The Earth's lower troposphere temperature in recent decades:
Dr. Joe Romm, founding Editor of Climate Progress, writing for Think Progress, posted a note titled: "We did it again! [2016-] November is hottest on record."
He included a graph of the "Lower troposphere temperature" of the Earth, as measured between the 1980's and 2016. The troposphere extends from the earth's surface to a height of 6 to 10 km (3.7 to 6.2 miles). Each point shown on the graph is the average temperature from December of the previous year to November of the current year. The data comes from RSS satellites. He stated in late 2016:
"... These data show that not only is November 2016 the hottest on record, but [that] there is an ongoing, annual trend."
Credit: Hotwhopper. 2
The average rate of warming is 0.18ºC/ per decade or 1.8ºC per century. That is 0.32ºF/ per decade or 3.2ºF per century. The consistent rise over recent years to 2013 to 2016 is probably partly driven by El Nino which reached a peak in 1016 and is decreasing during 2017.
The sloping line shown on the graph is generated by the equation: [y = 0.018 * x - 36.025], where Y = temperature in ºC, and
X = year.
2017: National Oceanic and Atmospheric Administration (NOAA) data showing the temperature at the Earth's surface during the 20th and 21st centuries:
The ten warmest years are shown highlighted in red, with 2016 -- the warmest -- shown in bold. They all occurred in the 21st century.
The ten coldest years are shown in green with the coldest shown in bold. They all occurred in the 20th century.
The Cause: NOAA data showing the carbon dioxide level in the atmosphere in parts per million, 1958 to 2016:
NOT the Cause: The Sun's energy output in watts per square meter:
It has an 11 year cycle, but no noticeable trend up or down:
One effect: NOAA data showing global average temperature rise in Degrees Celsius compared to the 20th century average temperature:
(Multiply temperature rise by 1.8 to convert to Degrees Fahrenheit)
A second effect: Average shrinking in the thickness of the world's glaciers in meters of water equivalent:
(Multiply thickness by 3.28 to convert to feet)
A third effect: Reduced ice coverage in the Arctic Sea:
The extent of sea ice in the Arctic varies during the year. It typically reaches a maximum during May and a minimum during September. 5 The BBC published a graph prepared by the National Snow and Ice Data Center showing the yearly minimum extent of sea ice between 1980 (when it was 7.8 million square km or 3.01 million square miles) to 2015 (when it was 4.6 million square km or 1.77 million square miles).
One result of this loss of coverage are polar adventure expeditions through the NorthWest Passage.
A fourth effect: Global average sea level in millimeters relative to the year 2000:
(Multiply level rise by 0.394 to convert to inches)