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Table 2 Correlation coefficient between calculated NPP by random forest and MODIS NPP in global different types of land

From: The global impact factors of net primary production in different land cover types from 2005 to 2011

Class year

Forests

Shrub lands

Savannas

Grasslands

Permanent wetlands

Croplands and built-up area

Snow and ice

Barren and sparsely vegetated

2005

0.991651

0.983342

0.988376

0.991347

0.984758

0.987507

0.991462

0.987169

2010

0.990842

0.982202

0.987927

0.991595

0.983005

0.988258

0.992126

0.984349