Layanan journal yang disediakan oleh Perpustakaan Universitas Gunadarma
| Judul Artikel | : | DISTRIBUTION OF 226Ra RADIONUCLIDE IN UPWELLING EVENT OFF ULSAN, GAMPOANDPOHANG,KOREA |
|---|---|---|
| Judul Terbitan | : | Atom Indonesia |
| ISSN | : | 0126-1568 |
| Bahasa | : | ENG |
| Tempat Terbit | : | Jakarta |
| Tahun | : | 0000 |
| Volume | : | Vol. 35 Issue 2 0000 |
| Penerbit | : | BATAN Puspitek Serpong |
| Frekuensi Penerbitan | : | 2x per Tahun |
| Penulis | : | Muslim' |
| Abstraksi | : | DISTRIBUTION OF 226Ra RADlONUCLlDE IN UPWELLING EVENT OFF ULSAN, GAMPO AND POHANG, KOREA. Upwelling is an important event in the sea for it makes the area to become more productive. The objective of this study is to determine the distribution of radium-226 as radiotoxic in the upwelling area in the summer season. Measurements of the horizontal and vertical activities of 22('Ra in the Ulsan, Gampo and Pohang waters were conducted in June, August 1999 and June 2000 when the upwelling event was expected to occur. Water temperature, salinity and dissolved oxygen (~O) were also measured concurrently. The thermocline layer or the layer where the temperature decreased drastically occurred at a depth between 30 m to 100 m for samples dated June 1999 and 30 m to more than 100 m for samples dated August 1999 and June 2000. The salinity decreased with depth but the DO concentration increased in this layer. The condition affected the vertical distribution of 22('Ra in the study area, where the 22(,Ra activities showed to be relatively homogeneous vertically in each station. This indicates that the upwelling which occurred in the study area was capable to distribute the m'Ra activities from the bottom to the surface. Thus, the 226Ra distribution at that time did not increase with depth, opposite to what usually occurs in the ocean at normal condition. The l2(,Ra activities also did not decrease after elapsed time of one year, in fact, it increased. However, horizontally the 22('Ra activities decreased with increasing distance from the coastal zone. Based on these results, it can be concluded that the upwelling event in the Ulsan, Gampo and Pohang was effective for increasing the 22('Ra activities and was capable to create homogeneous m'Ra activities from the bottom to the surface in the water column, and the source of 22(,Ra was likely to originate from outside area (i.e coastal zone) and bottom area |
| Kata Kunci | : | 22I>Ra activity; upwelling event; Ulsan; Gampo; Pohang. |
| Lokasi | : | P137 |
| Terakreditasi | : | belum |