Comparing different smoothing methods to detect double-cropping rice phenology based on LAI products - a case study in the Hunan province of China

doi:10.1080/01431161.2018.1460504

	Comparing different smoothing methods to detect double-cropping rice phenology based on LAI products - a case study in the Hunan province of China
	Wang, Chenzhi 1,2,3,4; Zhang, Zhao 1,2,3,4; Chen, Yi 5; Tao, Fulu 5,6; Zhang, Jing 1,2,3,4; Zhang, Wen 4
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	2018-10-02
卷号	39 期号:19 页码:6405-6428
ISSN号	0143-1161
DOI	10.1080/01431161.2018.1460504
通讯作者	Zhang, Zhao(zhangzhao@bnu.edu.cn)
英文摘要	Many studies have demonstrated the remarkable potential of assimilating remotely sensing leaf area index (LAI) products into crop models in estimating regional crop yield. To ensure the temporal consistency between crop models and remote-sensing system, it is prerequisite to derive the crop phenology information from the LAI products. However, previous studies mainly detected the phenology through the vegetation index (VI). Although some pieces of research applied LAI in phenology monitoring for trees and shrubs, fewer focused on crops, especially those with two or three growing seasons annually. Thus, which smoothing algorithm methods are suitable to obtain phenology of double-cropping rice and their difference in smoothing for crops are still unknown. Based on the Global Land Surface Satellite (GLASS)LAI products, we applied four favourite smoothing algorithms (Asymmetric Gaussian fitting, Double Logistic fitting, Savitzky-Golay filter, and Wavelet-based Filter method) to reduce noise and reconstruct the LAI profile and then detected the phenological information of double-cropping rice in Hunan Province. Compared with ground actual observations, we found that two fitting methods are not suitable to smooth double-cropping rice LAI, while the wavelet method performed the best. Based on the wavelet method, we estimated the phenological information of double-cropping rice at different regional scales as well and the results reflected that the accuracy of regional estimation is also acceptable. This study implied that the wavelet method is rather suitable to detect phenological information of crops from LAI products, which provides narrow gaps between two growing season. Our contribution can benefit researchers who focus on agriculture or remote sensing, especially those who would like to assimilate remotely sensed information into crop growth models.
资助项目	National Natural Science Foundation of China[41571493] ; National Natural Science Foundation of China[41571088] ; National Natural Science Foundation of China[31561143003] ; Academy of Finland[277403] ; Academy of Finland[292836] ; Academy of Finland[268277] ; Academy of Finland[292944] ; State Key Laboratory of Earth Surface Processes and Resource Ecology
WOS关键词	LEAF-AREA INDEX ; WINTER-WHEAT YIELD ; PHOTOSYNTHETICALLY ACTIVE RADIATION ; SATELLITE SENSOR DATA ; MODIS TIME-SERIES ; WAVELET TRANSFORM ; GLOBAL PRODUCTS ; MEKONG DELTA ; WOFOST MODEL ; LANDSAT TM
WOS研究方向	Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000449971700018
资助机构	National Natural Science Foundation of China ; Academy of Finland ; State Key Laboratory of Earth Surface Processes and Resource Ecology
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/52496]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Zhao
作者单位	1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, 19 Xinjiekou St, Beijing 100875, Peoples R China 2.Beijing Normal Univ, Acad Disaster Reduct & Emergency Management, Minist Civil Affairs, Beijing, Peoples R China 3.Beijing Normal Univ, Minist Educ, Beijing, Peoples R China 4.Beijing Normal Univ, Fac Geog Sci, Beijing, Peoples R China 5.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 6.Nat Resources Inst Finland Luke, Helsinki, Finland
推荐引用方式 GB/T 7714	Wang, Chenzhi,Zhang, Zhao,Chen, Yi,et al. Comparing different smoothing methods to detect double-cropping rice phenology based on LAI products - a case study in the Hunan province of China[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2018,39(19):6405-6428.
APA	Wang, Chenzhi,Zhang, Zhao,Chen, Yi,Tao, Fulu,Zhang, Jing,&Zhang, Wen.(2018).Comparing different smoothing methods to detect double-cropping rice phenology based on LAI products - a case study in the Hunan province of China.INTERNATIONAL JOURNAL OF REMOTE SENSING,39(19),6405-6428.
MLA	Wang, Chenzhi,et al."Comparing different smoothing methods to detect double-cropping rice phenology based on LAI products - a case study in the Hunan province of China".INTERNATIONAL JOURNAL OF REMOTE SENSING 39.19(2018):6405-6428.