The Antarctic Sea Ice is again in record low territory, and Nobody knows why


What's happening to Arctic sea ice is pretty straightforward: ground is getting warmer, and everything is melting. But on the other side of the planet, these things are more complex, as evidenced by the latest Antarctic sea ice shell that has scientists scratching their heads.

Antarctica ranked in the new year with record-low sea ice levels, according to an update released Thursday through the National Snow and Ice Data Center (NSDIC). On January 1, sea ice covered a paltry 2.11 million square miles of water in the Southern Ocean reminding the continent, which is 726,000 square miles below the long-term average for the day. This bizarre start to the year 2019 followed the most fast-paced sea ice loss surge record on record, causing the Antarctic to eclipse record lows just two years ago, in the Australian summer of 2016-2017.

"Notably, the November-December 2016 season is considered an extreme stroll from Antarctic sea ice at the time," Nsandi wrote.

You might think: You are climate change. And that could be part of it! But an analysis led by the 2016-2017 Sea Ice Crash that culminated in a record seasonal sea ice minimum in March 2017-found that a spike of freak weather coincided with an extremely negative phase of the South Annular mode, where the westerly The winds circling the continent migrating north was to blame.

In short, scientists painted the last sea ice nosive on natural variability. But it is now unclear why behind this year's ice crash. Notably, the University of Washington Sea ice researcher Sicily Bites tells Earth that the Southern Annular mode is not strongly negative at this moment. Or are we still knocking the hangover from a monster in Nino, as we were at the end of 2016.

"I think we have to come back to the drawing board a little bit," bitters told Earth.

Bites were reluctant to speculate on how to overcome the further back-to-back sea ice slumps being part of a new trend associated with climate change. While the Antarctic parts are definitely the heat fever, until recently, the Antarctic sea ice is growing a bit, reaching a record high in 2014. That does not take over the warming trend, it simply speaks to the complexity of sea ice in an environment implied by Both ocean currents and a giant continent.

Sun Nuhime, an older research scientist at NASA's Jet Propulsion Laboratory, Tell Earth that everything from Winds driven by the Antarctic continental topography to currents controlled by the shape of the South Ocean safflower influences Antarctic sea ice. Beats pointed to ice melting on the continent's edges as a factor that can, paradoxically, help new sea ice form by preventing warmer deep waters from rising to surface. Snow fall can also employ year-to-year variability in ice, according to NASA.

"Another point of low sea ice in the Antarctic this year cannot be considered a climatic trend," Ergm wrote, saying that spots of record low occurred in the early part of the satellite record as well. .

If nothing else, the icy virus is sure to spur after research. NASA's recently launched ice-track satellite, ICESat-2, can be hand-held, given its ability to gauge the sea icy thickness, a key indicator of ice age and health.

Meanwhile, global sea ice cover continues to decline, with rapid losses in the Arctic far eclipse that's happening around the southern continent.

Source link