{"id":91787,"date":"2024-07-10T10:55:03","date_gmt":"2024-07-10T10:55:03","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/10\/microbes-in-the-arctic-may-be-releasing-more-climate-warming-gases\/"},"modified":"2024-07-10T10:55:03","modified_gmt":"2024-07-10T10:55:03","slug":"microbes-in-the-arctic-may-be-releasing-more-climate-warming-gases","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/10\/microbes-in-the-arctic-may-be-releasing-more-climate-warming-gases\/","title":{"rendered":"Microbes in the Arctic may be releasing more climate-warming gases"},"content":{"rendered":"<div style=\"text-align:center\"><img loading=\"lazy\" decoding=\"async\" width=\"592\" height=\"240\" src=\"https:\/\/i2.wp.com\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module-sm@2x.png?resize=592,240&amp;ssl=1\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Microbes in the Arctic may be releasing more climate-warming gases\" title=\"Microbes in the Arctic may be releasing more climate-warming gases\" \/><\/div><p> <br \/>\n<\/p>\n<div data-component=\"video-embed\">\n<p>Earth\u2019s <a href=\"https:\/\/www.snexplores.org\/article\/scientists-say-tundra\">tundra<\/a> is warming about four times faster than the rest of the planet. The rising fever in this Arctic ecosystem is boosting the production of carbon dioxide (CO<sub>2<\/sub>) by underground microbes, a new study suggests. If true, it could be setting up a feedback loop that leads to even more warming.<\/p>\n<p>Small shrubs, grasses and <a href=\"https:\/\/www.snexplores.org\/article\/when-fungi-and-algae-marry\">lichen<\/a> typically cover the tundra. Soils in these frigid lands also tend to be rich in organic carbon. Normally, the tundra is \u201ca sleepy biome,\u201d says Sybryn Maes. She\u2019s an environmental scientist who works at Ume\u00e5 University. That\u2019s in Sweden. But <a href=\"https:\/\/www.sciencenews.org\/article\/arctic-warming-faster-earth-climate-change\" rel=\"noopener\">warming will likely wake this sleeping giant<\/a>. And that could prompt soil microbes to release more CO<sub>2<\/sub>, a potent <a href=\"https:\/\/www.snexplores.org\/article\/explainer-co2-and-other-greenhouse-gases\">greenhouse gas<\/a>.<\/p>\n<p>So far, this trend has been hard to confirm in the wild. Maes\u2019 team decided to see if they could do it.<\/p>\n<aside class=\"wp-block-sciencenews-inline-related-post alignleft\">\n<h4><a href=\"https:\/\/www.snexplores.org\/article\/explainer-co2-and-other-greenhouse-gases\">Explainer: CO2 and other greenhouse gases<\/a><\/h4>\n<\/aside>\n<p>In all, some 70 scientists took measurements at 28 tundra sites across the globe. During the summer growing season, they placed clear, open-topped plastic chambers over patches of the ground. Each chamber was about a meter (39 inches) in diameter. These let in light and precipitation but blocked the wind. Summer temps inside the chambers were an average of 1.4 degrees Celsius (2.5 degrees Fahrenheit) warmer than at uncovered sites nearby.<\/p>\n<p>The researchers also measured the soil microbes\u2019 <a href=\"https:\/\/www.snexplores.org\/article\/scientists-say-respiration\">respiration<\/a> \u2014 how much CO<sub>2<\/sub> they spewed into the air. Then they compared these data to those from nearby uncovered patches of soil. Some data came from a single year. Elsewhere, teams collected data far longer \u2014 across up to 25 growing seasons.<\/p>\n<p>That 1.4 degree Celsius increase boosted respiration \u2014 a lot. It <a href=\"https:\/\/www.nature.com\/articles\/s41586-024-07274-7\" rel=\"noopener\">rose by almost one-third across the covered sites<\/a>. In all, the effects seemed fairly consistent with time, the researchers now conclude.<\/p>\n<p>They shared their findings in May in <em>Nature<\/em>.<\/p>\n<section class=\"newsletter-signup__wrapper___lZ0W1 wp-block-house-ads wp-block-newsletter-signup\">\n<picture><source srcset=\"https:\/\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module@1x.png 1x,&#10;&#9;&#9;&#9;&#9;https:\/\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module@2x.png 2x\" media=\"(min-width: 768px)\"><source srcset=\"https:\/\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module-sm@1x.png 1x,&#10;&#9;&#9;&#9;&#9;https:\/\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module-sm@2x.png 2x\"><\/source><\/source><\/picture>\n<div class=\"newsletter-signup__container___srNOL\" data-component=\"newsletter-signup\">\n<h3 class=\"newsletter-signup__heading___0EHmb\">\n\t\t\tEducators and Parents, Sign Up for The Cheat Sheet\t\t<\/h3>\n<div class=\"newsletter-signup__message___pemaq\">\n<p>Weekly updates to help you use <em>Science News Explores<\/em> in the learning environment<\/p>\n<\/p><\/div>\n<p class=\"newsletter-signup__thankyou___K6GGN\">Thank you for signing up!<\/p>\n<p class=\"newsletter-signup__error___hCsJI\">There was a problem signing you up.<\/p>\n<\/p><\/div>\n<\/section>\n<h2 class=\"wp-block-heading\">Some sites were more sensitive<\/h2>\n<p>The new data showed a lot of variability between sites. For instance, the CO\u2082 ramp-up was greatest where soils had the least nitrogen. Why? As soils warm, plants become more active. The plants need <a href=\"https:\/\/www.snexplores.org\/article\/explainer-fertilizing-power-n-and-p\">nitrogen<\/a>, a <a href=\"https:\/\/www.snexplores.org\/article\/scientists-say-nutrient\">nutrient<\/a>, to grow. Soil microbes tend to harvest that nitrogen for them. And where these microbes were really active, hunting to find and extract that nitrogen, they also spewed more CO<sub>2 <\/sub>into the air.<\/p>\n<p>These new findings provide the best evidence yet that warming boosts microbial activity and CO<sub>2 <\/sub>release, says Nicholas Bouskill. He\u2019s an environmental microbiologist at Lawrence Berkeley National Laboratory. That\u2019s in California. Previous studies looking at this had been much smaller. They also offered some contradictory findings (<a href=\"https:\/\/escholarship.org\/uc\/item\/03z552dh\" rel=\"noopener\">including one 2020 study by Bouskill\u2019s team<\/a>).<\/p>\n<p>The long-term question, Bouskill says, is: \u201cWill these areas become [CO<sub>2<\/sub>] sources?\u201d Or will they largely continue to store carbon?<\/p>\n<aside class=\"wp-block-sciencenews-inline-related-post alignleft\">\n<h4><a href=\"https:\/\/www.snexplores.org\/article\/lets-learn-about-the-arctic\">Let\u2019s learn about the Arctic<\/a><\/h4>\n<\/aside>\n<p>NASA estimates that <a href=\"https:\/\/www.snexplores.org\/article\/scientists-say-permafrost\">permafrost<\/a> in the Arctic <a href=\"https:\/\/www.jpl.nasa.gov\/news\/thawing-permafrost-could-leach-microbes-chemicals-into-environment\" rel=\"noopener\">stores 1,700 billion metric tons of carbon<\/a>. Recent studies find that by the year 2100, <a href=\"https:\/\/www.nature.com\/articles\/s41558-023-01909-9\" rel=\"noopener\">defrosting tundra<\/a> sites could spew between 22 billion and 524 billion metric tons of that stored carbon. How much it loses will depend on the rate of warming.\u00a0<\/p>\n<p>Given the expected increase in CO<sub>2<\/sub> releases by microbes and their potential to further warm Earth\u2019s climate, \u201cyou could say this is a doom scenario,\u201d Maes says.<\/p>\n<p>But, she adds, the study\u2019s results do not mean the tundra\u2019s overall release of carbon must skyrocket. In the end, other processes may counter this. For example, plants could ramp up their <a href=\"https:\/\/www.snexplores.org\/article\/explainer-how-photosynthesis-works\">photosynthesis<\/a>. Along the way, they\u2019d take up and store more CO<sub>2<\/sub>. And these studies have not been looking at what happens outside the Arctic summer.<\/p>\n<p>Including data on all that\u2019s happening in the Arctic may help improve predictions of how the tundra is responding to a warming world. Those data may also be used to gauge how such Arctic impacts will affect the rest of Earth\u2019s climate.<\/p>\n<\/p><\/div>\n<p><br \/>\n<br \/><a href=\"https:\/\/www.snexplores.org\/article\/arctic-microbes-release-carbon-dioxide-climate\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Earth\u2019s tundra is warming about four times faster than the rest of the planet. The rising fever in this Arctic ecosystem is boosting the production of carbon dioxide (CO2) by underground microbes, a new study suggests. If true, it could be setting up a feedback loop that leads to even more warming. Small shrubs, grasses [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":91788,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/www.snexplores.org\/wp-content\/themes\/sciencenews-sns-child\/client\/src\/images\/cta-module-sm@2x.png","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[3206,78658,40597,6733,54649],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/91787"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=91787"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/91787\/revisions"}],"predecessor-version":[{"id":91789,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/91787\/revisions\/91789"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/91788"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=91787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=91787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=91787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}