News & Stories

Tropical marine low clouds play a crucial role in regulating Earth’s climate. However, whether they mitigate or exacerbate global warming has long remained a mystery. Now, researchers from the School of Engineering at the Hong Kong University of Science and Technology (HKUST) have developed a groundbreaking method that significantly improves accuracy in climate predictions. This led to a major discovery – that tropical cloud feedback may have amplified the greenhouse effect by a staggering 71% more than previously known to scientists. The effects of tropical low clouds are difficult to investigate because they are influenced by a variety of factors. Commonly used low cloud controlling factors often struggle to separate the influence of local sea surface temperatures (SSTs) from that of temperatures in the free troposphere – the lowest layer of Earth’s atmosphere, casting uncertainty in projections.

    In April to May 2019, the coral reefs near the French Polynesian island of Moorea in the central South Pacific Ocean suffered severe and prolonged thermal bleaching. The catastrophe occurred despite the absence of El Niño conditions that year, intriguing ocean scientists around the world. 

HKUST researchers have unravelled the genomic riddles of the tubeworms that thrive deep in the ocean, paving the way for previously unthinkable biological applications.

An international research team led by the Hong Kong University of Science and Technology (HKUST) has demonstrated that cooling by internal waves could potentially create thermal refuges for coral reefs, and may help prevent and more accurate predict locations of coral bleaching. Coral reefs around the world are threatened by pan-tropical bleaching events caused by rising seawater temperatures linked to ongoing climate change and extreme conditions like El Niño.  However, bleaching patterns can be hard to predict, especially in deeper water.  Currently, most bleaching predictions are based on surface estimates of seawater temperatures gathered with satellites.  While satellite observations are important for understanding large-scale patterns and studying remote locations, they are only able to detect temperatures at the very surface of the ocean and provide averages over relatively large scales.