Climate zones in Comoros, 1991 to 2020
Share of Comoros's classified land in each Köppen-Geiger zone in 1991 to 2020. Zones under 0.05% are left out. The 1,809 map cells used cover 91% of the country's outline (about 1,520 km²).
By major group: A (tropical) 90%, C (temperate) 10%.
Am, tropical monsoon, is the main climate of Comoros, covering 87% of its classified land in 1991 to 2020, with Cfb (temperate oceanic) next at 9.8%. In plain terms, tropical monsoon means hot all year, with a very wet season and a short dry spell. Under the middle-of-the-road scenario (SSP2-4.5), 6.7% of its land is projected to be in a different zone by 2071 to 2099, with the biggest gain going to Am (tropical monsoon).
How Comoros's zones have changed and may change
Each row compares a map with 1991 to 2020. "Share in a different zone" is the share of the country's area whose class is different from 1991 to 2020. Future rows are model projections under an emissions scenario, not forecasts.
| Map | Share in a different zone | Different major group | Biggest gain | Biggest loss |
|---|---|---|---|---|
| 1901 to 1930 (past) | 12% | 1.2% | Am +9.2 percentage points | Af -8.3 percentage points |
| 2071 to 2099, SSP1-2.6 (low emissions) | 5% | 2.2% | Am +4.5 percentage points | Cfb -2.3 percentage points |
| 2071 to 2099, SSP2-4.5 (middle of the road) | 6.7% | 3.8% | Am +5.5 percentage points | Cfb -4.1 percentage points |
| 2071 to 2099, SSP5-8.5 (high emissions) | 9.6% | 5.6% | Am +6.7 percentage points | Cfb -6.8 percentage points |
For the past row, the comparison runs the other way: the 1901 to 1930 map against 1991 to 2020.
Zone shares by map
| Zone | 1901 to 1930 | 1991 to 2020 | SSP1-2.6 (2071 to 2099) | SSP2-4.5 (2071 to 2099) | SSP5-8.5 (2071 to 2099) |
|---|---|---|---|---|---|
| Am Tropical monsoon | 78% | 87% | 91% | 92% | 94% |
| Cfb Temperate oceanic | 11% | 9.8% | 7.6% | 5.7% | 3% |
| Aw Tropical savannah | 1.8% | 2.1% | 0.7% | 1.2% | 1.8% |
| Af Tropical rainforest | 9.2% | 0.8% | - | - | - |
| Cwb Subtropical highland (dry winter) | 0.3% | 0.3% | 0.4% | 0.7% | 1.5% |
Percentages are of the country's classified land in each map. A dash means under 0.05%.
Zones found in Comoros
Data: Beck et al. (2023), CC BY 4.0; country outlines from Natural Earth. In 1901 to 1930 the most common zone was Am. See data sources and licences.