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Examination of Surface Temperature Modification by Open-Top Chambers along Moisture and Latitudinal Gradients in Arctic Alaska Using Thermal Infrared Photography

NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
Department of Biological Sciences, Florida International University, 11200 SW 8th St., Miami, FL 33199, USA
Department of Biological Sciences, Grand Valley State University, 212 Henry Hall, 1 Campus Dr., Allendale, MI 49401, USA
Author to whom correspondence should be addressed.
Academic Editors: Santonu Goswami, Janet Elizabeth Nichol, Richard Gloaguen and Prasad S. Thenkabail
Remote Sens. 2016, 8(1), 54;
Received: 25 July 2015 / Revised: 22 December 2015 / Accepted: 30 December 2015 / Published: 11 January 2016
(This article belongs to the Special Issue Remote Sensing of Changing Northern High Latitude Ecosystems)
PDF [6170 KB, uploaded 11 January 2016]


Passive warming manipulation methodologies, such as open-top chambers (OTCs), are a meaningful approach for interpretation of impacts of climate change on the Arctic tundra biome. The magnitude of OTC warming has been studied extensively, revealing an average plot-level warming of air temperature that ranges between 1 and 3 °C as measured by shielded resistive sensors or thermocouples. Studies have also shown that the amount of OTC warming depends in part on location climate, vegetation, and soil properties. While digital infrared thermometers have been employed in a few comparisons, most of the focus of the effectiveness of OTC warming has been on air or soil temperature rather than tissue or surface temperatures, which directly translate to metabolism. Here we used thermal infrared (TIR) photography to quantify tissue and surface temperatures and their spatial variability at a previously unavailable resolution (3–6 mm2). We analyzed plots at three locations that are part of the International Tundra Experiment (ITEX)-Arctic Observing Network (AON-ITEX) network along both moisture and latitudinal gradients spanning from the High Arctic (Barrow, AK, USA) to the Low Arctic (Toolik Lake, AK, USA). Our results show a range of OTC surface warming from 2.65 to 1.27 °C (31%–10%) at our three sites. The magnitude of surface warming detected by TIR imagery in this study was comparable to increases in air temperatures previously reported for these sites. However, the thermal images revealed wide ranges of surface temperatures within the OTCs, with some surfaces well above ambient unevenly distributed within the plots under sunny conditions. We note that analyzing radiometric temperature may be an alternative for future studies that examine data acquired at the same time of day from sites that are in close geographic proximity to avoid the requirement of emissivity or atmospheric correction for validation of results. We foresee future studies using TIR photography to describe species-level thermodynamics that could prove highly valuable toward a better understanding of species-specific responses to climate change in the Arctic. View Full-Text
Keywords: remote sensing; thermal imagery; open-top chamber; Arctic; Alaska remote sensing; thermal imagery; open-top chamber; Arctic; Alaska

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Healey, N.C.; Oberbauer, S.F.; Hollister, R.D. Examination of Surface Temperature Modification by Open-Top Chambers along Moisture and Latitudinal Gradients in Arctic Alaska Using Thermal Infrared Photography. Remote Sens. 2016, 8, 54.

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