One study shows that 400 years ago, extreme rainfall in Arabia was five times what it is today, while the last 2,000 years have seen significantly more rainfall. Researchers used deep-sea sediment cores to reconstruct rainfall patterns and warned there are risks in assuming long-term climate stability. As urbanization accelerates, experts emphasize the need to be prepared for disasters as floods and droughts become increasingly severe.
As urbanization increases in the Middle East, significant changes in late Holocene rainfall must be taken into account when developing flood control plans and predicting future hydroclimatic changes.
A new study reconstructing extreme rainfall patterns in the Arabian region shows that rainfall in the region 400 years ago was five times more intense than it is now. These findings underscore the need for climate preparedness as urbanization accelerates.
The study, led by researchers at the University of Miami's Rosenstiel School of Oceanic, Atmospheric and Earth Sciences, shows that the climate over the past 2,000 years has been significantly wetter. During this period, Arabia's climate resembled a lush savanna, home to lions, leopards and wolves - a far cry from the bone-dry deserts of today. The research was published in Science Advances on February 21.
The team used a remotely operated vehicle (ROV) deployed from the research vessel OceanXplorer at a depth of more than a mile to extract sediment cores from a deep-sea saltwater pool in the Gulf of Aqaba, a northern stretch of the Red Sea. The chemistry of the brine preserves undisturbed sedimentary layers, providing a unique and highly accurate record of late Holocene rainfall trends.
They found that the past 2,000 years in Arabia were much wetter. The region was once a lush savannah and received twice as much rainfall about 200 years ago.
This is an important record in the climate history of the Middle East. Amy Clement, a professor in the Department of Atmospheric Sciences at the University of Miami's Rosenstiel School, said: "It tells us that the climate in this region, whether it is average climate or extreme climate, will undergo huge changes, and the assumption of long-term climate stability is not advisable in future development."
The Middle East is considered a climate hotspot, and in the Arab region, flash floods caused by heavy winter rains are increasingly compounded by harsh droughts, causing widespread chaos and humanitarian disaster. The variability of late Holocene rainfall highlights the need for better protection against flash floods and droughts and an understanding of future hydroclimatic trends as the Middle East rapidly urbanizes. Catastrophic flooding across the Arabian Peninsula in winter 2024 highlights the urgency of studying the frequency and triggers of such extreme weather events.
Mattie Rodrigue, director of Ocean Explorer's science program, said: "Using the technology on Ocean Explorer, combined with multidisciplinary experts in ocean and climate science, we can further understand the connections between ocean systems and long-term weather and climate trends, helping high-risk areas prepare for the future."
Compiled from /ScitechDaily