Conference paper
Monitoring of vegetation condition using the NDVI/ENSO anomalies in Central Asia and their relationships with ONI (very strong) phases
Proceedings Volume 10005, Earth Resources and Environmental Remote Sensing/GIS Applications VII, Vol.10005, pp.1-7
SPIE Remote Sensing, 2016 (Edinburgh, United Kingdom, 27-Sep-2016 - 29-Sep-2016)
SPIE Digital Library
2016
Abstract
An investigation of temporal dynamics of El Niño–Southern Oscillation (ENSO) and spatial patterns of dryness/wetness period over arid and semi-arid zones of Central Asia and their relationship with Normalized Difference Vegetation Index (NDVI) values (1982-2011) have explored in this article. For identifying periodical oscillations and their relationship with NDVI values have selected El Nino 3.4 index and thirty years of new generation bi-weekly NDVI 3g acquired by the Advanced Very High Resolution Radiometer (AVHRR) satellites time-series data. Based on identification ONI (Oceanic Nino Index) is a very strong El Nino (warm) anomalies observed during 1982-1983, 1997-1998 and very strong La Nino (cool) period events have observed 1988-1989 years. For correlation these two factors and seeking positive and negative trends it has extracted from NDVI time series data as “low productivity period” following years: 1982-1983, 1997 -1998; and as “high productivity period” following years: 1988 -1989. Linear regression observed warm events as moderate phase period selected between moderate El Nino (ME) and NDVI with following periods:1986-1987; 1987-1988; 1991-1992; 2002-2003; 2009-2010; and moderate La Niña (ML) periods and NDVI (1998-1999; 1999-2000; 2007-2008) which has investigated a spatial patterns of wetness conditions. The results indicated that an inverse relationship between very strong El Nino and NDVI, decreased vegetation response with larger positive ONI value; and direct relationship between very strong La Niña and NDVI, increased vegetation response with smaller negative ONI value. Results assumed that significant impact of these anomalies influenced on vegetation productivity. These results will be a beneficial for efficient rangeland/grassland management and to propose drought periods for assessment and reducing quantity of flocks’ due to a lack of fodder biomass for surviving livestock flocks on upcoming years in rangelands. Also results demonstrate that a non-anthropogenic drivers of variability effected to land surface vegetation signals, understanding of which will be beneficial for efficient rangeland and agriculture management and establish ecosystem services in precipitation-driven drylands of Central Asia.
Details
- Title
- Monitoring of vegetation condition using the NDVI/ENSO anomalies in Central Asia and their relationships with ONI (very strong) phases
- Authors
- Dildora Aralova (Author) - TU DresdenKristina Toderich (Author) - Samarkand State University named after Sharof RashidovBen Jarihani (Author) - University of the Sunshine Coast, Queensland, Sustainability Research CentreDilshod Gafurov (Author)Liliya Gismatulina (Author) - Samarkand State University named after Sharof Rashidov
- Publication details
- Proceedings Volume 10005, Earth Resources and Environmental Remote Sensing/GIS Applications VII, Vol.10005, pp.1-7
- Conference details
- SPIE Remote Sensing, 2016 (Edinburgh, United Kingdom, 27-Sep-2016 - 29-Sep-2016)
- Publisher
- SPIE Digital Library
- DOI
- 10.1117/12.2242164
- Organisation Unit
- University of the Sunshine Coast, Queensland; Sustainability Research Centre; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99522302802621
- Output Type
- Conference paper
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