Suchergebnisse

Intro -- Contents -- 1 Research Progress of the Grassland Carbon Cycle and Grassland Degradation in China -- 1.1 General Situation of Grassland in China -- 1.2 Related Definitions and Model Formulation -- 1.2.1 Basic Process of Carbon Cycle -- 1.2.2 Observation and Simulation of NPP and Carbon Sinks in Grassland Ecosystem -- 1.3 Literature Review -- 1.3.1 Overview of Grassland Degradation -- 1.3.2 Grassland Degradation Monitoring Method -- 1.3.3 Driving Factors of Grassland Degradation -- 1.3.4 Ecological Restoration Project -- 1.4 Problems in Carbon Sinks Accounting and Grassland Degradation Research -- 1.4.1 Studies on the Driving Mechanism of Grassland NPP in China Are Few -- 1.4.2 Research on the Grassland Carbon Sinks Evaluation in China's National Scale Area Few -- 1.4.3 Lack of Remote Sensing Monitoring and Driving Mechanism Quantitative Assessment of Grassland Degradation in China -- References -- 2 Grassland Coverage Inter-Annual Variations and Its Coupling Relation with Hydrothermal Factors in China -- 2.1 Introduction -- 2.2 Methodology -- 2.2.1 Normalized Difference Vegetation Indices (NDVI) -- 2.2.2 Meteorological Data -- 2.2.3 Land-Cover Products -- 2.2.4 Estimation of Grass Coverage and Its Accuracy Validation -- 2.2.5 Grassland Vegetation Coverage Trend Analysis -- 2.2.6 Correlation Analysis of Grass Coverage and Climate Factors -- 2.3 Implementations and Comparisons -- 2.3.1 Spatial Distribution of Long-Term Mean Grass Coverage -- 2.3.2 Temporal Changes of Grass Coverage in China -- 2.3.3 Correlation Analysis of Grass Coverage and Temperature, Precipitation -- 2.3.4 Comparisons -- 2.4 Conclusions -- References -- 3 Spatial-Temporal Dynamics of Grassland Net Primary Productivity in China and Its Response to Climate Factors -- 3.1 Introduction -- 3.2 Data Source and Processing -- 3.2.1 GIMMS NDVI Data and Processing.