LTER network Toolik Field Station MBLhome page

Weather at Toolik

Toolik Weather Graphs

Arctic LTER Weather Stations

Toolik Webcam

Animated Gif of yesterday's Webcam

Arctic LTER Inhouse login

Toolik Lake

Research Overview

Bathymetric Map

Manipulation

Toolik has undergone no manipulation, it has been monitored since 1975 and serves as a reference lake for several whole lake ecosystem manipulations.

Lake Description

Toolik Lake is a deep kettle lake located on the North Slope of Alaska (68.3oN, 149.36oE). It is oligotrophic (annual production of 12g C/m2), stratifies with surface temperatures up to 18oC, and is ice-free from July through September. The surface temperature may reach 18oC, but the volume weighted summer temperature is 10-14oC (Miller et al. 1986). Toolik lake is dimictic despite its northern location. Ice cover, which may reach 1.4m thick, forms in early October. Toolik Lake typically stratifies in late June or early July when the thermocline is located at 5-7m and mixes in late August. For additional information please see the Arctic Lakes Research Overview.

Elevation (m): 719

Surface Area (ha): 150

Volume (cubic meters): 10,566,000

Mean Depth (m):

Max Depth (m):

Catchment Area (ha): 6688

Water Retention Time (years): 1.0

Fish

Arctic Grayling (Thymallus arcticus)

Slimy sculpin (Cottus cognatus)

Lake Trout (Salvelinus namaycush)

Round White fish (Prosopium cylindraceum)

Burbot (Lota lota)

Microplankton

Keratella cochlearis

Keratella quadrata

Kellicottia longispina

Polyarthra vulgaris

Chromogaster ecaudis

Conochilus unicornis

Filinia longiseta

Zooplankton

Daphnia middendorffiana

Heterocope septentrionalis

Holopedium gibberum

Daphnia longiremis

Bosmina longirostris

Diaptomus pribilofensis

Cyclops scutifer

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