全球植被年际尺度动态过程的数值模拟及其评估

被引:8
作者
俞淼
陈海山
孙照渤
Iftikhar Ahmad
机构
[1] 南京信息工程大学气象灾害省部共建教育部重点实验室
关键词
动态过程; LAI; 数值模拟; 模式评估; 年际变化;
D O I
10.13878/j.cnki.dqkxxb.2010.03.001
中图分类号
Q948 [植物生态学和植物地理学];
学科分类号
071012 ; 0713 ;
摘要
动态植被模型(Interactive Canopy Model,ICM)中考虑了生态系统碳氮循环过程,能够描述较短时间尺度上的植被与大气之间相互作用过程。利用21 a的GIMMS卫星观测LAI资料,与ICM模拟结果进行年际变率对比分析,评估模型对植被年际变化的模拟性能。结果表明,ICM能在一定程度上反映植被年际变率的空间分布特征,但模拟的热带部分地区植被的年际变率偏小,除此之外大部分地区模拟的年际变率偏大;模拟能够反映出全球植被年际变化的主要空间分布型,同时低纬度地区植被的时间演变特征要好于高纬度地区;ICM对寒带灌丛、北非稀树大草原、落叶针叶林的年际变化模拟较好,但对中国东部农作物的模拟表现出了明显的周期振荡现象,与实际情况差距较大。
引用
收藏
页码:365 / 374
页数:10
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