arXiv:2601.16347stat.APcs.LG2026-01

用气候数据预测一年后植被状况,助农牧民提前规划。

Long-Term Probabilistic Forecast of Vegetation Conditions Using Climate Attributes in the Four Corners Region

  • 分两阶段建模:先选关键气候因子,再用历史数据预测未来气候
  • 在四角落区实现高分辨率网格上一年期峰值NDVI预测
  • 开源工具优于现有方法,适合农业与生态决策者使用

天气变化会显著影响农作物和牧场状态,进而影响全球个体收入与粮食安全。卫星遥感为区域和全球尺度的植被与气候监测提供了有效手段。年度峰值归一化差异植被指数(NDVI)与作物生长、牧场生物量及植被发育密切相关。尽管已有多种机器学习方法用于短期NDVI预测(如一个月内),但长期预测(如一年后)仍无成熟方案。为此,本文在美西南部四角落地区构建了一个两阶段机器学习模型,用于预测一年后各高分辨率网格的峰值NDVI。第一阶段通过广义并行高斯过程识别关键气候属性(包括降水与最大水汽压亏缺),建立其与NDVI的关系;第二阶段利用至少提前一年的历史数据预测这些气候属性,并输入模型以生成各空间网格的峰值NDVI预测。开发的开源工具在整体与网格级预测上均优于替代方法,可为农民和牧场主提供提前一年的决策支持。

原文摘要 · Abstract (English)

Weather conditions can drastically alter the state of crops and rangelands, and in turn, impact the incomes and food security of individuals worldwide. Satellite-based remote sensing offers an effective way to monitor vegetation and climate variables on regional and global scales. The annual peak Normalized Difference Vegetation Index (NDVI), derived from satellite observations, is closely associated with crop development, rangeland biomass, and vegetation growth. Although various machine learning methods have been developed to forecast NDVI over short time ranges, such as one-month-ahead predictions, long-term forecasting approaches, such as one-year-ahead predictions of vegetation conditions, are not yet available. To fill this gap, we develop a two-phase machine learning model to forecast the one-year-ahead peak NDVI over high-resolution grids, using the Four Corners region of the Southwestern United States as a testbed. In phase one, we identify informative climate attributes, including precipitation and maximum vapor pressure deficit, and develop the generalized parallel Gaussian process that captures the relationship between climate attributes and NDVI. In phase two, we forecast these climate attributes using historical data at least one year before the NDVI prediction month, which then serve as inputs to forecast the peak NDVI at each spatial grid. We developed open-source tools that outperform alternative methods for both gross NDVI and grid-based NDVI one-year forecasts, providing information that can help farmers and ranchers make actionable plans a year in advance.

植被预测气候建模机器学习

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