Relationship of regional net primary productivity and related meteorological factors
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.