Blue Carbon Financing of Mangrove Conservation in the Abidjan Convention Region: A Feasibility Study

Guinea-Bissau

280,600

Mangrove area – year 0

316.30

C density top m of soil (Mg/ha)

97.10

C density of above + below ground biomass (Mg/ha)

$226

Above ground land value (US$/ha)

Years (end of)

Present value

1

2

3

20

278,636

276,672

274,735

243,810

Area of Blue Carbon (ha)

1,964

1,937

1,923

1,707

Area lost (ha) @0.7%/yr

621,276

612,579

608,291

539,819

Soil carbon exposed (Mg)

31,064

61,693

92,107

577,765

Soil carbon cumulative loss (Mg)

190,724

188,054

186,737

165,717

Biomass carbon lost (Mg)

221,788

249,746

278,845

743,483

Total C emitted (Mg)

225,500

253,407

282,479

746,708

Carbon benefit of conservation (Mg)

$61,334,514

$676,500

$760,220

$847,438

$2,240,124

C value at US$ 3/tCO 2 e, 5%

$102,224,190

$1,127,500

$1,267,034

$1,412,397

$3,733,541

C value at US$ 5/tCO 2 e, 5%

$45,734,846

$676,500

$760,220

$847,438

$2,240,124

C value at US$ 3/tCO 2 e, 8%

$76,224,744

$1,127,500

$1,267,034

$1,412,397

$3,733,541

C value at US$ 5/tCO 2 e, 8%

$783,740

$51,069

$52,318

$53,903

$79,199

Cost to conserve ($25/ha estab., US$ 1/yr), 5%

$6,798,561

$469,444

$476,621

$486,938

$651,676

Cost to conserve ($232/ha estab., US$ 7/yr), 5%

$604,703

$51,069

$52,318

$53,903

$79,199

Cost to conserve ($25/ha estab., US$ 1/yr), 8%

$5,273,246

$469,444

$476,621

$486,938

$651,676

Cost to conserve ($232/ha estab., US$ 7/yr), 8%

$47,038,144

$443,909

$881,604

$1,316,234

$8,256,396

Opportunity cost, 5%

$33,542,507

$443,909

$881,604

$1,316,234

$8,256,396

Opportunity cost, 8%

High carbon price

Low carbon price

Net Benefit of Conservation (million US$)

8%

8%

5%

5%

$42.1

$11.6

$54.4

$13.5

Low cost of conservation

$37.4

$6.9

$48.4

$7.5

High cost of conservation

50