An Egyptian farmer checks his phone as he cools off his horse, as a boy swims in the River Nile, during a heat wave in Giza, Egypt, on July 24, 2015. A new study said that summer will be two months longer by the end of the century than it is now.
Amr Nabil, AP

Summer is already a beastly hot, four-month slog for folks in the eastern Mediterranean. And now a new study says that by 2100, the region's hot season will be two full months longer, thanks to global warming.

"Our research shows that the climate changes we are all noticing today are likely to intensify in the coming decades," said Assaf Hochman of Tel Aviv University, who led the research. 

Winter, which is the region's rainy season, will shorten to just two months, the study said. The research was based on climate models and said an expected rise in greenhouse gases would be the main reason for the seasonal changes.

The countries most impacted by the extended summer include Israel, Egypt, Jordan, Syria, Lebanon and southern Turkey. 

Not surprisingly, scorching heat is one of the most expected outcomes of man-made climate change, according to a 2016 report from the National Academy of Sciences and a 2015 study in Nature Climate Change.

The 2015 study, which examined heat waves in the Persian Gulf area, said that the extreme heat that might occur 1 out of 20 days there now will be the normal summer day of 2070 and beyond.

Referencing the Tel Aviv University study, which was released Wednesday, Hochman said that "the conclusions were disturbing. Pending no significant change in current human behavior in the region, the summer is expected to extend by 25% by the middle of the century and by 49% until its end."

"The combination of a shorter rainy season and a longer dry season may cause a major water problem in Israel and neighboring countries," he concluded.

The study was published in the peer-reviewed International Journal of Climatology, a publication of the Royal Meteorological Society.