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Distribution of 226Ra Radionuclide in Upwelling Event Off Ulsan, Gampo and Pohang, Korea

Atom Indonesia · Vol. 35 No. 2 (2011) · hlm. 137–152

DOI
10.17146/aij.2009.52
ISSN
2356-5322, 0126-1568
Terbit
2011-12-12
Penerbit
National Research and Innovation Agency
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-nc-sa/4.0

Abstrak

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 226Ra 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 (DO) 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 226Ra in the study area, where the 226Ra 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 226Ra 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 226Ra activities also did not decrease after elapsed time of one year, in fact, it increased. However, horizontally the 226Ra 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 226Ra activities and was capable to create homogeneous 226Ra activities from the bottom to the surface in the water column, and the source of 226Ra was likely to originate from outside area (i.e. coastal zone) and bottom area.Received: 25 March 2009; Revised: 24 August 2009; Accepted: 30 September 2009

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  • Diponegoro University
  • Sriwijaya University
  • IPB University
  • National Nuclear Energy Agency of Indonesia
  • National Taiwan Ocean University
  • University of Indonesia
  • Universitas Halu Oleo
  • Organisasi lain
  • Organisasi berbeda
  • Organisasi sama
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Rekan penulisOrganisasiArtikel bersama
Heny SusenoNational Nuclear Energy Agency of Indonesia4
F. RafsaniDiponegoro University1
Sumi HudiyonoUniversity of Indonesia1
Siti SaodahDiponegoro University1
Wahyu Retno PrihatiningsihNational Nuclear Energy Agency of Indonesia1
Chairun Annisa AryantiUniversitas Halu Oleo1
Siti Nurul AiniUniversity of the Ryukyus1
Mochamad SyaifudinSriwijaya University1
Vina ViolitaSriwijaya University1
Mirna FitraniSriwijaya University1
Odang CarmanIPB University1
Dian Eka RamadhaniIPB University1
Andri IskandarIPB University1
Ching‐Fong ChangNational Taiwan Ocean University1
Guan-Chung WuNational Taiwan Ocean University1

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Sumber metadata: OAI-PMH (metadata jurnal) https://atomindonesia.brin.go.id/index.php/aij/oai, pertama di-harvest 8 Nov 2026, terakhir terlihat 8 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Distribution of 226Ra Radionuclide in Upwelling Event Off Ulsan, Gampo and Pohang, Korea</dc:title>
	<dc:creator>Muslim, Muslim</dc:creator>
	<dc:subject xml:lang="en-US">226Ra activity; upwelling event; Ulsan; Gampo; Pohang.</dc:subject>
	<dc:description xml:lang="en-US">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 226Ra 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 (DO) 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 226Ra in the study area, where the 226Ra 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 226Ra 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 226Ra activities also did not decrease after elapsed time of one year, in fact, it increased. However, horizontally the 226Ra 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 226Ra activities and was capable to create homogeneous 226Ra activities from the bottom to the surface in the water column, and the source of 226Ra was likely to originate from outside area (i.e. coastal zone) and bottom area.Received: 25 March 2009; Revised: 24 August 2009; Accepted: 30 September 2009</dc:description>
	<dc:publisher xml:lang="en-US">National Research and Innovation Agency</dc:publisher>
	<dc:contributor xml:lang="en-US">National Nuclear Energy Agency of Indonesia</dc:contributor>
	<dc:date>2011-12-12</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
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	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://atomindonesia.brin.go.id/index.php/aij/article/view/52</dc:identifier>
	<dc:identifier>10.17146/aij.2009.52</dc:identifier>
	<dc:source xml:lang="en-US">Atom Indonesia; Vol 35, No 2 (2009): July 2009; 137-152</dc:source>
	<dc:source>2356-5322</dc:source>
	<dc:source>0126-1568</dc:source>
	<dc:source>10.17146/aij.2009.%x</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://atomindonesia.brin.go.id/index.php/aij/article/view/52/39</dc:relation>
	<dc:relation>https://atomindonesia.brin.go.id/index.php/aij/article/downloadSuppFile/52/726</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2016 Atom Indonesia</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-nc-sa/4.0</dc:rights>
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