Chlorophyll-a deviation from the global average in Saint Helena
Saint Helena: Chlorophyll-a deviation from the global average was 0.2% in 2022. ◆ Volatile
Chlorophyll-a deviation from the global average in Saint Helena, 2005–2022
Source: UN Statistics Division – processed by Our World in Data. Measured in %.
Analysis
In 2022, chlorophyll-a deviation from the global average in Saint Helena stood at 0.2%. That is the lowest value across all 18 years on record.
Compared with earlier readings it is down 91.1% on the previous year and down 86.1% over ten years.
Over the whole period, chlorophyll-a deviation from the global average in Saint Helena peaked at 4.2% in 2009 and was at its lowest, 0.2%, in 2022.
That places Saint Helena 139th out of 193 countries with data for 2022, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 2.7% | 1.7% | 4.2% | 5 |
| 2010s | 1.7% | 0.5% | 3.5% | 10 |
| 2020s | 1.7% | 0.2% | 2.8% | 3 |
Countries ranked near Saint Helena
- 137 Azerbaijan 0.3% compare
- 138 Cuba 0.3% compare
- 140 Saint Kitts and Nevis 0.2% compare
- 141 Tanzania 0.2% compare
- 142 New Caledonia 0.2% compare
More reference data data for Saint Helena
- Temperature anomalies by month 0.8 °C (2026)
- Summer temperature anomalies -0.0099 °C (2026)
- Spring temperature anomalies 0.7284 °C (2026)
- Autumn temperature anomalies 0.2222 °C (2025)
- Winter temperature anomalies 0.2374 °C (2025)
- Foreign aid received as grants and concessional loans 53.68 million constant 2024 US$ (2024)
- Foreign aid received 53.68 million constant 2024 US$ (2024)
- Foreign aid received from governments and private foundations 53.68 million constant 2024 US$ (2024)
- Foreign aid received by income group 53.68 million constant 2024 US$ (2024)
- Foreign aid received per capita 10,202 constant 2024 US$ (2024)
Frequently asked questions
- What is chlorophyll-a deviation from the global average in Saint Helena?
- Chlorophyll-a deviation from the global average in Saint Helena was 0.2% in 2022, according to UN Statistics Division – processed by Our World in Data.
- What is the highest chlorophyll-a deviation from the global average recorded in Saint Helena?
- The highest recorded value was 4.2% in 2009.
- What is the lowest chlorophyll-a deviation from the global average recorded in Saint Helena?
- The lowest recorded value was 0.2% in 2022.
- How does Saint Helena rank for chlorophyll-a deviation from the global average?
- Saint Helena ranks 139th out of 193 countries with data for 2022.
- Is chlorophyll-a deviation from the global average rising or falling in Saint Helena?
- Over the last ten years it is down 86.1%. The long-run trend across the full record is volatile.
- Where does this Saint Helena data come from?
- The figures come from UN Statistics Division – processed by Our World in Data, published as part of Chlorophyll-a deviation from the global average. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 18 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Chlorophyll-a deviations, remote sensing (%)