Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/rs4113364 |
How Normalized Difference Vegetation Index (NDVI) Trends from Advanced Very High Resolution Radiometer (AVHRR) and Systeme Probatoire d’Observation de la Terre VEGETATION (SPOT VGT) Time Series Differ in Agricultural Areas: An Inner Mongolian Case Study | |
Yin, He1; Udelhoven, Thomas2; Fensholt, Rasmus3; Pflugmacher, Dirk1; Hostert, Patrick1 | |
通讯作者 | Yin, He |
来源期刊 | REMOTE SENSING
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ISSN | 2072-4292 |
出版年 | 2012 |
卷号 | 4期号:11页码:3364-3389 |
英文摘要 | Detailed information from global remote sensing has greatly advanced our understanding of Earth as a system in general and of agricultural processes in particular. Vegetation monitoring with global remote sensing systems over long time periods is critical to gain a better understanding of processes related to agricultural change over long time periods. This specifically relates to sub-humid to semi-arid ecosystems, where agricultural change in grazing lands can only be detected based on long time series. By integrating data from different sensors it is theoretically possible to construct NDVI time series back to the early 1980s. However, such integration is hampered by uncertainties in the comparability between different sensor products. To be able to rely on vegetation trends derived from integrated time series it is therefore crucial to investigate whether vegetation trends derived from NDVI and phenological parameters are consistent across products. In this paper we analyzed several indicators of vegetation change for a range of agricultural systems in Inner Mongolia, China, and compared the results across different satellite archives. Specifically, we compared two of the prime NDVI archives-AVHRR Global Inventory Modeling and Mapping Studies (GIMMS) and SPOT Vegetation (VGT) NDVI. Because a true accuracy assessment of long time series is not possible, we further compared SPOT VGT NDVI with NDVI from MODIS Terra as a benchmark. We found high similarities in interannual trends, and also in trends of the seasonal amplitude and integral between SPOT VGT and MODIS Terra (r > 0.9). However, we observed considerable disagreements in NDVI-derived trends between AVHRR GIMMS and SPOT VGT. We detected similar discrepancies for trends based on phenological parameters, such as amplitude and integral of NDVI curves corresponding to seasonal vegetation cycles. Inconsistencies were partially related to land cover and vegetation density. Different pre-processing schemes and the coarser spatial resolution of AVHRR GIMMS introduced further uncertainties. Our results corroborate findings from other studies that vegetation trends derived from AVHRR GIMMS data not always reflect true vegetation changes. A more thorough understanding of the factors introducing uncertainties in AVHRR GIMMS time series is needed, and we caution against using AVHRR GIMMS data in regional studies without applying regional sensitivity analyses. |
英文关键词 | NDVI trend analysis AVHRR GIMMS SPOT VGT MODIS Terra Inner Mongolia agriculture |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Denmark |
收录类别 | SCI-E |
WOS记录号 | WOS:000313914500006 |
WOS关键词 | NET PRIMARY PRODUCTION ; SATELLITE SENSOR DATA ; REMOTE-SENSING DATA ; WATER-QUALITY ; MONITORING VEGETATION ; COVER CLASSIFICATION ; ENVIRONMENTAL-CHANGE ; PHENOLOGICAL CHANGE ; SURFACE PHENOLOGY ; SPRING PHENOLOGY |
WOS类目 | Remote Sensing |
WOS研究方向 | Remote Sensing |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/174788 |
作者单位 | 1.Univ Berlin, Dept Geog, D-10099 Berlin, Germany; 2.Univ Trier, Environm Remote Sensing & Geoinformat Dept, D-54286 Trier, Germany; 3.Univ Copenhagen, Dept Geog & Geol, DK-1350 Copenhagen, Denmark |
推荐引用方式 GB/T 7714 | Yin, He,Udelhoven, Thomas,Fensholt, Rasmus,等. How Normalized Difference Vegetation Index (NDVI) Trends from Advanced Very High Resolution Radiometer (AVHRR) and Systeme Probatoire d’Observation de la Terre VEGETATION (SPOT VGT) Time Series Differ in Agricultural Areas: An Inner Mongolian Case Study[J],2012,4(11):3364-3389. |
APA | Yin, He,Udelhoven, Thomas,Fensholt, Rasmus,Pflugmacher, Dirk,&Hostert, Patrick.(2012).How Normalized Difference Vegetation Index (NDVI) Trends from Advanced Very High Resolution Radiometer (AVHRR) and Systeme Probatoire d’Observation de la Terre VEGETATION (SPOT VGT) Time Series Differ in Agricultural Areas: An Inner Mongolian Case Study.REMOTE SENSING,4(11),3364-3389. |
MLA | Yin, He,et al."How Normalized Difference Vegetation Index (NDVI) Trends from Advanced Very High Resolution Radiometer (AVHRR) and Systeme Probatoire d’Observation de la Terre VEGETATION (SPOT VGT) Time Series Differ in Agricultural Areas: An Inner Mongolian Case Study".REMOTE SENSING 4.11(2012):3364-3389. |
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