A paper published in Nature magazine in 2014 (see link below) looked at recent trends in global temperature in the lower troposphere (TLT) from satellite observations and attempted to remove the effects from major volcanic activity and from the El Nino Southern Oscillation (ENSO). The result indicates no global warming for over 20 years now, despite the continued rapid increase in carbon dioxide concentrations. Yet one more study that greatly calls into question the “settled science” of man-made global warming. More evidence that the effects of man-made carbon dioxide on global temperature are quite small and perhaps not even significant. See the graphs below.
Most people don’t realize that carbon dioxide is NOT a pollutant and is absolutely critical for plant survival. Higher carbon dioxide levels actually promote more rapid plant growth and therefore have a major beneficial effect for crops as well as natural plant growth. From 3 million years ago back to more than 200 million years ago, Earth had no glaciers, global temperatures were much warmer, and carbon dioxide levels were much higher than today. Then about about 3 million years ago at the start of the Pleistocene period for reasons unknown global temperatures gradually cooled and Earth entered an ice age that continues today.
We are lucky to live in one of the relatively short interglacial warm periods between the much longer intense glacial periods. During the last 500,000 years there have been five intensely cold glacial periods each lasting about 80,000 to 100,000 years and separated by interglacial warm periods with much less ice but each lasting only about 10,000 to 15,000 years on average. Our present interglacial period is called the Holocene and started about 11,700 years ago and based on past history will likely end sometime within the next few thousand years or less. The next glacial period will be a major challenge for humanity, with ice covering most of Canada, the northern US, and northern Europe. With colder global temperatures come drier air and expanding deserts as well as much lower carbon dioxide levels that will inhibit plant growth. We should count our blessings today and explore the deep meaning of true climate change over the ages to prepare for what will come.
Thanks to Paul Homewood for the tip:
No Underlying Global Temperature Increase For 20 Years
Original 2014 paper by Benjamin Santer, et al, in Nature:
Volcanic contribution to decadal changes in tropospheric temperature
More on Earth’s climate changes in the last 3 million years:
Three Million Years of Climate Change