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

The ArcLight observatory provides hourly continuous time series of light regime data (intensity, spectral composition, and photoperiod) from the 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 insuffici...

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Bibliographic Details
Published in:Applied Optics
Main Authors: Johnsen, Geir, Zolich, Artur, Grant, Stephen, Bjorgum, Rune, Cohen, Jonathan H., Mckee, David, Kopec, Tomasz Piotr, Vogedes, Daniel Ludwig, Berge, Jorgen
Format: Article in Journal/Newspaper
Language:English
Published: Optical Society of America 2021
Subjects:
VDP::Mathematics and natural science: 400::Zoology and botany: 480
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480
Arctic
Svalbard
polar night
Online Access:https://hdl.handle.net/10037/22096
https://doi.org/10.1364/AO.424871
Description
Summary:The ArcLight observatory provides hourly continuous time series of light regime data (intensity, spectral composition, and photoperiod) from the 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 (????� PAR ) 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.

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