埃德·希尔教授_基于海洋的二氧化碳去除.pdf

1、OCEAN-BASED CARBON DIOXIDE REMOVALPROFESSOR ED HILL CBEGlobal ocean observations for equitable knowledge-based decision making“Deliberate human activities using technologies,practices and approaches-that remove and durably store carbon dioxide from the atmosphere”“Storage can be vegetation on land,s

2、oils,geological formations,manufactured products or in the ocean and coastal marine environments”IPCC 6thAssessment Working Group III ReportMarine-based CDR(mCDR)whenCO removal takes place in a marine environment(not just storage in marine environment)WHAT IS CARBON DIOXIDE REMOVAL(CDR)?SOME BIG NUM

3、BERSFor Net Zero:Remove 5-10 billion tonnes CO2 per year?For Clean up:Remove 950 Gt over 100 years,say=10Gt/year How much feasible by enhancing ocean uptake?What first attracted you to the trillion-dollar CDR industry?BIG NUMBERS(continued)Carbon Price:$100/t CO2Remove:10Gt/yearAnnual value:$1,000,0

4、00,000,000WHY THE OCEAN?70%EARTHS SURFACE IN CONTACT WITH ATMOSPHEREUK land area242,495 km20.05%UK EEZ773,676 km20.15%x3UK+OT EEZ6,805,586 km21.33%x28International waters255,050,250 km250%x1050%indicates relative proportion of Earths surface.x shows increase relative to UK land area.Maps and data fr

5、om Wikipedia.What parts of the ocean are most suitable for different techniques?WHY THE OCEAN?80%OF EARTHS MOBILE CARBON LONG DURATION 100S-1000S YEARS Marine(80%)Non MarineMarine(c 25%)What is the ultimate aim for mCDR?Ocean takes up 10Gt/y enhance it by 1Gt/y(10%),10Gt/y(100%),more?COMPLEX OCEAN-A

6、TMOSPHERE INTERACTIONS AT GLOBAL SCALEMEASUREMENT OF LOCAL CO2 REMOVAL DOES NOT TELL WHOLE STORYAdd CO2Remove CO2OceanOceanAnd are we competing with natural ocean CO2 uptake reducing?SOME MARINE BASED CDR TECHNIQUES Boettcher et al.(2021)What is their efficacy,impact,permanence,scalability?OCEAN CDR