Richard A. Muller

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We report an estimate of the Earth's average land surface temperature for the period 1753 to 2011. To address issues of potential station selection bias, we used a larger sampling of stations than had prior studies. For the period post 1880, our estimate is similar to those previously reported by other groups, although we report smaller uncertainties. The(More)
and political issues increasingly have a strong high-tech content. Misjudge the science, make a wrong decision. Yet many of our leaders never studied physics and do not understand science and technology. does not require physics. Physics for Future Presidents (PffP) is a course designed to address that problem. Physics is the liberal arts of high(More)
A new mathematical framework is presented for producing maps and large-scale averages of temperature changes from weather station data for the purposes of climate analysis. This allows one to include short and discontinuous temperature records, so that nearly all temperature data can be used. The framework contains a weighting process that assesses the(More)
China has recently made available hourly air pollution data from over 1500 sites, including airborne particulate matter (PM), SO2, NO2, and O3. We apply Kriging interpolation to four months of data to derive pollution maps for eastern China. Consistent with prior findings, the greatest pollution occurs in the east, but significant levels are widespread(More)
An analysis team led by Anthony Watts has shown that 70% of the USHCN temperature stations are ranked in NOAA classification 4 or 5, indicating a temperature uncertainties greater than 2C or 5C, respectively. This uncertainty is large compared to the analyses of global warming, which estimate the warming of 0.64 ± 0.13 C over the period 1956 to 2005. The(More)
The effect of urban heating on estimates of global average land surface temperature is studied by applying an urban-rural classification based on MODIS satellite data to the Berkeley Earth temperature dataset compilation of 39,028 sites from 10 different publicly available sources. We compare the distribution of linear temperature trends for these sites to(More)
22 23 We report an estimate of the Earth's average land surface temperature for the period 24 1753 to 2011. To address issues of potential station selection bias, we used larger 25 sampling of stations than had prior studies. For the period post 1880, our estimate is 26 similar to those previously reported by other groups, although we report smaller error(More)
Interannual to decadal variations in Earth global temperature estimates have often been identified with El Nino Southern Oscillation (ENSO) events. However, we show that variability on timescales of 2-15 years in mean annual global land surface temperature anomalies, Tavg are more closely correlated with variability in sea surface temperatures in the North(More)
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