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Earth Observing Laboratory
Field Data Archive

Temperature, discharge and light data for Ivishak Hot Spring, Alaska

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Summary

The productivity of a perennial, Arctic spring-stream was investigated. Ivishak Spring has the stable discharge (~131 L/s) and temperature (~4-8 deg C) typical for springs. It is unusual, however, in having an annual cycle of daylight from 24 hrs/d (summer) to 0 hrs/d (winter). It was tested from the hypothesis that stored detritus would buffer carbon limitation during winter when gross primary production (GPP) is minimized, resulting in constant rates of community respiration (CR) year-round due to constant temperatures. Open-channel methods were used to measure GPP and CR monthly from March 2007 to August 2009. Mean annual GPP was 458 gC/m2. Such a level is typical for temperate desert streams but was surprising for an Arctic stream. Annual CR (887 gC/m2) was also remarkable. The high metabolism of this stream is explained by an open canopy, moderate year-round temperatures, stable bed, and high bryophyte biomass (48 gAFDM/m2). Strong seasonal cycles of GPP were mirrored by CR (r=0.65) indicating the possibility of carbon limitation during winter. This result falsified the hypothesis that CR would be relatively stable year-round due to a detritus buffer and constant temperature.

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Additional information

Identifier
Versions
  • 1.0 (2011-12-07)
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Related projects
Spatial Type point
Frequency 5 minute
Language English
Grant Code 0611995
ISO Topic Categories
  • inlandWaters
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GCMD Science Keywords Expand keywords
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Temporal coverage

Begin datetime 2006-08-08 00:00:00
End datetime 2009-08-05 23:59:59

Spatial coverage


Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 69.025, Minimum (South) Latitude: 69.024
Minimum (West) Longitude: -147.721, Maximum (East) Longitude: -147.719

Primary point of contact information

Alexander D. Huryn <huryn@bama.edu>

Additional contact information

Citation

Huryn, A., Benstead, J. 2011. Temperature, discharge and light data for Ivishak Hot Spring, Alaska. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6N014PT. Accessed 11 Feb 2025.

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NSF

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.