Köppen-Geiger climate classification system classifies its climate as hot desrt (BWh), but blowing winds from the Mediterranean Sea greatly moderate the temperatures, typical to the Egypt's north coast, making its summers moderately hot and humid while its winters mild and moderately wet when sleet and hail are also common.
Since the threshold values of semi-aridity here (100–200 to 600 mm) are clearly lower than in the Köppen climate classification (390 to 780 mm for stations with mean annual temperature of 25°C and dry season centered in "winter", and even 440 to 880 mm at 30°C), the tropical semi-arid Sahelian climate, incidentally the hottest climate on Earth, is on the borderline of Köppen's hot semi-arid climates (BSh) and Köppen's hot arid climates (BWh).
The technique for producing STAP cells was developed by Haruko Obokata at the Brigham and Women's Hospital (BWH), while she was studying under Charles Vacanti, and then at the RIKEN Center for Developmental Biology in Japan.