تقرير
Initial validation of a soil-based mass-balance approach for empirical monitoring of enhanced rock weathering rates
| العنوان: | Initial validation of a soil-based mass-balance approach for empirical monitoring of enhanced rock weathering rates |
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| المؤلفون: | Reershemius, Tom, Kelland, Mike E., Jordan, Jacob S., Davis, Isabelle R., D'Ascanio, Rocco, Kalderon-Asael, Boriana, Asael, Dan, Suhrhoff, T. Jesper, Epihov, Dimitar Z., Beerling, David J., Reinhard, Christopher T., Planavsky, Noah J. |
| سنة النشر: | 2023 |
| المجموعة: | Quantitative Biology |
| مصطلحات موضوعية: | Quantitative Biology - Other Quantitative Biology |
| الوصف: | Enhanced Rock Weathering (ERW) is a promising scalable and cost-effective Carbon Dioxide Removal (CDR) strategy with significant environmental and agronomic co-benefits. A major barrier to large-scale implementation of ERW is a robust Monitoring, Reporting, and Verification (MRV) framework. To successfully quantify the amount of carbon dioxide removed by ERW, MRV must be accurate, precise, and cost-effective. Here, we outline a mass-balance-based method where analysis of the chemical composition of soil samples is used to track in-situ silicate rock weathering. We show that signal-to-noise issues of in-situ soil analysis can be mitigated by using isotope-dilution mass spectrometry to reduce analytical error. We implement a proof-of-concept experiment demonstrating the method in controlled mesocosms. In our experiment, basalt rock feedstock is added to soil columns containing the cereal crop Sorghum bicolor at a rate equivalent to 50 t ha$^{-1}$. Using our approach, we calculate rock weathering corresponding to an average initial CDR value of 1.44 +/- 0.27 tCO$_2$eq ha$^{-1}$ from our experiments after 235 days, within error of an independent estimate calculated using conventional elemental budgeting of reaction products. Our method provides a robust time-integrated estimate of initial CDR, to feed into models that track and validate large-scale carbon removal through ERW. Comment: Environmental Science & Technology (2023) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1021/acs.est.3c03609 |
| URL الوصول: | http://arxiv.org/abs/2302.05004 |
| رقم الأكسشن: | edsarx.2302.05004 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1021/acs.est.3c03609 |
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