کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6446207 | 1640839 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The carbon stock of alpine peatlands on the Qinghai-Tibetan Plateau during the Holocene and their future fate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Most studies about carbon dynamics of peatlands have been focused on boreal, subarctic and tropical peatlands. However, there is limited data about carbon dynamics of alpine peatlands, like Zoige peatlands on the Qinghai-Tibetan Plateau (QTP), which are sensitive to climate change and human disturbance. We studied the role of these peat deposits on the Zoige as a C reserve and sink by measuring peat depth, radiocarbon age and peat and C accumulation rates at 7 sites. The peat depths of the sample sites ranged from 0.20 to 6.0 m; the basal age on the plateau varied from 1635 to 14095 cal yr BP; the peat accumulation rates ranged from 0.12 to 0.85 mm yrâ1, and the C accumulation rates from 5 to 48 g mâ2 yrâ1. Based on data of field studies and remote sensing, we regarded that with 3179 km2 of intact peatlands, about 1426 km2 of degraded peatlands, and the total area of Zoige peatlands was 4605 km2. The current peat C stock of Zoige peatlands was0.477 Pg (ranging from 0.206 to 0.672 Pg). We also estimated that peatlands covered an area of about 5091 km2on the QTP and sequestered 0.543 Pg C, 88% in Zoige and the rest in other parts of the plateau. Human activities, together with the ubiquitous warming on the plateau (temperature increased by 0.2 °C per decade over the past 50 years) not only shrank the area of intact peatlands, but also caused substantial carbon releasing from peatlands.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Science Reviews - Volume 95, 1 July 2014, Pages 151-158
Journal: Quaternary Science Reviews - Volume 95, 1 July 2014, Pages 151-158
نویسندگان
Huai Chen, Gang Yang, Changhui Peng, Yao Zhang, Dan Zhu, Qiuan Zhu, Ji Hu, Mei Wang, Wei Zhan, Erxiong Zhu, Zengzhi Bai, Wei Li, Ning Wu, Yanfen Wang, Yongheng Gao, Jianqing Tian, Xiaoming Kang, Xinquan Zhao, Jianghua Wu,