Scientists warn that the ocean is starting to lose its memories.

An anonymous reader cites ScienceAlert’s report. The sea around us is changing. As our climate changes, so does the world’s water. Not only the temperature of the ocean, but also its structure, currents, and even its color are anomalies. As these changes emerge, the generally stable marine environment becomes more unpredictable and erratic, and in some ways the Like the sea that loses its memories, scientists suggest. In a new paper led by Hui Shi, a climate researcher and first author at the Farallon Institute in Petaluma, California, the researchers say, “Ocean memory, the persistence of ocean conditions, is a major source of predictability of the climate system beyond meteorological time scales.” explain. “We show that ocean memory, as measured by the annual persistence of sea surface temperature anomalies, is projected to decline steadily globally over the next few decades.”

In this study, the team studied the sea surface temperature (SST) of a shallow sea surface layer called the upper mixed layer (MLD). Despite the relative shallowness of the MLD (extending only to a depth of about 50 m at sea level), this upper layer of water exhibits a lot of persistence over time, especially in terms of thermal inertia compared to the changes seen in the atmosphere. above. In the future, however, modeling suggests that the ‘memory’ effect of thermal inertia in the upper ocean will decrease globally over the rest of the century, with dramatically larger changes in temperature predicted over the next few decades.

According to the researchers, the shoaling effect of MLD will introduce a higher level of water mixing in the upper ocean, effectively thinning the upper layer. This is expected to lower the ocean’s capacity to thermal inertia, making the upper ocean more vulnerable to arbitrary temperature anomalies. It’s not clear what that means for marine wildlife, but the researchers note that while some species are expected to outperform others in terms of adaptation, “there is likely to have consequential effects on populations”. On the other hand, declining ocean memory makes it significantly more difficult for scientists to predict upcoming ocean dynamics and is expected to reduce reliable lead times for all kinds of predictions related to SST. This will impede our ability to predict monsoons, ocean heat waves (MHW) and extreme weather periods, among other things. The research results are Published in the journal Science Advances.

Scientists warn that the ocean is starting to lose its memories.

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