Supplementary material_v1

<strong>Supplementary material</strong> including: <br> <strong>Table S1:</strong> List of resources for assessing the quality of, reporting or creating meta-analyses in several disciplines. <strong>Table S2:</strong> 31 soil organic carbon meta-analyses and their individual scores per (sub)-criterium. <strong>Table S3:</strong> Information on where, when and how literature was collected and treated. <strong>Table S4:</strong> Information on screening process. List of all retrieved articles, screening decisions included. <strong>Table S5:</strong> Results for all meta-analyses per group and (sub)-criterium. Number of meta-analyses and percentages of meta-analyses which fulfilled the criteria; results for number and percentages of meta-analyses that fulfilled cut-off. <strong>Table S6:</strong> Quick quality assessment of meta-analyses in IPCC report with the help of "cut-off" criteria. Quality assessment of meta-analyses in IPCC report. <strong>Table S7:</strong> Results for criteria 9-17 from meta-analyses that passed the three cut-off criteria. Scores and percentage results for criteria 9-17 for only meta-analyses that passed the cut-off criteria. <strong>Table S8:</strong> Template for the quality assessment of meta-analyses. <br> <strong>Corresponding article:</strong> <br> Fohrafellner, J., Zechmeister-Boltenstern, S., Murugan, R., and Valkama, E.: Quality Assessment of Meta-Analyses on Soil Organic Carbon, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2022-488, 2022. <br>