In a recently published paper, researchers use “an LCA approach to calculate the Long-Lasting #CarbonSequestration (LLCS) of #seaweed, which can be understood as the difference between #CarbonFixation & released C throughout the life cycle of seaweed.”
🧵1/9
Using kelp (Laminaria japonica) as an example of seaweed, the present study “validates the procedure of calculating the LLCS of seaweed throughout its whole life cycle in Ailian Bay from nursery to processing into #biochar (fertilizer) as the final product.” 2/9
The results showed that “the #CarbonSequestration (full life cycle) of kelp in Ailian Bay was 97.73g C /m2/year.” 3/9
“#Biomass carbon accounts for approximately 86.15% of the total value (982.53 g C/m2/year) of carbon absorption source of #kelp in Ailian Bay, with the remaining 13.85% consisting of RDOC and sedimentary carbon.” 4/9
“The #CarbonFootprint of the kelp in Ailain Bay is -1146.8 tons of CO2 per year, and the negative value indicates that the #kelp in Ailian Bay can contribute 1146.8 tons of #CarbonSink per year.”
5/9
Moreover, scientists in this study calculated the amount of #biomass carbon that was #sequestrated by seaweed production in China from 2010 to 2020.
6/9
“If all seaweed #biomass carbon is permanently #sequestered the results of this study suggest that about 250,000 tons of CO2 could be fixed by Chinese seaweed
during this decade, which could reach 0.2% of China's peak carbon.”
7/9
Accordingly, the present research concludes that “the mass production of #seaweed can be utilized as an efficient method to #sequestrate carbon and a feasible method for evaluating the effect of kelp farms on climate change.”
8/9
🔗 Link to the paper entitled “Carbon sequestration assessment and analysis in the whole life cycle of seaweed” here ⬇️ iopscience.iop.org/article/10.108…
🚨New Viewpoint published in Frontiers that responds to Siegert et al.’s paper.
While Siegert et al. warn against polar #geoengineering, Moore et al. argue for a compassionate harm-reduction paradigm, keeping geoengineering research open alongside decarbonization.
Their case: interventions are risky, may not work, and could distract from the essential task which is deep decarbonization.frontiersin.org/journals/scien…
3/ Moore et al. [] reply that this “consequences-based paradigm” (raising alarms to spur action), has dominated climate science for 50 years.
🚨New Nature Geoscience study shows that blooms of Phaeocystis antarctica (microalgae) in the Southern Ocean ~14,000 yrs ago massively drew down CO₂, stabilizing climate. Their decline today could have global consequences.
#CarbonSink #CarbonDrawdown
Details🧵1/9
2/ Microalgae are pivotal in the Southern Ocean carbon cycle.
A new study from the Alfred Wegener Institute (AWI) reveals that during the Antarctic Cold Reversal (14.7–12.7k yrs BP), algal blooms slowed the rise of atmospheric CO₂.
3/ At the end of the last ice age, the Antarctic Cold Reversal brought vast winter sea ice followed by strong spring melt.
These unique conditions fueled Phaeocystis antarctica blooms, exceptionally efficient at capturing and exporting carbon.
🚨Researchers at the KAIST and the @MIT have developed a new fiber-based material that can capture CO2 directly from the air using only small amounts of electricity, potentially lowering the barriers to large-scale deployment of direct air capture (#DAC) technology.
DETAILS🧵1/8
2/ DAC systems, which remove CO2 directly from ambient air, have long been hindered by their high energy requirements.
With atm CO₂ concentrations at less than 400ppm, vast volumes of air must be processed, typically requiring large amounts of heat.
3/ The joint team, led by Professor Ko Dong-yeon of KAIST & Professor T. Alan Hatton of MIT, overcame this limitation by designing an electrically conductive fiber adsorbent (ethylenediamine EDA-Y zeolite/cellulose acetate (CA) fiber) that heats itself through Joule heating.
🚨In a new study published in @OneEarth_CP, researchers reveal that human land activities have stripped away roughly 24% of terrestrial carbon stocks (equivalent to 344 billion metric tons of C), underscoring an urgent need to reframe land-use & climate policy.
Details🧵1/10
2/ Plants + soils store more carbon than the atmosphere + all fossil reserves combined.
But farming, grazing, and forest use have stripped away this natural shield, turning land from a carbon bank into a carbon source.
3/ Researchers call this loss the terrestrial carbon deficit - the gap between what ecosystems could hold (‘potential’) vs. what they actually hold (‘actual’).