DOI: 10.3390/rs12040671
论文题名: Phenological characteristics of global ecosystems based on optical, fluorescence, and microwave remote sensing
作者: Dannenberg M. ; Wang X. ; Yan D. ; Smith W.
刊名: Remote Sensing
ISSN: 20724292
出版年: 2020
卷: 12, 期: 4 语种: 英语
英文关键词: Classification
; Normalized difference vegetation index (NDVI)
; Phenoregions
; Self-organizing maps (SOM)
; Solar-induced fluorescence (SIF)
; Time series analysis
; Vegetation optical depth (VOD)
Scopus关键词: Classification (of information)
; Climate change
; Conformal mapping
; Fluorescence
; Forestry
; Land use
; Optical properties
; Productivity
; Remote sensing
; Satellites
; Time series analysis
; Vegetation
; Video on demand
; Chlorophyll fluorescence
; Land surface phenology
; Microwave remote sensing
; Normalized difference vegetation index
; Phenoregions
; Solar-induced fluorescences
; Vegetation optical depth
; Vegetation structure and functions
; Self organizing maps
英文摘要: Growing seasons of vegetation generally start earlier and last longer due to anthropogenic warming. To facilitate the detection and monitoring of these phenological changes, we developed a discrete, hierarchical set of global "phenoregions" using self-organizing maps and three satellite-based vegetation indices representing multiple aspects of vegetation structure and function, including the normalized difference vegetation index (NDVI), solar-induced chlorophyll fluorescence (SIF), and vegetation optical depth (VOD). Here, wedescribe the distribution and phenological characteristics of these phenoregions, including their mean temperature and precipitation, differences among the three satellite indices, the number of annual growth cycles within each phenoregion and index, and recent changes in the land area of each phenoregion. We found that the phenoregions "self-organized" along two primary dimensions: degree of seasonality and peak productivity. The three satellite-based indices each appeared to provide unique information on land surface phenology, with SIF and VOD improving the ability to detect distinct annual and subannual growth cycles in some regions. Over the nine-year study period (limited in length by the short satellite SIF record), there was generally a decrease in the spatial extent of the highest productivity phenoregions, though whether due to climate or land use change remains unclear. © 2020 by the author. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159508
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Geographical and Sustainability Sciences, University of Iowa, Iowa City, IA 52242, United States; School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 85721, United States
Recommended Citation:
Dannenberg M.,Wang X.,Yan D.,et al. Phenological characteristics of global ecosystems based on optical, fluorescence, and microwave remote sensing[J]. Remote Sensing,2020-01-01,12(4)