@article{oai:niigata-u.repo.nii.ac.jp:00006875, author = {Matsuoka, Atsushi and Yoshida, Kazuhiro and Hasegawa, Satoshi and Shinzawa, Midori and Tamura, Kazutoshi and Sakumoto, Tatsuya and Yabe, Hideo and Niikawa, Isao and Tateishi, Masaaki}, journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)}, month = {Mar}, note = {The water temperature profile in early September off Tassha, Sado Island, is well stratified. The uppermost 20-30 m layer in water column has a homogenous temperature of ca. 27℃. This layer corresponds to well mixed surface water. The surface layer is underlain by a water mass with a temperature gradient of ca. 1.6℃/10 m. This water mass corresponds to the upper part of thermocline. The temperature at the deepest (100 m) two sites was 15.3℃ and 15.4℃, respectively. Radiolarian abundance correlates well with the water temperature profile. Few radiolarian individuals were obtained in surface (0-10 m) tows, while deep tow (up to 150m deep) samples generally contained rich radiolarian faunas. The faunal association is similar to that of the Kuroshio Warm Current but species diversity is much lower. This may be the result of a sorting effect associated with branching of the Tsushima Current from the Kuroshio Current. No cold water species indigenous to deep waters in the Sea of Japan were recovered.}, pages = {83--93}, title = {Temperature profile and radiolarian fauna in surface waters off Tassha, Aikawa Town, Sado Island, central Japan}, volume = {16}, year = {2001} }