Lake Paajarvi (southern Finland, Europe 60º04’ N, 25º08’ E)Lake PääjärviAutomated monitoring station

southern boreal vegetation zone(airT 3.6ºC, precip 660 mm/a )▪ dimictic, humic, oligo-

mesotrophy▪ A 13.4 km2, zmax 85 m▪ ice cover ~150 d

Nov/Dec-Apr/May

Buoy Station▪ met-variables 2001 ▪ temp, O2, pH, conductivity, chl-

a,color (DOC) 2006/7

photos: llpo Hakala

Lake Vesijärvi, southern Finland

lake A 111 km2, Catchment A 509 km2

Max depth 42 m, Mean depth 6 m

Mean retention time 5.4 yrs

Long history of pollution and partial recovery

Map: www.vesku.net / Nevicom Oy

Va a sa

Ko kko la

Kuo p io

J yvä skylä

Ka ja a ni

O ulu

Ro va nie m i

Ta m p e rePo ri

Turku

He lsinki

La p p e e nra nta

J o e nsuu

100 km

Water temperature (5,10,15,20,25,30m)Dissolved oxygen ― II ―Chlorophyll a (2, 7 12 m)Turbidity ― II ―Frequency: every 3-hrs, open water period

2 new stations to the lake in 2007

http://www.vesku.net/?Mittausasema

Automatic monitoring station at Vesijärvi 2004->