Climate Wire | As the world warms, Arctic sea ice is rapidly disappearing, opening up potential new shipping routes across the world’s tops. But there are pitfalls. Less ice means more fog, making it more difficult and dangerous for ships to navigate thawing seas.
It’s an overlooked climate trade-off, according to new research. Also, while the new Northern Sea Route is often touted as a faster alternative to the traditional route through the Panama and Suez Canals, fog conditions can cause delays.
Studies suggest that fog on the Northwest Passage, which meanders through the Canadian archipelago, could delay projected shipping times by up to three days in the next few years. It can also increase the chances of collisions with floating icebergs.
It’s a risk decision makers should consider when designing new transportation routes, the researchers suggest. By staying away from the most foggy areas, you can save a little time and reduce the risk of accidents.
“The future of shipping in the Arctic Ocean is unknown, but fog could pose a major challenge,” Xianyao Chen, a physical oceanographer at Ocean University of China and co-author of the study, said in a statement. I’m here. “The effects of fog must be considered when designing routes across the North Pole.”
This study provides an overview of a simple natural phenomenon. When sea ice melts, the sea surface is exposed to the atmosphere. Air and water exchange heat and moisture, creating fog in the air.
Fog is often the thickest in newly formed patches of open water near the edge of the ice. Also, as Arctic sea ice continues to melt, fog is likely to form in newly expanded open oceans.
Researchers used historical data on Arctic fog conditions combined with model simulations to investigate how these conditions might affect future transportation routes. They explored both the Northwest Passage and the Northern Sea Route, which runs along the Russian coastline. As more ice melts, both shipping lanes become increasingly navigable, opening up the potential for expanded trade routes.
But fog may already be slowing navigation times through both the Northwest Passage and the Northern Sea Route, according to the study. And that will cause further delays in the decades to come.
Fog could increase shipping times across the Northwest Passage by more than 25%, or about one-third, in moderate future climate scenarios with a global temperature rise of 3°C by the end of the century. is known from research. day to day. This is close to the amount of warming scientists expect by the end of the century unless humanity rapidly ramps up efforts to reduce global greenhouse gas emissions.
The impact is less severe on the Northern Sea Route, where delays are likely to average less than a day.
This means that many of the current forecasts for the Northern Sea Route, which generally do not account for increased fog, “could be too optimistic” in terms of the time and money that could be saved, he said. Research suggests.
Currently, most Northern Sea Route designs involve ships clinging to the edge of the ice as they navigate the ocean. The study suggests that these are likely to be some of the most foggy locations, and ships could take a little detour to reduce risk and perhaps save a day or so. be.
At the same time, transportation considerations are just one of the side effects of Arctic climate change. The Arctic is one of the fastest warming regions on Earth, with temperatures rising about three times faster than the global average, and is already facing multiple impacts.
As the ice disappears, the region’s delicate marine ecosystem is changing. Many creatures, including polar bears, rely on Arctic sea ice, which uses the ice as a hunting platform.
As sea ice melts, the sea surface is able to absorb more heat from the atmosphere, increasing the rate of warming across the Arctic. Research also shows that rapid warming in the Arctic is changing the atmosphere, which may affect weather patterns in other parts of the world, such as Europe and North America.
Most of the Arctic Ocean now remains frozen year-round. But as sea ice dwindles, scientists warn that the Arctic will likely begin experiencing ice-free summers within decades, by the 2030s.
Reprinted from E&E News with permission of POLITICO, LLC. Copyright 2023. E&E News provides essential news for energy and environmental professionals.
