Representing the present and future release of carbon to rivers in permafrost regions using an earth system model
For much of the Pleistocene, regions of the Earth underlain by permafrost have been net accumulators of terrestrially-fixed plant carbon (C), known as organic C, to the extent that in the present day the soils of the northern circumpolar permafrost region alone contain a C mass outweighing that whic...
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ftinsu:oai:HAL:tel-02297093v2 2024-04-28T08:09:31+00:00 Representing the present and future release of carbon to rivers in permafrost regions using an earth system model Représenter le rejet présent et futur de carbone dans les rivières dans les régions de pergélisol à l'aide d'un modèle de surface Bowring, Simon Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Université Paris Saclay (COmUE) Philippe Ciais Bertrand Guenet Ronny Lauerwald 2019-05-23 https://theses.hal.science/tel-02297093 https://theses.hal.science/tel-02297093v2/document https://theses.hal.science/tel-02297093v2/file/75066_BOWRING_2019_archivage.pdf en eng HAL CCSD NNT: 2019SACLV034 tel-02297093 https://theses.hal.science/tel-02297093 https://theses.hal.science/tel-02297093v2/document https://theses.hal.science/tel-02297093v2/file/75066_BOWRING_2019_archivage.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-02297093 Climatology. Université Paris Saclay (COmUE), 2019. English. ⟨NNT : 2019SACLV034⟩ Permafrost Rivers Doc Alkalinity Climate change Active layer Pergélisol Rivières Carbone organique dissout (COD) Alcalinité Changement climatique Couche active [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/doctoralThesis Theses 2019 ftinsu 2024-04-05T00:43:36Z For much of the Pleistocene, regions of the Earth underlain by permafrost have been net accumulators of terrestrially-fixed plant carbon (C), known as organic C, to the extent that in the present day the soils of the northern circumpolar permafrost region alone contain a C mass outweighing that which exists in the modern atmosphere by a factor of over two. At the same time, the rivers of the Arctic permafrost region discharge about 11% of the global volumetric river water flux into oceans, doing so into an ocean (the Arctic) with 1% of global ocean water volume and a very high surface area: volume ratio, making it comparatively sensitive to influxes of terrestrially derived matter. This river flux is sourced from precipitation as either rain or snow, which, upon initial contact with the landscape has the immediate potential to interact with C in one of two ways: Water running over carbonate or silicate –bearing rocks will cause a reaction whose reactant requires the uptake of atmospheric CO2, which is subsequently transported in river water. This ‘inorganic’ C derived from interaction of water, atmosphere and lithosphere thus represents a C storage or ‘sink’ vector. In addition, water interacting with organic matter in tree canopies, litter or soil can dissolve C contained therein, and transfer it via surface and subsurface water flows into rivers, whereupon it may either be metabolised to the atmosphere or exported to the sea. Recent improvements in understanding of terrestrial C dynamics indicate that this hydrologic transfer of organic matter represents the dominant fate of organic carbon, after plant and soil respiration are accounted for. In the context of amplified Arctic anthropogenic warming, the thermal exposure imposed on the permafrost C stock with expectations of enhanced future precipitation point toward substantial shifts in the lateral flux-mediated organic and inorganic C cycle. However, the complex totality of the processes involved make prediction of this shift difficult. Addressing this gap in ... Doctoral or Postdoctoral Thesis Arctic Climate change permafrost pergélisol Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Permafrost Rivers Doc Alkalinity Climate change Active layer Pergélisol Rivières Carbone organique dissout (COD) Alcalinité Changement climatique Couche active [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Permafrost Rivers Doc Alkalinity Climate change Active layer Pergélisol Rivières Carbone organique dissout (COD) Alcalinité Changement climatique Couche active [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes Bowring, Simon Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
topic_facet |
Permafrost Rivers Doc Alkalinity Climate change Active layer Pergélisol Rivières Carbone organique dissout (COD) Alcalinité Changement climatique Couche active [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
description |
For much of the Pleistocene, regions of the Earth underlain by permafrost have been net accumulators of terrestrially-fixed plant carbon (C), known as organic C, to the extent that in the present day the soils of the northern circumpolar permafrost region alone contain a C mass outweighing that which exists in the modern atmosphere by a factor of over two. At the same time, the rivers of the Arctic permafrost region discharge about 11% of the global volumetric river water flux into oceans, doing so into an ocean (the Arctic) with 1% of global ocean water volume and a very high surface area: volume ratio, making it comparatively sensitive to influxes of terrestrially derived matter. This river flux is sourced from precipitation as either rain or snow, which, upon initial contact with the landscape has the immediate potential to interact with C in one of two ways: Water running over carbonate or silicate –bearing rocks will cause a reaction whose reactant requires the uptake of atmospheric CO2, which is subsequently transported in river water. This ‘inorganic’ C derived from interaction of water, atmosphere and lithosphere thus represents a C storage or ‘sink’ vector. In addition, water interacting with organic matter in tree canopies, litter or soil can dissolve C contained therein, and transfer it via surface and subsurface water flows into rivers, whereupon it may either be metabolised to the atmosphere or exported to the sea. Recent improvements in understanding of terrestrial C dynamics indicate that this hydrologic transfer of organic matter represents the dominant fate of organic carbon, after plant and soil respiration are accounted for. In the context of amplified Arctic anthropogenic warming, the thermal exposure imposed on the permafrost C stock with expectations of enhanced future precipitation point toward substantial shifts in the lateral flux-mediated organic and inorganic C cycle. However, the complex totality of the processes involved make prediction of this shift difficult. Addressing this gap in ... |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Université Paris Saclay (COmUE) Philippe Ciais Bertrand Guenet Ronny Lauerwald |
format |
Doctoral or Postdoctoral Thesis |
author |
Bowring, Simon |
author_facet |
Bowring, Simon |
author_sort |
Bowring, Simon |
title |
Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
title_short |
Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
title_full |
Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
title_fullStr |
Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
title_full_unstemmed |
Representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
title_sort |
representing the present and future release of carbon to rivers in permafrost regions using an earth system model |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://theses.hal.science/tel-02297093 https://theses.hal.science/tel-02297093v2/document https://theses.hal.science/tel-02297093v2/file/75066_BOWRING_2019_archivage.pdf |
genre |
Arctic Climate change permafrost pergélisol |
genre_facet |
Arctic Climate change permafrost pergélisol |
op_source |
https://theses.hal.science/tel-02297093 Climatology. Université Paris Saclay (COmUE), 2019. English. ⟨NNT : 2019SACLV034⟩ |
op_relation |
NNT: 2019SACLV034 tel-02297093 https://theses.hal.science/tel-02297093 https://theses.hal.science/tel-02297093v2/document https://theses.hal.science/tel-02297093v2/file/75066_BOWRING_2019_archivage.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797577849404653568 |