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climate-debate

China’s Urban Heat Island Problem

by Anthony Watts, April 25, 2018 in WUWT

Beijing has undergone several important urbanization development stages since late 1978. Linked with urbanization, the so-called “urban heat island effect” is a key problem caused by urban land expansion. Such changes in air temperature in Beijing inevitably have an impact on the daily lives of its inhabitants, and is therefore of considerable interest to scientists and the wider public alike.

Dr. Xiaojuan LIU and Associate Professor Guangjin TIAN from the School of Environment, Beijing Normal University, used the mesoscale Weather Research and Forecasting model coupled with a single urban canopy model and high-resolution land cover data to analyze the spatial and temporal patterns of summertime urban warming influenced by three stages of urban land expansion during 1990-2010 across Beijing. They found that urban-induced warming increased with urban land expansion, but the speed of warming declined slightly during 2000-10.

climate-debate

New paper finds strong evidence the Sun has controlled climate over the past 11,000 years, not CO2

by ‘hockeschtick‘, November 27, 2014

A paper published today in Journal of Atmospheric and Solar-Terrestrial Physics finds a “strong and stable correlation” between the millennial variations in sunspots and the temperature in Antarctica over the past 11,000 years. In stark contrast, the authors find no strong or stable correlation between temperature and CO2 over that same period.

We have thus shown
  • Strong correlation between solar activity and climate over the past 11,000 years of the Holocene
  • Strong lack of correlation between CO2 and climate over the past 11,000 years of the Holocene
  • Solar activity explains all 6 well-known warming periods that have occurred during the Holocene, including the current warm period
  • The 20th century peak in sunspot activity is associated with a 40 year lag in the peak global temperature