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intherockymountainsofcentralcolorado

theforcesofnaturecreatealandscapeofalpinelakes

highaltitudepondsteamywithlifeandmountainmetals

burstingwithwildflowers

itisadmitsbeautitifulilildlowerfields

thatonescientisthasalreadyfoundalarming

evidenceaboutthepotentialimpactofglobalwarming

johnhart

aprofessorofenvironmentalscienceattheuniversityofcaliforniaberkeley

runsanexperimenttodeterminewhatwouldhappen

ifthetemperaturewasjustthreedegreeswarmerhereyearroundliketheforecaasttedeffectofglobalwarming

thatheatingeffectwillinducedramaticeffectsonthesesubelpanmemedowscausinglossofoftheplants

thatweespeciallyvalueheretheflowerinplants

johnhearthascomehereeachsummersincetheoneandseventiesexaminingfactorsaffectinglifeinthisfragileecosystemisheatingitsactuallyquitesubtlewewerenotheatingalotitsonlyafewdegrees

butitscausingthefloweringplantstoproducefewerflowersintogrow

lessabundantly

hissetupisrelativelysimplelowpowerelectricheaerssuspendedaboveamountainmeawheatthegroundandtheplantlifebeneaththreedegreeswarmerthanasurroundingarea

theheatersareautomaticallyandpreciselycontrolledtheyvebeenonconstantlydayandnight

winter

spring

summerandfall

sincenineteen

nineteen

ninety

oneinhisglobalwarmingexperiment

hesuspendedheatersinagridppatterncrecreateheatedplotsthanunheatedlotsbackandforth

sohecanjudgetheeffectsidebyside

thedifferencethreedegreesofseparationmakesandflowersandsagebrushiseasytoseesuacsesoftheplantintheunheatednaturalarea

sagebrushshisasourceofmoistureforanarmyofthursdayinsects

theykeepsagebrushundercontrol

sotheyhavelittlemouthpiecesthatcansucrawayatthenutrient

butjustafewfeetaway

sagebrushundertheheatergrowsfarbetterwithfewerbugs

suchmorerapidlyfoundthattheheatingiscausing

perfusedgrowthofthesagebrush

wellthatsgoodforthesagebrush

itsnotgoodforitsplantneighbors

flowersfeeltheeffecttooinnaturalareas

flowersgrowthickastheyalwaysdohere

butafewfeetaway

whereitsthreedegrees

warmerflowersarenotasabundant

themeadowssitoflookinglushandstrewnwithflowersarenowactuallyratheraroit

ifglobalwarmingourlongtermclimatechangedoesincreasetheyeararoundtemperatureherejustafewdegrees

johnheartpredictsindecadestocome

flowerscouldbecrowdedoutbysagebrush

globalwarmingismorethanjustanecologicalcataastropy

itwillbeahumancatastrophe

andallofitsdimensions