caa a22 4500 605455287 CHVBK 20210128100211.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10872-015-0314-4 doi (NATIONALLICENCE)springer-10.1007/s10872-015-0314-4 Modeling low salinity waters along the coast around Japan using a high-resolution river discharge dataset [Elektronische Daten] [L. Urakawa, Masao Kurogi, Kei Yoshimura, Hiroyasu Hasumi] The effect of river runoff on the salinity distribution in the coastal regions of Japan is investigated with a nested-grid model system. High-resolution river runoff data calculated by a hydrological cycle model are used in this study. Freshwater fluxes from rivers result in extremely low salinity waters along the coast of Japan. Fixed line observations conducted by prefectural fisheries research institutes show that such low salinity waters also exist in the real ocean. The use of the river runoff data noted above leads to reduction in root mean square errors (RMSEs) of sea surface salinity between observational data and the model result. The model experiments also show that freshwater inputs from large rivers can affect the salinity distribution far away from their mouths, which suggests that we should care about such rivers far away from the area of interest as well as local rivers. The experiment with runoff from non-Class-A rivers shows the smaller RMSE than the experiment without river runoff. Such small rivers also contribute a lot to improving reproducibility of the salinity distribution in the coastal areas. These results clearly show that precise data for river discharge are essential for realistic coastal modeling. The Oceanographic Society of Japan and Springer Japan, 2015 River runoff nationallicence low salinity waters nationallicence coastal modeling nationallicence two-way nested-grid model system nationallicence ocean general circulation model nationallicence Urakawa L. Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut Kurogi Masao Japan Agency for Marine-Earth Science and Technology, 236-0001, Yokohama, Kanagawa, Japan aut Yoshimura Kei Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut Hasumi Hiroyasu Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut Journal of Oceanography Springer Japan 71/6(2015-12-01), 715-739 0916-8370 71:6<715 2015 71 10872 https://doi.org/10.1007/s10872-015-0314-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-015-0314-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Urakawa L. Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut NATIONALLICENCE 700 1- Kurogi Masao Japan Agency for Marine-Earth Science and Technology, 236-0001, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Yoshimura Kei Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut NATIONALLICENCE 700 1- Hasumi Hiroyasu Atmosphere and Ocean Research Institute, The University of Tokyo, 277-8568, Kashiwa, Chiba, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/6(2015-12-01), 715-739 0916-8370 71:6<715 2015 71 10872