Tag Archives: global temperature

Is the global temperature record credible?

Systematic errors in Resplandy et al 2018 paper highlights the problem of inadequate peer-review

“However Lewis, who has authored several peer-reviewed papers on the question of climate sensitivity and has worked with some of the world’s leading climate scientists, has found that the warming trend in the Resplandy paper differs from that calculated from the underlying data included with the paper.” click here and here

UAH Satellite-Based Global Lower Atmospheric Temperatures

Source: drroyspencer.com

Little evidence global warming comes predominantly from human activity

“The multiple lines of evidence which do exist are simply evidence that the world is warming, not proof that the warming comes predominantly from human activity. “ click here

Climate warmer in Roman and Midieval times

Jan Esper, David C. Frank, Mauri Timonen, Eduardo Zorita, Rob J. S. Wilson, Jürg Luterbacher, Steffen Holzkämper, Nils Fischer, Sebastian Wagner, Daniel Nievergelt, Anne Verstege, Ulf Büntgen. Orbital forcing of tree-ring data Nature Climate Change, volume 2, 862–866 (2012).

Solar insolation changes, resulting from long-term oscillations of orbital configurations1, are an important driver of Holocene climate2,3. The forcing is substantial over the past 2,000 years, up to four times as large as the 1.6 W m−2 net anthropogenic forcing since 1750 (ref. 4), but the trend varies considerably over time, space and with season5. Using numerous high-latitude proxy records, slow orbital changes have recently been shown6 to gradually force boreal summer temperature cooling over the common era. Here, we present new evidence based on maximum latewood density data from northern Scandinavia, indicating that this cooling trend was stronger (−0.31 °C per 1,000 years, ±0.03 °C) than previously reported, and demonstrate that this signature is missing in published tree-ring proxy records. The long-term trend now revealed in maximum latewood density data is in line with coupled general circulation models7,8 indicating albedo-driven feedback mechanisms and substantial summer cooling over the past two millennia in northern boreal and Arctic latitudes. These findings, together with the missing orbital signature in published dendrochronological records, suggest that large-scale near-surface air-temperature reconstructions9,10,11,12,13 relying on tree-ring data may underestimate pre-instrumental temperatures including warmth during Medieval and Roman times.

Hothouse earth paper is advocacy dressed up as science

“Yet, it is not a research paper and contains nothing new in the way of climate science. It is a future scenario pieced together by quoting selected (cherry-picked) references with a lot of hand-waving in-between. The author’s say it’s not conclusive, and they hope it’s not going to be true. They have a responsibility to ask the question, they claim, admitting it’s extreme.” click here

US surface temperatures decreasing…

“Over the last century, August 7th afternoon temperatures have plummeted in the US. In 1930, the average temperature was 93 degrees and almost 70% of the country was over 90 degrees. Compare vs August 7, 2017, which had an average temperature of 81 degrees and less than 20% of the US over 90 degrees.” click here