{"name":"understanding-past-climatic-and-hydrological-variability-in-the-mediterranean-from-lake-prespa","title":"Understanding past climatic and hydrological variability in the Mediterranean from Lake Prespa sediment isotope and geochemical record over the Last Glacial cycle","maintainer":"Konstantinos Panagiotopoulos","maintainer_email":"panagiotopoulos.k@uni-koeln.de","notes":"Here we present stable isotope and geochemical data from Lake Prespa (Macedonia/Albania border) over the Last Glacial cycle (Marine Isotope Stages 5-1) and discuss past lake hydrology and climate (TIC, oxygen and carbon isotopes), as well as responses to climate of terrestrial and aquatic vegetation (TOC, Rock Eval pyrolysis, carbon isotopes, pollen). The Lake Prespa sediments broadly fall into 5 zones based on their sedimentology, geochemistry, palynology and the existing chronology. The Glacial sediments suggest low supply of carbon to the lake, but high summer productivity intermittent siderite layers suggest that although the lake was likely to have mixed regularly leading to enhanced oxidation of organic matter, there must have been within sediment reducing conditions and methanogenesis. MIS 5 and 1 sediments suggest much more productivity, higher rates of organic material preservation possibly due to more limited mixing with longer periods of oxygen-depleted bottom waters. We also calculated lakewater 18O from siderite (authigenic/Glacial) and calcite (endogenic/Holocene) and show much lower lakewater 18O values in the Glacial when compared to the Holocene, suggesting the lake was less evaporative in the Glacial, probably as a consequence of cooler summers and longer winter ice cover. In the Holocene the oxygen isotope data suggests general humidity, with just 2 marked arid phases, features observed in other Eastern and Central Mediterranean lakes.","type":"researchdata_literature","resources":[{"description":"","format":"URL","url":"http://www.sciencedirect.com/science/article/pii/S027737911200282X","created":"2015-01-30T11:45:32.978794","state":"active","package_id":"31de4a3f-153f-4739-9c0d-150e69739f70","last_modified":"2021-10-23T03:10:57","id":"5a7e7fa0-bc0b-4331-8a7b-d5e7df6e43a7","name":"http://www.sciencedirect.com/science/article/pii/S027737911200282X"}],"tags":[{"name":"GQT2"},{"name":"LRQ6"},{"name":"geochemistry"},{"name":"lake"},{"name":"late quaternary"},{"name":"mediterranean"},{"name":"rock eval pyrolysis"},{"name":"stable isotopes"}],"extras":[{"key":"bibtex:address","value":""},{"key":"bibtex:author","value":"Leng, Melanie J. and Wagner, Bernd and B\u00f6hm, Anne and Panagiotopoulos, Konstantinos and Vane, Christopher H. and Snelling, Andrea and Haidon, Cheryl and Woodley, Ewan and Vogel, Hendrik and Zanchetta, Gianni and Baneschi, Ilaria"},{"key":"bibtex:booktitle","value":""},{"key":"bibtex:citation","value":""},{"key":"bibtex:doi","value":"http://dx.doi.org/10.1016/j.quascirev.2012.07.015"},{"key":"bibtex:editor","value":""},{"key":"bibtex:howpublished","value":""},{"key":"bibtex:isbn","value":""},{"key":"bibtex:journal","value":"Quaternary Science Reviews"},{"key":"bibtex:month","value":""},{"key":"bibtex:number","value":""},{"key":"bibtex:organization","value":""},{"key":"bibtex:pages","value":"123-136"},{"key":"bibtex:publisher","value":""},{"key":"bibtex:school","value":""},{"key":"bibtex:series","value":""},{"key":"bibtex:type","value":"article"},{"key":"bibtex:key","value":""},{"key":"bibtex:url","value":"http://www.sciencedirect.com/science/article/pii/S027737911200282X"},{"key":"bibtex:volume","value":"66"},{"key":"bibtex:year","value":"2013"},{"key":"Spatial","value":"{\"type\":\"Polygon\",\"coordinates\":[[[20.85,41.05],[21.15,40.71],[21.15,40.71],[20.85,40.71]]]}"}],"groups":[{"image_url":"http://crc806db.uni-koeln.de/fileadmin/template/images/projects/imageB2.png","name":"b2"}],"author":" Konstantinos Panagiotopoulos","author_email":false}{"help":"Update a dataset (package).\n\n You must be authorized to edit the dataset and the groups that it belongs\n to.\n\n Plugins may change the parameters of this function depending on the value\n of the dataset's ``type`` attribute, see the ``IDatasetForm`` plugin\n interface.\n\n For further parameters see ``package_create()``.\n\n :param id: the name or id of the dataset to update\n :type id: string\n\n :returns: the updated dataset (if 'return_package_dict' is True in the\n context, which is the default. Otherwise returns just the\n dataset id)\n :rtype: dictionary\n\n ","success":false,"error":{"message":"Unable to add package to search index: Solr returned an error: 500 Lock obtain timed out: NativeFSLock@\/var\/lib\/solr\/data\/index\/lucene-d6f7b3bf6fe64f362b4d45bfd4924f54-write.lock org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@\/var\/lib\/solr\/data\/index\/lucene-d6f7b3bf6fe64f362b4d45bfd4924f54-write.lock \tat org.apache.lucene.store.Lock.obtain(Lock.java:85) \tat org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1562) \tat org.apache.lucene.index.IndexWriter.(IndexWriter.java:1418) \tat org.apache.solr.update.SolrIndexWriter.(SolrIndexWriter.java:191) \tat org.apache.solr.update.UpdateHandler.createMainIndexWriter(UpdateHandler.java:98) \tat org.apache.solr.update.DirectUpdateHandler2.openWriter(DirectUpdateHandler2.java:173) \tat org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:220) \tat org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateProcessorFactory.java:61) \tat org.apache.solr.handler.XMLLoader.processUpdate(XMLLoader.java:139) \tat org.apache.solr.handler.XMLLoader.load(XMLLoader.java:69) \tat org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:54) \tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131) \tat org.apache.solr.core.SolrCore.execute(SolrCore.java:1317) \tat org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338) \tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241) \tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) \tat org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) \tat org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) \tat org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) \tat org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) \tat org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) \tat org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) \tat or - \n\n\nError 500 Lock obtain timed out: NativeFSLock@\/var\/lib\/solr\/data\/index\/lucene-d6f7b3bf6fe64f362b4d45bfd4924f54-write.lock\n\norg.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@\/var\/lib\/solr\/data\/index\/lucene-d6f7b3bf6fe64f362b4d45bfd4924f54-write.lock\n\tat org.apache.lucene.store.Lock.obtain(Lock.java:85)\n\tat org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1562)\n\tat org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1418)\n\tat org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:191)\n\tat org.apache.solr.update.UpdateHandler.createMainIndexWriter(UpdateHandler.java:98)\n\tat org.apache.solr.update.DirectUpdateHandler2.openWriter(DirectUpdateHandler2.java:173)\n\tat org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:220)\n\tat org.apache.solr.update.processor.RunUpdateProcessor.processAdd(RunUpdateP","__type":"Search Index Error"}}