| Land | Observationsplats | Införda | År | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| Alaska | Burger study area | 2009 - 2009 | rare | 119353 | |
| Alaska | Burger study area | 2009 - 2009 | rare | 119353 | |
| Alaska | Burger study area | 2010 - 2010 | rare | 119353 | |
| Alaska | Klondike study area | 2010 - 2010 | rare | 119353 | |
| Alaska | Statoil study area | 2010 - 2010 | rare | 119353 |