ABSTRACT

Time-related information in land-change studies is reviewed using case studies in JLUS and LAND. An explicit focus on time has potential for exploring process-based perspectives. We report how time is represented and patterns in pre-analytical choices are detected, identifying practices to enhance the relevance and impact of land-change studies. Results show 40% of the studies use two datasets; the modal timespan and interval between datasets are 10 years; 79% are durations up to 30 years; 73% are changes since 1972. Modal start dates are 1990 and 2000. Dates ending in 0 and 5 are over-represented and lack explicit justification. The prevalence of a ‘two-date approach’ restricts measuring and analyzing change, identifying temporal non-stationarity is precluded, and modelling change pathways and responses to underlying system dynamics are limited. An improved focus on time in dataset choice to developimproved understanding of dynamics and change offers broader insights into land-system functions.

摘要

土地变化研究中与时间有关的信息使用JLUS和LAND中的案例研究进行了回顾。对时间的明确关注具有探索基于过程的观点的潜力。我们报告时间的表示方式以及分析前选择的模式被发现，从而确定可增强土地变化研究的相关性和影响力的实践。结果表明，有40％的研究使用两个数据集。数据集的模式时间跨度和间隔为10年；79％的持续时间不超过30年；73％是自1972年以来的更改。模态开始日期是1990年和2000年。以0和5结尾的日期代表过多，并且缺乏明确的理由。“两个日期的方法”的盛行限制了对变化的测量和分析，排除了确定时间上的非平稳性，并且对变化路径和对底层系统动力学的响应进行建模受到了限制。