Japan Geoscience Union Meeting 2015

Presentation information


Symbol A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG33] Land-Ocean Interaction -Water and material cycle for coastal ecosystems-

Tue. May 26, 2015 9:00 AM - 10:45 AM 202 (2F)

Convener:*Ryo Sugimoto(Faculty of Marine Biosciences, Fukui Prefectural University), Makoto Yamada(Research Institute for Humanity and Nature), Masahiko Ono(National Institute of Advanced Industrial Science and Technology), Jun Shoji(Hiroshima University), Chair:Ryo Sugimoto(Faculty of Marine Biosciences, Fukui Prefectural University), Jun Shoji(Hiroshima University)

10:21 AM - 10:36 AM

[ACG33-06] The influence of groundwater discharge on primary production in a shallow coastal sea, Obama bay,Japan

*Shiho KOBAYASHI1, Ryo SUGIMOTO2, Youji MIYATA1, Hisami HONDA3, Makoto YAMADA3, Osamu TOMINAGA2, Daisuke TAHARA2, Jun SHOJI4, Makoto TANIGUCHI3 (1.Kyoto University, 2.Fukui Prefectural University, 3.Research Institute for Humanity and Nature, 4.Hiroshima University)

Keywords:land-ocean interaction, submarine groundwater discharge, costal ecosystem, primary production

Submarine groundwater discharge (SGD) often influences on biogeochemical properties in coastal seas. We observed spatial and temporal variations in SGD using 222Rn and seepage meter along the shoreline of Obama bay, Japan. The results showed SGD exists even in the shallow sea adjacent to the small water catchment area (~ 1 km2), where the range of the tide is relatively small (10 ~ 30 cm). The spatial and temporal variations in chlorophyll observed at the same time suggest that the SGD influences on primary production.