| Title | Analysis of NOAA-9 Vegetation Index and Temperature Time Series of Wheat Fields in Western Canada |
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| Author | Toure, A; Condal, A; Brown, R J |
| Source | Canadian Journal of Remote Sensing 17, 1, 1991. |
| Year | 1991 |
| Alt Series | Earth Sciences Sector, Contribution Series 20042687 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Abstract | A 16-week NDVI and a channel 4 brightness temperature time series were used to study the relationship between wheat phenology and AVHRR parameters (NDVI and brightness temperature). Both the NDVI and
temperature time series showed definite trends that agree with previous results found in the literature. It was determined that the difference of satellite temperature and mid-day air temperature were useful for distinguishing two important
phenological phases: the growing period and the flowering-to-cutting period. The former is characterised by a decrease in the order of 1 to t °C per week, the latter by a rather stable temperature value. The analysis also showed that the NCVI and
the time series are correlated; this is attributed to an increase in the NDVI values during the growing period, which increases the vegetation transpiration rate, hence minimizing the difference in temperature between the soil vegetation and the air.
The NDVI standard compositing method is not able to eliminate clouds completely. |
| GEOSCAN ID | 219489 |
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