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Judith Curry

Judith Curry - 2018-02-18 - Original post - cached version

by Judith Curry

Part IV of the Climate Etc. series on sea level rise focuses on the satellite era (since 1993), including the recent causes of sea level variations and arguments regarding the acceleration (or not) of recent sea level rise.

Part III considered historical sea level...

Judith Curry - 2018-02-15 - Original post - cached version

by Judith Curry

Big news in the world of ‘climate wars’ – the libel case of Andrew Weaver versus Tim Ball has been dismissed by the judge —  for a rather surprising reason.

Some context on all this is provided in a WUWT post by Tim Ball — Tim Ball’s Victory in the First Climate...

Judith Curry - 2018-02-12 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

The real culprit behind snowmelt floods isn’t temperature – its dirt [link]

Pacific Islands Getting Bigger, Despite Rising Seas [link] 

New paper by Dan Lubin at Scripps: Cooling Sun May Partially Offset...

Judith Curry - 2018-02-10 - Original post - cached version

By Judith Curry

“We are in the uncomfortable position of extrapolating into the next century without understanding the last.” – Walter Munk 

Part II provided an overview of the relatively recent geological evidence for sea level variations. Part III considers the historical...

Judith Curry - 2018-02-05 - Original post - cached version

by Nic Lewis

Recently a new model-based paper on climate sensitivity was published by Kate Marvel, Gavin Schmidt and others, titled ‘Internal variability and disequilibrium confound estimates of climate sensitivity from observations’.[1]

As some readers may recall, I found six...

Judith Curry - 2018-02-01 - Original post - cached version

by Judith Curry

Inspiring biosketches of some amazing female scientists, which rather astonishingly includes moi.

While at the Annual Meeting of the American Meteorological Society a few weeks ago, a number of people mentioned my Girls Rule(s) blog post, saying that it stimulated...

Judith Curry - 2018-01-28 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

Paper of the week:

Decreasing cloud cover drives recent mass loss on the Greenland ice sheet

Abstract. The Greenland Ice Sheet (GrIS) has been losing mass at an accelerating rate since the mid-1990s....

Judith Curry - 2018-01-26 - Original post - cached version

by Phil Salmon

How a small group of people from Africa changed the world.

Paleoclimatology, the study of climate in the past all the way back to deep time, is one of the pillars of climate science. It shows us the wide range of climates that have existed on earth, from near-global...

Judith Curry - 2018-01-24 - Original post - cached version

By Judith Curry

Part II of the Climate Etc. series on sea level rise –the geological record provides context for the recent sea level rise.

Part I provided a context for examining observations and causes of global sea level rise. I greatly appreciate the comments on the blog posts...

Judith Curry - 2018-01-22 - Original post - cached version

by Javier

Climate variations that alter the angular momentum of the atmosphere modify the speed of the Earth’s rotation, which affects the length of day (LOD). Alterations in LOD integrate different climate-affecting phenomena, and can anticipate turning points in climate.

Several...

Judith Curry - 2018-01-20 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

The folks at the @metoffice put together an excellent explainer on 2017 temperatures. Differences between groups largely arise from how they deal with interpolation in polar regions. [link] …

Jim Hansen:...

Judith Curry - 2018-01-16 - Original post - cached version

by Judith Curry

Introduction and context for a new Climate Etc. series on sea level rise.

I have several clients that are interested in the issue of sea level rise, from a range of perspectives (insurance, engineers, city and regional planning, liability). I am preparing a...

Judith Curry - 2018-01-03 - Original post - cached version

by Judith Curry

Short summary: scientists sought political relevance and allowed policy makers to put a big thumb on the scale of the scientific assessment of the attribution of climate change.

Bernie Lewin has written an important new book:

SEARCHING FOR THE CATASTROPHE...

Judith Curry - 2018-01-01 - Original post - cached version

by Judith Curry

Happy New Year everyone!  My ‘prognostications’, hopes and goals for 2018.

Well 2017 was quite a year, as the U.S. and rest of the world adapted to President Trump.  It was quite a year for me personally also, my first year of retirement from university.

...

Judith Curry - 2017-12-31 - Original post - cached version

by Judith Curry

A few things that have caught my eye these past weeks.

In a somewhat futile attempt at information management, I’m doing some ‘house cleaning’ of my online files, so that I have a fresh start for the new year.  New Year’s resolution is not to let more than two...

Judith Curry - 2017-12-28 - Original post - cached version

by Judith Curry

“I think open explorations of the ideological assumptions scientists bring into policy debates are not only welcome but often necessary for having productive conversations.” – Aaron Huertas

Over the Xmas holiday, I got involved in a wide ranging discussion on...

Judith Curry - 2017-12-25 - Original post - cached version

by Nic Lewis

My reply to Patrick Brown’s response to my my comments on his Nature article.

Introduction

I thank Patrick Brown for his detailed response (also here) to statistical issues that I raised in my critique “Brown and Caldeira: A closer look shows global warming...

Judith Curry - 2017-12-22 - Original post - cached version

by Peter Lang

Could the costs of nuclear power have been 10% of what they are if not for the disruption?

A new paper, Nuclear Power Learning and Deployment Rates: Disruption and Global Benefits Forgone [1], finds that nuclear power could now be around 10% of current cost, and have...

Judith Curry - 2017-12-21 - Original post - cached version

by Patrick Brown

A response to Nic Lewis’ post A closer look shows global warming will not be greater than we thought.

We recently published a paper in Nature in which we leveraged observations of the Earth’s radiative energy budget to statistically constrain 21st-century climate...

Judith Curry - 2017-12-20 - Original post - cached version

by Jim Johnstone and Judith Curry

Climate Forecast Applications Network (CFAN) has identified new early precursors for seasonal Atlantic hurricane activity that involve systematic, repeating interactions among ENSO, stratospheric circulations and regional North Atlantic processes.

...
Judith Curry - 2017-12-15 - Original post - cached version

by Nic Lewis

A critique of a recent paper by Brown and Caldeira published in Nature that predicted greater than expected global warming.

Last week a paper predicting greater than expected global warming, by scientists Patrick Brown and Ken Caldeira, was published by Nature.[1] The...

Judith Curry - 2017-12-14 - Original post - cached version

by Peter Hartley

Although technological progress can alter the relative costs of different energy sources, depletion inevitably must raise the costs of fossil fuels leading to their displacement by alternative energy sources. What energy technology will likely be used when fossil fuels...

Judith Curry - 2017-12-13 - Original post - cached version

by Larry Kummer

We’re told that climate change caused or intensified California’s wildfires — and that such fires are getting worse. As usual for such scary stories, these claims are only weakly supported by science — except for the ones that are outright fabrications.

...
Judith Curry - 2017-12-11 - Original post - cached version

by Judith Curry

The #MeToo movement is spawning considerable reflection in academia.  Here are some reflections and advice from a senior female scientist (moi) who came up through the academic system during the bad old days of the 1970’s and 1980’s, and who has mentored many young female...

Judith Curry - 2017-12-10 - Original post - cached version

by Telis Koskinas

On February 2017, Oroville Dam gained worldwide attention when its main spillway suddenly failed, seemingly without precedent, under natural operating conditions.

While thankfully no casualties were caused by this incident, its direct and indirect effects will be...

Judith Curry - 2017-12-02 - Original post - cached version

by Javier

Summary: Holocene climate has been affected in different periods by several centennial to millennial solar cycles. The ~ 1000-year Eddy solar cycle seems to have dominated Holocene climate variability between 11,500-4,000 years BP, and in the last two millennia, where it defines...

Judith Curry - 2017-12-01 - Original post - cached version

by Jim Johnstone and Judith Curry

The good news: the 2017 Atlantic hurricane season is over.  The bad news: it was an extremely active season, with substantial damage in the U.S. and the Caribbean islands. What caused this extremely active hurricane season, and was it foreseeable?

...
Judith Curry - 2017-11-29 - Original post - cached version

by Judith Curry

In private, climate scientists are much less certain than they tell the public. – Rupert Darwall

Rupert Darwall has written a tour-de-force essay “A Veneer of Certainty Stoking Climate Alarm“, which has been published by CEI [link to full essay].

Foreword...

Judith Curry - 2017-11-19 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

“The study’s authors estimate groundwater depletion in the United States could be responsible for releasing 1.7 million metric tons (3.8 billion pounds) of carbon dioxide to the atmosphere every year.”[link]

...

Judith Curry - 2017-11-14 - Original post - cached version

by Judith Curry

National security implications of the rapidly changing global population dynamic.

Earlier this week, Peter Webster made a presentation at the National Security Forum on The coming global demographic imbalance [link] to the ppt presentation.

Below is the...

Judith Curry - 2017-11-03 - Original post - cached version

by Judith Curry

Red-teaming the the U.S. government’s Climate Science Special Report on the topic of sea level rise.

Steve Koonin as a new op-ed in the WSJ:  A Deceptive New Report on Climate.  that clarifies the need for a Climate Red Team.  Excerpts:

One notable example...

Judith Curry - 2017-11-02 - Original post - cached version

by Judith Curry

Mannian litigation gone wild. — Steve McIntyre

Details given by Michael Schellenberger in Environmental Progress:

Stanford University professor Mark Z. Jacobson has filed a lawsuit, demanding $10 million in damages, against the peer-reviewed scientific...

Judith Curry - 2017-10-27 - Original post - cached version

By Planning Engineer

Considerable efforts are being undertaken to restore power in Puerto Rico. Most coverage has been pessimistic focusing on challenging logistics and contentious issues with very little upbeat coverage on progress so far. There is one major exception to this trend, the...

Judith Curry - 2017-10-22 - Original post - cached version

by Judith Curry

The aim of education is to make people think, not spare them from discomfort. – Robert Zimmer

Campus craziness

In case you haven’t been following this issue, there have been some disturbing events and trends in the ivory tower.  For an overview, see:

In...
Judith Curry - 2017-10-07 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

Did a slower AMOC 12,000 yrs ago contribute to increased hurricane intensity? [link]

Low-Frequency Climate Modes and Antarctic Sea Ice Variations, 1982-2013 [link] 

Understanding the detectability of...

Judith Curry - 2017-10-06 - Original post - cached version

by Judith Curry

My recent interview with David Whitehouse of the Global Warming Policy Foundation on Hurricanes Harvey and Irma and the link with global warming.

The video of the interview:

Transcript:

DW:  First of all – do we understand hurricanes?

JC:  We...

Judith Curry - 2017-09-26 - Original post - cached version

by Ross McKitrick

A number of authors, including the IPCC, have argued that climate models have systematically overstated the rate of global warming in recent decades. A recent paper by Millar et al. (2017) presented the same finding in a diagram of temperature change versus cumulative...

Judith Curry - 2017-09-24 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

Concepts for dealing with complexity of weather and climate. [link]

Nature: Halfway to doubling of CO₂ radiative forcing (3.7W/m²), but doubling CO₂ ppm comes later due to log RF relationship [link]  …

...

Judith Curry - 2017-09-16 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

New J.Clim paper: hi res model finds fewer but stronger, wetter, and larger tropical cyclones with global warming [link]  …

PNAS:  the biosphere has become less constrained by water stress globally [link]

...
Judith Curry - 2017-09-15 - Original post - cached version

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...

Judith Curry - 2017-09-08 - Original post - cached version

by Judith Curry

Cat 5 Hurricane Irma is one for the record books; it’s eye is on Florida.

___________

Summary

Major Hurricane Irma is predicted to strike the SW coast of Florida as a Cat 4 early Sun a.m., with a northward track covering the entire length of the state and...
Judith Curry - 2017-09-02 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

Modulation of the seasonal cycle of Antarctic sea ice extent related to the Southern Annular Mode [link]

Extreme warming in the Kara Sea and Barents Sea during the winter period 2000 to 2016 [link] 

New...

Judith Curry - 2017-08-28 - Original post - cached version

by Judith Curry

The 12 year drought of major hurricane landfalls in the U.S. is over, with catastrophic impacts in Texas.  Predictions of Hurricane Harvey illustrate the realization of extended- and long-range hurricane forecasts.

This blog post analyzes the forecasts of Hurricane...

Judith Curry - 2017-08-21 - Original post - cached version

by Judith Curry

Calling on CE Denizens to review the Climate Science Special Report:  nominate an official reviewer, or participate in the CE Crowdsourced Review.

Pat Michaels recently posted an article at CE National Climate Assessment and the Tump administration. His post...

Judith Curry - 2017-08-21 - Original post - cached version

by Judith Curry

This post is running parallel to the post Reviewing the Climate Science Special Report (a technical post), to accommodate general discussion on the topic

Judith Curry - 2017-08-19 - Original post - cached version

by Judith Curry

A few things that caught my eye this past week.

New study finds most of East #Antarctic ice sheet should remain stable. [link]

Linking global temperature and Arctic sea ice changes [link] …

On the possible contribution of natural climatic fluctuations...

Judith Curry - 2017-08-16 - Original post - cached version

by Dr. Ronan Connolly & Dr. Michael Connolly

Satellite observations indicate that the average Arctic sea ice extent has generally decreased since the start of the satellite records in October 1978. Is this period long enough to assess whether the current sea level trend is unusual,...

Judith Curry - 2017-08-15 - Original post - cached version

by Judith Curry

For the sake of argument, let’s accept the IPCC conclusions regarding attribution of global warming, and their 21st century projections.  So, exactly who in the U.S. bears the blame for current and future damages?

This is not an academic question. There are two...

Judith Curry - 2017-08-07 - Original post - cached version

by Javier

A possible mechanism for the effect of solar variability on climate, whereby solar variability acts over the stratospheric pressure system transmitting the changes top-down, and over ocean temperatures bottom-up.

Summary: In part A, we established the existence of a ~...

Judith Curry - 2017-08-06 - Original post - cached version

by Peter Davies

While onshore wind generation has been relatively inexpensive for some time, solar PV and lithium ion battery storage costs have recently shown dramatic reductions. So can Texas, with excellent onshore wind and solar resources, be powered economically entirely by...

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