Aerosols ‘risky’ way to tackle global warm­ing

The Press and Journal (Moray) - - NEWS - BY JOHN VON RAD­OWITZ

Mim­ick­ing the ef­fect of vol­ca­noes to curb global warm­ing im­pacts is a “highly risky” strat­egy that could back­fire dis­as­trously, a study sug­gests.

Cli­mate ex­perts con­ducted com­puter sim­u­la­tions of what would hap­pen if mil­lions of droplet par­ti­cles, or aerosols, were in­jected into the at­mos­phere to block the sun’s rays.

They found adopt­ing the geo­engi­neer­ing ap­proach in the north­ern hemi­sphere would re­duce trop­i­cal cy­clone ac­tiv­ity re­spon­si­ble for dev­as­tat­ing storms such as Hur­ri­cane Ka­t­rina.

But at the same time, it risked trig­ger­ing wide­spread drought in the Sa- hel, the re­gion of Africa just south of the Sa­hara desert.

Aerosols in­jected into the sky over the south­ern hemi­sphere would po­ten­tially boost North At­lantic trop­i­cal cy­clone ac­tiv­ity, in­creas­ing the like­li­hood of hur­ri­canes.

The ap­proach, based on the ef­fects of vol­canic erup­tions which nat­u­rally fire aerosols into the at­mos­phere, has been pro­moted by some ex­perts as a “quick fix” to re­duce the rate of global warm­ing.

Cli­mate sci­en­tist Dr An­thony Jones, from the Univer­sity of Ex­eter, who led the re­search, said: “Our re­sults con­firm that re­gional so­lar geo­engi­neer­ing is a highly risky strat­egy.”

Re­duc­ing global warm­ing is the fo­cus of re­search

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