The below paper would appear to be instructive on this debate ; it may not end as it begins
LETTER • OPEN ACCESS • IOPSELECT <http://iopscience.iop.org/collections?collection_type=SELECT> Atmospheric consequences of disruption of the ocean thermocline Lester Kwiatkowski, Katharine L Ricke and Ken Caldeira Published 19 March 2015 • © 2015 IOP Publishing Ltd Environmental Research Letters <http://iopscience.iop.org/journal/1748-9326> , Volume 10 <http://iopscience.iop.org/volume/1748-9326/10>,Number 3 <http://iopscience.iop.org/issue/1748-9326/10/3> Article PDF <http://iopscience.iop.org/article/10.1088/1748-9326/10/3/034016/pdf> - 5398 Total downloads 119 Video abstract views - Cited by 1 articles <http://iopscience.iop.org/article/10.1088/1748-9326/10/3/034016;jsessionid=D9BB39BD359369457DD8A62AE8F9C92B.ip-10-40-1-105#citations> - [image: Article has an altmetric score of 75] <https://www.altmetric.com/details.php?domain=iopscience.iop.org&citation_id=3812746> - Turn on MathJax <http://iopscience.iop.org/article/10.1088/1748-9326/10/3/034016;jsessionid=D9BB39BD359369457DD8A62AE8F9C92B.ip-10-40-1-105#> - Share this article <?subject=Atmospheric%20consequences%20of%20disruption%20of%20the%20ocean%20thermocline&body=Atmospheric%20consequences%20of%20disruption%20of%20the%20ocean%20thermocline%20-%20https://doi.org/10.1088/1748-9326/10/3/034016> <http://www.facebook.com/sharer.php?u=https://doi.org/10.1088/1748-9326/10/3/034016> <http://twitter.com/share?url=https://doi.org/10.1088/1748-9326/10/3/034016&text=Atmospheric%20consequences%20of%20disruption%20of%20the%20ocean%20thermocline&via=IOPscience> <https://plus.google.com/share?url=https://doi.org/10.1088/1748-9326/10/3/034016> <http://www.citeulike.org/posturl?url=https://doi.org/10.1088/1748-9326/10/3/034016> <http://www.mendeley.com/import/?doi=10.1088/1748-9326/10/3/034016> Article information <http://iopscience.iop.org/article/10.1088/1748-9326/10/3/034016;jsessionid=D9BB39BD359369457DD8A62AE8F9C92B.ip-10-40-1-105#> Abstract Download video <http://iopscience.iop.org/1748-9326/10/3/034016/video/abstract> Transcript <http://iopscience.iop.org/1748-9326/10/3/034016/media/abstract-transcript-510722-va.txt> View all Environ. Res. Lett. video abstracts <http://iopscience.iop.org/1748-9326/videoabstracts> Technologies utilizing vertical ocean pipes have been proposed as a means to avoid global warming, either by providing a source of clean energy, increasing ocean carbon uptake, or storing thermal energy in the deep ocean. However, increased vertical transport of water has the capacity to drastically alter the ocean thermocline. To help bound potential climate consequences of these activities, we perform a set of simulations involving idealized disruption of the ocean thermocline by greatly increasing vertical mixing in the upper ocean. We use an Earth System Model (ESM) to evaluate the likely thermal and hydrological response of the atmosphere to this scenario. In our model, increased vertical transport in the upper ocean decreases upward shortwave and longwave radiation at the top-of-the-atmosphere due primarily to loss of clouds and sea-ice over the ocean. This extreme scenario causes an effective radiative forcing of ≈15.5–15.9 W m−2, with simulations behaving on multi-decadal time scales as if they are approaching an equilibrium temperature ≈8.6–8.8 °C higher than controls. Within a century, this produces higher global mean surface temperatures than would have occurred in the absence of increased vertical ocean transport. In our simulations, disruption of the thermocline strongly cools the lower atmosphere over the ocean, resulting in high pressure anomalies. The greater land-sea pressure contrast is found to increase water vapour transport from ocean to land in the lower atmosphere and therefore increase global mean precipitation minus evaporation (P–E) over land; however, many high latitude regions and some low latitude regions experience decreased P–E. Any real implementation of ocean pipe technologies would damage the thermal structure of the ocean to a lesser extent than simulated here; nevertheless, our simulations indicate the likely sign and character of unintended atmospheric consequences of such ocean technologies. Prolonged application of ocean pipe technologies, rather than avoiding global warming, could exacerbate long-term warming of the climate system. On 4 May 2017 18:16, "Andrew Lockley" <[email protected]> wrote: > ---------- Forwarded message ---------- > From: "lou del bello" <[email protected]> > Date: 4 May 2017 16:51 > Subject: Hi - New Scientist press enquiry > To: "Andrew Lockley" <[email protected]> > Cc: > > Hi Andrew > > I understand you manage the geoengineering list so I thought before > posting I would just write you first, because my query is not specifically > about geoengineering but might be of interest to some of the list's members. > > I am writing a story for the New Scientist which will cover the attached > paper. > > The paper focuses on an Arctic site characterised by high methane flux > from the seafloor. It observes that the methane, despite being a potent > greenhouse gas, has the effect to take up CO2 at a higher rate than the > surrounding waters, even offsetting the warming potential of the methane > itself. This effect, according to the scientists, turns such sites into > "carbon sinks". > > Can you think of someone who might be qualified and interested in > commenting on the story? Ideally between tonight and tomorrow, i just need > a quick Skype/phone chat. > > > Many thanks! > > > > Lou > > -- > *Lou Del Bello* > > *Mobile UK +44 (0)7900632250 <+44%207900%20632250>* > *Mobile Kenya +254 (0)14190244 * > > Multimedia journalist > > @loudelbello > > > > > > > -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
