There is a direct impact of human activity on climate change, manifested in sea surface temperature rise (Shutterstock)
Marine and ocean scientists and centers for research and monitoring of marine environments expressed their concern about the accelerating rise in temperatures, after data previously analyzed by the Climate Change Institute at the University of Maine showed that sea surface temperatures recorded daily exceeded the records for their highest rise since 1982. Due to the climate changes that the world has witnessed,
Subsequent studies have shown that there is a direct effect of human activity on climate change, manifested in sea surface temperature rise, and specifically the effect of activities related to greatly increasing carbon dioxide emissions in widening the seasonal cycle of sea surface temperatures.
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The term "sea surface temperature" means the temperature of any physical body located at the surface, which is usually attributed to sea level. When measuring the temperature of water at the surface of the oceans, the surface temperature is designated as “sea surface temperature.”
The seasonal cycle of sea surface temperatures is increasing, with summer warming becoming more pronounced than winter warming (Shutterstock)
Human footprint
In a new study conducted by a team of researchers from the Woods Hole Oceanographic Institution, the study provided clear evidence of the existence of a human “imprint” on climate change that changed the amplitude of the seasonal cycle of sea surface temperatures.
“There is a signal of human-induced climate change in ocean temperatures associated with increased carbon dioxide,” says the study, published in the journal Nature Climate Change.
According to the statement issued by the Woods Hole Oceanographic Institution, the change in the amplitude of the seasonal cycle of sea surface temperatures is one of the most prominent indicators of the seriousness of the environmental situation in the world’s oceans.
“Changes in sea surface temperatures are evidence of human-induced climate change, as they are linked to increased carbon dioxide and are caused by human activities,” says study co-author Benjamin Santer, a researcher in the Department of Physical Oceanography at Woods Hole Oceanographic Institution.
On the other hand, the Woods Hole Oceanographic Institution statement says: The study was motivated by previous work by a working group led by researcher Benjamin Santer, who has worked in the field of human climate fingerprints for more than 30 years.
Previous studies have used satellite records to identify human fingerprints in changing the seasonal cycle of tropospheric temperature from middle to upper. However, this is the first human fingerprinting study to reveal detailed patterns of climate change in seasonal sea surface temperatures.
Study: Humans were the main cause of changes in sea surface temperature (Shutterstock)
Study results: The cause is humans
According to a Woods Hole Oceanographic Institution statement, the study used four different sets of observational data, including satellite records and measurements from ships and buoys dating back to 1950.
Analysis of this comprehensive data across all sources revealed signs of a strong human influence on seasonal sea surface temperature variations.
Study co-researcher Benjamin Santer says: “All of this data provided the same conclusions indicating that humans were the main cause of changes in sea surface temperature.”
Simulations with historical changes in individual forcing also reaffirmed that greenhouse gas increases are the main driver of changes in underground air conditioning, and are an effect of anthropogenic aerosols.
The study also showed that there is an increase in the amplitude of the seasonal cycle at mid-latitudes in the Northern Hemisphere, and this is particularly evident in the Northern Hemisphere, where ocean basin sizes are smaller than the Southern Hemisphere, and where changes in sea surface temperatures are greatly affected. Wind patterns associated with atmospheric warming.
Here, the lead researcher in the study, Dr. Jia Rui Shi, believes that the expansion of the seasonal cycle of sea surface temperatures is increasing, with the rise in summer temperature becoming more pronounced than the rise in winter temperature, and thus the implications of this human-induced change in ocean temperatures long term.
“This strong human imprint on the seasonal cycle of ocean surface temperature is expected to have widespread impacts on marine ecosystems, and could significantly impact fisheries and nutrient distribution,” says Rui Shi. Seasonality has scientific, economic and social importance.”
He adds, "The results of this study refute the claims that recent temperature changes are natural, whether due to the sun or due to internal cycles in the climate system, and a natural explanation is almost impossible in relation to what we are looking at here (i.e. changes in seasonal sea surface temperatures)." The study also dismisses the claim that we do not need to take climate change seriously because it is natural.
On the other hand, the Woods Hole Oceanographic Institution statement said: This study is a compelling call to action, emphasizing the need for policy decisions to be informed by scientific understanding of human impacts on climate and the urgent need to address climate change globally.
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