{"id":31451,"date":"2020-05-20T12:14:08","date_gmt":"2020-05-20T12:14:08","guid":{"rendered":"http:\/\/www.hgi-cgs.hr\/?page_id=31451"},"modified":"2021-01-04T08:28:09","modified_gmt":"2021-01-04T08:28:09","slug":"istrazivanja-siga","status":"publish","type":"page","link":"https:\/\/www.hgi-cgs.hr\/en\/istrazivanja-siga\/","title":{"rendered":"Speleothems and Paleoclimate"},"content":{"rendered":"

[et_pb_section fb_built=”1″ fullwidth=”on” _builder_version=”4.4.1″ custom_padding=”0px||0px|||”][et_pb_fullwidth_slider _builder_version=”4.7.7″ min_height=”112px” height=”400px” custom_margin=”0px||||false|false” custom_padding=”0px||18px||false|false” auto=”on” auto_ignore_hover=”on” locked=”off”][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/Br\u010di\u0107_Drvenik02-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban2-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/20190228_094232-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban3-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/Bijele_stijene-Gorski_kotar-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban4-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.4.1″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/03\/ban5-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.7.7″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/04\/20191015_142016a-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][et_pb_slide heading=”Hrvatski geolo\u0161ki institut” _builder_version=”4.7.7″ header_font=”|||on|||||” background_image=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/04\/20191014_133538-scaled.jpg” background_enable_image=”on” locked=”off” sticky_transition=”on”][\/et_pb_slide][\/et_pb_fullwidth_slider][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.4.2″][et_pb_row _builder_version=”4.4.2″][et_pb_column type=”4_4″ _builder_version=”4.4.2″][et_pb_text _builder_version=”4.4.7″ text_font_size=”32px” header_2_text_color=”#1e5096″ header_2_line_height=”1.2em” header_4_line_height=”1.3em” custom_margin=”||-12px|||”]<\/p>\n

GEOLO\u0160KA ISTRA\u017dIVANJA KVARTARA
<\/strong><\/h2>\n

Istra\u017eivanja siga
<\/strong><\/h4>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.4.2″ custom_margin=”-9px|||||” custom_padding=”0px||41px|||”][et_pb_row _builder_version=”3.25″ custom_padding=”15px|0px|28px|0px|false|false”][et_pb_column type=”4_4″ _builder_version=”3.25″ custom_padding=”|||” custom_padding__hover=”|||”][et_pb_text _builder_version=”4.6.5″ custom_margin=”-4px|||||”]<\/p>\n

Istra\u017eivanja siga u Institutu provode se kao podzemni zapis prija\u0161njih klimatskih promjena tijekom kvartara. Sige su sekundarni karbonatni spiljski nanosi koji se formiraju djelovanjem podzemnim voda unutar podzemnih pukotina u kr\u0161u. Stalagmiti nastaju kapanjem vodene otopine sa stropa \u0161pilje te brzina rasta ovisi o sastavu prokapnice i ki\u0161nice te o klimatskim uvjetima. Prema tome, stalagmiti mogu sadr\u017eavati zapis prija\u0161njih promjena okoli\u0161a talo\u017eenja.<\/p>\n

Istalo\u017eeni slojevi se mogu precizno datirati, koriste\u0107i uran-torij (U-Th) i uran-olovo (U-Pb) izotopne metode odre\u0111ivanja starosti te metodu radioaktivnog izotopa ugljika. Debljina istalo\u017eenih slojeva, njihov izotopni i elementni sastav mo\u017ee se koristiti za odre\u0111ivanje prija\u0161njih klimatskih promjena u razli\u010ditim rezolucijama. Prednost kori\u0161tenja siga u paleoklimatskim istra\u017eivanjima u usporedbi s drugim arhivima jest njihova \u0161iroka rasprostranjenost (gotovo u svim klimatskim zonama), dobra o\u010duvanost (za\u0161ti\u0107enost u stabilnim spiljskim okoli\u0161ima kroz duge vremenske periode), vi\u0161estruki klimatski-osjetljivi posredni pokazatelji i relativno visoka rezolucija (godi\u0161nja ili je \u010dak \u010desto mogu\u0107a sezonska rezolucija). Dakle, sige su jedan od mogu\u0107ih na\u010dina utvr\u0111ivanja paleoklimatskih uvjeta i sve ve\u0107i broj istra\u017eivanja \u00a0pokazuje njihovu korisnost u odre\u0111ivanju klimatskih varijabilnosti u pro\u0161losti, uklju\u010duju\u0107i istra\u017eiva\u010de iz Instituta, koji imaju veliku ulogu u pomicanju granica istra\u017eivanja siga u svijetu, \u0161to potvr\u0111uje objavljen znanstveni rad u presti\u017enom \u010dasopisu Science dr. sc. Petre Bajo:<\/p>\n

Bajo et al<\/em><\/strong>. Science 2020; 367: 1235-1239, Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transtion.<\/strong><\/p>\n

https:\/\/science.sciencemag.org\/content\/367\/6483\/1235.abstract<\/em><\/a><\/p>\n

Iz doma\u0107ih medija:<\/p>\n

https:\/\/www.tportal.hr\/tehno\/clanak\/rad-hrvatske-znanstvenice-petre-bajo-o-ledenom-dobu-objavljen-u-prestiznom-casopisu-science-20200318<\/em><\/a><\/p>\n

https:\/\/zimo.dnevnik.hr\/clanak\/hrvatska-znanstvenica-po-prvi-put-objasnila-kad-su-tocno-i-zasto-zavrsila-ledena-doba—597984.html<\/a><\/em><\/p>\n

https:\/\/otvoreno.hr\/magazin\/rad-hrvatske-znanstvenice-objavljen-u-prestiznom-casopisu-science\/268666<\/a><\/em><\/p>\n

[\/et_pb_text][et_pb_image src=”https:\/\/www.hgi-cgs.hr\/wp-content\/uploads\/2020\/05\/laminirana-siga.jpg” title_text=”laminirana siga” align=”center” _builder_version=”4.4.7″ width=”20%” border_radii=”on|5px|5px|5px|5px” box_shadow_style=”preset1″][\/et_pb_image][et_pb_text _builder_version=”4.6.5″ text_font_size=”13px” custom_margin=”-30px||||false|false”]<\/p>\n

Laminirana siga iz spilje Nova Grgosova kod Samobora.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

GEOLO\u0160KA ISTRA\u017dIVANJA KVARTARA Istra\u017eivanja sigaIstra\u017eivanja siga u Institutu provode se kao podzemni zapis prija\u0161njih klimatskih promjena tijekom kvartara. Sige su sekundarni karbonatni spiljski nanosi koji se formiraju djelovanjem podzemnim voda unutar podzemnih pukotina u kr\u0161u. Stalagmiti nastaju kapanjem vodene otopine sa stropa \u0161pilje te brzina rasta ovisi o sastavu prokapnice i ki\u0161nice te o klimatskim […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-31451","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/pages\/31451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/comments?post=31451"}],"version-history":[{"count":7,"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/pages\/31451\/revisions"}],"predecessor-version":[{"id":37667,"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/pages\/31451\/revisions\/37667"}],"wp:attachment":[{"href":"https:\/\/www.hgi-cgs.hr\/en\/wp-json\/wp\/v2\/media?parent=31451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}