MODELLING SOLAR RADIATION IN THE ARCTIC. AN IMPROVED METHOD FOR THE SUBDIVISION OF GLOBAL RADIATION

Authors
  1. Gardner, C.L.
  2. Nadeau, C.A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN);TGS Technology Inc, Sioux Falls SD (US);EROS Data Center, Sioux Falls SD (US)
Abstract
From an analysis of solar radiation data collected at Alert, N.W.T., it was shown previously that existing solar energy models overestimate slope irradiance at low solar elevation angles. In this technical note it is shown that this overestimation results from the breakdown of the relationship between sky condition and atmospheric transmittivity. In particular, at low solar elevations, the portion of the global radiation being attributed to direct radiation is overestimated. A new empirical relationship for the subdivision of global radiation at low solar elevations has been developed.
Report Number
DREO-TN-91-26 — Technical Note
Date of publication
15 Nov 1991
Number of Pages
20
DSTKIM No
92-00754
CANDIS No
103648
Format(s):
Hardcopy;Originator's fiche received by DSIS

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