SSCI 165Lgw Lecture Notes - Lecture 20: Positive Feedback, Carbon Cycle, Radiative Forcing
Document Summary
Key types of strategies: mitigation reducing emissions (e. g. transport, bldgs. /electricity, land use, solid waste, earth systems engineering/mgmt geological or ocean sequestration, adaptation prep city to manage climate change effects (e. g. rising sea levels, heat emergencies, drought) Carbon cycle: emissions fossil fuels, deforestation (forests not there to sequester co2, changes soil"s a(cid:271)ility to a(cid:271)sor(cid:271) co(cid:1006)(cid:895) Positive feedback loops: more climate change = more forest fire and permafrost (methane trapped inside) melting = releases more ghg: acidification of oceans. Inadequate mitigation policies: minimally effective global agrmts to mitigate climate change. Potential in paris agrmt (2015: some regions have emissions trading systems. Ca ab32 & implementation plan by arb (air resources board: good start as policy models, but (cid:862)leakage(cid:863) (cid:1005) (cid:272)ou(cid:374)try or state (cid:272)a(cid:374) redu(cid:272)e its e(cid:373)issio(cid:374)s, (cid:271)ut they"ll just go elsewhere. Politically difficult: fossil fuels = huge productivity gain in industrial rev, depend on them as fundamental to econ. Global warming potential: specific emissions are assessed for radiative forcing in climate models.
