- Global photosynthesis and respiration are dependent on temperature.
- Rainforests normally act as a carbon sink.
- With the rising temperature, the ecosystem’s carbon sink strength may be at risk.
- Land carbon sink currently mitigates about 30 percent of carbon emission caused by humans.
- However, it is unclear whether this ecosystem’s carbon sink mitigation will continue.
- Researchers monitored and observed the effect of temperature to global land carbon uptake.
- Data show that the mean temperature of the warmest quarter overtook the thermal maximum for photosynthesis during the past 10 years.
- Respiration rates continue to rise at higher temperature.
- However, the rates of photosynthesis continue to decline.
- Without interventions, land carbon sink strength is expected to decline by almost 50 percent as early as 2040.
Source:
Science Advances 13 Jan 2021: Vol. 7, no. 3, eaay1052 DOI: 10.1126/sciadv.aay1052 https://advances.sciencemag.org/content/7/3/eaay1052
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