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New Ocean Heat Content Histories

23 Jan 2019 by group

Guest commentary from Laure Zanna (U. Oxford) and G. Jake Gebbie (WHOI)

Two recent papers, Zanna et al. (2019) (hereafter ZKGIH19) and Gebbie & Huybers (2019) (hereafter GH19), independently reconstructed ocean heat content (OHC) changes prior to the instrumentally-based records (which start ~1950). The goals (and methodologies) of the two papers were quite different – ZKGIH19 investigated regional patterns of ocean warming and thermal sea level rise, while GH19 analyzed the long-term memory of the deep ocean – but they both touch on the same key questions of climate forcing and response.

[Read more…] about New Ocean Heat Content Histories

References

  1. L. Zanna, S. Khatiwala, J.M. Gregory, J. Ison, and P. Heimbach, "Global reconstruction of historical ocean heat storage and transport", Proceedings of the National Academy of Sciences, vol. 116, pp. 1126-1131, 2019. http://dx.doi.org/10.1073/pnas.1808838115
  2. G. Gebbie, and P. Huybers, "The Little Ice Age and 20th-century deep Pacific cooling", Science, vol. 363, pp. 70-74, 2019. http://dx.doi.org/10.1126/science.aar8413

Filed Under: Climate modelling, Climate Science, Greenhouse gases, Instrumental Record, Oceans, Paleoclimate

The Climate Scientists are Alright

22 Jan 2019 by group

Guest commentary from Eric Guilyardi (IPSL) and Valérie Masson-Delmotte (IPSL/IPCC)

[This is a translation of an article in Le Monde (Jan 11).]

In recent weeks in France, there has been a profusion of articles about the “climate scientist blues” (Le Monde 21/Dec, JDD 9/Dec, France Info 26/Sep), which has apparently affecting them “scientifically”. This follows a spate of similar articles in the US and Australian media (Esquire, 2015; The Monthly, 2018; Sierra Club Magazine, 2018). But what is the point of knowing the mood of scientists, or whether so-and-so is optimistic or pessimistic?

[Read more…] about The Climate Scientists are Alright

Filed Under: Climate Science, Scientific practice, Solutions

Unforced Variations: Jan 2019

1 Jan 2019 by group

This year’s first open thread on climate science topics. Usual rules apply – and let’s make a particular effort to stay substantive and not devolve into empty bickering (you still have Facebook for that).

Any expectations or predictions for climate science in 2019?

Filed Under: Climate Science, Open thread

Scientists: Resolve to Protect Yourself from Harassment in 2019

6 Dec 2018 by group

Guest commentary by Lauren Kurtz

The Climate Science Legal Defense Fund (CSLDF) protects the scientific endeavor from anti-science attacks. Since our founding in 2011, we’ve assisted hundreds of scientists with issues ranging from invasive open records requests to death threats.

As part of this work, our staff will be at the American Geophysical Union Fall Meeting from December 10-14, offering free legal services to scientists and leading sessions on how to get involved in the policymaking process and how to be an expert witness.

For those who won’t be at the meeting — and with 2019 around the corner — we put together a list of suggested New Year’s resolutions for scientists. Adopting these best practices will help you reduce your risk of being harassed or attacked.

[Read more…] about Scientists: Resolve to Protect Yourself from Harassment in 2019

Filed Under: Climate Science, Scientific practice

Forced Responses: Dec 2018

2 Dec 2018 by group

A bimonthly thread for discussions on solutions and responses to climate change. For climate science topics, please comment on the Unforced Variations thread.

Filed Under: Climate Science, Open thread

Unforced variations: Dec 2018

2 Dec 2018 by group

This month’s open thread for climate science topics. Please use the Forced Responses thread for solutions and politics.

Filed Under: Climate Science, Open thread

Resplandy et al. correction and response

14 Nov 2018 by group

Guest commentary from Ralph Keeling (UCSD)

I, with the other co-authors of Resplandy et al (2018), want to address two problems that came to our attention since publication of our paper in Nature last week. These problems do not invalidate the methodology or the new insights into ocean biogeochemistry on which it is based, but they do influence the mean rate of warming we infer, and more importantly, the uncertainties of that calculation.

[Read more…] about Resplandy et al. correction and response

References

  1. L. Resplandy, R.F. Keeling, Y. Eddebbar, M.K. Brooks, R. Wang, L. Bopp, M.C. Long, J.P. Dunne, W. Koeve, and A. Oschlies, "Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition", Nature, vol. 563, pp. 105-108, 2018. http://dx.doi.org/10.1038/s41586-018-0651-8

Filed Under: Carbon cycle, Climate Science, Instrumental Record, Oceans

Unforced variations: Nov 2018

1 Nov 2018 by group

This month’s open thread on climate science issues.

A lot of interest in the new Resplandy et al paper (WaPo), with some exploration of the implications on twitter i.e.

Interesting new paper “Quantification of ocean heat uptake from changes in atmospheric O2 and CO2 composition”
But I’m not sure about their argument on the consequences on future warming. 1/https://t.co/g29m3SzIvN

— Reto Knutti (@Knutti_ETH) November 1, 2018

and

https://twitter.com/jamesannan/status/1057944837163491328

Meanwhile, the CMIP6 model output is starting to come out…

Filed Under: Climate Science, Open thread

Unforced variations: Oct 2018

1 Oct 2018 by group

This month’s open thread on climate science topics. Dominant theme this month will probably be the release of the IPCC Special Report on 1.5ºC. The final report will be released later this week, and when it does we’ll give a brief summary. The hastag to follow on Twitter is #SR15.

Filed Under: Climate Science, Open thread

Forced responses: Sep 2018

3 Sep 2018 by group

This thread is the bimonthly open thread for discussion of climate solutions. A good starting point might be this clear description from Glen Peters on the feasibility of staying below 2ºC. Please stick to substantive points and refrain from attacking other commenters (as opposed to their ideas). The open thread for climate science issues is here.

Filed Under: Climate Science, Open thread, Solutions

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