Misleading: Polar Bear populations have increased.

Context

Claims that polar bear populations have increased have been circulating on social media platforms. These claims are not new and resurface in climate change denial discourse every few years. The claim suggests that climate change is either a hoax or not as severe as it is reported.

The recent discussion on the topic gained traction on Twitter after climate skeptic Bjorn Lomberg posted a tweet claiming "Polar bears used to be the poster child of climate change. But their numbers have been increasing: from 5-10k #polarbears in the 1960s, up to around 26k today." The tweet also linked to an article by Lomberg in the Financial Post.

In Fact

The claim that the polar bear population has increased is based on figures from sources such as the nternational Union for the Conservation of Nature (UCN) Polar Bear Specialists Group. However, these figures are not necessarily an indication that the polar bear population has increased globally. Andrew Derocher, a biological sciences professor at the University of Alberta, said to Politifact that many of the polar bear populations have never had a population estimate and lack trend data, making it impossible to know precisely what the global population was in the past, and what it is today. Steven Amstrup, chief scientist at the conservation group Polar Bears nternational, told AFP and Factcheck.org that there is no evidence that the global number of polar bears has increased and that past estimates are not reliable. 

Furthermore, a WWF article on the polar bear population, based on data from the UCN, states that four populations are in decline, with two increasing, and five stable. Additionally, eight populations lack substantial data. Therefore, data suggesting polar bear populations have increased is lacking, and even if this is true, according to the WWF, other populations are in decline.

Global warming is still considered a threat to polar bears, as global temperatures increasing will melt the sea ice that polar bears inhabit. Charles Greene, a senior fellow at Friday Harbor Laboratories, told PolitiFact that the loss of sea ice has impacted polar bears but not drastically so far, with some populations seeing no change. However, despite climate change having a potentially small impact so far, an increasing trend in global warming is a concern. Amstrup sees the issue as a bigger concern, informing factcheck.org that if temperatures don't stop rising, there won't be enough sea ice for the bears to survive. Furthermore, the WWF stated that in the coming decades, the sea ice in Northeast Canada and Northern Greenland will see significant loss with potentially serious consequences for polar bears. They also state that polar bears are projected to decline by 30 percent by 2050 if sea ice continues to melt. 

The Verdict

There is no reliable data on the potential increase in polar bear populations due to a lack of a sufficient population estimate. Global warming continues to be a threat to polar bear populations. Therefore, we have marked this claim as misleading.