New paper suggests no warming in NZ in past 100 years

The New Zealand Climate Science Coalition today issued a press release:

New Zealand may not have warmed at all in the past 100 years, according to a peer-reviewed paper published in the international science journal, Environmental Modeling & Assessment. The paper, A Reanalysis of Long-Term Surface Air Temperature Trends in New Zealand, by New Zealand authors Chris De Freitas, Bob Dedekind and Barry Brill, covering the period 1909-2009, shows an increase of 0.28+/-0.29 °C/century, compared with the current official NIWA seven-station series (7SS) showing an increase of nearly 1 °C/century. Continue Reading →

de Freitas temperature study reaches top 5% of 3.67M scientific papers

Confirms Salinger’s Trojan Horse (see below)

Altmetric ranking

Altmetric ranking for de Freitas et al in January. Current Altmetric ranking (click SCORE IN CONTEXT on SUMMARY tab then click a category for details). Click to enlarge.

I am delighted to report that A Reanalysis of Long-Term Surface Air Temperature Trends in New Zealand (de Freitas, Dedekind & Brill, 2014) is top-ranked by Altmetric.

Altmetric has tracked 20 articles from EMA, the journal our authors used, and our paper tops them all. More significantly, it ranks in the top 5% of all 3,671,975 articles ever tracked by Altmetric, and in the top 8% of 102,471 articles published around the same time. It’s an outstanding result. Continue Reading →

What Mullan actually says

In Renowden’s latest apologia at Hot Topic it is quite difficult to discern Brett Mullan’s arguments through the thicket of abuse and misdirection created by Renowden. But I think these are the debating points he’s trying to make, lined up with the passages in which he makes them.

Point 1

When he says:

Let me pose a question. What does Dedekind think Rhoades and Salinger were doing in their 1993 paper? Indulging in a purely theoretical exercise? In fact, they developed their techniques by working on what became the Seven Station Series (7SS), and from 1992 onwards the 7SS was compiled using RS93 methods properly applied.

We’ll call that Debating point 1. From 1992 onwards the 7SS was recalculated using the Rhoades & Salinger (1993) measurement techniques.

Continue Reading →

Analysis of Renowden’s analysis of our reanalysis

• Guest post •

— by Bob Dedekind

Introduction

I chuckled at Gareth Renowden’s attempt to rebut our paper, for two reasons: he makes many mistakes and whoever is feeding him bits of information seems to let him down.

I printed out and highlighted his mistakes so I could deal with them individually. However, when I had finished the whole article was one big highlighted blob, so I’ll focus just on the most glaring mistakes. Continue Reading →

Paper adds interesting perspective on NZ temperature trend

Today a paper on the New Zealand temperature record (NZTR) was accepted by the journal Environmental Modeling & Assessment. Submitted in 2013, we can only imagine the colossal peer-review hurdles that had to be overcome in gaining acceptance for a paper that refutes the national temperature record in a developed country. The mere fact of acceptance attests to a fundamental shift in scientific attitudes to climate change, but expect strident opposition to this paper. Continue Reading →