Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition
In an especially dry year (2006) in the Changjiang Estuary, three cruises were conducted between June and October, to study the process of oxygen depletion. Data for the hypoxic zone pooled for 1959 through 2006 suggest that a dramatic increase in the area of hypoxia has occurred in recent years, an...
Gespeichert in:
| Veröffentlicht in: | Marine chemistry 2011-07, Vol.125 (1), p.108-116 |
|---|---|
| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 116 |
|---|---|
| container_issue | 1 |
| container_start_page | 108 |
| container_title | Marine chemistry |
| container_volume | 125 |
| creator | Zhu, Zhuo-Yi Zhang, Jing Wu, Ying Zhang, Ying-Ying Lin, Jing Liu, Su-Mei |
| description | In an especially dry year (2006) in the Changjiang Estuary, three cruises were conducted between June and October, to study the process of oxygen depletion. Data for the hypoxic zone pooled for 1959 through 2006 suggest that a dramatic increase in the area of hypoxia has occurred in recent years, and that the center of hypoxia moved northwards in 2006. In August, the hypoxic area (dissolved oxygen, or DO, <
62.5
μM) in the northern region was 15,400
km
2, which is comparable to that in the Gulf of Mexico. A large area of low DO (62.5
μM
<
DO
<
94
μM) also was found in the southern region. In near-bottom waters, particulate organic carbon (POC), dissolved inorganic phosphorus (DIP), dissolved inorganic nitrogen (DIN) and apparent oxygen utilization (AOU) showed coupled variation. For example, relationships can be found between AOU and POC/nutrients (POC/DIP: r
=
−0.47, POC/DIN: r
=
−0.50; p
<
0.001, n
=
86), and between AOU and Δσ of the water column (r
=
0.66, p
<
0.001, n
=
86; Δσ
=
density
near-bottom waters
−
density
surface waters). It is interesting that oxygen depletion in the northern and southern regions developed separately, and they showed distinct differences. Oxygen depletion in the southern region is milder and relatively long lived, whereas in the northern region it is more pronounced and short lived. The different relationships between AOU and inorganic nutrients, indicates different mechanisms for the occurrence of oxygen depletion between the southern and northern regions, respectively. This can be due to 1) the influence of dissolved organic nutrients as another decomposition product besides inorganic forms, 2) and/or different chemical composition of organic matter that decomposed in the near-bottom waters.
► Near-bottom water samples show relationships between AOU and POC/DIP, and POC/DIN. ► Bottom AOU and water column stratification show positive relationships. ► The center of hypoxia is moving northwards in 2006, relative to the past. ► Southern and northern regions show different coupling of bottom AOU and nutrients. |
| doi_str_mv | 10.1016/j.marchem.2011.03.005 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_876229175</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0304420311000351</els_id><sourcerecordid>1770363259</sourcerecordid><originalsourceid>FETCH-LOGICAL-c470t-f92e4656c94cd998febba009d5f95547cf240568fa20a7f05f319ef467ab7d533</originalsourceid><addsrcrecordid>eNqFkU-LFDEQxRtRcFz9CEIu4nrotvKv0_EiMqyusLAgevAUMunKTIbuTpv0LDt-ejPM4FEvrw71e1XwXlW9ptBQoO37fTPa5HY4NgwobYA3APJJtaKdYrWSHX1arYCDqAUD_rx6kfMeAFou9arC2-McH4Ml0Xuy7JCsd3ba7kMRcv2z6PIbybfwgOkducnLwabjB3L_eNziRHqcB1xCnIidehLT1k7BkdEuC6aydHGcYw4n4GX1zNsh46vLvKp-fL75vr6t7-6_fF1_uqudULDUXjMUrWydFq7XuvO42VgA3UuvpRTKeSZAtp23DKzyID2nGr1old2oXnJ-Vb09351T_HXAvJgxZIfDYCeMh2w61TKmqZKFvP4nSZUC3nImdUHlGXUp5pzQmzmFkvjRUDCnAszeXAowpwIMcFMKKL43lxc2Ozv4ZCcX8l8zE7TTQnSF-3jmsCTzEDCZ7AJODvuQ0C2mj-E_n_4A3WqewQ</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1770363259</pqid></control><display><type>article</type><title>Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Zhu, Zhuo-Yi ; Zhang, Jing ; Wu, Ying ; Zhang, Ying-Ying ; Lin, Jing ; Liu, Su-Mei</creator><creatorcontrib>Zhu, Zhuo-Yi ; Zhang, Jing ; Wu, Ying ; Zhang, Ying-Ying ; Lin, Jing ; Liu, Su-Mei</creatorcontrib><description>In an especially dry year (2006) in the Changjiang Estuary, three cruises were conducted between June and October, to study the process of oxygen depletion. Data for the hypoxic zone pooled for 1959 through 2006 suggest that a dramatic increase in the area of hypoxia has occurred in recent years, and that the center of hypoxia moved northwards in 2006. In August, the hypoxic area (dissolved oxygen, or DO, <
62.5
μM) in the northern region was 15,400
km
2, which is comparable to that in the Gulf of Mexico. A large area of low DO (62.5
μM
<
DO
<
94
μM) also was found in the southern region. In near-bottom waters, particulate organic carbon (POC), dissolved inorganic phosphorus (DIP), dissolved inorganic nitrogen (DIN) and apparent oxygen utilization (AOU) showed coupled variation. For example, relationships can be found between AOU and POC/nutrients (POC/DIP: r
=
−0.47, POC/DIN: r
=
−0.50; p
<
0.001, n
=
86), and between AOU and Δσ of the water column (r
=
0.66, p
<
0.001, n
=
86; Δσ
=
density
near-bottom waters
−
density
surface waters). It is interesting that oxygen depletion in the northern and southern regions developed separately, and they showed distinct differences. Oxygen depletion in the southern region is milder and relatively long lived, whereas in the northern region it is more pronounced and short lived. The different relationships between AOU and inorganic nutrients, indicates different mechanisms for the occurrence of oxygen depletion between the southern and northern regions, respectively. This can be due to 1) the influence of dissolved organic nutrients as another decomposition product besides inorganic forms, 2) and/or different chemical composition of organic matter that decomposed in the near-bottom waters.
► Near-bottom water samples show relationships between AOU and POC/DIP, and POC/DIN. ► Bottom AOU and water column stratification show positive relationships. ► The center of hypoxia is moving northwards in 2006, relative to the past. ► Southern and northern regions show different coupling of bottom AOU and nutrients.</description><identifier>ISSN: 0304-4203</identifier><identifier>EISSN: 1872-7581</identifier><identifier>DOI: 10.1016/j.marchem.2011.03.005</identifier><identifier>CODEN: MRCHBD</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Brackish ; Carbon ; Changjiang Estuary ; Decomposition ; Depletion ; Dipping ; Dissolution ; Earth sciences ; Earth, ocean, space ; Estuaries ; Exact sciences and technology ; External geophysics ; Freshwater ; Geochemistry ; Hypoxia ; Marine ; Mineralogy ; Nutrients ; Organic matter decomposition ; Physical and chemical properties of sea water ; Physics of the oceans ; Silicates ; Stratification ; Water geochemistry</subject><ispartof>Marine chemistry, 2011-07, Vol.125 (1), p.108-116</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c470t-f92e4656c94cd998febba009d5f95547cf240568fa20a7f05f319ef467ab7d533</citedby><cites>FETCH-LOGICAL-c470t-f92e4656c94cd998febba009d5f95547cf240568fa20a7f05f319ef467ab7d533</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.marchem.2011.03.005$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24189448$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhu, Zhuo-Yi</creatorcontrib><creatorcontrib>Zhang, Jing</creatorcontrib><creatorcontrib>Wu, Ying</creatorcontrib><creatorcontrib>Zhang, Ying-Ying</creatorcontrib><creatorcontrib>Lin, Jing</creatorcontrib><creatorcontrib>Liu, Su-Mei</creatorcontrib><title>Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition</title><title>Marine chemistry</title><description>In an especially dry year (2006) in the Changjiang Estuary, three cruises were conducted between June and October, to study the process of oxygen depletion. Data for the hypoxic zone pooled for 1959 through 2006 suggest that a dramatic increase in the area of hypoxia has occurred in recent years, and that the center of hypoxia moved northwards in 2006. In August, the hypoxic area (dissolved oxygen, or DO, <
62.5
μM) in the northern region was 15,400
km
2, which is comparable to that in the Gulf of Mexico. A large area of low DO (62.5
μM
<
DO
<
94
μM) also was found in the southern region. In near-bottom waters, particulate organic carbon (POC), dissolved inorganic phosphorus (DIP), dissolved inorganic nitrogen (DIN) and apparent oxygen utilization (AOU) showed coupled variation. For example, relationships can be found between AOU and POC/nutrients (POC/DIP: r
=
−0.47, POC/DIN: r
=
−0.50; p
<
0.001, n
=
86), and between AOU and Δσ of the water column (r
=
0.66, p
<
0.001, n
=
86; Δσ
=
density
near-bottom waters
−
density
surface waters). It is interesting that oxygen depletion in the northern and southern regions developed separately, and they showed distinct differences. Oxygen depletion in the southern region is milder and relatively long lived, whereas in the northern region it is more pronounced and short lived. The different relationships between AOU and inorganic nutrients, indicates different mechanisms for the occurrence of oxygen depletion between the southern and northern regions, respectively. This can be due to 1) the influence of dissolved organic nutrients as another decomposition product besides inorganic forms, 2) and/or different chemical composition of organic matter that decomposed in the near-bottom waters.
► Near-bottom water samples show relationships between AOU and POC/DIP, and POC/DIN. ► Bottom AOU and water column stratification show positive relationships. ► The center of hypoxia is moving northwards in 2006, relative to the past. ► Southern and northern regions show different coupling of bottom AOU and nutrients.</description><subject>Brackish</subject><subject>Carbon</subject><subject>Changjiang Estuary</subject><subject>Decomposition</subject><subject>Depletion</subject><subject>Dipping</subject><subject>Dissolution</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Estuaries</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Freshwater</subject><subject>Geochemistry</subject><subject>Hypoxia</subject><subject>Marine</subject><subject>Mineralogy</subject><subject>Nutrients</subject><subject>Organic matter decomposition</subject><subject>Physical and chemical properties of sea water</subject><subject>Physics of the oceans</subject><subject>Silicates</subject><subject>Stratification</subject><subject>Water geochemistry</subject><issn>0304-4203</issn><issn>1872-7581</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkU-LFDEQxRtRcFz9CEIu4nrotvKv0_EiMqyusLAgevAUMunKTIbuTpv0LDt-ejPM4FEvrw71e1XwXlW9ptBQoO37fTPa5HY4NgwobYA3APJJtaKdYrWSHX1arYCDqAUD_rx6kfMeAFou9arC2-McH4Ml0Xuy7JCsd3ba7kMRcv2z6PIbybfwgOkducnLwabjB3L_eNziRHqcB1xCnIidehLT1k7BkdEuC6aydHGcYw4n4GX1zNsh46vLvKp-fL75vr6t7-6_fF1_uqudULDUXjMUrWydFq7XuvO42VgA3UuvpRTKeSZAtp23DKzyID2nGr1old2oXnJ-Vb09351T_HXAvJgxZIfDYCeMh2w61TKmqZKFvP4nSZUC3nImdUHlGXUp5pzQmzmFkvjRUDCnAszeXAowpwIMcFMKKL43lxc2Ozv4ZCcX8l8zE7TTQnSF-3jmsCTzEDCZ7AJODvuQ0C2mj-E_n_4A3WqewQ</recordid><startdate>20110720</startdate><enddate>20110720</enddate><creator>Zhu, Zhuo-Yi</creator><creator>Zhang, Jing</creator><creator>Wu, Ying</creator><creator>Zhang, Ying-Ying</creator><creator>Lin, Jing</creator><creator>Liu, Su-Mei</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>7QH</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>20110720</creationdate><title>Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition</title><author>Zhu, Zhuo-Yi ; Zhang, Jing ; Wu, Ying ; Zhang, Ying-Ying ; Lin, Jing ; Liu, Su-Mei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c470t-f92e4656c94cd998febba009d5f95547cf240568fa20a7f05f319ef467ab7d533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Brackish</topic><topic>Carbon</topic><topic>Changjiang Estuary</topic><topic>Decomposition</topic><topic>Depletion</topic><topic>Dipping</topic><topic>Dissolution</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Estuaries</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Freshwater</topic><topic>Geochemistry</topic><topic>Hypoxia</topic><topic>Marine</topic><topic>Mineralogy</topic><topic>Nutrients</topic><topic>Organic matter decomposition</topic><topic>Physical and chemical properties of sea water</topic><topic>Physics of the oceans</topic><topic>Silicates</topic><topic>Stratification</topic><topic>Water geochemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhu, Zhuo-Yi</creatorcontrib><creatorcontrib>Zhang, Jing</creatorcontrib><creatorcontrib>Wu, Ying</creatorcontrib><creatorcontrib>Zhang, Ying-Ying</creatorcontrib><creatorcontrib>Lin, Jing</creatorcontrib><creatorcontrib>Liu, Su-Mei</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Aqualine</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</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><jtitle>Marine chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhu, Zhuo-Yi</au><au>Zhang, Jing</au><au>Wu, Ying</au><au>Zhang, Ying-Ying</au><au>Lin, Jing</au><au>Liu, Su-Mei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition</atitle><jtitle>Marine chemistry</jtitle><date>2011-07-20</date><risdate>2011</risdate><volume>125</volume><issue>1</issue><spage>108</spage><epage>116</epage><pages>108-116</pages><issn>0304-4203</issn><eissn>1872-7581</eissn><coden>MRCHBD</coden><abstract>In an especially dry year (2006) in the Changjiang Estuary, three cruises were conducted between June and October, to study the process of oxygen depletion. Data for the hypoxic zone pooled for 1959 through 2006 suggest that a dramatic increase in the area of hypoxia has occurred in recent years, and that the center of hypoxia moved northwards in 2006. In August, the hypoxic area (dissolved oxygen, or DO, <
62.5
μM) in the northern region was 15,400
km
2, which is comparable to that in the Gulf of Mexico. A large area of low DO (62.5
μM
<
DO
<
94
μM) also was found in the southern region. In near-bottom waters, particulate organic carbon (POC), dissolved inorganic phosphorus (DIP), dissolved inorganic nitrogen (DIN) and apparent oxygen utilization (AOU) showed coupled variation. For example, relationships can be found between AOU and POC/nutrients (POC/DIP: r
=
−0.47, POC/DIN: r
=
−0.50; p
<
0.001, n
=
86), and between AOU and Δσ of the water column (r
=
0.66, p
<
0.001, n
=
86; Δσ
=
density
near-bottom waters
−
density
surface waters). It is interesting that oxygen depletion in the northern and southern regions developed separately, and they showed distinct differences. Oxygen depletion in the southern region is milder and relatively long lived, whereas in the northern region it is more pronounced and short lived. The different relationships between AOU and inorganic nutrients, indicates different mechanisms for the occurrence of oxygen depletion between the southern and northern regions, respectively. This can be due to 1) the influence of dissolved organic nutrients as another decomposition product besides inorganic forms, 2) and/or different chemical composition of organic matter that decomposed in the near-bottom waters.
► Near-bottom water samples show relationships between AOU and POC/DIP, and POC/DIN. ► Bottom AOU and water column stratification show positive relationships. ► The center of hypoxia is moving northwards in 2006, relative to the past. ► Southern and northern regions show different coupling of bottom AOU and nutrients.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.marchem.2011.03.005</doi><tpages>9</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0304-4203 |
| ispartof | Marine chemistry, 2011-07, Vol.125 (1), p.108-116 |
| issn | 0304-4203 1872-7581 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_876229175 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Brackish Carbon Changjiang Estuary Decomposition Depletion Dipping Dissolution Earth sciences Earth, ocean, space Estuaries Exact sciences and technology External geophysics Freshwater Geochemistry Hypoxia Marine Mineralogy Nutrients Organic matter decomposition Physical and chemical properties of sea water Physics of the oceans Silicates Stratification Water geochemistry |
| title | Hypoxia off the Changjiang (Yangtze River) Estuary: Oxygen depletion and organic matter decomposition |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-06T10%3A44%3A54IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Hypoxia%20off%20the%20Changjiang%20(Yangtze%20River)%20Estuary:%20Oxygen%20depletion%20and%20organic%20matter%20decomposition&rft.jtitle=Marine%20chemistry&rft.au=Zhu,%20Zhuo-Yi&rft.date=2011-07-20&rft.volume=125&rft.issue=1&rft.spage=108&rft.epage=116&rft.pages=108-116&rft.issn=0304-4203&rft.eissn=1872-7581&rft.coden=MRCHBD&rft_id=info:doi/10.1016/j.marchem.2011.03.005&rft_dat=%3Cproquest_cross%3E1770363259%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1770363259&rft_id=info:pmid/&rft_els_id=S0304420311000351&rfr_iscdi=true |