Science Innovations: Wastewater test could provide early warning of COVID-19  |  Parent Interventions: Infants prefer individuals who achieve their goals efficiently  |  Policy Indications: China's control measures may have prevented 700,000 COVID-19 cases  |  National Edu News: SEZs busy in manufacturing drugs, pharmaceuticals & hospital devices  |  Best Practices: Covid-19: Indian Railways to modify 20000 coaches for isolation needs  |  Leadership Instincts: AYUSH Ministry initiates scientific & evidence-based solutions to fight Covid-19  |  Health Monitor: Covid-19: AYUSH recommends Ayurveda’s immunity boosting measures for self care  |  Policy Indications: Office of Principal Scientific Adviser issues manual on homemade masks  |  Policy Indications: Apprentices will continue to get their full stipend during COVID-19 Lockdown  |  National Edu News: Stranded in India portal to help foreign tourists stuck in India   |  Finance: Premium payment period extended upto 30th April 2020  |  National Edu News: Doordarshan set to bring back Golden Era of television  |  Technology Inceptions: Startup in Scitech Park to disinfect Maharashtra hospitals in Covid 19 fight  |  Policy Indications: Lessons from the Spanish flu: Early restrictions lowered disease, mortality rate  |  Science Innovations: Scientists predict the size of plastics animals can eat  |  
November 15, 2017 Wednesday 03:54:26 PM IST

Cooling Earth artificially is disastrous

Science Innovations

London: Proposals to counter the effects of global warming by imitating volcanic eruptions could lead to natural disasters in different parts of the world, warn scientists.

Geoengineering - the intentional manipulation of the climate to counter the effect of global warming by injecting aerosols artificially into the atmosphere - has been mooted as a potential way to deal with climate change.

But such measures could have a devastating effect on regions prone to either tumultuous storms or prolonged drought, according to the study published in the journal Nature Communications. Targeting geoengineering in one hemisphere could have a severely detrimental impact for the other, the study said. 

"Our results confirm that regional solar geoengineering is a highly risky strategy which could simultaneously benefit one region to the detriment of another," said study lead author Anthony Jones from University of Exeter in Britain. "It is vital that policymakers take solar geoengineering seriously and act swiftly to install effective regulation," Jones said. 


While injections of aerosols in the northern hemisphere would reduce tropical cyclone activity - responsible for such recent phenomena including Hurricane Katrina - it would at the same time lead to increased likelihood for drought in the Sahel, the area of sub-Saharan Africa just south of the Sahara desert, the study said. 

The findings suggest that policymakers worldwide must strictly regulate any large scale unilateral geoengineering programmes in the future to prevent inducing natural disasters in different parts of the world.

The research centred on the impact solar geoengineering methods may have on the frequency of tropical cyclones. The controversial approach, known as stratospheric aerosol injection, is designed to effectively cool the Earth's surface by reflecting some sunlight before it reaches the surface.

The proposals mimic the aftermath of volcanic eruptions, when aerosols are naturally injected into the atmosphere. In the study, the researchers used sophisticated simulations to investigate the effect of hemispheric stratospheric aerosol injection on North Atlantic tropical cyclone frequency.


They found that injections of aerosols in the northern hemisphere would decrease North Atlantic tropical cyclone frequency, while injections contained to the southern hemisphere may potentially enhance it.

"Our results are likely to be generally applicable owing to the large body of evidence that if a climate model is forced by cooling one hemisphere, the ITCZ (Inter-Tropical Convergence Zone) and associated precipitation will migrate towards the opposite hemisphere," the study said. 

"This is because the cross-equatorial energy transport adjusts to transport energy away from the warmer hemisphere while the transport of moisture at lower levels in the atmosphere acts in the opposite direction," it added.


Comments