Remote Sens. 2013, 5(10), 4799-4818; doi:10.3390/rs5104799

Global Trends in Seasonality of Normalized Difference Vegetation Index (NDVI), 1982–2011

1,2,†,* email, 1,2,†email, 3,†email, 2email and 4email
Received: 8 July 2013; in revised form: 20 September 2013 / Accepted: 23 September 2013 / Published: 30 September 2013
(This article belongs to the Special Issue Monitoring Global Vegetation with AVHRR NDVI3g Data (1981-2011))
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: A 30-year series of global monthly Normalized Difference Vegetation Index (NDVI) imagery derived from the Global Inventory Modeling and Mapping Studies (GIMMS) NDVI3g archive was analyzed for the presence of trends in changing seasonality. Using the Seasonal Trend Analysis (STA) procedure, over half (56.30%) of land surfaces were found to exhibit significant trends. Almost half (46.10%) of the significant trends belonged to three classes of seasonal trends (or changes). Class 1 consisted of areas that experienced a uniform increase in NDVI throughout the year, and was primarily associated with forested areas, particularly broadleaf forests. Class 2 consisted of areas experiencing an increase in the amplitude of the annual seasonal signal whereby increases in NDVI in the green season were balanced by decreases in the brown season. These areas were found primarily in grassland and shrubland regions. Class 3 was found primarily in the Taiga and Tundra biomes and exhibited increases in the annual summer peak in NDVI. While no single attribution of cause could be determined for each of these classes, it was evident that they are primarily found in natural areas (as opposed to anthropogenic land cover conversions) and that they are consistent with climate-related ameliorations of growing conditions during the study period.
Keywords: NDVI; GIMMS NDVI3g; Seasonal Trend Analysis; AVHRR; phenology
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MDPI and ACS Style

Eastman, J.R.; Sangermano, F.; Machado, E.A.; Rogan, J.; Anyamba, A. Global Trends in Seasonality of Normalized Difference Vegetation Index (NDVI), 1982–2011. Remote Sens. 2013, 5, 4799-4818.

AMA Style

Eastman JR, Sangermano F, Machado EA, Rogan J, Anyamba A. Global Trends in Seasonality of Normalized Difference Vegetation Index (NDVI), 1982–2011. Remote Sensing. 2013; 5(10):4799-4818.

Chicago/Turabian Style

Eastman, J. R.; Sangermano, Florencia; Machado, Elia A.; Rogan, John; Anyamba, Assaf. 2013. "Global Trends in Seasonality of Normalized Difference Vegetation Index (NDVI), 1982–2011." Remote Sens. 5, no. 10: 4799-4818.

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