All-sky camera system providing high temporal resolution annual time series of irradiance in the arctic

Johnsen, Geir and Zolich, Artur and Grant, Stephen and Bjørgum, Rune and Cohen, Jonathan H. and McKee, David and Kopec, Tomasz P. and Vogedes, Daniel and Berge, Jørgen (2021) All-sky camera system providing high temporal resolution annual time series of irradiance in the arctic. Applied Optics, 60 (22). pp. 6456-6468. ISSN 1559-128X

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    Abstract

    The ArcLight observatory provides hourly continuous time series of light regime data (intensity, spectral composition, and photoperiod) fromthe Arctic, Svalbard at 79_ N.Until now, no complete annual time series of biologically relevant light has been provided from the high Arctic due to insufficient sensitivity of commercial light sensors during the Polar Night. We describe a camera system providing all-sky images and the corresponding integrated spectral irradiance (EPAR) in energy or quanta units, throughout a complete annual cycle. We present hourly- diel-annual dynamics from 2017 to 2020 of irradiance and its relation to weather conditions, sun and moon trajectories.

    ORCID iDs

    Johnsen, Geir, Zolich, Artur, Grant, Stephen, Bjørgum, Rune, Cohen, Jonathan H., McKee, David ORCID logoORCID: https://orcid.org/0000-0001-8023-5923, Kopec, Tomasz P., Vogedes, Daniel and Berge, Jørgen;