中国5种暖温带木本植物叶全变色期数据集(1963–2015)

Autumn Phenological Grid Dataset of Five Deciduous Broad-leaved Woody Plants in the Warm Temperate Zone of China(1963–2015)

植物秋季物候受温度、湿度、光照等多种环境因素的共同影响,其发生机制和变化过程存在很大不确定性,在全球变化及资源环境领域研究中至关重要。本文利用中国物候观测网1963–2015年白蜡、垂柳、刺槐、榆树和杏树等5种木本植物的叶全变色期数据,构建多元回归(Multivariate Regression,MR)、温度光周期(Temperature-photoperiod,TP)和春季影响秋季(Spring-influenced Autumn,SIA)三种秋季物候模型,经模拟和尺度拓展研制了过去50年各物种的叶全变色期0.5°×0.5°格网数据。数据交叉验证结果表明叶全变色期的平均模拟误差约为10–18天。本数据集是表征中国近50年秋季物候时空格局及变化特征的基础数据,数据集由头文件、物种物候期和物种分布范围三部分组成,包括3个数据文件夹共计541个数据文件,数据存储为.txt、GEOTIFF和ArcGIS ASCII格式,数据量压缩前26.8 MB(压缩后4.86 MB)。

Plant autumn phenology is affected by many environmental factors,such as temperature,water,and daylight.Because of the sensitivity to environmental factors,changes in the timing and distribution of autumn phenology is more complicated and may be important indicators of global changes.In this paper,the leaf coloring date(LCD)of five woody plants,Fraxinus chinensis Roxb.(Oleaceae),Salix babylonica L.(Salicaceae),Robinia pseudoacacia L.(Leguminosae),Ulmus pumila L.(Ulmaceae Mirb.),and Armeniaca vulgaris Lam.(Rosaceae),from 1963 to 2015 was obtained from the Chinese Phenological Observation Network and used to establish and compare three LCD models(multiple regression,temperature–photoperiod,and spring-influenced autumn).The 0.5°×0.5°LCD grid data of the five species from 1963 to 2015 were developed by simulation and scale expansion.The cross validation results showed that the average simulation error of the LCD was approximately 10–18 days.The autumn phenological grid dataset of China is the basic data representing the spatial–temporal pattern and changes in autumn phenology in China over the last 50 years.The dataset includes three parts:header file,phenophase,and spatial distribution,which consist of 541 data files in three data folders.The data is archieved in.txt,GEOTIFF,and ARCGIS ASCII formats.The data size is 26.8 MB(4.86 MB after compression).