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Methane in the western part of the Sea of Okhotsk in 1998-2000
We measured oceanic methane in the western part of the Sea of Okhotsk in 1998, 1999, and 2000. An anomalously high methane concentration was found in near‐bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg...
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Published in: | Journal of Geophysical Research. C. Oceans 2004-09, Vol.109 (C9), p.C09S12.1-n/a |
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container_issue | C9 |
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container_title | Journal of Geophysical Research. C. Oceans |
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creator | Yoshida, Osamu Inoue, Hisayuki Y. Watanabe, Shuichi Noriki, Shinichiro Wakatsuchi, Masaaki |
description | We measured oceanic methane in the western part of the Sea of Okhotsk in 1998, 1999, and 2000. An anomalously high methane concentration was found in near‐bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg−1 in 2000. This anomalously high concentration can be used to trace the water with density range 26.6 to 26.8 σθ in the upper Dense Shelf Water. In the shelf off east Sakhalin, a strong stratification caused by freshwater from Amur River controlled the upward transport of methane through the suppression of vertical convection. The calculated methane flux was largest in the northeastern shelf region of Sakhalin (88 mol CH4 km−2 d−1). In the western part of the Sea of Okhotsk (0.73 × 106 km2, 51% of total Sea of Okhotsk area), the emission rate of methane was 11 Gg CH4 yr−1. |
doi_str_mv | 10.1029/2003JC001910 |
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An anomalously high methane concentration was found in near‐bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg−1 in 2000. This anomalously high concentration can be used to trace the water with density range 26.6 to 26.8 σθ in the upper Dense Shelf Water. In the shelf off east Sakhalin, a strong stratification caused by freshwater from Amur River controlled the upward transport of methane through the suppression of vertical convection. The calculated methane flux was largest in the northeastern shelf region of Sakhalin (88 mol CH4 km−2 d−1). 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Oceans, 2004-09, Vol.109 (C9), p.C09S12.1-n/a</ispartof><rights>Copyright 2004 by the American Geophysical Union.</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a5681-ae1f1471d96ed3f06aef27206f18e92da1eb2f32964dff15f49750cdb2b9d6e33</citedby><cites>FETCH-LOGICAL-a5681-ae1f1471d96ed3f06aef27206f18e92da1eb2f32964dff15f49750cdb2b9d6e33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2003JC001910$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2003JC001910$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,11514,27924,27925,46468,46892</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16240078$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yoshida, Osamu</creatorcontrib><creatorcontrib>Inoue, Hisayuki Y.</creatorcontrib><creatorcontrib>Watanabe, Shuichi</creatorcontrib><creatorcontrib>Noriki, Shinichiro</creatorcontrib><creatorcontrib>Wakatsuchi, Masaaki</creatorcontrib><title>Methane in the western part of the Sea of Okhotsk in 1998-2000</title><title>Journal of Geophysical Research. C. Oceans</title><addtitle>J. Geophys. Res</addtitle><description>We measured oceanic methane in the western part of the Sea of Okhotsk in 1998, 1999, and 2000. An anomalously high methane concentration was found in near‐bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg−1 in 2000. This anomalously high concentration can be used to trace the water with density range 26.6 to 26.8 σθ in the upper Dense Shelf Water. In the shelf off east Sakhalin, a strong stratification caused by freshwater from Amur River controlled the upward transport of methane through the suppression of vertical convection. The calculated methane flux was largest in the northeastern shelf region of Sakhalin (88 mol CH4 km−2 d−1). In the western part of the Sea of Okhotsk (0.73 × 106 km2, 51% of total Sea of Okhotsk area), the emission rate of methane was 11 Gg CH4 yr−1.</description><subject>chemical tracer</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>flux</subject><subject>Freshwater</subject><subject>Marine</subject><subject>methane</subject><subject>Sea of Okhotsk</subject><issn>0148-0227</issn><issn>2169-9275</issn><issn>2156-2202</issn><issn>2169-9291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFkUFP4zAQhS0E0laFGz8gFxAHAjPjxI4vK6Fqt1AVWC2gPVpuYquhoSl2KuDf41AEewJfbI2-9-bpmbF9hBMEUqcEwCcjAFQIW2xAmIuUCGibDQCzIgUi-YPthXAP8WS5yAAH7Oel7eZmaZN6mXRzmzzZ0Fm_TFbGd0nr3mY31vTP68W87cKiJ1GpIo0LYZftONMEu_d-D9nd71-3o_N0ej2-GJ1NU5OLAlNj0WEmsVLCVtyBMNaRJBAOC6uoMmhn5DgpkVXOYe4yJXMoqxnNVCUs50N2uPFd-fZxHTPqhzqUtmli9HYdNBUkchkbGLKjL8HYjlJCkcJvPVEKECD75ccbsPRtCN46vfL1g_EvGkH33ev_u4_4wbuvCaVpnDfLsg6fGkEZgCwiRxvuqW7sy5eeejL-O1K86EOnG1Ed_-n5Q2T8QgvJZa7_XY21-sMJCaSW_BXwFJvU</recordid><startdate>200409</startdate><enddate>200409</enddate><creator>Yoshida, Osamu</creator><creator>Inoue, Hisayuki Y.</creator><creator>Watanabe, Shuichi</creator><creator>Noriki, Shinichiro</creator><creator>Wakatsuchi, Masaaki</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>200409</creationdate><title>Methane in the western part of the Sea of Okhotsk in 1998-2000</title><author>Yoshida, Osamu ; Inoue, Hisayuki Y. ; Watanabe, Shuichi ; Noriki, Shinichiro ; Wakatsuchi, Masaaki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5681-ae1f1471d96ed3f06aef27206f18e92da1eb2f32964dff15f49750cdb2b9d6e33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>chemical tracer</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>flux</topic><topic>Freshwater</topic><topic>Marine</topic><topic>methane</topic><topic>Sea of Okhotsk</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yoshida, Osamu</creatorcontrib><creatorcontrib>Inoue, Hisayuki Y.</creatorcontrib><creatorcontrib>Watanabe, Shuichi</creatorcontrib><creatorcontrib>Noriki, Shinichiro</creatorcontrib><creatorcontrib>Wakatsuchi, Masaaki</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of Geophysical Research. C. Oceans</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yoshida, Osamu</au><au>Inoue, Hisayuki Y.</au><au>Watanabe, Shuichi</au><au>Noriki, Shinichiro</au><au>Wakatsuchi, Masaaki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Methane in the western part of the Sea of Okhotsk in 1998-2000</atitle><jtitle>Journal of Geophysical Research. C. Oceans</jtitle><addtitle>J. Geophys. Res</addtitle><date>2004-09</date><risdate>2004</risdate><volume>109</volume><issue>C9</issue><spage>C09S12.1</spage><epage>n/a</epage><pages>C09S12.1-n/a</pages><issn>0148-0227</issn><issn>2169-9275</issn><eissn>2156-2202</eissn><eissn>2169-9291</eissn><abstract>We measured oceanic methane in the western part of the Sea of Okhotsk in 1998, 1999, and 2000. An anomalously high methane concentration was found in near‐bottom water above the shelfbreak (∼200 m) off northeast Sakhalin every year: up to 488 nmol kg−1 in 1998, 981 nmol kg−1 in 1999, and 556 nmol kg−1 in 2000. This anomalously high concentration can be used to trace the water with density range 26.6 to 26.8 σθ in the upper Dense Shelf Water. In the shelf off east Sakhalin, a strong stratification caused by freshwater from Amur River controlled the upward transport of methane through the suppression of vertical convection. The calculated methane flux was largest in the northeastern shelf region of Sakhalin (88 mol CH4 km−2 d−1). In the western part of the Sea of Okhotsk (0.73 × 106 km2, 51% of total Sea of Okhotsk area), the emission rate of methane was 11 Gg CH4 yr−1.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2003JC001910</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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subjects | chemical tracer Earth, ocean, space Exact sciences and technology flux Freshwater Marine methane Sea of Okhotsk |
title | Methane in the western part of the Sea of Okhotsk in 1998-2000 |
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