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Studies on spatial pattern of NDVI over india and its relationship with rainfall, air temperature, soil moisture adequacy and ENSO

Lakshmi Kumar, TV and Rao, KK and Barbosa, H and Jothi, EP (2013) Studies on spatial pattern of NDVI over india and its relationship with rainfall, air temperature, soil moisture adequacy and ENSO. Geofizika, 30 (1). pp. 1-18.

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Abstract

The changes in spatial distribution of Advanced Very High Resolution Radiometer (AVHRR) Normalized Difference Vegetation Index (NDVI) are studied for different seasons in India for the period 1982 to 2000. The inter-annual variability of All India NDVI (AINDVI) has been studied and related to rainfall, air temperature, soil moisture adequacy, Southern Oscillation Index (SOI) and Nino 3 Sea Surface Temperature (Nino 3 SST) to understand the influence of these variables on vegetal cover. The results show that the NDVI is high during the south-west (June to September) monsoon and retreat (October and November) seasons where in major crop seasons Kharif and Rabi take place over India. The trend of AINDVI is increasing and displayed higher values during La Niña and lower in El Niño episodes. The correlation between rainfall and NDVI of All India is not significant on monthly basis (+0.13) but it is more prominent when the cumulative annual amounts of rainfall are involved (+0.61). NDVI responded very well to the variations of soil moisture adequacy (SAD) which enumerates the strongest correlation (+0.73) of crop performance with NDVI. This significant strong correlation inferred that SAD can be taken as the indicator for the NDVI variations rather rainfall. The linear regression analysis of AINDVI and the ENSO indices revealed the strong impact of sea surface temperatures than SOI on vegetation pattern over India.

Item Type: Article
Additional Information: Copyright of this article belongs to Geofizika
Uncontrolled Keywords: air temperature; annual variation; AVHRR; El Nino-Southern Oscillation; monsoon; NDVI; rainfall; regression analysis; satellite data; sea surface temperature; soil moisture; spatial distribution, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 19 Nov 2015 03:56
Last Modified: 19 Nov 2015 03:56
URI: http://moeseprints.incois.gov.in/id/eprint/2890

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