Takafumi Aramaki
Biographic Data
| ID | 5598692 |
|---|---|
| NAME | Takafumi Aramaki |
| GIVEN NAMES | Takafumi |
| FAMILY NAME | Aramaki |
| SIGNATURE | ARAMAKI T |
| VERIFIED | No |
| TOTAL WORKS | 6 |
| TOTAL CITATIONS | 3 |
| WORKS AS AUTHOR | 6 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2004 |
| LATEST PUBLICATION YEAR | 2013 |
| H-INDEX | 1 |
Variation of Δ 14 C and δ 13 C Values of Dissolved Humic and Fulvic Acids in the Tokachi River System in Northern Japan
Characteristics of dissolved humic and fulvic acids in river waters were studied during 2003–2005 at 4 sites located in the headwaters and in the upper and lower Tokachi River, including a lowland tributary site. Fulvic acids from the headwaters to downstream areas have similar elemental composition and 13 C-NMR spectra. Humic acids have similar characteristics in the Tokachi River system. In contrast, δ 13 C and Δ 14 C values exhibit a decreasin…
Spatial Distribution of Radiocarbon in the Southwestern Japan/East Sea Immediately After Bottom Water Renewal
In April 2001, immediately after bottom water renewal in the Japan/East Sea, 7 vertical profiles of radiocarbon were obtained from the area, including the Japan Basin and the Tsushima/Ulleung Basin. The bottom water Δ 14 C of the Tsushima/Ulleung Basin increased by 24% during 1979–2001 and was 10–15% higher than the values reported for the Japan Basin and Yamato Basin during 1995–2002. Within the depth interval 800–2000 m, Δ 14 C values at the so…
Spatial Distribution of Radiocarbon in Southwestern Japan and the East Sea Immediately After Bottom Water Renewal
In April 2001, immediately after bottom water renewal in the Japan/East Sea, 7 vertical profiles of radiocarbon were obtained from the area, including the Japan Basin and the Tsushima/Ulleung Basin. The bottom water Δ14C of the Tsushima/Ulleung Basin increased by 24% during 1979–2001 and was 10–15% higher than the values reported for the Japan Basin and Yamato Basin during 1995–2002. Within the depth interval 800–2000 m, Δ14C values at the southe…
Spatial Distribution of Δ 14 C Values of Organic Matter in Surface Sediments Off Saru River in Northern Japan, One Year After a Flood Event in 2006
Dispersion and deposition of terrestrial organic matter by flooding on the inner shelf were studied using C/N ratios, δ 13 C, and Δ 14 C values of sedimentary organic matter. Surface sediment samples (top 2 cm) were collected from coastal areas near the Saru River in southwestern Hokkaido, northern Japan, 1 yr after a flood event in 2006. Riverine suspended solids were also collected at a fixed station downstream during 2006–2008. Sandy sediments…
The Effects of Rainfall on Carbon Isotopes of POC in the Teshio River, Northern Japan
During a rainfall event in early September 2006, the transport behavior of particulate organic carbon (POC) in a small river (Teshio River, northern Japan) with alluvial plain and forest characteristics was investigated chiefly with carbon isotopes. The radiocarbon (Δ 14 C value) of POC varied widely from –56%‰ at the beginning of the rain event to –10%‰ at peak rainfall. The Δ 14 C values have a positive correlation with C/N ratios and a negativ…
Radiocarbon in the Water Column of the Southwestern North Pacific Ocean—24 Years After Geosecs
In the framework of the Worldwide Marine Radioactivity Studies (WOMARS) project, water profile samples for radiocarbon measurements were taken during the IAEA'97 cruise at 10 stations in the southwestern North Pacific Ocean. While 14 C concentrations were rapidly decreasing from the surface (Δ 14 C about 100‰) down to about 800 m at all visited stations (Δ 14 C about −200‰), the concentrations below 1000 m were almost constant. Some stations were…
Radiocarbon in the Water Column of the Southwestern North Pacific Ocean—24 Years After Geosecs
In the framework of the Worldwide Marine Radioactivity Studies (WOMARS) project, water profile samples for radiocarbon measurements were taken during the IAEA'97 cruise at 10 stations in the southwestern North Pacific Ocean. While 14 C concentrations were rapidly decreasing from the surface (Δ 14 C about 100‰) down to about 800 m at all visited stations (Δ 14 C about −200‰), the concentrations below 1000 m were almost constant. Some stations were…
Radiocarbon in the Water Column of the Southwestern North Pacific Ocean—24 Years After Geosecs
In the framework of the Worldwide Marine Radioactivity Studies (WOMARS) project, water profile samples for radiocarbon measurements were taken during the IAEA'97 cruise at 10 stations in the southwestern North Pacific Ocean. While 14 C concentrations were rapidly decreasing from the surface (Δ 14 C about 100‰) down to about 800 m at all visited stations (Δ 14 C about −200‰), the concentrations below 1000 m were almost constant. Some stations were…
Spatial Distribution of Δ 14 C Values of Organic Matter in Surface Sediments Off Saru River in Northern Japan, One Year After a Flood Event in 2006
Dispersion and deposition of terrestrial organic matter by flooding on the inner shelf were studied using C/N ratios, δ 13 C, and Δ 14 C values of sedimentary organic matter. Surface sediment samples (top 2 cm) were collected from coastal areas near the Saru River in southwestern Hokkaido, northern Japan, 1 yr after a flood event in 2006. Riverine suspended solids were also collected at a fixed station downstream during 2006–2008. Sandy sediments…
The Effects of Rainfall on Carbon Isotopes of POC in the Teshio River, Northern Japan
During a rainfall event in early September 2006, the transport behavior of particulate organic carbon (POC) in a small river (Teshio River, northern Japan) with alluvial plain and forest characteristics was investigated chiefly with carbon isotopes. The radiocarbon (Δ 14 C value) of POC varied widely from –56%‰ at the beginning of the rain event to –10%‰ at peak rainfall. The Δ 14 C values have a positive correlation with C/N ratios and a negativ…
Variation of Δ 14 C and δ 13 C Values of Dissolved Humic and Fulvic Acids in the Tokachi River System in Northern Japan
Characteristics of dissolved humic and fulvic acids in river waters were studied during 2003–2005 at 4 sites located in the headwaters and in the upper and lower Tokachi River, including a lowland tributary site. Fulvic acids from the headwaters to downstream areas have similar elemental composition and 13 C-NMR spectra. Humic acids have similar characteristics in the Tokachi River system. In contrast, δ 13 C and Δ 14 C values exhibit a decreasin…
Spatial Distribution of Radiocarbon in the Southwestern Japan/East Sea Immediately After Bottom Water Renewal
In April 2001, immediately after bottom water renewal in the Japan/East Sea, 7 vertical profiles of radiocarbon were obtained from the area, including the Japan Basin and the Tsushima/Ulleung Basin. The bottom water Δ 14 C of the Tsushima/Ulleung Basin increased by 24% during 1979–2001 and was 10–15% higher than the values reported for the Japan Basin and Yamato Basin during 1995–2002. Within the depth interval 800–2000 m, Δ 14 C values at the so…
Spatial Distribution of Radiocarbon in Southwestern Japan and the East Sea Immediately After Bottom Water Renewal
In April 2001, immediately after bottom water renewal in the Japan/East Sea, 7 vertical profiles of radiocarbon were obtained from the area, including the Japan Basin and the Tsushima/Ulleung Basin. The bottom water Δ14C of the Tsushima/Ulleung Basin increased by 24% during 1979–2001 and was 10–15% higher than the values reported for the Japan Basin and Yamato Basin during 1995–2002. Within the depth interval 800–2000 m, Δ14C values at the southe…
Geology (6 works) · Isotope Analysis in Ecology (6 works) · Environmental Science (5 works) · Chemistry (4 works) · Environmental Chemistry (4 works) · Geography (4 works) · Geology and Paleoclimatology Research (4 works) · Geomorphology (4 works) · Radiocarbon dating (4 works) · Marine and coastal ecosystems (3 works)