Skip to data content Skip to data search

Alexandra Fiord Dry Tundra Ecosystem [Welker, J., J. Fahnestock]



The data set presented here represents growing season (late-1999, 2000 and 2001) values of net carbon dioxide exchange, photosynthesis, and respiration between the atmosphere and dry heath tundra. The site is located at Alexandra Fiord on the east-central side of Ellesmere Island, Nunavut, Canada at 78.54N 75.55W, 50 m elevation asl. As part of the International Tundra Experiment (ITEX), Greg Henry of the University of British Columbia has been increasing air and soil temperatures at this site since 1993 using small open-topped chambers (OTCs). These OTCs are hexagonal in shape and are constructed of transparent fiberglass. They typically raise air and soil temperatures by 1 to 4C. The data set shows periodic carbon dioxide exchange data from the end of the 1999 growing season and throughout the 2000 and 2001 growing seasons in ambient plots and long-term (7-9 yrs) warmed (OTC) plots. The most complete data set (2001) begins in spring before winter snowmelt and ends at the end of summer when snow has once again covered the ground. The data are from 199908040800 to 200108042400 UTC.

Data access

  • ORDER data for delivery by FTP

Additional information

  • 1.0 (2007-11-02)
Subscribe Subscribe to receive email when new or updated data is available.
Related projects
Spatial Type point
Frequency other
Language English
ISO Topic Categories
  • climatologyMeteorologyAtmosphere
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 1999-08-04 00:00:00
End datetime 2001-08-04 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 78.54, Minimum (South) Latitude: 78.54
Minimum (West) Longitude: -75.55, Maximum (East) Longitude: -75.55

Primary point of contact information

Jeff M. Welker <>

Additional contact information


Welker, J., Fahnestock, J. 2007. Alexandra Fiord Dry Tundra Ecosystem. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 21 Jun 2024.

Today's date is shown: please replace with the date of your most recent access.

Additional citation styles

The citation text below is from the DataCite Content Resolver service and may take a few seconds to load. The styles and locales are obtained from CrossCite, which also provides a citation formatter. See ReFindit for another alternative. Formatting is not perfect: please verify and edit before use. Today's date is shown: please replace with the date of your most recent access.

Style: Locale:

Ancillary information

Metadata download

Note that your browser may not display the above metadata links, but automatically save them as files in a folder such as "Downloads"