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Digital Spectra and Analysis of altitudinal belts in Tianshan Mountains, China

Journal of Mountain Science 2004年第1期1卷 18-28页

作者： ZHANGBaiping MOShenguo WUHongzhi XIAOFei InstituteofGeographicSciencesandNaturalResourcesResearch ChineseAcademyofSciencesBeijingIooIoIChina

Based on the framework of the geo-info spectra of montane altitudinal belts, this paper firstly reviews six classification systems for the spectra of mountain altitudinal belts in China and considers that detailed regional study of altitudinal belts is the key for reaching standardization and systemization of mountain altitudinal belts. Only can this further identify and resolve problems with the study of altitudinal belts. The factors forming the spectra of altitudinal belts are analyzed in the Tianshan Mountains of China, and a digital altitudinal belt system is constructed for the northern flank, southern flank, the heartland, and Ili valley in the west. The characteristics of each belt are revealed with a summarization of the pattern of areal differentiation of altitudinal belts.

关键词： Tianshan Mountains altitudinal belt digital spectrum

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Implications of mass elevation effect for the altitudinal patterns of global ecology

引用

Journal of Geographical Sciences 2016年第7期26卷 871-877页

作者：张百平姚永慧 State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources Research CAS Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application

The varied altitudinal gradient of climate and vegetation is further complicated by mass elevation effect(MEE), especially in high and extensive mountain regions. However, this effect and its implications for mountain altitudinal belts have not been well studied until recently. This paper provides an overview of the research carried out in the past 5 years. MEE is virtually the heating effect of mountain massifs and can be defined as the temperature difference on a given elevation between inside and outside of a mountain mass. It can be digitally modelled with three factors of intra-mountain base elevation(MBE), latitude and hygrometric continentality; MBE usually acts as the primary factor for the magnitude of MEE and, to a great extent, could represent MEE. MEE leads to higher treelines in the interior than in the outside of mountain masses. It makes montane forests to grow at 4800–4900 m and snowlines to develop at about 6000 m in the southern Tibetan Plateau and the central Andes, and large areas of forests to live above 3500 m in a lot of high mountains of the world. The altitudinal distribution of global treelines can be modelled with high precision when taking into account MEE and the result shows that MEE contributes the most to treeline distribution pattern. Without MEE, forests could only develop upmost to about 3500 m above sea level and the world ecological pattern would be much simpler. The quantification of MEE should be further improved with higher resolution data and its global implications are to be further revealed.

关键词： mass elevation effect intra-mountain base elevation treeline altitudinal belt Tibetan Plateau

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