Table 2.
Climate impact variables of all solutions obtained from meta-analysis with the number of data points and sources used listed
| Solution name | Carbon removal (t ha−1 yr−1) | Carbon avoided emissions (t ha−1 yr−1) | Carbon storage in protected ocean area (tC ha−1) | Number of data points | Number of sources |
|---|---|---|---|---|---|
| Coastal wetlands protection | Mangroves 1.91 ± 0.55 | Mangroves 32.75 ± 27.35 | Mangroves 585.77 ± 375.51 | 9, 19*, 9† | 7, 11*, 4† |
| Seagrasses 1.19 ± 0.5 | Seagrasses 3.81 ± 2.31 | Seagrasses 234.60 ± 94.90 | 2, 9*, 2† | 1, 6*, 1† | |
| Salt marshes 1.92 ± 0.97 | Salt marshes 14.28 ± 15.60 | Salt marshes 355.07 ± 301.11 | 27, 8*, 4† | 11, 5*, 4† | |
| Coastal wetlands restoration | Mangroves 6.58 ± 2.58 | — | — | 17 | 12 |
| Seagrasses 1.00 ± 1.32 | — | — | 12 | 4 | |
| Salt marshes 0.93 ± 0.50 | — | — | 9 | 6 | |
| Macroalgae protection | 0.97 ± 0.68 | — | — | 14 | 6‡ |
| Macroalgae restoration | 0.97 ± 0.68 | — | — | 14 | 6‡ |
| Seafloor protection | — | 13.83 ± 6.36 | 14,745.67 ± 6,597.6 | 111 | 55‡ |
| Seaweed farming | 3.21 ± 2.1 | — | — | 44 | 16‡ |
The values are mean with a range defined as one SD above and below the mean of entered values. Carbon removal and carbon avoided emissions are annual estimates. For a detailed description behind each variable, see SI Appendix, S5.
*Values represent the number of data points and references used in estimating emissions reduction for coastal wetlands protection.
†Values represent the number of data points and references used in estimating carbon storage in protected ocean area for coastal wetlands protection.
‡Climate impact variables are results of Project Drawdown’s calculations specified in SI Appendix, S1 and not raw data points taken from the published sources.