{"id":33730,"date":"2025-01-31T08:42:34","date_gmt":"2025-01-31T07:42:34","guid":{"rendered":"https:\/\/www.co2news.sk\/?p=33730"},"modified":"2025-01-31T08:43:09","modified_gmt":"2025-01-31T07:43:09","slug":"coastal-supra-permafrost-aquifers-of-the-arctic-and-their-significant-groundwater-carbon-and-nitrogen-fluxes","status":"publish","type":"post","link":"https:\/\/www.co2news.sk\/en\/2025\/01\/31\/coastal-supra-permafrost-aquifers-of-the-arctic-and-their-significant-groundwater-carbon-and-nitrogen-fluxes\/","title":{"rendered":"Coastal supra-permafrost aquifers of the Arctic and their significant groundwater, carbon and nitrogen fluxes"},"content":{"rendered":"<p style=\"text-align: left;\"><a href=\"https:\/\/agupubs.onlinelibrary.wiley.com\/doi\/pdfdirect\/10.1029\/2024GL109142?download=true\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #0000ff;\">Document<\/span><\/a> deals with <strong>research into groundwater inflow into Arctic coastal waters<\/strong> and its impact on biogeochemical processes. The study focuses on <strong>fresh subsea groundwater discharge (FSGD)<\/strong> <!--more-->and its organic carbon and nitrogen content at two locations on the Beaufort Sea coast of Alaska: <strong>Simpson Lagoon (SL)<\/strong> with a shallow ice layer and <strong>Kaktovik Lagoon (KL)<\/strong> with a deep ice layer.<\/p>\n<p>Main findings:<\/p>\n<ul>\n<li><strong>FSGD is a significant source of freshwater and dissolved substances in the Arctic<\/strong>During the summer, the inflow of the FSGD is comparable to the inflow from rivers, with <strong>higher organic carbon and nitrogen content<\/strong>.<\/li>\n<li><strong>Dissolved organic carbon (DOC) and nitrogen (DON) concentrations in fresh groundwater are high<\/strong>In SL, DOC and DON concentrations are almost double compared to KL.<\/li>\n<li><strong>Groundwater has a high carbon dioxide (CO2) content<\/strong>, which may have the effect of coastal waters becoming a source of CO2 to the atmosphere and causing acidification.<\/li>\n<li>The study found that <strong>the amount of FSGD varies between locations<\/strong> depending on permafrost depth and hydraulic conditions. KL has a higher FSGD than SL. The overall estimate for the Alaskan Beaufort Sea coast is 5.7 \u00d7 10^6 m3 per day.<\/li>\n<li><strong>The FSGD flow is comparable to the inflow from rivers in summer<\/strong>, representing 3-7% of combined summer river flow, but may carry more organic material.<\/li>\n<li><strong>Modeling and field observations<\/strong> confirm the presence of subterranean estuaries (STEs) in Arctic lagoons.<\/li>\n<li>The methods used included <strong>field measurements, groundwater sample analysis, electrical resistivity tomography (ERI)<\/strong> a <strong>numerical modeling<\/strong>.<\/li>\n<li>The study confirms that <strong>coastal Arctic aquifers can supply as much or more FSGD than coastal aquifers at lower latitudes<\/strong>.<\/li>\n<li>The findings point to <strong>the importance of SGD in the transport of organic matter, inorganic carbon and other dissolved substances into Arctic lagoons<\/strong>.<\/li>\n<li>The study assumes that <strong>groundwater inflow is becoming increasingly important compared to inflow from rivers<\/strong>.<\/li>\n<li>The data and models obtained are <strong>publicly available<\/strong>.<\/li>\n<\/ul>\n<p>This study highlights the importance of understanding Arctic groundwater and its impact on coastal ecosystems, particularly in the context of warming and permafrost thaw. Increased FSGD inflow due to warming could have significant impacts on biogeochemical cycles and marine food webs. <em><strong>Spring<\/strong><\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>The paper investigates groundwater inflow into Arctic coastal waters and its impact on biogeochemical processes. The study focuses on fresh subsea groundwater discharge (FSGD)<\/p>","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-33730","post","type-post","status-publish","format-standard","hentry","category-klimaticka-zmena"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/posts\/33730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/comments?post=33730"}],"version-history":[{"count":0,"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/posts\/33730\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/media?parent=33730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/categories?post=33730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.co2news.sk\/en\/wp-json\/wp\/v2\/tags?post=33730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}