Spatial predictions of sea surface dimethylsulfide concentrations in the high arctic
The climatically-important compound dimethylsulfide (DMS) has been reported to be abundant in the Arctic, particularly in the marginal sea ice zone. Due to these high concentrations, it may play an important role in climate control. A DMS monthly climatology for July through October was created empl...
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| Veröffentlicht in: | Biogeochemistry 2012-09, Vol.110 (1/3), p.287-301 |
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| description | The climatically-important compound dimethylsulfide (DMS) has been reported to be abundant in the Arctic, particularly in the marginal sea ice zone. Due to these high concentrations, it may play an important role in climate control. A DMS monthly climatology for July through October was created employing various ocean characteristics and spatial modeling techniques commonly used for describing species distributions in ecology. Comparisons between observed and predicted values of surface seawater DMS concentrations led to r 2 values of 0.61, 0.87, 0.66, and 0.37 for July, August, September, and October, respectively. Measurement data used for model development for July through October were variably distributed spatially. For October only, data were sparse and clustered, resulting in the poor results obtained for this month. Mean sea ice concentration and surface nitrate concentrations were found to be important predictors of surface seawater DMS concentrations. A negative relationship between sea ice concentration and DMS, and a two-phase relationship between nitrate and DMS were found. The two-phase relationship may be indicative of how DMS concentrations are affected when nitrate is the limiting nutrient. From July to September, predicted DMS concentrations were generally lowest under the sea ice. High monthly DMS concentrations (up to 10.7 nM) were predicted in the seasonal ice zone. The highest DMS concentrations in September (∼2.6 nM) were predicted along the ice edge. In order to create more accurate climatologies and to increase our understanding of sulfur cycling in the Arctic, a higher spatial and temporal distribution of DMS measurements is required. |
| doi_str_mv | 10.1007/s10533-011-9683-y |
| format | Article |
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For October only, data were sparse and clustered, resulting in the poor results obtained for this month. Mean sea ice concentration and surface nitrate concentrations were found to be important predictors of surface seawater DMS concentrations. A negative relationship between sea ice concentration and DMS, and a two-phase relationship between nitrate and DMS were found. The two-phase relationship may be indicative of how DMS concentrations are affected when nitrate is the limiting nutrient. From July to September, predicted DMS concentrations were generally lowest under the sea ice. High monthly DMS concentrations (up to 10.7 nM) were predicted in the seasonal ice zone. The highest DMS concentrations in September (∼2.6 nM) were predicted along the ice edge. In order to create more accurate climatologies and to increase our understanding of sulfur cycling in the Arctic, a higher spatial and temporal distribution of DMS measurements is required.</description><identifier>ISSN: 0168-2563</identifier><identifier>EISSN: 1573-515X</identifier><identifier>DOI: 10.1007/s10533-011-9683-y</identifier><identifier>CODEN: BIOGEP</identifier><language>eng</language><publisher>Dordrecht: Springer</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Biogeosciences ; Biological and medical sciences ; Climate models ; Climatology ; Earth and Environmental Science ; Earth Sciences ; Earth, ocean, space ; Ecosystems ; Environmental Chemistry ; Exact sciences and technology ; External geophysics ; Fundamental and applied biological sciences. 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Measurement data used for model development for July through October were variably distributed spatially. For October only, data were sparse and clustered, resulting in the poor results obtained for this month. Mean sea ice concentration and surface nitrate concentrations were found to be important predictors of surface seawater DMS concentrations. A negative relationship between sea ice concentration and DMS, and a two-phase relationship between nitrate and DMS were found. The two-phase relationship may be indicative of how DMS concentrations are affected when nitrate is the limiting nutrient. From July to September, predicted DMS concentrations were generally lowest under the sea ice. High monthly DMS concentrations (up to 10.7 nM) were predicted in the seasonal ice zone. The highest DMS concentrations in September (∼2.6 nM) were predicted along the ice edge. 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W.</au><au>Deal, Clara J.</au><au>Elliott, Scott</au><au>Huettmann, Falk</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spatial predictions of sea surface dimethylsulfide concentrations in the high arctic</atitle><jtitle>Biogeochemistry</jtitle><stitle>Biogeochemistry</stitle><date>2012-09-01</date><risdate>2012</risdate><volume>110</volume><issue>1/3</issue><spage>287</spage><epage>301</epage><pages>287-301</pages><issn>0168-2563</issn><eissn>1573-515X</eissn><coden>BIOGEP</coden><abstract>The climatically-important compound dimethylsulfide (DMS) has been reported to be abundant in the Arctic, particularly in the marginal sea ice zone. Due to these high concentrations, it may play an important role in climate control. A DMS monthly climatology for July through October was created employing various ocean characteristics and spatial modeling techniques commonly used for describing species distributions in ecology. Comparisons between observed and predicted values of surface seawater DMS concentrations led to r 2 values of 0.61, 0.87, 0.66, and 0.37 for July, August, September, and October, respectively. Measurement data used for model development for July through October were variably distributed spatially. For October only, data were sparse and clustered, resulting in the poor results obtained for this month. Mean sea ice concentration and surface nitrate concentrations were found to be important predictors of surface seawater DMS concentrations. A negative relationship between sea ice concentration and DMS, and a two-phase relationship between nitrate and DMS were found. The two-phase relationship may be indicative of how DMS concentrations are affected when nitrate is the limiting nutrient. From July to September, predicted DMS concentrations were generally lowest under the sea ice. High monthly DMS concentrations (up to 10.7 nM) were predicted in the seasonal ice zone. The highest DMS concentrations in September (∼2.6 nM) were predicted along the ice edge. In order to create more accurate climatologies and to increase our understanding of sulfur cycling in the Arctic, a higher spatial and temporal distribution of DMS measurements is required.</abstract><cop>Dordrecht</cop><pub>Springer</pub><doi>10.1007/s10533-011-9683-y</doi><tpages>15</tpages></addata></record> |
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| subjects | Animal and plant ecology Animal, plant and microbial ecology Biogeosciences Biological and medical sciences Climate models Climatology Earth and Environmental Science Earth Sciences Earth, ocean, space Ecosystems Environmental Chemistry Exact sciences and technology External geophysics Fundamental and applied biological sciences. Psychology Geochemistry Geographic information systems Ice Life Sciences Marine Mineralogy Modeling Nitrates Nutrient concentrations Ocean temperature Oceans Physical and chemical properties of sea water Physics of the oceans Salinity Sea ice Sea water Sea water ecosystems Seas Seawater Silicates Spatial models Sulfide compounds Sulfur Synecology Temporal distribution Water geochemistry |
| title | Spatial predictions of sea surface dimethylsulfide concentrations in the high arctic |
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