2 research outputs found
MOESM1 of Material flows accounting for Scotland shows the merits of a circular economy and the folly of territorial carbon reporting
Additional file 1. C impact of materials model including the full model, sensitivity analysis and sources used in this study
The African Regional Greenhouse Gases Budget (2010â2019)
As part of the REgional Carbon Cycle Assessment and Processes Phase 2 (RECCAP2) project, we developed a comprehensive African Greenhouse gases (GHG) budget covering 2000 to 2019 (RECCAP1 and RECCAP2 time periods), and assessed uncertainties and trends over time. We compared bottomâup processâbased models, dataâdriven remotely sensed products, and national GHG inventories with topâdown atmospheric inversions, accounting also for lateral fluxes. We incorporated emission estimates derived from novel methodologies for termites, herbivores, and fire, which are particularly important in Africa. We further constrained global woody biomass change products with highâquality regional observations. During the RECCAP2 period, Africa's carbon sink capacity is decreasing, with net ecosystem exchange switching from a small sink of â0.61 ± 0.58 PgC yrâ1 in RECCAP1 to a small source in RECCAP2 at 0.16 (â0.52/1.36) PgC yrâ1. Net CO2 emissions estimated from bottomâup approaches were 1.6 (â0.9/5.8) PgCO2 yrâ1, net CH4 were 77 (56.4/93.9) TgCH4 yrâ1 and net N2O were 2.9 (1.4/4.9) TgN2O yrâ1. Topâdown atmospheric inversions showed similar trends. Land Use Change emissions increased, representing one of the largest contributions at 1.7 (0.8/2.7) PgCO2eq yrâ1 to the African GHG budget and almost similar to emissions from fossil fuels at 1.74 (1.53/1.96) PgCO2eq yrâ1, which also increased from RECCAP1. Additionally, wildfire emissions decreased, while fuelwood burning increased. For most component fluxes, uncertainty is large, highlighting the need for increased efforts to address Africaâspecific data gaps. However, for RECCAP2, we improved our overall understanding of many of the important components of the African GHG budget that will assist to inform climate policy and action.</p