CMIP6 models agree on similar carbon cycle feedbacks between enhancing terrestrial and marine carbon sinks
Bibliographic Data
| ID | 15549797 |
|---|---|
| Authors | Hao‐Wei Wey (0000-0002-5808-9218, GEOMAR Helmholtz Centre for Ocean Research Kiel, corresponding author), Yiannis Moustakis (0000-0002-4448-2967, Ludwig-Maximilians-Universität München), Tobias Nützel (0000-0002-3603-4283, Ludwig-Maximilians-Universität München), Andreas Oschlies (0000-0002-8295-4013, Christian-Albrechts-Universität zu Kiel), Jörg Schwinger (0000-0002-7525-6882, Bjerknes Centre for Climate Research), Tomohiro Hajima (0000-0002-4828-5100), R A Fisher (0000-0003-3260-9227, CICERO Center for International Climate Research), Tilo Ziehn (0000-0001-9873-9775, CSIRO Oceans and Atmosphere), Spencer Liddicoat (0000-0002-5145-7153, Met Office), Spencer K Liddicoat, Tronje P Kemena (0000-0003-2894-8314, GEOMAR Helmholtz Centre for Ocean Research Kiel), David P Keller (0000-0002-7546-4614, American Legacy Foundation) |
| Year | 2025 |
| Volume | 20 |
| Issue | 5 |
| Pages | 054029-054029 |
| Publication date | 2025-03-27 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/adc617 |
| OpenAlex | W4408894199 |
| Language | EN |
| Citations received | 3 |
| References cited | 56 |
Carbon dioxide removal (CDR) is a crucial component of climate mitigation required to reach international climate targets. However, gaps exist in our understanding of the responses and feedbacks of the Earth system to the deployment of CDR. In this study, we compare two complementary approaches that enhance the terrestrial and marine carbon sinks with afforestation and reforestation (A/R) and ocean alkalinity enhancement (OAE), respectively, under the high emission scenario SSP5-8.5. Eight CMIP6 Earth system models are utilized, enabling a quantification of both inter-model and internal variability. By mid-century, simulated large-scale deployment of A/R and OAE individually reduces atmospheric CO 2 concentrations by up to 20 ppm. For both methods, while carbon removal from the atmosphere is robust, it is difficult to detect the effects on global mean temperature, posing challenges for monitoring, reporting and verification of mitigation efforts. To quantify the carbon cycle feedbacks, we define the carbon cycle feedback ratio of A/R (OAE) as the ratio of changes in the marine (terrestrial) sink to changes in the terrestrial (marine) sink. We show that the carbon cycle feedback ratios of A/R and OAE have similar magnitudes, which are −16% and −13%, respectively. Moreover, although inter-model differences of the simulated amounts of carbon removal due to A/R are large, the corresponding carbon cycle feedback ratios of A/R are similar
Atmospheric sciences · Biology · Carbon cycle · Carbon fibers · Carbon flux · Carbon sink · Climate change · Ecosystem · Atmospheric and Environmental Gas Dynamics · Computer Science · Environmental Science · Ecology · Geology
Harmonization of global land use change and management for the period 850–2100 (LUH2) for CMIP6
Global emissions pathways under different socioeconomic scenarios for use in CMIP6
Climate–Carbon Cycle Feedback Analysis
Uncertainty in climate change projections
The Community Earth System Model Version 2 (Cesm2)
Uncertainty in carbon budget estimates due to internal climate variability
The signature of internal variability in the terrestrial carbon cycle
On the emission-path dependency of the efficiency of ocean alkalinity enhancement
Exploring SSP land-use dynamics using the Image model
Fossil-fueled development (SSP5)
| Unique citing works | 3 |
|---|---|
| Citations per year | 3 |
| Citation span | 2025 - 2025 (1) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 3 |