气候变化领域集成服务门户(CCPortal): Carbon pools and fluxes measured during a field campaign conducted in 2010 on the Tibetan Plateau at Kema

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.833208
	Carbon pools and fluxes measured during a field campaign conducted in 2010 on the Tibetan Plateau at Kema
	Ingrisch; Johannes; Biermann; Tobias; Seeber; Elke; Leipold; Thomas; Li; Maoshan; Ma; Yaoming; Xu; Xingliang; Miehe; Georg; Guggenberger; Georg; Foken; Thomas; Kuzyakov; Yakov
发布日期	2014-06-06
数据集类型	dataset
英文简介	The Tibetan highlands host the largest alpine grassland ecosystems worldwide, bearing soils that store substantial stocks of carbon (C) that are very sensitive to land use changes. This study focuses on the cycling of photoassimilated C within a Kobresia pygmaea pasture, the dominating ecosystems on the Tibetan highlands. We investigated short-term effects of grazing cessation and the role of the characteristic Kobresia root turf on C fluxes and belowground C turnover. By combining eddy-covariance measurements with 13CO2 pulse labeling we applied a powerful new approach to measure absolute fluxes of assimilates within and between various pools of the plant-soil-atmosphere system. The roots and soil each store roughly 50% of the overall C in the system (76 Mg C/ha), with only a minor contribution from shoots, which is also expressed in the root:shoot ratio of 90. During June and July the pasture acted as a weak C sink with a strong uptake of approximately 2 g C/m**2/ in the first half of July. The root turf was the main compartment for the turnover of photoassimilates, with a subset of highly dynamic roots (mean residence time 20 days), and plays a key role for the C cycling and C storage in this ecosystem. The short-term grazing cessation only affected aboveground biomass but not ecosystem scale C exchange or assimilate allocation into roots and soil.
空间范围	Median Latitude: 31.274048 * Median Longitude: 92.110534 * South-bound Latitude: 31.272980 * West-bound Longitude: 92.109170 * North-bound Latitude: 31.274760 * East-bound Longitude: 92.111390
时间范围	2010-06-09T00:00:00 - 2010-09-03T12:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215503
推荐引用方式 GB/T 7714	Ingrisch,Johannes,Biermann,et al. Carbon pools and fluxes measured during a field campaign conducted in 2010 on the Tibetan Plateau at Kema.2014-06-06.https://doi.org/10.1594/PANGAEA.833208.