PARTICIPANTSRESOURCESLakesFreshwatermicrobesWetlandsAtmosphereHumansMethaneWaterHeatOrganic carbonCarbon dioxideImpact +3 of 5. Click for details.Impact +3 of 5. Click for details.Impact +3 of 5. Click for details.Impact +3 of 5. Click for details.Impact +4 of 5. Click for details.40%Impact +4 of 5. Click for details.60%Impact +3 of 5. Click for details.Impact +2 of 5. Click for details.↻ reinforces · weak · 0.2Impact +3 of 5. Click for details.Impact -3 of 5. Click for details.Impact +3 of 5. Click for details.Lakes stratify in summer into a warm surface layer over cold deep water and mix when the surface cools; warming is lengthening stratification: uses WaterLakes stratify in summer into a warm surface layer over cold deep water and mix when the surface cools; warming is lengthening stratification: uses HeatInland waters receive land carbon and respire it: streams and rivers vent about 1.8 Pg C and lakes and reservoirs about 0.32 Pg C of CO2 a year (2.1 Pg C total): uses up Organic carbonuses upInland waters receive land carbon and respire it: streams and rivers vent about 1.8 Pg C and lakes and reservoirs about 0.32 Pg C of CO2 a year (2.1 Pg C total): makes Carbon dioxidemakesOrganic carbon settling in lake and reservoir sediments is buried, globally more than is sequestered on the ocean floor: uses up Organic carbonuses upWhere does the 576 Tg of methane emitted each year come from? (2008-2017, atmospheric inversions): makes MethanemakesNatural sources, dominated by wetlands and other inland waters, about 40%; tropics supply about 65% of all emissions: makes MethanemakesAnthropogenic sources (agriculture, waste, fossil fuels) about 60%: makes MethanemakesLakes differ in mixing regime (how often and when they overturn), and warming is altering these regimes worldwide: uses WaterLakes differ in mixing regime (how often and when they overturn), and warming is altering these regimes worldwide: uses HeatusesWater: usesusesHeat: usesuses upOrganic carbon: uses upmakesCarbon dioxide: makesuses upOrganic carbon: uses upmakesMethane: makesmakesMethane: makesmakesMethane: makesusesWater: usesusesHeat: usesStart: Lakes andwetlands: mixing,carbon burial, CO2 a…STARTStart: Lakes and wetlands: mixing, carbon burial, CO2 and methane emission, eutrophicationEnd: Lakes andwetlands: mixing,carbon burial, CO2 a…ENDEnd: Lakes and wetlands: mixing, carbon burial, CO2 and methane emission, eutrophicationLakes stratify insummer into a warmsurface layer over co…📄2Lakes stratify in summer into a warm surface layer over cold deep water and mix when the surface cools; warming is lengthening stratificationInland waters receiveland carbon and respireit: streams and rive…📄2Inland waters receive land carbon and respire it: streams and rivers vent about 1.8 Pg C and lakes and reservoirs about 0.32 Pg C of CO2 a year (2.1 Pg C total)Organic carbon settlingin lake and reservoirsediments is burie…📄1Organic carbon settling in lake and reservoir sediments is buried, globally more than is sequestered on the ocean floorWhere does the 576 Tgof methane emitted eachyear come fro…📄1Where does the 576 Tg of methane emitted each year come from? (2008-2017, atmospheric inversions)Natural sources,dominated by wetlandsand other inla…📄1Natural sources, dominated by wetlands and other inland waters, about 40%; tropics supply about 65% of all emissionsAnthropogenic sources(agriculture, waste,fossil fuels) about 60%📄1Anthropogenic sources (agriculture, waste, fossil fuels) about 60%Nutrient loading frompeople driveseutrophication: hypox…📄1Nutrient loading from people drives eutrophication: hypoxia recorded in 365 lake sediment cores began spreading before 1900, 70 years ahead of coastal hypoxia, Lakes differ in mixingregime (how often andwhen they overturn…📄1Lakes differ in mixing regime (how often and when they overturn), and warming is altering these regimes worldwide
PositiveNegativeLoops backOpen questionThickness = size of impact · % = share of a fork · drag to pan · ctrl+scroll to zoom · ↘ walks into a subprocess