Are cloud amounts estimated from satellite sensor and conventional surface-based observations related?

A. Henderson-Sellers, K. McGuffie

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A new basis for the relationship between the (vertical) earthview E of cloud amount and the (whole dome) skycover S of cloud amount has been sought. Over 4500 all-sky camera photographs, representing a considerable range of seasonal and climatological conditions, have been analysed to give rise to a database from which predictive relationships have been established. Cubic functions are the most soundly based both physically and empirically. We find 5=0.647 +2.192E−0.461E2 + 0.037E3 and E=−0.001 + 0.082S + 0.269S2−0.019S3 for the prediction of skycover from earthview and earthview from skycover respectively. If earthview is required from skycover observations then E ≈ S could be used with little additional error. Hence conventional surface observations of skycover could be compared directly with earthview values derived from satellite sensors.

Original languageEnglish
Pages (from-to)543-550
Number of pages8
JournalInternational Journal of Remote Sensing
Volume11
Issue number3
DOIs
Publication statusPublished - 1990

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