Category Archives: Uncategorized

The most amazing greening on Earth

by Patrick J. Michaels

We’ve long been fond of showing the satellite evidence for planetary greening caused by increasing carbon dioxide, particularly the work of Zhu et al.(2016):

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The debate. Part II

by Judith Curry

Countdown to the ‘conversation’ between Mann, Titley, Moore, Curry.  Looks like you can now register for the live broadcast, for a fee of $10 [link].

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Why Dessler et al.’s critique of energy-budget climate sensitivity estimation is mistaken

By Nic Lewis

Plain language summary

  • A new paper by Andrew Dessler et al. claims, based on 100 simulations of the historical period (1850 to date) by the MPI‑ESM1.1 climate model, that estimates of climate sensitivity using the energy-budget method can vary widely due to internal climate system variability.
  • I calculated what effect the uncertainty implied by the internal variability affecting the MPI‑ESM1.1 simulations had on the distribution of the primary climate sensitivity estimate in the recent Lewis & Curry energy-budget paper.
  • The result was a marginal narrowing of the Lewis & Curry sensitivity estimate. This is because the allowance for internal variability by Lewis & Curry is larger than internal variability in MPI‑ESM1.1.
  • Since historical period energy-budget sensitivity estimates are much more  imprecise for other reasons, internal variability contributes little to their total uncertainty; it is an unimportant factor.
  • Nothing in the new Dessler et al. paper indicates that the Lewis & Curry energy-budget climate sensitivity estimates are likely to be biased low.

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Impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity

by Nic Lewis

We have now updated the LC15 paper with a new paper that has been published in the Journal of Climate “The impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity“.  The paper also addresses critiques of LC15.

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Nature Unbound V – The elusive 1500-year Holocene cycle

by Javier

The existence of a 1500-year climatic cycle during the Holocene, related to the glacial Dansgaard-Oeschger cycle, is a matter of intense debate. However, by introducing precise timing requirements it can be shown that the 1500-year cycle displayed in Northern Hemisphere glacial records is also observed in Holocene records from all over the world.

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Week in review – science edition

by Judith Curry

A few things that caught my eye this past week

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Week in review – water edition

by Judith Curry

A round-up of recent articles from around the world about water — too little, too much, plus new technology and policy ideas.

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Merry Xmas

by Judith Curry

My very best wishes to all during the holiday season, whatever you might be celebrating.

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Balance and the Grid

by Planning Engineer and Jill Tietjen

The power system is a matter of extreme importance relating to economic development, quality of life as well as health and safety. In order to best meet the needs of any given area, it is necessary to balance the factors of economics, reliability and public responsibility. An imbalance in any area will lead to repercussions in other areas and may, in fact, prove to be counterproductive across all areas.

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U.S. Presidential discussion thread. Part XIII

by Judith Curry

Plus UK and Australia political issues.

U.S. Presidential discussion thread. Part X

by Judith Curry

Today marks the end of the Presidential primary season.

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Week in review – policy and politics edition

by Judith Curry

A few things that caught my eye this past week.

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U.S. presidential discussion thread: Part II

by Judith Curry

The U.S. presidential primaries continue to heat up.

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State of the blog discussion thread

by Judith Curry

So, what are your thoughts on the current state of Climate Etc., and how it might evolve?

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Week in review – water edition

by Judith Curry

A few things that caught my eye this past week.

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Renewables and grid reliability

by Planning Engineer

The costs of major grid outages are staggering and recovery from such outages is challenging; therefore the North American grids are planned and operated to ensure high levels of reliability.

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The Climate of XMAS

by Judith Curry

My very best wishes to all of you for the holiday season.

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The new climate ‘deniers’

by Judith Curry

New members of the climate ‘deniers’ club:  James Hansen, Ken Caldeira, Kerry Emanuel, Tom Wigley . . . and Bill Gates.

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Regional anomalies in the evolution of surface air temperature

by Judith Curry

A discussion of Section 6.1 of Alan Longhurst’s book Doubt and Certainty in Climate Science.

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Week in review – science edition

by Judith Curry

A few things that caught my eye this past week.

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Microgrids and “Clean” Energy

by Planning Engineer and Rud Istvan

Microgrids and “clean” energy are intertwined in the minds of many. There is a common belief that microgrids will facilitate “clean” energy and that “clean” energy will better support microgrids.

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JC calendar

by Judith Curry

I have  a busy two weeks coming up.

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APS discussion thread

by Judith Curry

This thread is running parallel to APS members comment on climate change statement, which is open only to APS members.

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Climate change availability cascade

by Judith Curry

Politicians, activists and journalists have stimulated an ‘availability cascade’ [link] to support alarm about human-caused climate change.

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Criticism, tolerance and changing your mind

by Judith Curry

“That’s your responsibility as a person, as a human being — to constantly be updating your positions on as many things as possible. And if you don’t contradict yourself on a regular basis, then you’re not thinking.” – Malcolm Gladwell

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