Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta
Water and sediment supply are essential to the health of deltaic ecosystems. Diverse datasets were integrated to better understand how climate change is shifting the supply of water and sediment to the largest polar distributary channel pattern – the Lena River Delta. Here the increase in warming ra...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
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| Series: | Ecological Indicators |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23013948 |
| _version_ | 1797422665460350976 |
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| author | Sergey Chalov Kristina Prokopeva Dmitry Magritsky Vadim Grigoriev Evgeniya Fingert Michal Habel Bennet Juhls Anne Morgenstern Pier Paul Overduin Nikolay Kasimov |
| author_facet | Sergey Chalov Kristina Prokopeva Dmitry Magritsky Vadim Grigoriev Evgeniya Fingert Michal Habel Bennet Juhls Anne Morgenstern Pier Paul Overduin Nikolay Kasimov |
| author_sort | Sergey Chalov |
| collection | DOAJ |
| description | Water and sediment supply are essential to the health of deltaic ecosystems. Diverse datasets were integrated to better understand how climate change is shifting the supply of water and sediment to the largest polar distributary channel pattern – the Lena River Delta. Here the increase in warming rate from an average air temperature is from 4.1 °C for the period 1950–99 to 6.1 °C during 2000–21, which is higher than in the adjacent polar regions. Streamflow and sediment yield entering the Lena Delta have increased since 1988 by 56.3 km3 and 6.1×106 t, respectively; meanwhile, the Lena River’s increases in water temperature in June, July–August and September were found to be as much as 1.1, 0.6 and 0.05 °C. These changes have a pronounced effect on sediment regimes in particular parts of the delta. Based on analyses of correlations between various hydroclimatic drivers and sediment concentration changes across particular distributaries of the Lena Delta extracted from Landsat datasets, bank degradation driven by thermal erosional processes (which are in turn related to air and soil temperature increases) is proved to be the primary factor of the sediment regime in the delta. The study also highlights that sediment load changes are sensitive to wind speed due to remobilization of bottom sediment. Sums of daily air temperature and wind speed over 3 days are correlated with sediment concentration changes in the delta. The results also indicate that carbon transport across the delta (both POC and DOC) depends on sediment transport conditions and water discharge and might increase by up to 10 %. We conclude that the Lena Delta can be recognized as the global hot spot in terms of the hydrological consequences of climate change, which is altering sediment regimes, stream hydromorphology and carbon transport. |
| first_indexed | 2024-03-09T07:35:43Z |
| format | Article |
| id | doaj.art-d5d73b024cd449bead0e218519d90f6b |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-09T07:35:43Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-d5d73b024cd449bead0e218519d90f6b2023-12-03T05:40:07ZengElsevierEcological Indicators1470-160X2023-12-01157111252Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River deltaSergey Chalov0Kristina Prokopeva1Dmitry Magritsky2Vadim Grigoriev3Evgeniya Fingert4Michal Habel5Bennet Juhls6Anne Morgenstern7Pier Paul Overduin8Nikolay Kasimov9Faculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, Russia; Institute of Ecology and Environment, Kazan Federal University, Kazan 420097, Russia; Faculty of Geographical Sciences, Kazimierz Wielki University, Bydgoszcz 85-064 , Poland; Corresponding author at: Faculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, Russia.Faculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, RussiaFaculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, RussiaFaculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, RussiaFaculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, RussiaFaculty of Geographical Sciences, Kazimierz Wielki University, Bydgoszcz 85-064 , PolandPermafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam 14473, GermanyPermafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam 14473, GermanyPermafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam 14473, GermanyFaculty of Geography, Moscow, Lomonosov Moscow State University, Moscow 119234, RussiaWater and sediment supply are essential to the health of deltaic ecosystems. Diverse datasets were integrated to better understand how climate change is shifting the supply of water and sediment to the largest polar distributary channel pattern – the Lena River Delta. Here the increase in warming rate from an average air temperature is from 4.1 °C for the period 1950–99 to 6.1 °C during 2000–21, which is higher than in the adjacent polar regions. Streamflow and sediment yield entering the Lena Delta have increased since 1988 by 56.3 km3 and 6.1×106 t, respectively; meanwhile, the Lena River’s increases in water temperature in June, July–August and September were found to be as much as 1.1, 0.6 and 0.05 °C. These changes have a pronounced effect on sediment regimes in particular parts of the delta. Based on analyses of correlations between various hydroclimatic drivers and sediment concentration changes across particular distributaries of the Lena Delta extracted from Landsat datasets, bank degradation driven by thermal erosional processes (which are in turn related to air and soil temperature increases) is proved to be the primary factor of the sediment regime in the delta. The study also highlights that sediment load changes are sensitive to wind speed due to remobilization of bottom sediment. Sums of daily air temperature and wind speed over 3 days are correlated with sediment concentration changes in the delta. The results also indicate that carbon transport across the delta (both POC and DOC) depends on sediment transport conditions and water discharge and might increase by up to 10 %. We conclude that the Lena Delta can be recognized as the global hot spot in terms of the hydrological consequences of climate change, which is altering sediment regimes, stream hydromorphology and carbon transport.http://www.sciencedirect.com/science/article/pii/S1470160X23013948Climate changeLong-term changeERA5LandsatLena River DeltaParticulate and dissolved organic carbon |
| spellingShingle | Sergey Chalov Kristina Prokopeva Dmitry Magritsky Vadim Grigoriev Evgeniya Fingert Michal Habel Bennet Juhls Anne Morgenstern Pier Paul Overduin Nikolay Kasimov Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta Ecological Indicators Climate change Long-term change ERA5 Landsat Lena River Delta Particulate and dissolved organic carbon |
| title | Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta |
| title_full | Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta |
| title_fullStr | Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta |
| title_full_unstemmed | Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta |
| title_short | Climate change impacts on streamflow, sediment load and carbon fluxes in the Lena River delta |
| title_sort | climate change impacts on streamflow sediment load and carbon fluxes in the lena river delta |
| topic | Climate change Long-term change ERA5 Landsat Lena River Delta Particulate and dissolved organic carbon |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23013948 |
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