https://www.westarctica.wiki/index.php?title=Lake_Mercer&feed=atom&action=historyLake Mercer - Revision history2024-03-28T11:42:33ZRevision history for this page on the wikiMediaWiki 1.36.2https://www.westarctica.wiki/index.php?title=Lake_Mercer&diff=8394&oldid=prevBaron of Bastanchury at 09:46, 27 March 20202020-03-27T09:46:53Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Mercer-Drill-Hole.jpg|350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Mercer-Drill-Hole.jpg|350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer]]</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'''Lake Mercer''' is a <del style="font-weight: bold; text-decoration: none;">subglacial </del>lake in [[Westarctica]] covered by a sheet of <del style="font-weight: bold; text-decoration: none;">[[</del>ice<del style="font-weight: bold; text-decoration: none;">]] </del>1,067 meters (3,501 feet) thick; the water below is hydraulically active, with water replacement times on the order of a decade from the [[Ross Sea]].</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Subglacial]] </ins>'''Lake Mercer''' is a lake in [[Westarctica]]<ins style="font-weight: bold; text-decoration: none;">. It has no surface area, and is </ins>covered by a sheet of ice 1,067 meters (3,501 feet) thick; the water below is hydraulically active, with water replacement times on the order of a decade from the [[Ross Sea]].</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Lake Mercer is identified as high risk for a collapse of the [[West Antarctic Ice Sheet]] caused by [[global warming]]. Studies suggest that Mercer Lake as well as other subglacial lakes appear to be linked, with drainage events in one reservoir causing filling and follow-on drainage in adjacent lakes.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Lake Mercer is identified as high risk for a collapse of the [[West Antarctic Ice Sheet]] caused by [[global warming]]. Studies suggest that Mercer Lake as well as other subglacial lakes appear to be linked, with drainage events in one reservoir causing filling and follow-on drainage in adjacent lakes.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Exploration==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Exploration==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Helen Amanda Fricker from the Scripps Institution of Oceanography discovered <del style="font-weight: bold; text-decoration: none;">subglacial Lake Mercer </del>by accident in 2007<del style="font-weight: bold; text-decoration: none;">, </del>while using satellite radar soundings to search for the grounding line of a [[glacier]]. On 28 December 2018, the Subglacial Antarctic Lakes Scientific Access (SALSA) team, where Fricker serves on the executive committee of the project, announced they had reached Mercer <del style="font-weight: bold; text-decoration: none;">Lake </del>after two days of melting their way through <del style="font-weight: bold; text-decoration: none;">1,067 m (3,501 ft) of </del>ice with a high-pressure hot-water drill.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Helen Amanda Fricker from the Scripps Institution of Oceanography discovered <ins style="font-weight: bold; text-decoration: none;">the lake </ins>by accident in 2007 while using satellite radar soundings to search for the grounding line of a <ins style="font-weight: bold; text-decoration: none;">nearby </ins>[[glacier]]. On 28 December 2018, the Subglacial Antarctic Lakes Scientific Access (SALSA) team, where Fricker serves on the executive committee of the project, announced they had reached <ins style="font-weight: bold; text-decoration: none;">Lake </ins>Mercer after two days of melting their way through <ins style="font-weight: bold; text-decoration: none;">the </ins>ice with a high-pressure hot-water drill.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Discovery of ancient life==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Discovery of ancient life==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A preliminary report states that ancient carcasses of crustaceans and a tardigrade were isolated from the sediment samples. The <del style="font-weight: bold; text-decoration: none;">lake water </del>samples <del style="font-weight: bold; text-decoration: none;">contains </del>enough oxygen to support aquatic animals, and bacteria are present with a density of at least 10,000 cells per milliliter. Other ancient <del style="font-weight: bold; text-decoration: none;">organisms </del>retrieved from the sediments include shells of diatoms (a photosynthetic algae) and thread-like plants or fungi. How the crustaceans and tardigrade reached <del style="font-weight: bold; text-decoration: none;">Lake Mercer </del>is a matter of debate, but the scientists suspect that the gradual uplift of the continent transformed shallow ocean bays into isolated lakes. The team <del style="font-weight: bold; text-decoration: none;">will attempt </del>to establish the age of the animal remains using radiocarbon dating, and will also try to sequence DNA from crustaceans to find out whether they belong to marine or freshwater species.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A preliminary report <ins style="font-weight: bold; text-decoration: none;">on the lake </ins>states that ancient carcasses of crustaceans and a tardigrade were isolated from the sediment samples. The samples <ins style="font-weight: bold; text-decoration: none;">contain </ins>enough oxygen to support aquatic animals, and bacteria are present with a density of at least 10,000 cells per milliliter. Other ancient <ins style="font-weight: bold; text-decoration: none;">materials </ins>retrieved from the sediments include shells of diatoms (a photosynthetic algae) and thread-like plants or fungi. How the crustaceans and tardigrade reached <ins style="font-weight: bold; text-decoration: none;">the lake </ins>is a matter of debate, but the scientists suspect that the gradual uplift of the <ins style="font-weight: bold; text-decoration: none;">Antarctic </ins>continent transformed shallow ocean bays into isolated lakes. The team <ins style="font-weight: bold; text-decoration: none;">plans </ins>to establish the age of the animal remains using radiocarbon dating, and will also try to sequence DNA from crustaceans to find out whether they belong to marine or freshwater species.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The sediment cores will also be analyzed by geobiologists to study how relic organic matter deposited during marine incursions influences contemporary biodiversity and carbon cycling.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The sediment cores will also be analyzed by geobiologists to study how relic organic matter deposited during marine incursions influences contemporary biodiversity and carbon cycling.</div></td></tr>
</table>Baron of Bastanchuryhttps://www.westarctica.wiki/index.php?title=Lake_Mercer&diff=8384&oldid=prevWestarctica at 03:09, 25 March 20202020-03-25T03:09:12Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The sediment cores will also be analyzed by geobiologists to study how relic organic matter deposited during marine incursions influences contemporary biodiversity and carbon cycling.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The sediment cores will also be analyzed by geobiologists to study how relic organic matter deposited during marine incursions influences contemporary biodiversity and carbon cycling.</div></td></tr>
<tr><td colspan="2"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==Peerage title==</ins></div></td></tr>
<tr><td colspan="2"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">On 22 March 2020, David Toalster was granted the title Baron Mercer, named in honor of this lake.</ins></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category: Geography of Westarctica]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category: Geography of Westarctica]]</div></td></tr>
</table>Westarcticahttps://www.westarctica.wiki/index.php?title=Lake_Mercer&diff=6267&oldid=prevWestarctica at 07:53, 21 January 20192019-01-21T07:53:23Z<p></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Mercer-Drill-Hole.jpg|350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Mercer-Drill-Hole.jpg|350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer]]</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'''Lake Mercer''' is a subglacial lake in [[Westarctica]]covered by a sheet of ice 1,067 meters (3,501 feet) thick; the water below is hydraulically active, with water replacement times on the order of a decade from the [[Ross Sea]].</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>'''Lake Mercer''' is a subglacial lake in [[Westarctica]] covered by a sheet of <ins style="font-weight: bold; text-decoration: none;">[[</ins>ice<ins style="font-weight: bold; text-decoration: none;">]] </ins>1,067 meters (3,501 feet) thick; the water below is hydraulically active, with water replacement times on the order of a decade from the [[Ross Sea]].</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Lake Mercer is identified as high risk for a collapse of the [[West Antarctic Ice Sheet]] caused by [[global warming]]. Studies suggest that Mercer Lake as well as other subglacial lakes appear to be linked, with drainage events in one reservoir causing filling and follow-on drainage in adjacent lakes.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Lake Mercer is identified as high risk for a collapse of the [[West Antarctic Ice Sheet]] caused by [[global warming]]. Studies suggest that Mercer Lake as well as other subglacial lakes appear to be linked, with drainage events in one reservoir causing filling and follow-on drainage in adjacent lakes.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Exploration==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Exploration==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Helen Amanda Fricker from the Scripps Institution of Oceanography discovered subglacial Lake Mercer by accident in 2007, while using satellite radar soundings to search for the grounding line of a glacier. On 28 December 2018, the Subglacial Antarctic Lakes Scientific Access (SALSA) team, where Fricker serves on the executive committee of the project, announced they had reached Mercer Lake after two days of melting their way through 1,067 m (3,501 ft) of ice with a high-pressure hot-water drill.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Helen Amanda Fricker from the Scripps Institution of Oceanography discovered subglacial Lake Mercer by accident in 2007, while using satellite radar soundings to search for the grounding line of a <ins style="font-weight: bold; text-decoration: none;">[[</ins>glacier<ins style="font-weight: bold; text-decoration: none;">]]</ins>. On 28 December 2018, the Subglacial Antarctic Lakes Scientific Access (SALSA) team, where Fricker serves on the executive committee of the project, announced they had reached Mercer Lake after two days of melting their way through 1,067 m (3,501 ft) of ice with a high-pressure hot-water drill.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Discovery of ancient life==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Discovery of ancient life==</div></td></tr>
</table>Westarcticahttps://www.westarctica.wiki/index.php?title=Lake_Mercer&diff=6265&oldid=prevWestarctica: Created page with "Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer '''Lake Mercer''' is a subglacial lake in Westarctica..."2019-01-20T21:13:47Z<p>Created page with "<a href="/index.php?title=File:Mercer-Drill-Hole.jpg" title="File:Mercer-Drill-Hole.jpg">350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer</a> '''Lake Mercer''' is a subglacial lake in <a href="/index.php?title=Westarctica" title="Westarctica">Westarctica</a>..."</p>
<p><b>New page</b></p><div>[[File:Mercer-Drill-Hole.jpg|350px|thumb|Drill hole created by SALSA scientists to penetrate subglacial Lake Mercer]]<br />
'''Lake Mercer''' is a subglacial lake in [[Westarctica]]covered by a sheet of ice 1,067 meters (3,501 feet) thick; the water below is hydraulically active, with water replacement times on the order of a decade from the [[Ross Sea]].<br />
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Lake Mercer is identified as high risk for a collapse of the [[West Antarctic Ice Sheet]] caused by [[global warming]]. Studies suggest that Mercer Lake as well as other subglacial lakes appear to be linked, with drainage events in one reservoir causing filling and follow-on drainage in adjacent lakes.<br />
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==Exploration==<br />
Helen Amanda Fricker from the Scripps Institution of Oceanography discovered subglacial Lake Mercer by accident in 2007, while using satellite radar soundings to search for the grounding line of a glacier. On 28 December 2018, the Subglacial Antarctic Lakes Scientific Access (SALSA) team, where Fricker serves on the executive committee of the project, announced they had reached Mercer Lake after two days of melting their way through 1,067 m (3,501 ft) of ice with a high-pressure hot-water drill.<br />
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==Discovery of ancient life==<br />
A preliminary report states that ancient carcasses of crustaceans and a tardigrade were isolated from the sediment samples. The lake water samples contains enough oxygen to support aquatic animals, and bacteria are present with a density of at least 10,000 cells per milliliter. Other ancient organisms retrieved from the sediments include shells of diatoms (a photosynthetic algae) and thread-like plants or fungi. How the crustaceans and tardigrade reached Lake Mercer is a matter of debate, but the scientists suspect that the gradual uplift of the continent transformed shallow ocean bays into isolated lakes. The team will attempt to establish the age of the animal remains using radiocarbon dating, and will also try to sequence DNA from crustaceans to find out whether they belong to marine or freshwater species.<br />
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The sediment cores will also be analyzed by geobiologists to study how relic organic matter deposited during marine incursions influences contemporary biodiversity and carbon cycling.<br />
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[[Category: Science]]<br />
[[Category: Geography of Westarctica]]</div>Westarctica