G
Geli Zhang
Researcher at University of Oklahoma
Publications - 49
Citations - 4249
Geli Zhang is an academic researcher from University of Oklahoma. The author has contributed to research in topics: Normalized Difference Vegetation Index & Vegetation. The author has an hindex of 27, co-authored 38 publications receiving 3091 citations. Previous affiliations of Geli Zhang include Chinese Academy of Sciences.
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Journal ArticleDOI
Green-up dates in the Tibetan Plateau have continuously advanced from 1982 to 2011
TL;DR: The alpine vegetation SOS in the Plateau experienced a continuous advancing trend at a rate of ∼1.04 d·y−1 from 1982 to 2011, which was consistent with observed warming in springs and winters and proved to be reliable with observed phenology data at 18 sites from 2003 to 2011.
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Mapping paddy rice planting area in northeastern Asia with Landsat 8 images, phenology-based algorithm and Google Earth Engine
Jinwei Dong,Xiangming Xiao,Xiangming Xiao,Michael A. Menarguez,Geli Zhang,Yuanwei Qin,David Thau,Chandrashekhar Biradar,Berrien Moore +8 more
TL;DR: The results indicated that the Landsat 8, GEE, and improved PPPM algorithm can effectively support the yearly mapping of paddy rice in NE Asia and has a high accuracy with the producer (user) accuracy of 73% (92%), based on the validation using very high resolution images and intensive field photos.
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A global moderate resolution dataset of gross primary production of vegetation for 2000–2016
Yao Zhang,Xiangming Xiao,Xiangming Xiao,Xiaocui Wu,Sha Zhou,Geli Zhang,Yuanwei Qin,Jinwei Dong +7 more
TL;DR: This paper provides a new GPP dataset at moderate spatial and temporal resolutions over the entire globe for 2000–2016 and employs a state-of-the-art vegetation index (VI) gap-filling and smoothing algorithm and a separate treatment for C3/C4 photosynthesis pathways.
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Tracking the dynamics of paddy rice planting area in 1986–2010 through time series Landsat images and phenology-based algorithms
Jinwei Dong,Jinwei Dong,Xiangming Xiao,Xiangming Xiao,Xiangming Xiao,Weili Kou,Weili Kou,Yuanwei Qin,Geli Zhang,Li Li,Li Li,Cui Jin,Yuting Zhou,Jie Wang,Chandrashekhar Biradar,Jiyuan Liu,Berrien Moore +16 more
TL;DR: Wang et al. as mentioned in this paper developed an automated, Landsat-based paddy rice mapping (Landsat-RICE) system that uses time series Landsat images and a phenology-based algorithm based on the unique spectral characteristics of paddy Rice during the flooding/transplanting phase.
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Multiple afforestation programs accelerate the greenness in the 'Three North' region of China from 1982 to 2013
Yao Zhang,Yao Zhang,Changhui Peng,Changhui Peng,Weizhong Li,Liuxi Tian,Liuxi Tian,Qiuan Zhu,Huai Chen,Xiuqin Fang,Geli Zhang,Guobin Liu,Xingmin Mu,Zhanbin Li,Shiqing Li,Yanzheng Yang,Jie Wang,Xiangming Xiao,Xiangming Xiao +18 more
TL;DR: Wang et al. as mentioned in this paper reported an increasing trend of greenness in the Three North region using the satellite-retrieved normalized difference vegetation index (NDVI) from GIMMS and MODIS datasets in the past 32 years.