Thanks Greg.
The relevance of the net zero heating model to CDR is about policy. IPCC wrongly assumes that action to remove carbon warming forcing could be enough to stabilise the climate. The exclusion of albedo measures from serious COP discussion has created a false over-estimation of the potential contribution of CDR and emission reduction to the overall climate priority agenda. Efforts into CDR are misplaced where they support the current IPCC consensus that sees no role for albedo enhancement in climate policy. The fact that even massive CDR cannot be enough to prevent dangerous tipping points ought to be a primary concern for CDR advocates. The current policy goal of net zero emissions lacks a critical engineering path in view of the swamping problem of accelerating feedbacks. So my call to the CDR community is to join in challenging the IPCC consensus that action on carbon is the only climate priority, and instead help to develop an integrated policy that recognises the immediate need for direct climate cooling. Reversing acidification is essential, but it can’t be used as an excuse to avoid the need for a policy that integrates action on carbon with action to brighten the planet. Regards Robert Tulip From: Greg Rau <[email protected]> Sent: Friday, 17 March 2023 8:21 AM To: [email protected] Cc: Planetary Restoration <[email protected]>; NOAC <[email protected]>; healthy-planet-action-coalition <[email protected]>; geoengineering <[email protected]>; Carbon Dioxide Removal <[email protected]>; Healthy Climate Alliance <[email protected]> Subject: Re: [CDR] RE: A Climate Model: Net Zero Heating Robert, Are you then suggesting that efforts into CDR are misplaced? True, CDR isn't going to singlehandedly solve the climate problem, but it and emissions reduction are the only things we've got to hasten the solution to excess CO2. This includes ending ocean acidification that SRM presumably can't touch. I can't speak for the entire CDR list, but many of us do support SRM research, a theme ably covered by the other lists you posted to but not the CDR list. Regards, Greg Moderator On Wed, Mar 15, 2023 at 11:01 AM <[email protected] <mailto:[email protected]> > wrote: The policy context for carbon dioxide removal includes its effect on radiative forcing. RF management is critical to the goal of a stable and liveable climate. CDR can only have climate effect when integrated into a program of albedo enhancement to cut radiative forcing. The need to focus on RF is unpalatable for CDR advocates who prefer to ignore the problems of global warming. And yet it seems inescapable that failure to enhance albedo will trigger tipping points that will swamp potential climate benefits of CDR. A ten foot levee is no good against a twenty foot flood. But that is the result of a climate policy fixated on carbon rather than albedo. RT From: Michael Hayes <[email protected] <mailto:[email protected]> > Sent: Wednesday, 15 March 2023 12:03 PM To: [email protected] <mailto:[email protected]> Cc: Planetary Restoration <[email protected] <mailto:[email protected]> >; NOAC <[email protected] <mailto:[email protected]> >; healthy-planet-action-coalition <[email protected] <mailto:[email protected]> >; geoengineering <[email protected] <mailto:[email protected]> >; Carbon Dioxide Removal <[email protected] <mailto:[email protected]> >; Healthy Climate Alliance <[email protected] <mailto:[email protected]> > Subject: Re: [prag] Re: [CDR] A Climate Model: Net Zero Heating Suggest whatever you wish, I'll object to any non CDR post being posted in the CDR list. On Tue, Mar 14, 2023, 2:56 PM <[email protected] <mailto:[email protected]> > wrote: With all due respect Michael Hayes, your failure to see the relevance to CDR ignores the global warming context of CDR. The thread quantifies the planetary heating and cooling balance based on published research documenting factors to date. It shows the total contribution needed from carbon dioxide removal and other greenhouse gas removal as well as cooling factors to achieve net zero heating. It also explains prioritisation, showing that CDR has to operate over a slower time frame than albedo enhancement. I expect that is what you object to, but it is a simple scientific observation. To quantify Net Zero Heating is directly relevant to CDR by placing CDR within the context of total radiative forcing. That is why I posted it to the CDR Group. Are you a moderator at the CDR Group? If not, can I suggest you leave list moderation to the moderators? Robert Tulip From: [email protected] <mailto:[email protected]> <[email protected] <mailto:[email protected]> > On Behalf Of Michael Hayes Sent: Wednesday, 15 March 2023 7:46 AM To: [email protected] <mailto:[email protected]> Cc: Planetary Restoration <[email protected] <mailto:[email protected]> >; NOAC <[email protected] <mailto:[email protected]> >; healthy-planet-action-coalition <[email protected] <mailto:[email protected]> >; geoengineering <[email protected] <mailto:[email protected]> >; Carbon Dioxide Removal <[email protected] <mailto:[email protected]> >; Healthy Climate Alliance <[email protected] <mailto:[email protected]> > Subject: [prag] Re: [CDR] A Climate Model: Net Zero Heating There is nothing within this thread that is addressed directly to any aspect of the extensive list of STEM, policy, and/or socioeconomics level issues within the recognized CDR space. On Mon, Mar 13, 2023, 8:37 PM <[email protected] <mailto:[email protected]> > wrote: Stabilising the climate requires equality of positive and negative radiative forcing to achieve net zero heating. Here is a simple model of how climate stability could be achieved over coming decades and centuries using albedo enhancement and greenhouse gas removal. Stratospheric Aerosol Injection, Marine Cloud Brightening and other cooling methods can balance CO2 and CH4 and other warming factors. The left half of the diagram is from An Imperative To Monitor Earth’s Energy Imbalance, published in 2016 in Nature Climate Change. The right half extrapolates radiative forcing to achieve and sustain net zero heating from 2060. The bands are roughly drawn. It is possible that the main cooling work shown as SAI could be partly replaced by other methods. Regards Robert Tulip -- You received this message because you are subscribed to the Google Groups "Carbon Dioxide Removal" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . To view this discussion on the web visit https://groups.google.com/d/msgid/CarbonDioxideRemoval/09aa01d95626%243c8cb2a0%24b5a617e0%24%40rtulip.net <https://groups.google.com/d/msgid/CarbonDioxideRemoval/09aa01d95626%243c8cb2a0%24b5a617e0%24%40rtulip.net?utm_medium=email&utm_source=footer> . -- You received this message because you are subscribed to the Google Groups "Planetary Restoration" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . To view this discussion on the web visit https://groups.google.com/d/msgid/planetary-restoration/CABjtO1dvPpMFJDx_jcY6kX2F7KvEqDa%2BiojL9dokLYVDAx441A%40mail.gmail.com <https://groups.google.com/d/msgid/planetary-restoration/CABjtO1dvPpMFJDx_jcY6kX2F7KvEqDa%2BiojL9dokLYVDAx441A%40mail.gmail.com?utm_medium=email&utm_source=footer> . -- You received this message because you are subscribed to the Google Groups "Carbon Dioxide Removal" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] <mailto:[email protected]> . To view this discussion on the web visit https://groups.google.com/d/msgid/CarbonDioxideRemoval/020201d95768%241e855490%245b8ffdb0%24%40rtulip.net <https://groups.google.com/d/msgid/CarbonDioxideRemoval/020201d95768%241e855490%245b8ffdb0%24%40rtulip.net?utm_medium=email&utm_source=footer> . -- Greg H. Rau, Ph.D. Senior Research Scientist Institute of Marine Sciences Univer. California, Santa Cruz https://www.researchgate.net/profile/Greg_Rau Co-founder and manager, the Carbon Dioxide Removal Google group <https://groups.google.com/u/1/g/CarbonDioxideRemoval> Co-founder and CTO, Planetary Technologies, Inc. <https://www.planetarytech.com> 510 582 5578 510 363 1519 c -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/03a301d95864%24751dc740%245f5955c0%24%40rtulip.net.
