-
Yuki Okuda, Keisuke Anbiru, Masaaki Kuwahara, Shinya Hashimoto
Pages
1-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hikaru Sakai, Nanae Satou, Kazuma Hamamoto, Yuki Okuda, Shinya Hashimo ...
Pages
2-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takashi Koiso, Kenichi Yamada, Fumiya Fukuda, Yuki Okuda, Shinya Hashi ...
Pages
3-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takuya Saito
Pages
4-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Koichi Watanabe, Liu Yang, Mei Jia Jin, Yu Nagahori, Yoshiyuki Ogata, ...
Pages
5-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Chihiro Miyamoto, Atsushi Matsuki, Takaaki Itai, Yoshio Takahashi
Pages
6-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takehiro Teranishi, Minako Kurisu, Chihiro Miyamoto, Takaaki Itai, Yos ...
Pages
7-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takuto Ando, Yoshinori Iizuka, Hiroshi Ohno
Pages
8-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Akinori Ito
Pages
9-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Gochoobazar Oyunjargal, Koshi Yamamoto, Oidov Munkhtsetseg
Pages
10-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
Atmospheric pollution has become a serious environmental issue in Ulaanbaatar (UB), the capital city of Mongolia, particularly during the winter season. Suspended particulate matter (SPM) samples were collected from January 2014 to January 2018 using a high volume air sampler at the city center. The purpose of this study is to determine the chemical compositions and the possible sources of SPM throughout the year. The concentrations of water-soluble ions and trace metal elements in SPM samples were measured by Ion chromatography and Inductively Coupled Plasma-Mass Spectrometry, respectively.
View full abstract
-
Yuta Suzuki, Koshi Yamamoto, Koichi Mimura
Pages
11-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kimitaka Kawamura, B. Kunwar, D. K. Deshmukh, Petr Vodicka
Pages
12-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yuzo Miyazaki
Pages
13-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Minako Kurisu, Kohei Sakata, Mitsuo Uematsu, Yoshio Takahashi
Pages
14-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Masaharu Tanimizu
Pages
15-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Atsushi Tsuda, Atsushi Ooki
Pages
16-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
There are three areas in the world's oceans where low iron concentration limit the primary production and nutrient concentration is kept high even in summer (Antarctic Ocean, Equatorial upwelling region , subarctic Pacific). The iron fertilization experiment is a friel experiment which add iron to the ocean to promote the primary production and enhance the flux of carbon dioxide in the atmosphere to the ocean. In this presentation, we introduce the outline of three experiments led by Japan (SEEDS, SERIES, SEEDS II). Moreover I will tell about recognition and legal restrictions by international communities on the geoengineering methods including iron fertilization after the series of experiments.
View full abstract
-
Urumu Tsunogai, Yuko Miyoshi, Toshiyuki Matsushita, Masanori Ito, Dais ...
Pages
17-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Leona Higashi, Takeshi Yoshimura, Daisuke Tsumune, Takaki Tsubono, Kaz ...
Pages
18-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Keita Minamikawa, Shun Ito, Fanxing Meng, Naoya Miyashita, Atsushi Ook ...
Pages
19-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hajime Obata, Taejin Kim, Akira Oka, Jun Nishioka, Yohei Yamashita, Hi ...
Pages
20-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kuohong Wong, Hajime Obata, Taejin Kim, Yoshiko Kondo, Jun Nishioka
Pages
21-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
Organic complexation of Cu controls the toxicity and bioavailability of Cu for marine microorganism. Therefore, it is important to reveal the speciation and bioavailability of Cu in the ocean. In this study, we determined the concentrations of Cu and its organic ligands in the soluble (< 0.03 µm) and dissolved (< 0.2 µm) phases in the western (CL-2), central (CL-5) and eastern (CL-16) part of the subarctic North Pacific during the GEOTRACES-Japan cruise GP02 in summer 2017.Concentrations of total dissolved and soluble Cu ranged from 1.28 nM – 4.82 nM, and 0.47 nM – 2.75 nM, respectively. At both CL-2 and CL-16, soluble Cu accounted for 30%-100% of total dissolved Cu. The proportion of the soluble Cu fraction was low in surface waters, increased to maximum in the intermediate waters, and decreased slightly in deep waters. Up to two classes of organic ligands were detected in the surface and intermediate waters, and only one class of ligand was detected in deep waters. Concentrations of the stronger ligands (L1) and weaker ligands (L2) ranged from 1.02 nM – 2.95 nM, and 0.77 nM – 8.78 nM, respectively. The distribution of L1 followed closely that of total dissolved Cu in the surface waters, but no clear trend was observed in the intermediate waters. At CL-2, L1 mainly existed in the soluble phase, whereas for CL-16, soluble L1 accounted for 50% - 100% of total dissolved L1. Concentrations of L2 were relatively constant throughout the water column but elevated concentrations were detected in the surface waters of CL-5 and in the surface and intermediate waters of CL-16. On the other hand, there was a slight depletion of L2 in the intermediate waters of CL-2.
View full abstract
-
Tadateru Noguchi, Jing Zhang, Wenkai Guan, Bingzhang Chen, Meixun Zhao ...
Pages
22-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yuta Isaji, Nanako O. Ogawa, Yoshinori Takano, Chisato Yoshikawa, Haji ...
Pages
23-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Takahito Ikenoue, Katsunori Kimoto, Yusuke Okazaki, Miyako Sato, Makio ...
Pages
24-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hideki Minami, Karin Fukuhara, Yuichi Nosaka, Masahiro Maruo, Hajime O ...
Pages
25-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kana Fujimori, Hirotaka Nishino, Tasuku Akagi
Pages
26-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Katsuhiko suzuki, Junichiro Kuroda, M.L.G. Tejada, Kosuke T. Goto, Wat ...
Pages
27-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yuta Fujiwara, Makoto Tsujisaka, Shotaro Takano, Yoshiki Sohrin
Pages
28-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Tohru Fukazawa, Daichi Asanuma, Hajime Obata, Satoshi Usui, Shiro Mats ...
Pages
29-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Mao Tsuchiya, Shotaro Takano, Makoto Tsujisaka, Shoji Imai, Yuhei Yama ...
Pages
30-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Daichi Asanuma, Yuna Matsubara, Kai Maruyama, Tooru Fukazawa, Kazuhiro ...
Pages
31-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Daisuke Komatsu, Hiromasa Suhara, Ariga Shiori, Hisashi Narita
Pages
32-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hiroshi Amakawa, Hirofumi Tazoe, Katsuhiko Suzuki
Pages
33-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kazuhiro Norisuye, Yuna Matsubara, Masachika Nakagawa, Hajime Obata, K ...
Pages
34-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Tsuyoshi Tanaka, Seung―Gu Lee
Pages
36-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Shigeyuki Wakaki, Yuki Tezuka, Takashi Miyazaki, Keiji Horikawa
Pages
37-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Ryoichi Nakada, Kazuya Nagaishi
Pages
38-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hiroyuki Tsuboi, Takaaki Itai, Yoshio Takahashi
Pages
39-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Mari Shimura
Pages
40-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Ataru Sato, Minori Abe, Masahiko Hada
Pages
41-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Atsunori Nakamura, Takashi Okai, Atsuyuki Ohta
Pages
42-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yoshio Takahashi, Shinya Yamada, Oki Sekizawa, Takaaki Itai, Masato Ta ...
Pages
43-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hiroki Suga, Makoto Nagasawa, Oki Sekizawa, Kiyohumi Nitta, Shinya Yam ...
Pages
44-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Kazumi Ozaki
Pages
45-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yusuke Okazaki
Pages
46-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Yasuhiko T. Yamaguchi, Koichi Shimotori, Akio Imai, Tomoyuki Ohara, Sh ...
Pages
47-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Hiroto Kajita, Hideto Nakamura, Hodaka Kawahata
Pages
48-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Ken Sawada, Chiaki Aoyagi, Madoka Kobayashi, Satoshi Furota, Hideto Na ...
Pages
49-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
-
Haruka Yamaguchi, Minoru Yoneda, Osamu Kondo, Hiromi Shitara, Takeji T ...
Pages
50-
Published: 2019
Released on J-STAGE: November 20, 2019
CONFERENCE PROCEEDINGS
FREE ACCESS
Collagen of human teeth excavated from Jomon and Yayoi sites in Gunma and Nagano was put to carbon and nitrogen stable isotope analysis. There was an average 3.9‰ δ13C increase in the δ13C of Terminal Jomon and Yayoi samples compared to Early-Late Jomon samples. The possible cause of this shift is the consumption of C4 plants with high δ13C such as foxtail and broomcorn millet (C4 millet). Another candidate is marine shellfish with a similarly high δ13C. We built a model to distinguish cereal and marine shellfish consumption based on the difference in the nutrients that collagen and apatite respectively reflect, and the contrasting nutrient makeup of C4 millet and marine shellfish. Carbon isotope values of collagen and the additionally measured apatite were consistent with the mixing model between C3 herbivores and C4 millet, where the contribution of the latter is 20-80%. These results support the archaeological deduction of millet agriculture.
View full abstract