Chlorophyll-a deviation from the global average in Heard Island and McDonald Islands
Heard Island and McDonald Islands: Chlorophyll-a deviation from the global average was 3.3% in 2022. ◆ Volatile
Chlorophyll-a deviation from the global average in Heard Island and McDonald Islands, 2005–2022
Source: UN Statistics Division – processed by Our World in Data. Measured in %.
Analysis
The most recent figure for chlorophyll-a deviation from the global average in Heard Island and McDonald Islands is 3.3%, measured in 2022.
The figure is down 72.8% on the previous year and down 3.3% over ten years.
Over the whole period, chlorophyll-a deviation from the global average in Heard Island and McDonald Islands peaked at 12.0% in 2021 and was at its lowest, 1.5%, in 2005.
That places Heard Island and McDonald Islands 61st out of 195 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.
Chlorophyll-a deviation from the global average in Heard Island and McDonald Islands, year by year
| Year | % | Change |
|---|---|---|
| 2005 | 1.5% | — |
| 2006 | 2.8% | +81.7% |
| 2007 | 3.0% | +6.1% |
| 2008 | 1.9% | -36.9% |
| 2009 | 5.3% | +182.8% |
| 2010 | 4.7% | -9.9% |
| 2011 | 5.5% | +16.0% |
| 2012 | 3.4% | -38.5% |
| 2013 | 2.6% | -22.8% |
| 2014 | 1.8% | -31.4% |
| 2015 | 2.4% | +31.3% |
| 2016 | 1.9% | -18.7% |
| 2017 | 3.9% | +104.2% |
| 2018 | 2.9% | -26.7% |
| 2019 | 2.2% | -21.7% |
| 2020 | 4.6% | +105.4% |
| 2021 | 12.0% | +161.3% |
| 2022 | 3.3% | -72.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 2.9% | 1.5% | 5.3% | 5 |
| 2010s | 3.1% | 1.8% | 5.5% | 10 |
| 2020s | 6.6% | 3.3% | 12.0% | 3 |
Countries ranked near Heard Island and McDonald Islands
- 58 Oman 3.4% compare
- 59 Gambia 3.4% compare
- 60 El Salvador 3.3% compare
- 62 Benin 3.2% compare
- 63 South Korea 3.1% compare
- 64 Bangladesh 3.0% compare
More reference data data for Heard Island and McDonald Islands
- Annual precipitation, annual growth rate 3.05 % change on previous year (2025)
- Exposure to extreme precipitation — Annual precipitation change -17.8 Millimetres per year (2023)
- Exposure to extreme temperature — Annual temperature change 0.729 Degrees celsius (2023)
- Red List Index 0.93 index (2025)
- Annual temperature anomalies 0.8308 °C (2025)
- Average annual surface temperature 2.45 °C (2025)
- Member countries of the International Treaty on Plant Genetic Resources for Food and Agriculture 0 number (2025)
- Annual area burnt by wildfires 0 hectares (2026)
- Annual number of wildfires 0 wildfires (2026)
- Annual area burnt per wildfire vs. number of fires 0 wildfires (2026)
Frequently asked questions
- What is chlorophyll-a deviation from the global average in Heard Island and McDonald Islands?
- Chlorophyll-a deviation from the global average in Heard Island and McDonald Islands was 3.3% 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 Heard Island and McDonald Islands?
- The highest recorded value was 12.0% in 2021.
- What is the lowest chlorophyll-a deviation from the global average recorded in Heard Island and McDonald Islands?
- The lowest recorded value was 1.5% in 2005.
- How does Heard Island and McDonald Islands rank for chlorophyll-a deviation from the global average?
- Heard Island and McDonald Islands ranks 61st out of 195 countries with data for 2022.
- Is chlorophyll-a deviation from the global average rising or falling in Heard Island and McDonald Islands?
- Over the last ten years it is down 3.3%. The long-run trend across the full record is volatile.
- Where does this Heard Island and McDonald Islands 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.
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CSV · JSON — 18 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Chlorophyll-a deviations, remote sensing (%).