The slow disappearance of the habitat because of decreasing sea ice hockey is cutting short time bears have for hunting ponds, scientists said in a report published in Nature Climate Change on Monday.
“The bears confront a longer fasting interval before the ice refreezes and they could head out to nourish,” Steven Amstrup, chief scientist of Polar Bears International who created the analysis, told AFP.
The carnivores, which reside in Arctic areas where temperatures can fall as low as -40°C in winter months, can quickly for months, particularly during the summertime when the ice melts each year.
However, with global warming, the time frame without ice hockey is lasting longer and more. Not able to locate an alternate food supply to seals, an increasing number of hungry bears are moving farther from their regular lands, nearer to inhabited regions.
According to present trends, polar bears at 12 of 13 subpopulations analyzed will have been decimated within 80 years from the galloping rate of change in the Arctic, which is warming twice as fast as the entire world as a whole, the analysis found
There was insufficient information for others to decide their fates.
“By estimating thin and fat polar bears could function, and modeling their power usage, we could figure out the threshold amount of times that polar bears could quickly prior to the cub and adult survival rates start to decrease,” said lead author Peter Molnar, a professor in the University of Toronto.
Females are worst-affected from the occurrence as they move into their dens in fall prepared to give birth in mid-winter and emerge in the spring with their cubs, according to the study.
“They need to then catch enough seals to keep enough fat and create enough milk to nourish their cubs during their summer quickly,” explained Amstrup.
By 2100, fresh births”will likely be badly compromised or hopeless everywhere except maybe from the Queen Elizabeth Island subpopulation,” at Canada’s the Arctic Archipelago, he further added.
The situation in the analysis forecasts the average surface temperature of the ground rising 3.3°C over the preindustrial standard — 1°C of heating so far has generated heatwaves and droughts one of other such all-natural events.
Scientists paint a gloomy picture when we continue down the same route and even when we can cap global warming at 2.4°C, that can be 0.5°C above objects outlined at the Paris Agreement but stays ambitious, this could likely only save to postpone that the polar bears’ passing.
“The only means to save them would be to safeguard their habitat by stopping global warming,” stated Amstrup.
“If by magical, sea ice can be preserved even as temperatures increase, polar bears may be OK.
“The dilemma is that their habitat is pumped.”