by X Anonymous
According to the IPCC, “climate variability refers to variations in the mean state and other statistics (such as standard deviations, the occurrence of extremes, etc.) of the climate on all spatial and temporal scales beyond that of individual weather events. Variability may be due to natural internal processes within the climate system (internal variability), or to variations in natural or anthropogenic external forcing (external variability).”
Posted in Attribution
by Judith Curry
Update: New comment from Xie
My mind has been blown by a new paper just published in Nature.
Posted in Attribution, climate models
by Judith Curry
Recent observed global warming is significantly less than that simulated by climate models. This difference might be explained by some combination of errors in external forcing, model response and internal climate variability.
Posted in Attribution, climate models
Posted in Uncertainty
by Judith Curry
Well, if you judge ‘sides’ by what climate scientists have to say about the science, it is getting difficult to tell.
I have an interview tonite on NPR’s All Things Considered.
Posted in Communication, Policy, Politics, Uncertainty
by Judith Curry
Is the dramatic decline of Arctic sea ice, spurred by manmade global warming, making the weather where we live more extreme? Several recent studies have made this claim. But a new study finds little evidence to support the idea that the plummeting Arctic sea ice has meaningfully changed our weather patterns.
Posted in Polar regions
by Judith Curry
Motivated reasoning affects scientists as it does other groups in society, although it is often pretended that scientists somehow escape this predicament.
Posted in Ethics, Scientific method
by Judith Curry
What are the implications of climate model deficiencies in simulating multi-decadal natural internal variability for IPCC’s climate change detection and attribution arguments?
Posted in Attribution, climate models
by Judith Curry
Is “best available evidence” a new, improved “reframing” of the so-called “consensus” (that is not really holding up too well, these days)? Is it simply a way of sweeping aside the validity of any acknowledgement/discussion of the uncertainties? Or is it something completely different?! – Hilary Ostrov
Posted in Communication, Scientific method
by Judith Curry
Increasing CO2 may actually help relieve the water stress associated with increasing global population.
Posted in Climate change impacts
by Johanna
The politicisation of climate science is perhaps best illustrated by the emerging role of the social sciences in placing interpretations on human perception of, and responses to, “the science.”
Posted in Sociology of science
by Judith Curry
A new publication in Nature Geoscience projects an increase in runoff from Himalayan catchmants during the 21st century, despite a decline in glacier size.
Posted in Climate change impacts, South Asia
by Judith Curry
The world’s poor need more than a token supply of electricity. The goal should be to provide the power necessary to boost productivity and raise living standards. – Morgan Brazilian and Roger Pielke Jr.
by Judith Curry
Advocacy by scientists seems to be the issue of the week. What (if anything) constitutes responsible advocacy by scientists?
Posted in Ethics
Posted in Consensus
Posted in Policy
by Judith Curry
Pilita Clark has written a thoughtful post at the Financial Times entitled What climate scientists talk about now, with subtitle “As the IPCC prepares to release its latest report, Pilita Clark meets some of the key scientists behind it.”
Posted in IPCC
by Judith Curry
Earlier dire predictions have been made in the same mode by Malthus on food security, Jevons on coal exhaustion, King & Murray on peak oil, and by many others. They have all been overcome by the exercise of human ingenuity just as the doom was being prophesied. – Michael Kelly
Posted in Uncategorized
by Judith Curry
Having great intelligence or specialized knowledge isn’t assurance against a person remaining unbiased in their public opinions.
Posted in Ethics
As a climate scientist, I’m under pressure to be a political advocate. – Tamsin Edwards
Posted in Ethics
by Judith Curry
The economic value of climate mitigation depends sensitively on the slim possibility of extreme warming.
Posted in Economics, Sensitivity & feedbacks
