Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Desert Ecosystem Research Network in China now is consist of 26 national ecological stations, the network layout covers the eight major deserts, the four major sandy lands, the alpine region of the Qinghai-Tibet Plateau, and the karst and other special environments, and undertakes the tasks of positioning observation, monitoring and evaluation, scientific research, demonstration services and base construction of desert ecosystems in China by more than 20 years’ establishment. Relying on the network of ecological stations, large desert and Gobi comprehensive scientific investigations are organized to fill the final blank of desert scientific research in China; the Chinese scheme of comprehensive desertification control is explored, the classical models of the four typical regions are integrated, and industry and discipline standards are formulated. In the new era, the network of desert ecological stations should be based on the advantages of the industry, strengthen the network-connected cooperation, optimize the layout of the network, improve observation technology, expand the scale of research, face the major strategic needs of the country, serve regional social and economic development, answer social and scientific concerns, and provide all-round scientific and technological support for the achievement of the 2030 sustainable development goals.
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区研究》
Abstract：基于内蒙古磴口荒漠生态系统国家定位观测研究站近地层(0~50 m)风沙监测塔所收集的8次沙尘暴的沙尘水平通量、垂直通量和风速风向数据，对乌兰布和沙漠东北缘中小尺度条件下的防护林内外沙尘暴过程中风况变化、沙尘分布特征以及防护林对沙尘暴的影响进行研究。结果表明：① 沙尘暴发生过程中，防护林内外风速均随高度增加呈现递增趋势，风速廓线特征遵循幂函数，防护林内外均以W、WNW、NE方向为主，但每个方向所占比例不同。② 防护林外沙尘水平通量及沙尘浓度随高度增高显著减小，其垂直分布特征均符合指数函数关系；防护林内沙尘水平通量及沙尘浓度则随着高度增高缓慢上升，其垂直分布特征均符合幂函数关系。沙尘垂直通量则均随着高度的增高明显减小，其垂直分布特征均符合幂函数关系。③ 沙尘暴经过防护林体系时，风速显著削弱，平均消减31.03%；沙尘水平通量降低298.16 g·m-2，垂直通量降低0.37 g·m-2，沙尘浓度降低22.48 g·m-2。
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