A recent study by NASA researchers has confirmed the accuracy of recent global warming numbers.
The team used measurements of Earth's "skin temperature" taken with a satellite-based infrared measurement system called AIRS (Atmospheric Infra-Red Sounder) from 2003 to 201
They compared these with station-based analyzes of surface temperature anomalies – mainly the Goddard Institute for Space Research (GISTEMP).
They have found a high degree of agreement between the two datasets over the past 15 years. Their findings are published today in Environmental Research Letters .
The main author Joel Susskind of NASA's Goddard Space Flight Center commented on the study in the following words: higher spatial resolution than GISTEMP and more global coverage.
"Both datasets show that the Earth's surface has warmed up globally during this period and that the warmest years were in instrumental record in 2016, 2017 and 2015.
" This is important because of the intense interest, such as Accurate estimates of global and regional temperature changes from surface temperature data are prepared and known imperfections in the raw data (due to station movement, gaps) (changes to instruments and practices, urban heat island effects) are dealt with.
The AIRS data reflect skin temperature at the surface of ocean, land, and snow / ice surface-based data is a mixture of two-meter surface air data anomalies and sea surface temperature anomalies.
Um To compare the two, the researchers constructed monthly grid point climatologies for each calendar month and for each set of data by averaging the monthly values for the period 2003 to 2017 with anomalies for a given month in a given year, defined as the grid point difference for that month of his monthly climatology.
Co-author Dr. Gavin Schmidt of the NASA's Goddard Institute for Space Studies said, "Interestingly, our results have shown that the surface-based datasets could underestimate temperature fluctuations in the Arctic. This means that the warming at the poles is faster than previously thought.
"Our work also shows that complementary satellite surface temperature analyzes are an important validation for surface-based estimates and could pave the way for improvements in surface-based products that may have been around for decades."
2018 fourth warmest year in ongoing warming trend, according to NASA NOAA
Recently confirmed by AIRS Global Warming, Environmental Research Letters (2019). DOI: 10.1088 / 1748-9326 / aafd4e
NASA Study Confirms Global Warming Trends (2019, April 16)
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