摘要
基于MODIs遥感影像、气象数据和基础地理数据，采用CASA模型估算山东省2000—2005年净初级生产力（NPP），定性与定量相结合分析其时空格局及变化趋势，探讨温度、降水、地表太阳辐射与NPP时空分布的关系。研究表明：山东省NPP年累积碳量平均为252．1g／m^2，NPP总碳量在0．031～0．039Pg／a，占全国总量的0．85％～1．47％；NPP年累积量在波动中上升，增加区域占研究区的78．8％，环渤海地区增势明显；NPP季节变化较大，7—9月上旬形成峰值区，占NPP年累积量的57．1％；NPP空间分布不均，除黄河三角洲为低值区外，其余地区呈现出由四周向中部递减的趋势；相关性分析表明温度和降水是研究区NPP季节分布的主导气象因子，温度在影响研究区NPP地理分布方面占据主导地位。
The relationship of spatial and temporal characteristics of the NPP and related meteorological factors were combinatorially analyzed with qualitative and quantitative methods based on remote sensing images, meteorological factors, geographic data, and NPP estimated from CASA model in Shandong province during 2000 to 2005. Annual NPP of 78.8% Shandong area increased, especially in Bohai region. Average in 6 years was 252.1 g/m^2 , though fluctuated in different year. The total annual NPP, 0. 031--0. 039 PgC, was 0. 85%--1. 47% of China. NPP in different seasons was varied greatly, which in early July to early September was 57.1% of the year. Average annual NPP varied spatially, decreasing from the around to the center of the areas, with exception of that in Yellow River Delta was very lower. Temperature was the key factor in seasonal distribution of NPP, and precipitation acts a main role in geographic distribution of NPP.
出处
《草业科学》
CAS
CSCD
北大核心
2010年第2期8-17,共10页
Pratacultural Science
基金
山东省科技攻关项目(2008GG20006002)
中国科学院知识创新工程重要方向项目(KSCX2-YW-G-028)
山东省软科学基金(2008RKA319)
