Linköping vs Mariehamn
Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.
Mariehamn has more tree cover — 72.7% against 41.4%.
Mariehamn has cleaner air right now — AQI 36 against 45.
- Tree cover gap
- 31.3 points
- Mariehamn is ahead.
- Air quality gap
- 9 AQI
- Mariehamn is cleaner.
- Trees between them
- 12.6K
- Mariehamn has more standing.
Tree cover
Share of the 2 km radius under canopy.
41.4%
72.7%
Air quality index
US EPA index, live, with its band. Lower is better.
45 · Good
36 · Good
Trees standing
Estimated from the measured canopy area.
129K
142K
Trees still needed
To reach the same canopy target. Fewer is better.
0
0
CO₂ absorbed each year
By the trees already standing.
2.8M kg
3.1M kg
Air quality in detail
What each city is breathing
Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Linköping is read from nearby ground stations and Mariehamn is modelled — worth knowing, since the two are not quite like for like.
PM2.5
Fine particles, the pollutant that usually sets the index.
10.8 µg/m³
3.2 µg/m³
The last week, day by day
A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.
| Day | Linköping | Mariehamn |
|---|---|---|
| 22 Sept | 22 | 25 |
| 23 Sept | 19 | 24 |
| 24 Sept | 22 | 22 |
| 25 Sept | 19 | 24 |
| 26 Sept | 30 | 25 |
| 27 Sept | 27 | 27 |
| 28 Sept | 33 | 34 |
Reading these numbers
What is actually being measured
Tree cover
The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Mariehamn leads here at 72.7%.
Air quality index
The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Linköping reads 45 (good) and Mariehamn reads 36 (good) right now.
Frequently asked
Linköping and Mariehamn, answered
Which has more trees, Linköping or Mariehamn?
Mariehamn, with roughly 142,061 trees inside its 2 km radius against 129,412. Tree cover tells a slightly different story from raw count: Mariehamn has the denser canopy at 72.7%.
Which has better air quality, Linköping or Mariehamn?
Mariehamn right now, at AQI 36 against 45 — a gap of 9 points. This is a live reading rather than an annual average, so it can reverse within a day.
How many more trees does each city need?
Linköping needs about 0 more to reach its canopy target, and Mariehamn about 0. The target is the same share of ground for both, so the figures are directly comparable.
Are these two measured the same way?
Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.
Keep going
Other comparisons nearby
- Linköping vs Örebro47% tree cover · AQI 24Compare
- Linköping vs Jönköping59% tree cover · AQI 40Compare
- Linköping vs Västerås51% tree cover · AQI 30Compare
- Linköping vs Stockholm29% tree cover · AQI 22Compare
- Linköping vs Uppsala44% tree cover · AQI 30Compare
- Linköping vs Sollentuna69% tree cover · AQI 22Compare
Build your own
Compare Linköping with somewhere else
This place
Linköping
Want a different pair? Browse comparisons or measure any address.