of upwelling-favored wind.emperature signal and an upwelling index. The upwelling-related temperature signals were estimated by temperature anomaly from a temperature curve that was adapted by a fifth order polynomial with top five temperatures at every day. These signals were negatively correlated (~ 0.6) with southwesterly winds blowing parallel to the coast. In addition, the upwelling signals were closely related with primary productivities near the upwelling region in late spring to early summer, suggesting importance of upwelling on ecosystem in the EJS. The upwelling index calculated by wind shows that the upwelling occurs from April to August with the maximum in July. We found that the long-term trend of the upwelling indices were considerably different season by season: it increased in spring while decreased in summer. Based on regional climate model projection, we also found that the coastal upwelling is projected to be intensified due to an increase in the speed of upwelling-favored wind.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23359
Bibliographic Citation
ICS2018, pp.311, 2018
Publisher
ICS2018
Type
Conference
Language
English
Publisher
ICS2018
Related Researcher
Research Interests

Ocean Circulation,Watermass Analysis,Climate Change,해양순환,수괴분석,기후변화

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse