AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Antarctica iceberg breaking off effects9/27/2023 When an iceberg breaks from an ice shelf, an adjustment in the flow of ice into the ice shelf follows, which may influence the behavior of other cracks in the area and contribute to destabilization of the Brunt Ice Shelf over time. “This calving event has been expected and is part of the natural behavior of the Brunt Ice Shelf,” Glaciologist Dominic Hodgson said. Unlike the Larsen C Ice Shelf - which had extensive surface meltwater at the time of its collapse in 2017 - there is no evidence that climate change played a significant role in the changes with the Brunt Ice Shelf. When ice shelves like Larsen C are lost, it allows land-based ice to flow into the ocean more quickly, contributing to sea-level rise.įact check: Greenhouse gases are a driving factor in global warming, contrary to post GPS instruments surrounding the station take multiple daily measurements of the ice shelf and researchers' observations provide key information on atmospheric and space weather in a climate-sensitive zone. The BAS Halley Research Station, which relocated 14 miles inland of Chasm-1 a few years ago after it began to widen, was unaffected by the recent break off. With six Halley research stations on the Brunt Ice Shelf since 1956 – the calving event, although unexpected time-wise, has long been anticipated. A fissure scientists are keeping an eye on is the "Halloween crack," which was detected in October 2016.Scientists at British Antarctic Survey (BAS) who monitor the behavior of the ice shelf - the part of a land-based ice sheet that floats on the ocean - first observed this crack extending in 2012 after having been dormant for some decades, according to the European Space Agency. They will also continue keeping a close watch on the Brunt Ice Shelf. Now, experts will be monitoring the movement of the new iceberg, which the BAS believes will follow the path of iceberg A-74 that broke off in February 2021. The Halley station would have been in a "very dangerous position" if it wasn't moved, according to BBC News. It broke up on a calm day with locally mild weather, puzzling observers. B-15A was a large iceberg, about the size of Luxembourg, which had run aground off of the coast of Antarctica. It was relocated in 2016 as the chasm along which the break occurred widened and was reportedly not affected by Sunday's iceberg break-off. MacAyeal and his colleagues discovered the effect of these waves after an iceberg they were studying, named B-15A, abruptly shattered on October 27, 2005. The ice shelf is actually the location of the BAS' Halley Research Station, where scientists study space weather and atmospheric processes. "This calving event has been expected and is part of the natural behavior of the Brunt Ice Shelf," glaciologist Dominic Hodgson said in the BAS release. Iceberg calving events such as the one that happened Sunday are a part of a "natural, cyclical process" on ice sheets, NASA Earth observatory explained. ⬇️ #Copernicus #Sentinel3 □□□️ captured the first image this morning (24 January at 05:34 UTC) #Chasm1 /qsnjuEuzOM- Copernicus EU January 24, 2023 Yesterday, a □ #iceberg of the size of Greater London calved from the Brunt Ice Shelf in #Antartica □□ National Ice Center - clearly separated from the Brunt Ice Shelf. In an image shared by NASA Earth Observatory, one can see the iceberg - now dubbed A-81 by the U.S. The British Antarctic Survey (BAS) confirmed the break-off in a statement Monday, noting that this was already the second such major calving event in the area in the past two years. To put that into perspective, that's reportedly about the size of Greater London or twice the size of New York City. Late on Sunday, after years of wondering and waiting, the break finally happened, creating an iceberg of 1,550 square kilometers in size (660 square miles). The signs that an iceberg was just about ready to break off came in February 2019, according to NASA Earth Observatory. When glaciers melt, because that water is stored on land, the runoff significantly increases the amount of water in the ocean, contributing to global sea level rise. Icebergs are chunks of glacial ice that break off glaciers and fall into the ocean. Satellites captured a view of the broken off icebergĪn iceberg has broken off from the Brunt Ice Shelf in Antarctica, and satellites have captured the views of the massive piece. Sea ice forms and melts strictly in the ocean whereas glaciers are formed on land.
0 Comments
Read More
Leave a Reply. |