Results 291 to 300 of about 117,891 (325)

Global correlation analysis for NDVI and climatic variables and NDVI trends: 1982-1990

International Journal of Remote Sensing, 2002
The relationship between the Normalized Difference Vegetation Index (NDVI) and climatic variables was analysed on a global scale using the Pathfinder AVHRR Land NDVI data set, and observed climate data for the period 1982-1990. A significant correlation between interannual NDVI and temperature variation was recognized in the northern mid- to high ...
K. Ichii, A. Kawabata, Y. Yamaguchi
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Yukon River Discharge-NDVI Relationship

2020
Similar to the Mackenzie River, a strong seasonal consistency between NDVI and discharge exists for Yukon River. The flow-NDVI association is particularly strong before June, discharge rapidly rises and reaches the peak the 1st half of June, while the NDVI in the period of April to June increases fastest and reaches the maximum in July.
Weixin Xu, Daqing Yang
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Sensor intercalibration - adjustment of MODIS-NDVI-to NOAA-AVHRR-NDVI data

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
The Normalized Difference Vegetation Index (NDVI) is the most often used vegetation index to study environmental change. Usually, NOAA-Advanced Very High Resolution Radiometer (AVHRR)-data are used to calculate the NDVI, because these data are available for more than 20 years. Today, data with an improved quality like the one of EOS-Moderate Resolution
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Mapping precipitation-corrected NDVI trends across Namibia

Science of The Total Environment, 2019
Savannas comprise a major component of the Earth system and contribute ecosystem services and functions essential to human livelihoods. Monitoring spatial and temporal trends in savanna vegetation and understanding change drivers is therefore crucial. Widespread greening has been identified across southern Africa; yet its drivers and manifestations on ...
Vladimir R. Wingate, Stuart R. Phinn, Nikolaus Kuhn   +2 more
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[Performance evaluation of GIMMS NDVI based on MODIS NDVI and SPOT NDVI data].

Ying yong sheng tai xue bao = The journal of applied ecology, 2019
The study evaluated GIMMS NDVI based on MODIS NDVI and SPOT NDVI over the same period from 2000 to 2015. We assessed their absolute values, dynamics, trends and cross-relationships between any two of the NDVIs for the national scale, as well as four separate land use types, i.e., paddy field, dry land, forest, and grassland.
Yi Xuan, Zhu, Yang Jian, Zhang, Jia Xing, Zu, Bin, Che, Ze, Tang, Nan, Cong, Jun Xiang, Li, Ning, Chen   +7 more
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NDVI Optimization Using Genetic Algorithm

2011 7th Iranian Conference on Machine Vision and Image Processing, 2011
Applying ratioing on multispectral images is one of the important techniques used in remote sensing. In this paper a formula containing multiplication, addition and a division at the end is proposed to calculate a measure for classifying land covers. Applying this formula on each pixel of the multispectral image together with a set of thresholds, one ...
Peyman Kabiri, Mohammad H. Pandi, Sirous Kourki Nejat, Hamid Ghaderi   +3 more
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Temporal variations of NDVI and correlations between NDVI and hydro-climatological variables at Lake Baiyangdian, China

International Journal of Biometeorology, 2013
In this paper, correlations between vegetation dynamics (represented by the normalized difference vegetation index (NDVI)) and hydro-climatological factors were systematically studied in Lake Baiyangdian during the period from April 1998 to July 2008. Six hydro-climatological variables including lake volume, water level, air temperature, precipitation,
Fei, Wang, Xuan, Wang, Ying, Zhao, Zhifeng, Yang   +3 more
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An extended AVHRR 8‐km NDVI dataset compatible with MODIS and SPOT vegetation NDVI data

International Journal of Remote Sensing, 2005
Daily daytime Advanced Very High Resolution Radiometer (AVHRR) 4‐km global area coverage data have been processed to produce a Normalized Difference Vegetation Index (NDVI) 8‐km equal‐area dataset from July 1981 through December 2004 for all continents except Antarctica.
Compton J. Tucker, Jorge E. Pinzon, Molly E. Brown, Daniel A. Slayback, Edwin W. Pak, Robert Mahoney, Eric F. Vermote, Nazmi El Saleous   +7 more
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Spatial-Temporal Changes of Vegetation Restoration in Yan'an Based on MODIS NDVI and Landsat NDVI

2019 IEEE International Conference on Signal, Information and Data Processing (ICSIDP), 2019
In order to investigate the features of surface vegetation change in Yan'an during later stage of the Grain for Green Project (GGP), and to study the vegetation restoration since the construction of north area of Yan'an new area. This study, based on MODIS-NDVI, aims to analyze the spatial-temporal trend changes of vegetation coverage in Yan'an.
Zihui Zhi, Hao Yin, Na Lu, Xinxin Zhang, Kun Yu, Xu Guo, Hao Qi   +6 more
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Agreement assessment of NOAA/AVHRR NDVI with Landsat TM NDVI for mapping burned forested areas

International Journal of Remote Sensing, 2002
Meteorological satellites are appropriate for operational applications related to early warning, monitoring and damage assessment of forest fires. Environmental or resources satellites, with better spatial resolution than meteorological satellites, enable the delineation of the affected areas with a higher degree of accuracy.
C. Domenikiotis, N. R. Dalezios, A. Loukas, M. Karteris   +3 more
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