{"id":161,"date":"2021-11-30T08:00:00","date_gmt":"2021-11-30T05:00:00","guid":{"rendered":"https:\/\/blogs.uef.fi\/uefwater\/?p=161"},"modified":"2021-11-26T10:21:04","modified_gmt":"2021-11-26T07:21:04","slug":"jalleen-sysmajarvella","status":"publish","type":"post","link":"https:\/\/blogs.uef.fi\/uefwater\/2021\/11\/30\/jalleen-sysmajarvella\/","title":{"rendered":"J\u00e4lleen Sysm\u00e4j\u00e4rvell\u00e4"},"content":{"rendered":"\n<p><em>(Blogikirjoitus alunperin julkaistu 9.9.2021, osoitteessa: <a href=\"https:\/\/www.uef.fi\/fi\/artikkeli\/blogi-jalleen-sysmajarvella\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.uef.fi\/fi\/artikkeli\/blogi-jalleen-sysmajarvella<\/a>)<\/em><\/p>\n\n\n\n<div class=\"wp-block-image is-style-rounded\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-1024x1024.jpg\" alt=\"\" class=\"wp-image-54\" width=\"512\" height=\"512\" srcset=\"https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-1024x1024.jpg 1024w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-300x300.jpg 300w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-150x150.jpg 150w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-768x768.jpg 768w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-1536x1536.jpg 1536w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-2048x2048.jpg 2048w, https:\/\/blogs.uef.fi\/uefwater\/wp-content\/uploads\/sites\/166\/2021\/11\/lake_sysmajarvi-100x100.jpg 100w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Teksti: Helena J\u00e4ntti &amp; Hannu Nyk\u00e4nen | Kuva: Carlos Palac\u00edn<\/strong><\/p>\n\n\n\n<p>Teimme tammikuussa 2021 <a href=\"https:\/\/blogs.uef.fi\/uefwater\/2021\/11\/26\/kaivostoiminnan-vaikutusten-tarkastelua-sysmajarvessa\/\" target=\"_blank\" rel=\"noreferrer noopener\">n\u00e4ytteenhakumatkan Outokummun Sysm\u00e4j\u00e4rvelle<\/a> graduty\u00f6t\u00e4 varten. N\u00e4ytteenoton tarkoituksena oli ker\u00e4t\u00e4 j\u00e4rven pohjasedimentti\u00e4 ja tarkastella sen roolia Sysm\u00e4j\u00e4rvess\u00e4 kev\u00e4isin havaituissa happamuuspiikeiss\u00e4. <a href=\"https:\/\/uefconnect.uef.fi\/en\/person\/hannu.nykanen\/\" target=\"_blank\" rel=\"noreferrer noopener\">Kokeneenkin tutkijan<\/a> yll\u00e4tti se, ett\u00e4 j\u00e4rvess\u00e4 oli hapanta jo keskitalvella, eik\u00e4 suinkaan pohjan l\u00e4hell\u00e4 vaan j\u00e4\u00e4n alla. Loogistahan se toki on, ett\u00e4 pH laskee, kun happi kohtaa 2-arvoisia metalleja, joita Sysm\u00e4j\u00e4rvess\u00e4 piisaa vuosikymmenien kaivosvesikuormituksen j\u00e4ljilt\u00e4. Mutta ett\u00e4 pH laskee j\u00e4rvess\u00e4 alle nelj\u00e4n, siihen t\u00f6rm\u00e4\u00e4 harvemmin.<\/p>\n\n\n\n<p>Haastavista s\u00e4\u00e4olosuhteista ja graduntekij\u00e4n kylmist\u00e4 varpaista huolimatta sedimentit saatiin tuolloin ker\u00e4tty\u00e4 ja kokeet laboratoriossa k\u00e4yntiin. Lis\u00e4ksi vinkkasimme ELY:n suuntaan, ett\u00e4 kannattaa tarkkailla Sysm\u00e4j\u00e4rven pH:ta my\u00f6s talvella, vaikka sit\u00e4 ei ole aiemmin rutiinitarkkailussa tehtyk\u00e4\u00e4n. Laboratoriossa tehdyt kokeet osoittivat, ett\u00e4 sedimentiss\u00e4 olevat yhdisteet s\u00e4\u00e4telev\u00e4t hapettuessa ja pelkistyess\u00e4\u00e4n veden pH:ta ja t\u00e4m\u00e4 mekanismi ainakin osittain selitt\u00e4\u00e4 Sysm\u00e4j\u00e4rvess\u00e4 tapahtuvat pH:n vaihtelut. Tulokset osoittivat my\u00f6s varsin selv\u00e4sti, ett\u00e4 prosessin takana ei ole puhdasta kemiaa. Sedimentin yl\u00e4puolisen veden pH vaihteli merkitt\u00e4v\u00e4sti enemm\u00e4n n\u00e4ytteiss\u00e4, joista mikrobit oli eliminoitu pois kuumentamalla. Lis\u00e4\u00e4 t\u00e4st\u00e4 t\u00e4m\u00e4n opinn\u00e4ytety\u00f6n loppup\u00e4\u00e4telmist\u00e4 voi lukea <a href=\"https:\/\/erepo.uef.fi\/handle\/123456789\/25896\" target=\"_blank\" rel=\"noreferrer noopener\">t\u00e4\u00e4lt\u00e4<\/a>. Ja mik\u00e4 noiden mikrobien toimintaa s\u00e4\u00e4telee, siit\u00e4 saisi jo v\u00e4it\u00f6skirjan kasaan.<\/p>\n\n\n\n<p>Koska meit\u00e4 alkoi kiinnostaa kuinka Sysm\u00e4j\u00e4rvi k\u00e4ytt\u00e4ytyy, kun j\u00e4\u00e4kansi sedimentin p\u00e4\u00e4lt\u00e4 poistuu ja happitilanne muuttuu, suunnittelimme toisen n\u00e4ytteenottomatkan vapun tienoille, jolloin j\u00e4iden pit\u00e4isi olla juuri ja juuri l\u00e4hd\u00f6ss\u00e4. Mukaan v\u00e4rv\u00e4ttiin ja <a href=\"https:\/\/blogs.uef.fi\/uefwater\/2021\/11\/23\/talven-limnologiaa-pohjois-%e2%80%8bkarjalassa\/\" target=\"_blank\" rel=\"noreferrer noopener\">menneen talven Pohjois-Karjalan j\u00e4rvill\u00e4 seikkaillut espanjalainen tutkija Carlos<\/a>, joka linnuista innostuneena biogeokemistin\u00e4 halusi sek\u00e4 katsastaa lintutilanteen ett\u00e4 n\u00e4hd\u00e4 biogeokemialtaan varsin erikoisen Sysm\u00e4j\u00e4rven. Tiirailtuamme aikamme j\u00e4\u00e4tilannetta satelliittikuvista, l\u00f6imme labrainssi Pyryn kanssa n\u00e4ytteenottop\u00e4iv\u00e4n lukkoon ja sovimme veneen tuonnista rantaan.<\/p>\n\n\n\n<p>Vaan kuinkapa k\u00e4vik\u00e4\u00e4n\u2026<\/p>\n\n\n\n<p>Tuli muutama tuulinen p\u00e4iv\u00e4, j\u00e4\u00e4t painuivat rannoille ja vesipatsas py\u00f6r\u00e4hti ymp\u00e4ri niin, ett\u00e4 talvella pohjan l\u00e4hell\u00e4 ollut v\u00e4h\u00e4happinen vesi sai happea ja sek\u00e4 happi- ett\u00e4 pH-tilanne tasoittui. T\u00e4st\u00e4 voi tehd\u00e4 kaksi loppup\u00e4\u00e4telm\u00e4\u00e4: 1) jos nopeisiin kemiallisen tilan vaihteluihin haluaa p\u00e4\u00e4st\u00e4 kiinni, mittausp\u00e4iv\u00e4n ennakkoon sopiminen on l\u00e4hes mahdotonta, ja 2) ns. perinteisin keinon tehty monitorointi, jossa n\u00e4ytteenottaja k\u00e4y hakemassa n\u00e4ytteet ennalta sovittuna ajanjaksoina, ei v\u00e4ltt\u00e4m\u00e4tt\u00e4 paljasta j\u00e4rven todellisia ongelmia. Vesien tilan seuranta vaatiikin uudenlaista n\u00e4k\u00f6kulmaa niin monitoroinnin toteuttajille, kun niiss\u00e4 k\u00e4ytett\u00e4ville laitteistoille.<\/p>\n\n\n\n<p>Sysm\u00e4j\u00e4rven, ja monen muun vesist\u00f6n, ongelmien ratkaisu vaatii monitieteist\u00e4 osaamista. On t\u00e4rke\u00e4\u00e4 ymm\u00e4rt\u00e4\u00e4 sek\u00e4 vesist\u00f6n tila ett\u00e4 siihen vaikuttavat ymp\u00e4rist\u00f6tekij\u00e4t. Lis\u00e4ksi on t\u00e4rke\u00e4\u00e4 tuntea ne s\u00e4\u00e4ntelyn keinot, jolla tilaan voidaan vaikuttaa. UEF Water -hanke pyrkii tuottamaan monitieteisi\u00e4 ty\u00f6kaluja tutkimuksen avulla vesien tilan kohentamiseksi.<\/p>\n\n\n\n<p><strong><em>Vesivarojen kest\u00e4v\u00e4 yhteisk\u00e4ytt\u00f6 (WATER) -tutkimusohjelmaa ovat tukemassa Saastamoisen s\u00e4\u00e4ti\u00f6, OLVI-s\u00e4\u00e4ti\u00f6 sek\u00e4 Jenny ja Antti Wihurin rahasto.<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>(Blogikirjoitus alunperin julkaistu 9.9.2021, osoitteessa: https:\/\/www.uef.fi\/fi\/artikkeli\/blogi-jalleen-sysmajarvella) Teksti: Helena J\u00e4ntti &amp; Hannu Nyk\u00e4nen | Kuva: Carlos Palac\u00edn Teimme tammikuussa 2021 n\u00e4ytteenhakumatkan Outokummun Sysm\u00e4j\u00e4rvelle graduty\u00f6t\u00e4 varten. N\u00e4ytteenoton tarkoituksena oli ker\u00e4t\u00e4 j\u00e4rven pohjasedimentti\u00e4 ja tarkastella sen roolia Sysm\u00e4j\u00e4rvess\u00e4 kev\u00e4isin havaituissa happamuuspiikeiss\u00e4. Kokeneenkin tutkijan yll\u00e4tti se, ett\u00e4 j\u00e4rvess\u00e4 oli hapanta jo keskitalvella, eik\u00e4 suinkaan pohjan l\u00e4hell\u00e4 vaan j\u00e4\u00e4n alla. [&hellip;]<\/p>\n","protected":false},"author":489,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-161","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>J\u00e4lleen Sysm\u00e4j\u00e4rvell\u00e4 - UEF WATER \/\/ BLOGS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.uef.fi\/uefwater\/2021\/11\/30\/jalleen-sysmajarvella\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"J\u00e4lleen Sysm\u00e4j\u00e4rvell\u00e4 - UEF WATER \/\/ BLOGS\" \/>\n<meta property=\"og:description\" content=\"(Blogikirjoitus alunperin julkaistu 9.9.2021, osoitteessa: https:\/\/www.uef.fi\/fi\/artikkeli\/blogi-jalleen-sysmajarvella) Teksti: Helena J\u00e4ntti &amp; Hannu Nyk\u00e4nen | Kuva: Carlos Palac\u00edn Teimme tammikuussa 2021 n\u00e4ytteenhakumatkan Outokummun Sysm\u00e4j\u00e4rvelle graduty\u00f6t\u00e4 varten. N\u00e4ytteenoton tarkoituksena oli ker\u00e4t\u00e4 j\u00e4rven pohjasedimentti\u00e4 ja tarkastella sen roolia Sysm\u00e4j\u00e4rvess\u00e4 kev\u00e4isin havaituissa happamuuspiikeiss\u00e4. Kokeneenkin tutkijan yll\u00e4tti se, ett\u00e4 j\u00e4rvess\u00e4 oli hapanta jo keskitalvella, eik\u00e4 suinkaan pohjan l\u00e4hell\u00e4 vaan j\u00e4\u00e4n alla. 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N\u00e4ytteenoton tarkoituksena oli ker\u00e4t\u00e4 j\u00e4rven pohjasedimentti\u00e4 ja tarkastella sen roolia Sysm\u00e4j\u00e4rvess\u00e4 kev\u00e4isin havaituissa happamuuspiikeiss\u00e4. Kokeneenkin tutkijan yll\u00e4tti se, ett\u00e4 j\u00e4rvess\u00e4 oli hapanta jo keskitalvella, eik\u00e4 suinkaan pohjan l\u00e4hell\u00e4 vaan j\u00e4\u00e4n alla. 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