Sunday, December 06, 2015
Causes of climate change?
The rather childish presentation below was apparently written by Mohamed Alhwaity and appeared in "The Conversation", a webzine that claims to offer "Academic rigour, journalistic flair". If only it did! What I have excerpted below is the core of an article titled: "How scientists know climate change is happening". I have added a few basic notes below to show that they DON'T know that
The Intergovernmental Panel on Climate Change (IPCC) presents six main lines of evidence for climate change.
* We have tracked the unprecedented recent increase in the amount of atmospheric carbon dioxide and other greenhouse gases since the beginning of the industrial revolution. Big deal. That only matters if we know the sensitivity of climate to CO2. It looks like zero or not much more
* We know from laboratory and atmospheric measurements that such greenhouse gases do indeed absorb heat when they are present in the atmosphere. Aren't they supposed to REFLECT heat? Mohamed hasn't even got his Warmism straight.
* We have tracked significant increase in global temperatures of at least 0.85°C and a sea level rise of 20cm over the past century. And why is such a trivial temperature rise a problem?
* We have analysed the effects of natural events such as sunspots and volcanic eruptions on the climate, and though these are essential to understand the pattern of temperature changes over the past 150 years, they cannot explain the overall warming trend. Svensmark has shown a strong solar effect. Now confirmed by experiments at CERN
* We have observed significant changes in the Earth’s climate system including reduced snowfall in the Northern Hemisphere, retreat of sea ice in the Arctic, retreating glaciers on all continents, and shrinking of the area covered by permafrost and the increasing depth of its active layer. All of which are consistent with a warming global climate. But the Antarctic is what matters and it has been COOLING
* We continually track global weather and have seen significant shifts in weather patterns and an increase in extreme events all around the world. Patterns of precipitation (rainfall and snowfall) have changed, with parts of North and South America, Europe and northern and central Asia becoming wetter, while the Sahel region of central Africa, southern Africa, the Mediterranean and southern Asia have become drier. Intense rainfall has become more frequent, along with major flooding. We’re also seeing more heat waves. The statistics indicate FEWER extreme weather events
According to the US National Oceanic and Atmospheric Administration (NOAA) between 1880 and the beginning of 2014, the 19 warmest years on record have all occurred within the past 20 years; and 2015 is set to be the warmest year ever recorded. And those "warm" years have differed from one-another by only hundredths of a degree, which is not statistically significant. The figures in fact show a plateau, not a rise
Posted by John J. Ray (M.A.; Ph.D.).