Category Archives: Data and observations

by Tony Brown

Over the last 15 years interesting things have been happening at CET-the world’s longest instrumental record, dating to 1660.

Continue reading →

by Judith Curry

The scientific and political controversies surrounding the hiatus have continued to heat up. Lets take a look at ALL the global temperature data sets.

Continue reading →

by Judith Curry

The hiatus lives.

Continue reading →

by Judith Curry

A new blockbuster paper published today by NOAA:

These results do not support the notion of a “slowdown” in the increase of global surface temperature.  

Color me ‘unconvinced.’

Continue reading →

by Fred Haynie

I conclude that, the IPCC’s model assumptions that long-term natural net rate of accumulation is constant and anthropogenic emission rates are the only contributor to total long-term accumulation of atmospheric CO2, is false.

Continue reading →

by Judith Curry

I’m scratching me head over this one.

Continue reading →

by Tom Quirke

The raw Melbourne temperature records of the Bureau of Meteorology are compared to the ACORN-Sat values. The ACORN-Sat adjustments are evaluated. This analysis shows evidence for a strong urban heat island effect.

Continue reading →

by Euan Mearns

UK blogger Paul Homewood and Telegraph columnist Christopher Booker have managed to stir public interest in the veracity of adjustments made to temperature records by the Global Historical Climatology Network (GHCN).

Continue reading →

by Roger Pielke Sr., Phil Klotzbach, John Christy and Dick McNider

An update is presented of the analysis of Klotzbach et al. 2009.

Continue reading →

by Zeke Hausfather

Global temperatures are adjusted to account for the effects of station moves, instrument changes, time of observation (TOBs) changes, and other factors (referred to as inhomogenities) that cause localized non-climatic biases in the instrumental record.

Continue reading →

by Robert Rohde, Zeke Hausfather, Steve Mosher

Christopher Booker’s recent piece along with a few others have once again raised the issue of adjustments to various temperature series, including those made by Berkeley Earth. And now Booker has double-downed accusing people of fraud and Anthony Watts previously insinuated that adjustments are somehow criminal .

Continue reading →

by Judith Curry

So, was 2014 the ‘warmest year’?  Drum roll . . .

Continue reading →

by Judith Curry

The buzz is intensifying about 2014 possibly being the warmest year globally in the historical temperature record.

Continue reading →

by Carol Anne Clayson

A significant area of uncertainty in climate science and one of the biggest limitations on our ability to predict the timing, location and impacts of climate change is our limited understanding of ocean processes and their interactions with the atmosphere, land, and ice systems.

Continue reading →

by Judith Curry

Direct determination of changes in oceanic heat content over the last 20 years are not in conflict with estimates of the radiative forcing, but the uncertainties remain too large to rationalize e.g., the apparent “pause” in warming. – Wunsch and Heimbach

Continue reading →

by Zeke Hausfather

There has been much discussion of temperature adjustment of late in both climate blogs and in the media, but not much background on what specific adjustments are being made, why they are being made, and what effects they have. Adjustments have a big effect on temperature trends in the U.S., and a modest effect on global land trends. The large contribution of adjustments to century-scale U.S. temperature trends lends itself to an unfortunate narrative that “government bureaucrats are cooking the books”.

Continue reading →

Our algorithm is working as designed. – NOAA NCDC

Continue reading →

by Judith Curry

Given the new information now available from the Southern Hemisphere, climate scientists must consider a larger role for natural climate variability in contributing to global temperature changes over the past millennium. – Kim Cobb

Continue reading →

by Steve Mosher

We’ve completed the first draft of our global monthly product.

Continue reading →

by Judith Curry

Central to arguments related to the hiatus and the ‘missing heat’ is the assertion that unusual amounts of heat are being stored in the deep ocean, and that this heat will eventually reappear at the surface.  Exactly how good is the ocean heat content data on which this argument is based?

Continue reading →

by Steve McGee

Unlike many fiscal budgets, earth’s energy budget is widely believed to be in surplus.

Continue reading →