(Table 2) Temporal changes in phenological observations between 1978 and 2007, northern Sweden

A 30-year series (1978-2007) of photographic records were analysed to determine changes in lake ice cover, local (low elevation) and montane (high elevation) snow cover and phenological stages of mountain birch (Betula pubescens ssp. czerepanovii) at the Abisko Scientific Research Station, Sweden. I...

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Bibliographic Details
Main Authors: Andrews, Christopher, Dick, Jan, Jonasson, Christer, Callaghan, Terry V
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Abisko_ANSt
Abisko
Lappland
northern Sweden
DATE/TIME
Difference
International Polar Year (2007-2008)
IPY
Number
Observation
Photo/Video
Photography
PV
Standard error
Arctic
International Polar Year
Northern Sweden
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.806955
https://doi.org/10.1594/PANGAEA.806955
Description
Summary:A 30-year series (1978-2007) of photographic records were analysed to determine changes in lake ice cover, local (low elevation) and montane (high elevation) snow cover and phenological stages of mountain birch (Betula pubescens ssp. czerepanovii) at the Abisko Scientific Research Station, Sweden. In most cases, the photographic-derived data showed no significant difference in phenophase score from manually observed field records from the same period, demonstrating the accuracy and potential of using weekly repeat photography as a quicker, cheaper and more adaptable tool to remotely study phenology in both biological and physical systems. Overall, increases in ambient temperatures coupled with decreases in winter ice and snow cover, and earlier occurrence of birch foliage, signal a reduction in the length of winter, a shift towards earlier springs and an increase in the length of available growing season in the Swedish sub-arctic.

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