کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6448684 1642477 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Holocene climate change on the northeastern Tibetan Plateau inferred from mountain-slope pollen and non-pollen palynomorphs
ترجمه فارسی عنوان
تغییرات آب و هوایی هولوکن در ناحیه شمال شرقی تپه ای تبت از ناحیه گرده های کوهستانی و پالینومورف های غیر گرده
کلمات کلیدی
گرده، شیب کوه، تبت پلاتو، هولوسن، آب و هوا، مناسبت ها،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
چکیده انگلیسی
On the northeastern Tibetan Plateau, mountain slope sediments provide a uniquely sensitive perspective on past climate changes. Here, we report a Holocene record of pollen and non-pollen palynomorphs based on compiled data sampled from one continuous alpine slope sediment section (3780 m a.s.l.) near the Gonghe Basin. In the assemblages, higher-order plants are dominant by herbs and shrubs, mainly including Chenopodiacaee, Asteraceae and Poaceae; broadleaved and gymnosperms are very rare. The lower-order (non-pollen) palynomorphs are from fungi, pteridophytes and bryophytes. Both pollen percentages and concentrations show roughly gradual decreasing trends (from ~ 70% to ~ 30% and ~ 10,000 grains/g to ~ 2000 grains/g, respectively), indicating a deteriorating climatic trend characterized by colder and drier. Also, four phases at 8.2-7.4, 5.8-5.3, 3.4-2.9 and 1.8-1.3 ka correlate well with the coldest events that occurred at high latitudes and/or over the Tibetan Plateau. Therefore, we argue that analysis of pollen and non-pollen palynomorphs together can offer an efficient way to reconstruct palaeoclimate changes especially in sedimentary environments that have poor pollen enrichment, such as mountain slopes on the northeast Tibetan Plateau.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Review of Palaeobotany and Palynology - Volume 221, October 2015, Pages 22-31
نویسندگان
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