Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas
Abstract Estimates of nitrate loading to the Arctic Ocean are limited by the lack of field observations within deltas partly due to logistical constraints. To overcome this limitation, we use a remote sensing framework to estimate retention of nitrate in Arctic deltas. We achieve this by coupling hy...
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| Format: | Article |
| Language: | English |
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Wiley
2023-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL102201 |
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| author | Deon Knights Anastasia Piliouras Jon Schwenk Jayaram Hariharan Christopher Russoniello |
| author_facet | Deon Knights Anastasia Piliouras Jon Schwenk Jayaram Hariharan Christopher Russoniello |
| author_sort | Deon Knights |
| collection | DOAJ |
| description | Abstract Estimates of nitrate loading to the Arctic Ocean are limited by the lack of field observations within deltas partly due to logistical constraints. To overcome this limitation, we use a remote sensing framework to estimate retention of nitrate in Arctic deltas. We achieve this by coupling hydrological and biogeochemical process models at the network scale for five major Arctic deltas. Binary masks of delta channels were used to simulate flow direction and magnitude through networks. Models were parameterized using historical and seasonal observations. Simulated nitrate retention ranged from 2.9% to 15% of the incoming load. Retention rates were largest during winter but smallest during spring conditions when increased discharges export large nitrate masses to the coast. Under future climate scenarios, retention rates fall by ∼1%–10%. Arctic deltas have an important effect on the magnitude of nitrate entering Arctic seas and the inclusion of processing in deltas can improve flux estimates. |
| format | Article |
| id | doaj-art-6720480cc6df409db0532ca98cf4a908 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2023-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-6720480cc6df409db0532ca98cf4a9082025-08-20T02:45:43ZengWileyGeophysical Research Letters0094-82761944-80072023-04-01507n/an/a10.1029/2022GL102201Seasonal and Morphological Controls on Nitrate Retention in Arctic DeltasDeon Knights0Anastasia Piliouras1Jon Schwenk2Jayaram Hariharan3Christopher Russoniello4Department of Geology and Geography West Virginia University Morgantown WV USACollege of Earth and Mineral Sciences The Pennsylvania State University University Park PA USAEarth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos NM USADepartment of Civil, Architectural and Environmental Engineering The University of Texas at Austin Austin TX USADepartment of Geology and Geography West Virginia University Morgantown WV USAAbstract Estimates of nitrate loading to the Arctic Ocean are limited by the lack of field observations within deltas partly due to logistical constraints. To overcome this limitation, we use a remote sensing framework to estimate retention of nitrate in Arctic deltas. We achieve this by coupling hydrological and biogeochemical process models at the network scale for five major Arctic deltas. Binary masks of delta channels were used to simulate flow direction and magnitude through networks. Models were parameterized using historical and seasonal observations. Simulated nitrate retention ranged from 2.9% to 15% of the incoming load. Retention rates were largest during winter but smallest during spring conditions when increased discharges export large nitrate masses to the coast. Under future climate scenarios, retention rates fall by ∼1%–10%. Arctic deltas have an important effect on the magnitude of nitrate entering Arctic seas and the inclusion of processing in deltas can improve flux estimates.https://doi.org/10.1029/2022GL102201Arctic deltasRivGraphnitratenutrient spiralingnitrate retention |
| spellingShingle | Deon Knights Anastasia Piliouras Jon Schwenk Jayaram Hariharan Christopher Russoniello Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas Geophysical Research Letters Arctic deltas RivGraph nitrate nutrient spiraling nitrate retention |
| title | Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas |
| title_full | Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas |
| title_fullStr | Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas |
| title_full_unstemmed | Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas |
| title_short | Seasonal and Morphological Controls on Nitrate Retention in Arctic Deltas |
| title_sort | seasonal and morphological controls on nitrate retention in arctic deltas |
| topic | Arctic deltas RivGraph nitrate nutrient spiraling nitrate retention |
| url | https://doi.org/10.1029/2022GL102201 |
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