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Five years of land surface phenology in a large-scale flooding and draining manipulation in a coastal Arctic ecosystem

Santonu Goswami, John A. Gamon, Sergio Vargas, Craig E. Tweedie
doi: https://doi.org/10.1101/146662
Santonu Goswami
University of Texas at El Paso;
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  • For correspondence: santonu.isro@gmail.com
John A. Gamon
University of Alberta
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Sergio Vargas
University of Texas at El Paso;
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Craig E. Tweedie
University of Texas at El Paso;
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Abstract

This study was motivated by the knowledge gap for observing the complex interplay between surface hydrology and plant phenology in arctic landscapes and was conducted as part of a large scale, multi investigator flooding and draining experiment near Barrow, Alaska during 2005-2009. Hyperspectral reflectance data were collected in the visible to near IR region of the spectrum using a robotic tram system that operated along a 300m transects during the snow free growing period between June and August, 2005-09. Interannual patterns of land-surface phenology (NDVI) unexpectedly lacked marked differences under experimental conditions. Measurement of NDVI was, however, compromised for presence of surface water. Land-surface phenology and surface water was negatively correlated, which held when scaled to a 2km by 2km MODIS subset of the study area. This result suggested that published findings of greening of the Arctic may relate to a ‘drying of the Arctic’ i.e. reduced surface water in vegetated high-latitude landscapes where surface water is close to ground level.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.
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Posted June 07, 2017.
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Five years of land surface phenology in a large-scale flooding and draining manipulation in a coastal Arctic ecosystem
Santonu Goswami, John A. Gamon, Sergio Vargas, Craig E. Tweedie
bioRxiv 146662; doi: https://doi.org/10.1101/146662
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Five years of land surface phenology in a large-scale flooding and draining manipulation in a coastal Arctic ecosystem
Santonu Goswami, John A. Gamon, Sergio Vargas, Craig E. Tweedie
bioRxiv 146662; doi: https://doi.org/10.1101/146662

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