气候变化领域集成服务门户(CCPortal): Seasonal dynamics of fallow and cropping lands in the broadacre cropping region of Australia

CCPortal

DOI	10.1016/j.rse.2024.114070
	Seasonal dynamics of fallow and cropping lands in the broadacre cropping region of Australia
	Xie, Zunyi; Zhao, Yan; Jiang, Ruizhu; Zhang, Miao; Hammer, Graeme; Chapman, Scott; Brider, Jason; Potgieter, Andries B.
发表日期	2024
ISSN	0034-4257
EISSN	1879-0704
起始页码	305
卷号	305
英文摘要	Fallowing is an important strategy for enhancing soil health, water harvesting and crop yields, thus improving sustainability and reducing production risks in dryland farming systems in Australia. However, accurate data regarding the location, frequency, extent, and duration of fallow land is not readily available at high spatiotemporal resolutions before and during a cropping season. As a result, continental maps depicting seasonal dynamics of fallow and cropping lands and their responses to climate change and human activities remain missing. This study set out to develop an automated approach to discriminate fallow areas from cropping areas within Australian broadacre cropping region. This was done by applying a mathematical algorithm of turning point detection technique to a curve fitted vegetation index time series from 2016 to 2022, derived from high spatial (10 m) and temporal (5-days) resolution Sentinel-2 data. Specifically, we aimed to derive: (i) 5-day revisit fallow/cropping map layers; (ii) key attributes of the fallow and cropping periods (e.g., start, end, duration); (iii) cropping intensity and area. The proposed approach yielded a high and significant overall accuracy, surpassing 92% with substantial balanced accuracy (>0.9) against >3000 fields for individual winter and summer seasons across Australia. In addition, this study's temporal and geographical outputs, encompassing seasonal attributes, cropping intensity and cropping areas, robustly enhanced the understanding of seasonal cropping dynamics and historical shifts in dryland farming practices. Findings derived from this analysis aligned well with extreme climatic events and changes in crop activities adopted in response to such events. Future research will aim to extract key seasonal dynamics attributes influenced by cropping practices, enhancing the conversion of highresolution earth observation data into actionable industry knowledge.
英文关键词	Fallow land; Seasonal cropping dynamics; Turning point detection; Sentinel-2; Google earth engine; Australia; Dryland farming
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001196453500001
来源期刊	REMOTE SENSING OF ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302962
作者单位	Harbin Normal University; University of Queensland; Chinese Academy of Sciences; Aerospace Information Research Institute, CAS; University of Queensland; University of Queensland
推荐引用方式 GB/T 7714	Xie, Zunyi,Zhao, Yan,Jiang, Ruizhu,et al. Seasonal dynamics of fallow and cropping lands in the broadacre cropping region of Australia[J],2024,305.
APA	Xie, Zunyi.,Zhao, Yan.,Jiang, Ruizhu.,Zhang, Miao.,Hammer, Graeme.,...&Potgieter, Andries B..(2024).Seasonal dynamics of fallow and cropping lands in the broadacre cropping region of Australia.REMOTE SENSING OF ENVIRONMENT,305.
MLA	Xie, Zunyi,et al."Seasonal dynamics of fallow and cropping lands in the broadacre cropping region of Australia".REMOTE SENSING OF ENVIRONMENT 305(2024).