Chlorophyll-a deviation from the global average in Guernsey
Guernsey: Chlorophyll-a deviation from the global average was 0.5% in 2022. ◆ Volatile
Chlorophyll-a deviation from the global average in Guernsey, 2005–2022
Source: UN Statistics Division – processed by Our World in Data. Measured in %.
Analysis
Guernsey recorded 0.5% for chlorophyll-a deviation from the global average in 2022.
Compared with earlier readings it is down 39.8% on the previous year and up 2.0% over ten years.
Over the whole period, chlorophyll-a deviation from the global average in Guernsey peaked at 35.3% in 2014 and was at its lowest, 0.5%, in 2012.
Guernsey ranks 127th of 195 countries on this measure, 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 Guernsey, year by year
| Year | % | Change |
|---|---|---|
| 2005 | 8.6% | — |
| 2006 | 4.2% | -50.6% |
| 2007 | 8.0% | +89.8% |
| 2008 | 4.2% | -47.8% |
| 2009 | 4.4% | +5.7% |
| 2010 | 6.3% | +42.5% |
| 2011 | 4.2% | -33.0% |
| 2012 | 0.5% | -88.4% |
| 2013 | 2.8% | +479.6% |
| 2014 | 35.3% | +1142.3% |
| 2015 | 2.9% | -91.8% |
| 2016 | 1.1% | -62.6% |
| 2017 | 0.9% | -17.6% |
| 2018 | 1.4% | +52.8% |
| 2019 | 2.9% | +116.2% |
| 2020 | 1.2% | -58.2% |
| 2021 | 0.8% | -32.5% |
| 2022 | 0.5% | -39.8% |
Biggest year-on-year movements
Years where Chlorophyll-a deviation from the global average in Guernsey changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2014 | +1142.3% | 2.8% | 35.3% |
| 2013 | +479.6% | 0.5% | 2.8% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2000s | 5.9% | 4.2% | 8.6% | 5 |
| 2010s | 5.8% | 0.5% | 35.3% | 10 |
| 2020s | 0.9% | 0.5% | 1.2% | 3 |
Countries ranked near Guernsey
- 126 Solomon Islands 0.5% compare
- 127 Palau 0.5% compare
- 129 Mozambique 0.5% compare
- 129 Tunisia 0.5% compare
More reference data data for Guernsey
- Wealth share of the richest 1% 22.9% (2024)
- Fertility rate: births per woman 1.36 live births per woman (2023)
- Exposure to extreme temperature — Annual temperature change 1.11 Degrees celsius (2023)
- Exposure to extreme precipitation — Annual precipitation change 207.61 Millimetres per year (2023)
- Average age of mothers at childbirth 30.7 years (2023)
- Fertility rate vs. Human Development Index 1.36 live births per woman (2023)
- Fertility rate: births per woman 1.36 live births per woman (2023)
- Area burned by wildfires by land cover type 0 hectares (2025)
- Wildfire area burned by land cover type 0 hectares (2025)
- Red List Index 0.95 index (2025)
Frequently asked questions
- What is chlorophyll-a deviation from the global average in Guernsey?
- Chlorophyll-a deviation from the global average in Guernsey was 0.5% 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 Guernsey?
- The highest recorded value was 35.3% in 2014.
- What is the lowest chlorophyll-a deviation from the global average recorded in Guernsey?
- The lowest recorded value was 0.5% in 2012.
- How does Guernsey rank for chlorophyll-a deviation from the global average?
- Guernsey ranks 127th out of 195 countries with data for 2022.
- Is chlorophyll-a deviation from the global average rising or falling in Guernsey?
- Over the last ten years it is up 2.0%. The long-run trend across the full record is volatile.
- Where does this Guernsey 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 (%).