Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region
The use of NOAA-AVHRR NDVI time series from July 1981 to December 2000 was evaluated for the assessment of the functioning of a wetland macrosystem, the Paraná River Delta. The spatial resolution of the dataset was 8 by 8 km. Spatial and temporal variations in NDVI pattern were analyzed and evidence...
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todo:paper_09212973_v23_n7_p833_Zoffoli2023-10-03T15:45:04Z Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region Zoffoli, M.L. Kandus, P. Madanes, N. Calvo, D.H. Autocorrelation function Ecosystem functioning El Niño/South oscillation Landscape mosaic NOAA-AVHRR NDVI Remote sensing Time series Wetlands macrosystems annual variation assessment method delta El Nino-Southern Oscillation estimation method NDVI rainfall remote sensing seasonal variation time series wetland Argentina Parana Delta South America The use of NOAA-AVHRR NDVI time series from July 1981 to December 2000 was evaluated for the assessment of the functioning of a wetland macrosystem, the Paraná River Delta. The spatial resolution of the dataset was 8 by 8 km. Spatial and temporal variations in NDVI pattern were analyzed and evidences for El Niño/South Oscillation events identified. We studied five wetland units (WUs) classified on the basis of landscape pattern and dominant hydrologic regime. Spearman rank correlations were performed among the NDVI time series of the different WUs. NDVI time series were correlated with water level in the Paraná River and with records of local rainfall. In order to obtain a synthetic model of NDVI patterns, the autocorrelation functions (ACF) were estimated for each of the WUs. Results indicated that monthly mean NDVI values for all WUs showed a similar annual seasonal pattern, suggesting a control from the plant annual cycle on the NDVI signal. Besides, two general NDVI patterns were identified. The first pattern is represented by WUs under fluvial hydrologic regime. This is subjected to a significative interannual variability associated mainly to ENSO events. The second pattern corresponds to WUs with a very regular NDVI patterns. It includes wetlands which water input corresponds to tides or to rainfall. The ENSO had no significant influence on this pattern. This study suggests that NOAA-AVHRR NDVI long time series might provide valuable information about functioning of the large scale fluvial wetlands like those associated with South America basins. © 2008 Springer Science+Business Media B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09212973_v23_n7_p833_Zoffoli |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Autocorrelation function Ecosystem functioning El Niño/South oscillation Landscape mosaic NOAA-AVHRR NDVI Remote sensing Time series Wetlands macrosystems annual variation assessment method delta El Nino-Southern Oscillation estimation method NDVI rainfall remote sensing seasonal variation time series wetland Argentina Parana Delta South America |
| spellingShingle |
Autocorrelation function Ecosystem functioning El Niño/South oscillation Landscape mosaic NOAA-AVHRR NDVI Remote sensing Time series Wetlands macrosystems annual variation assessment method delta El Nino-Southern Oscillation estimation method NDVI rainfall remote sensing seasonal variation time series wetland Argentina Parana Delta South America Zoffoli, M.L. Kandus, P. Madanes, N. Calvo, D.H. Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| topic_facet |
Autocorrelation function Ecosystem functioning El Niño/South oscillation Landscape mosaic NOAA-AVHRR NDVI Remote sensing Time series Wetlands macrosystems annual variation assessment method delta El Nino-Southern Oscillation estimation method NDVI rainfall remote sensing seasonal variation time series wetland Argentina Parana Delta South America |
| description |
The use of NOAA-AVHRR NDVI time series from July 1981 to December 2000 was evaluated for the assessment of the functioning of a wetland macrosystem, the Paraná River Delta. The spatial resolution of the dataset was 8 by 8 km. Spatial and temporal variations in NDVI pattern were analyzed and evidences for El Niño/South Oscillation events identified. We studied five wetland units (WUs) classified on the basis of landscape pattern and dominant hydrologic regime. Spearman rank correlations were performed among the NDVI time series of the different WUs. NDVI time series were correlated with water level in the Paraná River and with records of local rainfall. In order to obtain a synthetic model of NDVI patterns, the autocorrelation functions (ACF) were estimated for each of the WUs. Results indicated that monthly mean NDVI values for all WUs showed a similar annual seasonal pattern, suggesting a control from the plant annual cycle on the NDVI signal. Besides, two general NDVI patterns were identified. The first pattern is represented by WUs under fluvial hydrologic regime. This is subjected to a significative interannual variability associated mainly to ENSO events. The second pattern corresponds to WUs with a very regular NDVI patterns. It includes wetlands which water input corresponds to tides or to rainfall. The ENSO had no significant influence on this pattern. This study suggests that NOAA-AVHRR NDVI long time series might provide valuable information about functioning of the large scale fluvial wetlands like those associated with South America basins. © 2008 Springer Science+Business Media B.V. |
| format |
JOUR |
| author |
Zoffoli, M.L. Kandus, P. Madanes, N. Calvo, D.H. |
| author_facet |
Zoffoli, M.L. Kandus, P. Madanes, N. Calvo, D.H. |
| author_sort |
Zoffoli, M.L. |
| title |
Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| title_short |
Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| title_full |
Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| title_fullStr |
Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| title_full_unstemmed |
Seasonal and interannual analysis of wetlands in South America using NOAA-AVHRR NDVI time series: The case of the Parana Delta Region |
| title_sort |
seasonal and interannual analysis of wetlands in south america using noaa-avhrr ndvi time series: the case of the parana delta region |
| url |
http://hdl.handle.net/20.500.12110/paper_09212973_v23_n7_p833_Zoffoli |
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