Matches in SemOpenAlex for { <https://semopenalex.org/work/W4322005373> ?p ?o ?g. }
Showing items 1 to 54 of
54
with 100 items per page.
- W4322005373 abstract "Subduction regions play an important role in transferring carbon from the surface to the deep ocean and sequestering it on a multi-decadal to centennial timescale. Hence, we test the hypothesis that a Carbon Dioxide Removal (CDR) method, namely Ocean Alkalinity Enhancement (OAE) based on olivine addition, is more efficient in deep and bottom water formation region in terms of enhancing the ocean CO2 uptake.Using an ocean-only setup of the physical-biogeochemical model FESOM2.1-REcoM3, we quantify the responses to the spatially uniform and continuous addition of olivine (alkalinity, silicic acid and iron) over the period of 2030-2100 under the SSP1-2.6 and SSP3-7.0 emission scenarios in a global (3 Pg olivine/yr) and a regional application (0.22 Pg olivine/yr). For the regional case, we deposit olivine in the major deep and bottom water formation areas of the Southern Ocean, in the Labrador Sea and the Norwegian Sea.Under the SSP1-2.6 (SSP3-7.0) scenarios, CO2 uptake increases by 1.2 (1.3) Pg C/yr by the end of the 21st century in the global case, whereas it increases by 0.2 (0.2) Pg C/yr in the regional case. The area of uniform olivine deposition is significantly smaller in the regional case compared to the global case, yet the regional OAE has a 2.3-fold higher CDR potential compared to the global OAE in both emission scenarios. The high CDR potential in the regional case is largely (80%) attributed to enhanced biological activity resulting from nutrient fertilization in the Southern Ocean, while only 20% is due to enhanced alkalinity. However, the nutrient effect decreases over time. Furthermore, nutrient addition promotes small-phytoplankton calcification in global and regional OAE cases, leading to lower surface alkalinity by the end of the century. Interestingly, CDR potential of adding alkalinity only (without nutrients) is also 4% and 6.6% higher in the subduction regions than in global OAE under the SSP1-2.6 and SSP3-7.0 scenarios. Overall, the subduction regions, hence show higher CDR efficiency in both cases (alkalinity+nutrients, only alkalinity addition). This effect is two orders of magnitude larger when nutrients are included as this essentially includes Southern Ocean iron fertilization." @default.
- W4322005373 created "2023-02-26" @default.
- W4322005373 creator A5008576052 @default.
- W4322005373 creator A5068651569 @default.
- W4322005373 creator A5072401090 @default.
- W4322005373 date "2023-05-15" @default.
- W4322005373 modified "2023-09-29" @default.
- W4322005373 title "Effects of Ocean Alkalinity Enhancement in deep and bottom water formation regions on the 21st century CO2 uptake under low and high emission pathways." @default.
- W4322005373 doi "https://doi.org/10.5194/egusphere-egu23-7154" @default.
- W4322005373 hasPublicationYear "2023" @default.
- W4322005373 type Work @default.
- W4322005373 citedByCount "0" @default.
- W4322005373 crossrefType "posted-content" @default.
- W4322005373 hasAuthorship W4322005373A5008576052 @default.
- W4322005373 hasAuthorship W4322005373A5068651569 @default.
- W4322005373 hasAuthorship W4322005373A5072401090 @default.
- W4322005373 hasConcept C107872376 @default.
- W4322005373 hasConcept C111368507 @default.
- W4322005373 hasConcept C127313418 @default.
- W4322005373 hasConcept C17409809 @default.
- W4322005373 hasConcept C178790620 @default.
- W4322005373 hasConcept C185592680 @default.
- W4322005373 hasConcept C21790881 @default.
- W4322005373 hasConcept C2780364934 @default.
- W4322005373 hasConcept C39432304 @default.
- W4322005373 hasConcept C45812177 @default.
- W4322005373 hasConcept C71915725 @default.
- W4322005373 hasConceptScore W4322005373C107872376 @default.
- W4322005373 hasConceptScore W4322005373C111368507 @default.
- W4322005373 hasConceptScore W4322005373C127313418 @default.
- W4322005373 hasConceptScore W4322005373C17409809 @default.
- W4322005373 hasConceptScore W4322005373C178790620 @default.
- W4322005373 hasConceptScore W4322005373C185592680 @default.
- W4322005373 hasConceptScore W4322005373C21790881 @default.
- W4322005373 hasConceptScore W4322005373C2780364934 @default.
- W4322005373 hasConceptScore W4322005373C39432304 @default.
- W4322005373 hasConceptScore W4322005373C45812177 @default.
- W4322005373 hasConceptScore W4322005373C71915725 @default.
- W4322005373 hasLocation W43220053731 @default.
- W4322005373 hasOpenAccess W4322005373 @default.
- W4322005373 hasPrimaryLocation W43220053731 @default.
- W4322005373 hasRelatedWork W2036768151 @default.
- W4322005373 hasRelatedWork W2775627733 @default.
- W4322005373 hasRelatedWork W2909256575 @default.
- W4322005373 hasRelatedWork W2996479360 @default.
- W4322005373 hasRelatedWork W3018401861 @default.
- W4322005373 hasRelatedWork W4200020759 @default.
- W4322005373 hasRelatedWork W4220777869 @default.
- W4322005373 hasRelatedWork W4230355333 @default.
- W4322005373 hasRelatedWork W4240898397 @default.
- W4322005373 hasRelatedWork W2911215796 @default.
- W4322005373 isParatext "false" @default.
- W4322005373 isRetracted "false" @default.
- W4322005373 workType "article" @default.