DoloSil20-SAI-Trilemma

🌍 DoloSil-20 · SAI Trilemma Screening — Figure & Data Repository

📘 Project Title

Resolving the SAI Trilemma with a Novel Core–Shell Mineral Aerosol: DoloSil-20, a Silica-Passivated Dolomite Architecture for Simultaneous Optical Efficiency, Thermal Neutrality, and Ozone Safety

👤 Authors: Abdul Haseeb Tanoli · Shams ul Arfeen
🏛️ Affiliation: Department of Metallurgy and Materials Engineering, PIEAS, Nilore, Islamabad 45650, Pakistan
📄 Preprint Server: EarthArXiv (priority timestamping prior to journal submission)
🎯 Target Journal: Atmospheric Chemistry and Physics (ACP) — EGU/Copernicus
🔗 Repository URL: https://abdulhaseebtanoli.github.io/DoloSil20-SAI-Trilemma/

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📖 Overview

This repository contains the principal figures and supplementary visual datasets associated with the DoloSil-20 study on Stratospheric Aerosol Injection (SAI) and the atmospheric engineering “SAI trilemma”:

• High optical efficiency
• Thermal neutrality
• Ozone safety

The repository is structured to support manuscript preparation, peer review, archival transparency, and scientific reproducibility of figure assets.

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📂 Repository Structure

DoloSil20-SAI-Trilemma/

├── README.md ← Repository overview

├── ── MAIN PAPER FIGURES ──
├── FULL_OVERVIEW_highres.pdf ← Visual Summary
├── beta_back_comparison.pdf ← Figure 1
├── aden_kerker_mechanism.pdf ← Figure 2
├── screening_summary_3panel.pdf ← Figure 3

├── ── SUPPLEMENTARY (standalone PDFs) ──
├── optics_g_vs_diameter.pdf ← S1
├── optics_Qsca_vs_diameter.pdf ← S2
├── talc_settling_vt_mm_day_cases.pdf ← S3
├── residence_time_comparison.pdf ← S4

└── All_Figures.pdf ← S5–S27 + duplicated main figures
(30 pages, indexed)

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🧪 Main-Text Figures

These figures appear directly in the manuscript body and form the core scientific narrative of the study.

File	Figure No.	Description
FULL_OVERVIEW_highres.pdf	Visual Summary	12-panel graphical overview covering background, material design, model framework, key outputs, and trilemma assessment
beta_back_comparison.pdf	Figure 1	Mass-specific backscatter proxy β_back vs. outer diameter at λ = 550 nm for DoloSil-20, H₂SO₄, and Talc (AR = 10)
aden_kerker_mechanism.pdf	Figure 2	Aden–Kerker two-interface electromagnetic enhancement mechanism with far-field polar scattering representation
screening_summary_3panel.pdf	Figure 3	Three-panel trilemma screening: Relative Optical Efficiency, Annual Mass Replacement Rate, and Ozone Safety Index (OSI)
All_Figures.pdf — page 30	Figure 4	Size-resolved contribution to total AOD at the final checkpoint (day 1825)
All_Figures.pdf — page 9	Figure 5	Partial-column ozone evolution in the 10–40 km surrogate domain over 0–1825 days
All_Figures.pdf — page 23	Figure 6	Temperature anomaly ΔT(z,t) altitude–time heatmaps for all candidate materials
All_Figures.pdf — page 24	Figure 7	Peak heating amplitude max_z ΔT tracked over 1825 days
All_Figures.pdf — page 2	Figure 8	Column mass loading decay over 1825 days

Note: Figures 4–8 are extracted from All_Figures.pdf for manuscript typesetting. The same visual content also appears in the supplementary compilation.

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📑 Supplementary Figures S1–S4 (Standalone PDFs)

File	Figure	Description
optics_g_vs_diameter.pdf	S1	Asymmetry parameter g vs. diameter at λ = 550 nm for seven mineral candidates
optics_Qsca_vs_diameter.pdf	S2	Scattering efficiency Q_sca vs. diameter at λ = 550 nm for seven mineral candidates
talc_settling_vt_mm_day_cases.pdf	S3	Talc settling velocity sensitivity under aspect-ratio cases AR = 5 and AR = 10
residence_time_comparison.pdf	S4	Settling-only residence time proxy over 10 km at 20 km altitude for Talc (AR = 10) and H₂SO₄

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📚 Supplementary Figures in All_Figures.pdf

📌 All_Figures.pdf is a 30-page supplementary compilation.
📌 Page 1 contains the complete figure index.
⚠️ Figures marked “Main Paper” are duplicated for completeness.

PDF Page	Figure	Description	Main Paper
2	S-Fig1 / Fig 8	Column mass loading decay — Sulfate, Calcite, DoloSil-20	✅
3	S5	Ozone recovery proxy — heterogeneous H₂SO₄ neutralization flux	❌
4	S6	Radiative forcing proxy (AOD × −25 W m⁻²)	❌
5	S7	Mass concentration M(z,t) altitude–time heatmaps	❌
6	S8	Surface area density (SAD) evolution	❌
7	S9	Effective radius R_eff growth	❌
8	S10	Cooling efficiency RF/M (W kg⁻¹)	❌
9	S-Fig8 / Fig 5	Ozone column evolution (DU) — explicit O₃	✅
10	S10b	Ozone column vs. neutralization flux scatter	❌
11	S11	Mass loss rate −dM/dt	❌
12	S12	Cumulative mass loss relative to day 0	❌
13	S13	Buffering efficiency Φ/A	❌
14	S14	UV/Visible extinction ratio for DoloSil-20	❌
15	S15	Residence time by altitude bands	❌
16	S16	Peak mass concentration altitude vs. time	❌
17	S17a	3D size distribution surface — Sulfate	❌
18	S17b	3D size distribution surface — Calcite	❌
19	S17c	3D size distribution surface — DoloSil-20	❌
20	S18	Mass-specific aerosol optical depth AOD/M	❌
21	S19	Column particle number loading	❌
22	S20	Ozone evolution O₃(z,t) heatmaps	❌
23	S21 / Fig 6	Temperature anomaly ΔT(z,t) heatmaps	✅
24	S22 / Fig 7	Peak heating amplitude max_z ΔT	✅
25	S23	Altitude of peak ΔT heating	❌
26	S24	Spectral AOD time series	❌
27	S25	Ångström exponent proxy	❌
28	S26	Mass-weighted centroid altitude	❌
29	S27	Extinction-weighted centroid altitude	❌
30	S-Fig26 / Fig 4	Size-resolved contribution to AOD	✅

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📌 Citation

@article{tanoli2025dolosil20, author = {Tanoli, Abdul Haseeb and Arfeen, Shams ul}, title = {Resolving the SAI Trilemma with a Novel Core–Shell Mineral Aerosol: DoloSil-20, a Silica-Passivated Dolomite Architecture for Simultaneous Optical Efficiency, Thermal Neutrality, and Ozone Safety}, journal = {EarthArXiv Preprint}, year = {2026}, note = {Submitted to Atmospheric Chemistry and Physics (ACP)}, url = {https://abdulhaseebtanoli.github.io/DoloSil20-SAI-Trilemma/} }

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🔬 Data and Code Availability

The complete Python simulation framework — including the 1D sectional aerosol model, Aden–Kerker optical solver, heterogeneous chemistry routines, and figure-generation scripts — is not publicly released at this stage.

Requests for verification, replication, or collaboration may be directed to:

📧 Abdul Haseeb Tanoli — bsmme2511@pieas.edu.pk
🏛️ PIEAS SAI Research Initiative
Department of Metallurgy and Materials Engineering, PIEAS

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⚖️ License

© 2025 Abdul Haseeb Tanoli & Shams ul Arfeen. All rights reserved.

This repository is shared for scientific transparency in support of the EarthArXiv preprint.

Reproduction, redistribution, or reuse of repository material requires written permission from the corresponding author.

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