1. Wet deposition trends in Sweden during 1955 – 2011
Martin Ferm, Lennart Granat, Gunilla Pihl-Karlsson, Per Erik Karlsson and Karin Hansen.
6-8 May 2013

2. It is not difficult to collect rain water 
To do it in a quantitative way is, however, harder than we thought 

3. To minimize sampling of soil dust,
The sampler is placed at a comfortable
height above the ground.
The precipitation gauge will affect the wind field,
and thereby the trajectory of the meteor.
wind
gravity
&
friction

4. Dry deposition occurs all the time,
especially when it is raining.
To avoid dry deposition to the funnel or gauge during dry weather,
a wet-only collector can be used.
They are, however, not always aerodynamically designed.

5. Bird droppings contains a lot of NH4+ and causes high pH values

7. “Snow caps” or snowed under

8. Sampler type has varied over time and with the net work

9. Wind corrected and interpolated precipitation amounts in 4 x 4 km grids with a daily resolution between 1961 and 2011.

10. 346 sites have been used between 1955 and 2011.
1000 km
500

11. EACN network

13. Number of monthly measurements

14. Thank You!

15.
Publications
Publication number:
B2085