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Long‐term annual primary production in the Ulleung Basin as a biological hot spot in the East/Japan Sea
Author(s) -
Joo HuiTae,
Park Jung Woo,
Son SeungHyun,
Noh JaeHoon,
Jeong JinYong,
Kwak Jung Hyun,
SauxPicart Stephane,
Choi Jung Hwa,
Kang ChangKeun,
Lee Sang Heon
Publication year - 2014
Publication title -
journal of geophysical research: oceans
Language(s) - English
Resource type - Journals
eISSN - 2169-9291
pISSN - 2169-9275
DOI - 10.1002/2014jc009862
Subject(s) - term (time) , structural basin , oceanography , environmental science , primary (astronomy) , production (economics) , climatology , geology , geography , geomorphology , physics , astronomy , economics , macroeconomics , quantum mechanics
Although the Ulleung Basin is an important biological “hot spot” in East/Japan Sea (hereafter the East Sea), very limited knowledge for seasonal and annual variations in the primary productivity exists. In this study, a recent decadal trend of primary production in the Ulleung Basin was analyzed based on MODIS‐derived monthly primary production for a better annual production budget. Based on the MODIS‐derived primary production, the mean daily primary productivity was 766.8 mg C m −2 d −1 (SD = ±196.7 mg C m −2 d −1 ) and the annual primary productivity was 280.2 g C m −2 yr −1 (SD = ±14.9 g C m −2 yr −1 ) in the Ulleung Basin during the study period. The monthly contributions of primary production were not largely variable among different months, and a relatively small interannual production variability was also observed in the Ulleung Basin, which indicates that the Ulleung Basin is a sustaining biologically productive region called as “hot spot” in the East Sea. However, a significant recent decline in the annual primary production was observed in the Ulleung Basin after 2006. Although no strong possibilities were found in this study, the current warming sea surface temperature and a negative phase PDO index were suggested for the recent declining primary production. For a better understanding of subsequent effects on marine ecosystems, more intensive interdisciplinary field studies will be required in the Ulleung Basin.