ArticleTemp

Earth’s Surface Temperature has been rising globally over the past 15 years

Environment
Rising Earth Temperatures

NASA researchers have used Satellite measurements to verify the ground-based data which showed that the Earth’s surface has been warming globally over the past 15 years.

NASA Researchers used measurements of the Earth’s skin/surface temperature satellite-based infrared measurement system called AIRS (Atmospheric Infra-Red Sounder) for nearly 15 years from 2003 to 2017.

In order to Compare the data to understand the change in the surface temperature of Earth. The NASA researchers used station-based analyses of surface air temperature anomalies principally from the Goddard Institute for Space Studies Surface Temperature Analysis (GISTEMP).

The Global Surface Temperature study was published in the journal Environmental Research Letters, and the outcome of this research showed that the researchers found a high level of consistency between the two datasets over the past 15 years.

Joel Susskind, from Nasa’s Goddard Space Flight Center in the US in his statement, said that “AIRS data complement GISTEMP because they are at a higher spatial resolution than GISTEMP, and have more complete global coverage.”

Susskind also said that the “Both data sets demonstrate the Earth’s surface temperature has been warming globally over this period, and that 2016, 2017, and 2015 have been the warmest years in the instrumental record, in that order.”

Susskind explains the importance of this research by saying “This is important because of the intense interest in the detail of how the estimation of global and regional temperature change are constructed from earth surface temperature data, and this research showed how known imperfections in the raw data are handled.”

The data collected from AIRS reflects earth’s skin/surface temperature at the surface of the ocean, land and snow/ice covered regions.

Earth’s Skin/Surface-based data are a blend of two-meter surface air data anomalies over land, and bulk sea surface temperature anomalies in the ocean.

The researchers constructed monthly grid-point climatologies in order to compare these two data and they did it for each calendar month and for each set of data, by averaging the monthly values over 2003 to 2017.

Gavin Schmidt who works in the Nasa’s Goddard Institute for Space Studies, explains that their findings revealed that the surface-based data sets may be underestimating the temperature changes in the Arctic.

Schmidt expresses his concern over rising temperature by saying “This means the warming taking place at the poles may be happening more quickly than previously thought”.