Table 1 Coastal hazard exposure of cultural, natural and total AHS around the entire African coastline

From: African heritage sites threatened as sea-level rise accelerates

  

Baseline

RCP 4.5–2050

RCP 4.5–2100

RCP 8.5–2050

RCP 8.5–2100

Natural

No. of sites

35 (35–35)

151 (151–152)

151 (150–152)

154 (154–160)

154 (152–160)

Area (km2)

1,300 (1,298–1,303)

1,313 (1,308–3,105)

15,053 (11,906–20,545)

1,645 (1,321–3,297)

18,930 (13,652–25,545)

Average exposure (%)

5.1 (5.0–5.1)

5.2 (5.1–5.9)

12.4 (10.4–15.7)

6.1 (5.1–6.5)

15.0 (11.6–20.4)

Cultural

No. of sites

21 (21–21)

40 (40–44)

40 (40–44)

44 (44–50)

44 (40–50)

Area (km2)

419 (417–421)

431 (420–576)

1,585 (1,287–2,051)

527 (436–635)

2,039 (1,516–2,507)

Average exposure (%)

2.7 (2.6–2.8)

2.8 (2.7–3.6)

7.8 (6.5–9.7)

3.3 (2.7–4.0)

9.7 (7.7–12.0)

Total

No. of sites

56 (56–56)

191 (191–196)

191 (190–196)

198 (198–210)

198 (192–210)

Area (km2)

1,719 (1,715–1,721)

1,744 (1,728–3,681)

16,638 (13,192–22,596)

2,171 (1,757–3,932)

20,969 (15,168–28,051)

Average exposure (%)

4.5 (4.4–4.6)

4.6 (4.5–5.4)

11.2 (9.4–14.2)

5.4 (4.5–5.9)

13.7 (10.7–18.3)

  1. Area (in km2) and number of sites exposed to the 100-year coastal extreme event. In addition, the average percentage of the sites’ exposure is shown (exposed area divided by the total site’s area). The values correspond to the baseline (2010), as well as the different emission pathways RCP 4.5 and RCP 8.5, by 2050 and 2100. Values in brackets indicate the very likely range (5th–95th percentiles).
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