Tag Archives: surface temperature

An example of climate malpractice – creating a hockey stick out of nothing

“The latest version of NOAA’s Global Historical Climatology network (GHCN) has an even more impressive hockey stick than prior versions, showing more than 1.6C warming – with a spectacular post 1970 hockey stick.” click here

NOAA temperature claims are unreliable and manipulated

“NOAA claims that the area of the US with unusually hot summer afternoon temperatures has increased in the US over the past 50 years to record levels.” click here

Temperature data homogenization leads to overestimated warming, Beijing

Lei Zhang, Guo-Yu Ren, Yu-Yu Ren, Ai-Ying Zhang, Zi-Ying Chu, Ya-Qing Zhou. Effect of data homogenization on estimate of temperature trend: a case of Huairou station in Beijing Municipality. Theoretical and Applied Climatology, February 2014, Volume 115, Issue 3-4, pp 365-373

Daily minimum temperature (Tmin) and maximum temperature (Tmax) data of Huairou station in Beijing from 1960 to 2008 are examined and adjusted for inhomogeneities by applying the data of two nearby reference stations. Urban effects on the linear trends of the original and adjusted temperature series are estimated and compared. Results show that relocations of station cause obvious discontinuities in the data series, and one of the discontinuities for Tmin are highly significant when the station was moved from downtown to suburb in 1996. The daily Tmin and Tmax data are adjusted for the inhomogeneities. The mean annual Tmin and Tmax at Huairou station drop by 1.377°C and 0.271°C respectively after homogenization. The adjustments for Tmin are larger than those for Tmax, especially in winter, and the seasonal differences of the adjustments are generally more obvious for Tmin than for Tmax. Urban effects on annual mean Tmin and Tmax trends are −0.004°C/10 year and −0.035°C/10 year respectively for the original data, but they increase to 0.388°C/10 year and 0.096°C/10 year respectively for the adjusted data. The increase is more significant for the annual mean Tmin series. Urban contributions to the overall trends of annual mean Tmin and Tmax reach 100% and 28.8% respectively for the adjusted data. Our analysis shows that data homogenization for the stations moved from downtowns to suburbs can lead to a significant overestimate of rising trends of surface air temperature, and this necessitates a careful evaluation and adjustment for urban biases before the data are applied in analyses of local and regional climate change.

Surface temperature data tampering is real

Antarctic Peninsula Islands show a cooling trend

“13 of 13 Antarctic Peninsula and nearby island stations show cooling over the past 21 years. There hasn’t been any warming there so far this century.” click here

NOAA temperature adjustments are arbitrary

“North American snow cover has been increasing during the snow season for the past fifty years.” click here

Powerful software available to analyze GHCN temperature data

Surface temperatures have been generally decreasing in the United States. Now software is freely available for anyone to check this out for themself.

Click here for the windows version.

Click here for the linux/Mac version.