scholarly journals Characteristics of groundwater circulation in Northeast Qinghai-Tibet Plateau and its response to climate change and human activities: a case study of Delingha

China Geology ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 1-13
Author(s):  
Wei Zhao ◽  
◽  
Yan-zhu Lin ◽  
Peng-peng Zhou ◽  
Guang-cai Wang ◽  
...  
Keyword(s):  
Climate Change ◽  
Human Activities ◽  
Tibet Plateau ◽  
Groundwater Circulation ◽  
Qinghai Tibet Plateau

scholarly journals The Impacts of Human Activities on Ecosystems within China’s Nature Reserves

2019 ◽  
Vol 11 (23) ◽  
pp. 6629
Author(s):  
Ping Zhu ◽  
Wei Cao ◽  
Lin Huang ◽  
Tong Xiao ◽  
Jun Zhai
Keyword(s):  
Climate Change ◽  
Human Activities ◽  
Arid Zone ◽  
Ecosystem Dynamics ◽  
Tibet Plateau ◽  
Warm Temperate Zone ◽  
Nighttime Light ◽  
Qinghai Tibet Plateau ◽  
Warm Temperate ◽  
Semi Arid

Protected areas (PAs) provide refuges for threatened species and are considered to be the most important approach to biodiversity conservation. Besides climate change, increasing human population is the biggest threat to biodiversity and habitats in PAs. In this paper, the temporal and spatial variations of land cover changes (LCC), vegetation fraction (VFC), and net primary productivity (NPP) were studied to present the ecosystem dynamics of habitats in 6 different types of national nature reserves (NNRs) in 8 climate zones in China. Furthermore, we used Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS) nighttime light datasets and the human disturbance (HD) index estimated from LCC to quantify the living and developing human pressures within the NNRs in the period 2000–2013. The results showed that (1) the living human activities of NNRs increased apparently in the humid warm-temperate zone, Qinghai-Tibet Plateau, mid-temperate semi-arid zone, and mid-temperate humid zone, with the highest increase of nighttime light observed in inland wetlands; (2) the developing human activities in NNRs indicated by the HD index were higher in the humid warm-temperate zone and mid-temperate semi-arid zone as a result of increasing areas of agricultural and built activities, and lower in the sub-tropics due to improved conservation of forest ecosystems; (3) the relationship between HD and VFC suggests that ecosystems in most NNRs of south-subtropics, mid-temperate arid zone and Qinghai-Tibet Plateau were predominantly impacted by climate change. However, HDs were the prevalent factor of ecosystem dynamics in most NNRs of north-subtropics, mid-temperate semi-arid and humid zones.

scholarly journals Impact assessment of climate change and human activities on wind erosion on the Qinghai-Tibet Plateau, China

Authorea ◽  
2020 ◽  
Author(s):  
Yanmin Teng ◽  
Jinyan Zhan ◽  
Wei Liu ◽  
Yongxiu Sun ◽  
Boappeah Frank ◽  
...  
Keyword(s):  
Climate Change ◽  
Impact Assessment ◽  
Human Activities ◽  
Wind Erosion ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

scholarly journals The Influences of Climate Change and Human Activities on Vegetation Dynamics in the Qinghai-Tibet Plateau

2016 ◽  
Vol 8 (10) ◽  
pp. 876 ◽  
Author(s):  
Ke Huang ◽  
Yangjian Zhang ◽  
Juntao Zhu ◽  
Yaojie Liu ◽  
Jiaxing Zu ◽  
...  
Keyword(s):  
Climate Change ◽  
Human Activities ◽  
Vegetation Dynamics ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

scholarly journals How Does Spring Phenology Respond to Climate Change in Ecologically Fragile Grassland? A Case Study from the Northeast Qinghai-Tibet Plateau

2021 ◽  
Vol 13 (22) ◽  
pp. 12781
Author(s):  
Xin Yang ◽  
Yuanyuan Hao ◽  
Wenxia Cao ◽  
Xiaojun Yu ◽  
Limin Hua ◽  
...  
Keyword(s):  
Climate Change ◽  
Environmental Factors ◽  
Global Climate ◽  
Tibet Plateau ◽  
The Tibetan Plateau ◽  
Threshold Method ◽  
Spring Phenology ◽  
Important Indicator ◽  
Qinghai Tibet Plateau

Vegetation phenology is an important indicator of global climate change, and the response of grassland phenology to climate change is particularly sensitive in ecologically fragile areas. To enhance the ecological security of the Tibetan Plateau, it is crucial to determine the relationship between fluctuations in the start of the growing season (SOS) and the response to environmental factors. We investigated the trends of the intra-annual (ten-day) and interannual spatiotemporal dynamics of the SOS on the Northeast Qinghai-Tibet Plateau (NQTP) from 2000–2020 with MOD09GA data. We identified the response relationships with environmental factors (climate, terrain) using the maximum value composite method and the Savitzky–Golay filtering and dynamic threshold method. The SOS was concentrated from the 110th to 150th days; the average annual SOS was on the 128th day, with a spatial pattern of “early in the east and late in the west”. The overall trend of the SOS was advanced (45.48%); the regions with the advanced trend were mainly distributed in the eastern part of the NQTP. The regions with a delayed SOS were mainly concentrated in the higher-altitude regions in the southwest (38.31%). The temperature, precipitation and SOS exhibited a reverse fluctuation trend around the midpoint of 2010. Precipitation affected the SOS earlier than temperature. When temperature became a limitation of the SOS, precipitation had a more significant regulatory effect on the SOS. The SOS and aspect, slope and altitude were distributed in axisymmetric, pyramidal and inverted pyramidal shapes, respectively. The SOS on shaded slopes was earlier and more intensive than that on sunny slopes. With increasing slope, the area of the SOS decreased, and it occurred later. The SOS area was largest at 4500–5000 m and decreased at lower and higher altitude intervals. The SOS occurred later as altitude increased.

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