2023-08-16 15:15:18
July 2023 has been determined, on average, to have been the hottest of all July months since global temperature measurements began systematically in 1880.
According to researchers at NASA’s Goddard Institute for Space Studies (GISS) in New York, July 2023 was the hottest month ever recorded in the global temperature record.
As a whole, July 2023 was 1.1 degrees Celsius warmer than the average July between 1951 and 1980. The GISS analysis focuses primarily on long-term temperature changes over decades and centuries, taking a fixed period as a reference. . “Normal” temperatures are defined by several decades or more, typically 30 years.
“NASA data confirms what billions of people around the world have literally felt: July 2023 temperatures made it the hottest July on record,” said NASA Administrator Bill Nelson. . “The science is clear: we must act now to protect our planet; It’s the only one we have.”
Some places in South America, North Africa, North America and the Antarctic Peninsula have been especially hot, experiencing temperature increases of about 4 degrees Celsius. Overall, this summer’s extreme heat has placed many millions of people under heat alerts and has been linked to hundreds of heat-related illnesses and deaths. The July record continues a long-term trend of warming caused by human activities and driven primarily by greenhouse gas emissions. This trend has become evident in the last four decades. According to NASA data, the five hottest joules since 1880 have occurred in the last five years.
This graph shows, based on NASA’s GISTEMP analysis, the global temperature anomalies for each July since 1880, when temperature measurements began to be made systematically. The anomalies reflect to what extent the global temperature in the months of July was above or below the temperature in joules taken as a reference, that of the period 1951-1980. (Graphic: NASA Goddard Institute for Space Studies)
“Climate change is affecting people and ecosystems around the world, and we fear that many of these impacts will intensify as global warming continues,” said Katherine Calvin, chief scientist and senior climate advisor at headquarters. from NASA in Washington.
NASA builds its temperature record from surface air temperature data from tens of thousands of weather stations, as well as sea surface temperature data from ships-mounted instruments and buoys. These raw data are analyzed using methods that take into account the variable spacing of temperature measurement stations around the globe and the effects of urban warming that could skew the calculations.
“This July has not only been warmer than previous Julys, but it has been the warmest month in all our records, which go back to 1880,” reiterates Gavin Schmidt, director of GISS. “Science makes it clear that this is not normal. The alarming global warming is mainly due to man-made greenhouse gas emissions.”
High sea surface temperatures contributed to July’s heat record. NASA’s analysis shows especially warm ocean temperatures in the eastern tropical Pacific, evidence of the El Niño phenomenon that began to develop in May 2023. Events such as El Niño or La Niña, which warm or cool the tropical Pacific Ocean, they may contribute to a small extent to the interannual variability of global temperatures. However, these contributions are not usually noticed when El Niño begins to develop in the northern hemisphere summer. NASA estimates that the greatest impacts of El Niño will be seen in February, March and April of 2024. (Source: NASA)
#July #hottest #July #record