PI: Jeffrey Welker, Department of Biological Sciences, University of Alaska, Anchorage, AK 99508, 907-271-2701, afjmw1@uaa.alaska.edu

DATA CONTACT: Patrick Sullivan, Department of Biological Sciences, University of Alaska, Anchorage, AK 99508; 907-522-4828; paddy@uaa.alaska.edu

FUNDING SOURCE: NSF-0221606/0508408

DATASET OVERVIEW:
Dataset includes mid-day measurements of CO2 exchange in hummocks and pools with and without open-top experimental warming chambers (OTCs). Measurements were made using a LI-6200 and a clear acrylic 20 x 20 x 20 cm chamber over a 30 second period beginning 15 seconds after chamber placement. The study was carried out in a fen near Thule (Pituffik), Greenland (76 deg 33' N, 68 deg 30' W). Coverage is from 20040706- 20060818.

INSTRUMENT DESCRIPTION:
LI-6200

DATA COLLECTION AND PROCESSING:
CO2 flux data were corrected following Hooper et al. (2002) Oecologia, 132, 1-11.

DATA FORMAT:
Tab-delimited text

DATA REMARKS:
None

REFERENCES:
Sullivan, P.F., Arens, S.J.T., Chimner, R.A. and Welker, J.M. (2008) Temperature and microtopography interact to control carbon cycling in a high arctic fen. Ecosystems, 11, 61-76.