Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Ryuji Asami"'
Autor:
Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki, Chuan-Chou Shen, Chung-Che Wu, Xiuyang Jiang, Hideko Takayanagi, Ryuichi Shinjo, Akihiro Kano, Yasufumi Iryu
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
Abstract We applied a new geoarchaeological method with two carbonate archives, which are fossil snails from Sakitari Cave and stalagmites from Gyokusen Cave, on Okinawa Island, Japan, to reconstruct surface air temperature changes over the northwest
Externí odkaz:
https://doaj.org/article/91b96df53b9b4e87a3bd74a85fdb54cb
Autor:
Ryuji Asami, Taketo Matsumori, Ryuichi Shinjo, Ryu Uemura, Yuki Miyaoka, Masaru Mizuyama, Yuji Ise, Takashi Sakamaki
Publikováno v:
Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-16 (2021)
Abstract The geochemistry of calcifying marine organisms is an excellent proxy for reconstructing paleoceanographic history, but studies of hypercalcified demosponges (sclerosponges) are considerably fewer than those of corals, foraminifers, and biva
Externí odkaz:
https://doaj.org/article/02ed95feacd6471e8b71dc04773205a3
Autor:
Ryuji Asami, Akira Kinjo, Daiki Ohshiro, Tohru Naruse, Masaru Mizuyama, Ryu Uemura, Ryuichi Shinjo, Yuji Ise, Yoshihisa Fujita, Takashi Sakamaki
Publikováno v:
Progress in Earth and Planetary Science, Vol 7, Iss 1, Pp 1-18 (2020)
Abstract The geochemistry of the calcium carbonates of marine organisms is an excellent proxy for reconstruction of the paleoceanographic history. However, previous studies of hypercalcified demosponges (sclerosponges) are considerably fewer than tho
Externí odkaz:
https://doaj.org/article/23bb15d343e948f989411630722e6d2b
Publikováno v:
PLoS ONE, Vol 11, Iss 6, p e0157659 (2016)
We report the carbon (δ13C) and oxygen (δ18O) isotope records of three modern Tridacna derasa shells from Ishigaki-jima, southwestern Japan. The high-resolution δ13C profiles of samples from the inner shell layer on cross-sections fall within simi
Externí odkaz:
https://doaj.org/article/b95286df153448ae94da385f9de26360
Publikováno v:
Galaxea, Journal of Coral Reef Studies. 26:1-7
Autor:
Chuan-Chou Shen, Hsun-Ming Hu, Wei Chen, Rastislav Milovský, Monika Orvošová, Ľubica Mareková, Demény Attila, Ryuji Asami, Horng-Sheng Mii, Yu-Tang Chien, Hideko Takayanagi, Yasufumi Iryu, Christoph Spötl
Times of turmoil in Europe during past millennia have been linked to hydroclimate variability. The invasion of foreign peoples that hastened the collapse of the Roman Empire, for example, was suggested to have been triggered by precipitation minima.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18293f437fc55e43c0aca3a1bb57b6a1
https://doi.org/10.21203/rs.3.rs-1463772/v1
https://doi.org/10.21203/rs.3.rs-1463772/v1
Autor:
Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki, Chuan-Chou Shen, Chung-Che Wu, Xiuyang Jiang, Hideko Takayanagi, Ryuichi Shinjo, Akihiro Kano, Yasufumi Iryu
We applied a new geoarchaeological method with two carbonate archives, which are fossil snails from Sakitari Cave and stalagmites from Gyokusen Cave, on Okinawa Island, Japan, to reconstruct surface air temperature changes over the northwestern Pacif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25b19fe57045007830e7510e98bff586
https://doi.org/10.5194/egusphere-egu22-4159
https://doi.org/10.5194/egusphere-egu22-4159
Autor:
Takashi Sakamaki, Yuji Ise, Yuki Miyaoka, Ryu Uemura, Ryuji Asami, Masaru Mizuyama, Ryuichi Shinjo, Taketo Matsumori
Publikováno v:
Progress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-16 (2021)
The geochemistry of calcifying marine organisms is an excellent proxy for reconstructing paleoceanographic history, but studies of hypercalcified demosponges (sclerosponges) are considerably fewer than those of corals, foraminifers, and bivalves. For
Autor:
Ryuji Asami, Yasufumi Iryu, Yoko Saito-Kokubu, Takehiro Mitsuguchi, Tsutomu Yamada, Takahiro Watanabe
Publikováno v:
Radiocarbon. 61:1593-1601
We conducted a preliminary test of the coupled system of an elemental analyzer and the automated graphitization equipment Ionplus AGE3 (EA-AGE3 method) for accelerator mass spectrometry radiocarbon (AMS 14C) measurements of CaCO3 samples, by comparin
Autor:
Thuy Thi Nhu Ha, Satoshi Kodama, Kosuke Yoshii, Ryuji Asami, Osamu Abe, Hideko Takayanagi, Yasufumi Iryu
Publikováno v:
Paleontological Research. 25
We report carbon (δ13C) and oxygen (δ18O) isotope records of two modern giant clam (Tridacna squamosa) shells from two sites (Ishigaki-jima and Okinoerabu-jima) at different latitudes in the Ryukyu Islands, Japan. The δ13C profiles of samples from