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Understanding carbon sequestration trends using model and satellite data under different ecosystems in India.
Smrati Gupta1, Pramit Kumar Deb Burman2, Yogesh K Tiwari2
1Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India; Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India.
The Science of the Total Environment
|August 18, 2023
Summary
This study analyzed carbon sequestration variability across four diverse Indian biosphere regions. Results show an increasing trend in Gross Primary Productivity (GPP), with the Western Ghats and Western Himalayas exhibiting the highest rates of increase.
Area of Science:
- Ecological Sciences
- Climate Change Research
- Remote Sensing
Background:
- Carbon sequestration is vital for climate regulation, with vegetation playing a key role.
- Understanding regional variability in carbon sequestration is crucial for effective climate change mitigation strategies.
- India's diverse ecosystems present a unique case study for analyzing vegetation response to climatic shifts.
Purpose of the Study:
- To investigate the variability of carbon sequestration across four distinct Indian biosphere regions.
- To analyze the relationship between climatic parameters, vegetation indices, and Gross Primary Productivity (GPP).
- To assess the impact of changing climatic conditions on vegetation health and carbon uptake over two decades.
Main Methods:
- Utilized FLUXCOM GPP data (2001-2019) and satellite-derived vegetation indices (NDVI, EVI, LAI).
- Analyzed meteorological data including surface temperature, rainfall, soil water, and Vapor Pressure Deficit (VPD).
- Employed statistical analysis to determine trends and correlations between climatic variables and vegetation productivity across selected regions.
Main Results:
- Leaf Area Index (LAI) showed a stronger correlation with GPP than EVI and NDVI across different seasons.
- Gross Primary Productivity (GPP) exhibited a positive trend in all studied regions, indicating increased carbon uptake.
- The Western Ghats (WG) and Western Himalayan region (WHNI) demonstrated significant high rates of GPP increase (6.44 and 5.36 gCm⁻²y⁻¹, respectively).
Conclusions:
- Vegetation in the studied Indian biosphere regions shows a positive response to changing climatic conditions, with increasing carbon sequestration.
- Regional variations in flora and climate significantly influence the magnitude of Gross Primary Productivity (GPP).
- Long-term monitoring of vegetation indices and GPP is essential for understanding climate change impacts and informing conservation efforts.
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