{"id":"90b333c2-fe91-4844-bd60-9b2cb05e6c15","title":"黄河源星星海7400年以来孢粉谱","title_en":"Pollen spectra of Lake Xingxinghai covering the last 7400 years, Yellow River Source Area","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"","description":"2010年1月，作者利用奥地利UWITEC活塞钻在星星海湖泊中心（34°50.44′N, 98°06.34′E）约9米水深处钻取170厘米岩心一根。岩心的年代模型利用210Pb/137Cs 和放射性碳14C（11个测年数据）测年结果，利用Bacon软件的贝叶斯年代深度模型构建，年代模型表明岩心涵盖过去7400年。岩心顶部3厘米样品按0.5厘米间隔分样，其他按1厘米间隔分样，共获得173个孢粉样品。孢粉提取采取常规的酸碱处理法，样品经过盐酸、氢氧化钠、氢氟酸处理后，过7微米筛去除细小杂质并完成醋解（9：1乙酸酐和硫酸混合液处理）。孢粉鉴定在光学显微镜下完成，每个样品鉴定至少300粒陆生植物孢粉。孢粉谱时间分辨率约为40年/样。\n孢粉谱包括58个孢粉类型，已草本植物花粉占主导（占88.5~98.9%；平均93.4%），包括蒿属（高达54.4%），莎草科（高达50.1%），禾本科（高达48.8%），藜科（高达17.9%）和菊科（高达8.5%）。孢粉谱中乔木花粉含量低于5%，主要包括松属（最大值4.9%；平均值1.2%）和桦属（最大值3.0%；平均值0.7%）。本数据集包括其中43个陆生植物花粉的百分比含量及其深度和年代，可应用于过去植被和气候定量重建。","doi":"10.11888/Paleoenv.tpdc.271828","projection":null,"language":"zh","share_type":"online","east":98.0,"west":98.0,"south":34.0,"north":34.0,"scale":null,"crs":null,"filesize":0.048,"share_policy":"a","ts_created":"2021-11-17T18:09:08.774927+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-11-17T19:41:29.345871+08:00","time_description":"","datas_group":2,"time_description_en":"","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21054,"last_login":"2022-04-10T10:49:12.540341+08:00","username":"tingting","email":"panxd@itpcas.ac.cn","is_active":true,"is_staff":true,"user_name":"潘小多"},"data_sources":null,"temporal_resolution":"10 year < x < 100 year","spatial_resolution":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[329,554],"subtopics":{"metadata":"90b333c2-fe91-4844-bd60-9b2cb05e6c15","three_pole":null,"third_pole":null},"username":"Cao Xianyong","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":33}