scholarly journals A Combination Forecasting Strategy for Precipitation, Temperature and Wind Speed in the Southeastern Margin of the Tengger Desert

2020 ◽  
Vol 12 (4) ◽  
pp. 1489 ◽  
Author(s):  
Tonglin Fu ◽  
Xinrong Li
Keyword(s):  
Climate Change ◽  
Wind Speed ◽  
Tengger Desert ◽  
Neural Network Models ◽  
Desert Ecosystems ◽  
Local Climate ◽  
Precipitation Temperature ◽  
Combination Forecasting ◽  
Southeastern Margin ◽  
The Tengger Desert

Global warming is inevitably the cause of local climate change, which will have a profound impact on regional ecology, especially in the desertified steppe and steppefied desert transition zones with fragile ecological environments. In order to investigate the change trends of precipitation, temperature and wind speed for effectively realizing the restoration and protection of desert ecosystems, a combination forecasting strategy including the data pre-processing technique, sub-models selection and parameter optimization was proposed and three numerical simulation experiments based on the combination model with the weights optimized by the particle swarm optimization algorithm were designed to forecast the precipitation, temperature and wind speed in the southeastern margin of the Tengger Desert in China. Numerical results showed that the proposed combination prediction method has higher forecasting accuracy and better robustness than single neural network models and hybrid models. The proposed method is beneficial to analyze climate change in arid regions.

Environmental change perception and engagement of mountainous people in Western Himalayas, at Rajouri District, Jammu and Kashmir, India

2021 ◽  
Author(s):  
Mohd Zeeshan ◽  
Huanyuan Zhang ◽  
Liqing Sha ◽  
Gnanamoorthy Palingamoorthy ◽  
Zayar Phyo ◽  
...  
Keyword(s):  
Climate Change ◽  
Wind Speed ◽  
Climate Adaptation ◽  
Scientific Information ◽  
Household Survey ◽  
Western Himalaya ◽  
Crop Productivity ◽  
Western Himalayas ◽  
Jammu And Kashmir ◽  
Local Climate

AbstractSubstantial temperature rise is reported in the Himalayas and the vulnerability of the region to climate change is well recognized. Apt adaptation strategy to cope with climate change calls for informed peoples’ participation, which was rarely investigated in Western Himalaya. Having been better informed, people in developed areas adopt better actions against climate change well guided by their perception. In contrast, Rajouri in Jammu and Kashmir represents a relatively impoverished and climate change vulnerable region. We, therefore, gauge people’s perceptions and actions in this area based on a household survey from 717 randomly selected individuals. Further, consistency of perception was compared with meteorological records on temperature, humidity, wind speed, rainfall, and aboveground biomass from 1983 - 2013. The findings revealed that temperature increases significantly, while changes in rainfall, wind speed, and relative humidity were insignificant. Although people sensed a rise in temperature and deforestation right, most of them differ with respect to rainfall, wind speed, and humidity. They reported rising pollution and traffic, but no change in crop productivity or crop varieties. Of the respondents, 91% considered climate change as a risk, 86.8% reported reactive actions to it and 82.8% reported proactive actions. Locals from varied socio-economic backgrounds are not much informed about climate change; hence, the reasonability of their responses and positive adaptation actions needs further research. To engage people in climate adaptation actions, we suggest disseminating precise scientific information about local climate through awareness programs and by engaging them in climate change activities through suitable organizations.

scholarly journals Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China

2017 ◽  
Vol 14 (16) ◽  
pp. 3801-3814 ◽  
Author(s):  
Lichao Liu ◽  
Yubing Liu ◽  
Peng Zhang ◽  
Guang Song ◽  
Rong Hui ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Alpha Diversity ◽  
Biological Soil Crusts ◽  
Pcr Analysis ◽  
Tengger Desert ◽  
Desert Ecosystems ◽  
Important Indicator ◽  
Soil Crusts ◽  
Successional Stages ◽  
The Tengger Desert

Abstract. Knowledge of structure and function of microbial communities in different successional stages of biological soil crusts (BSCs) is still scarce for desert areas. In this study, Illumina MiSeq sequencing was used to assess the compositional changes of bacterial communities in different ages of BSCs in the revegetation of Shapotou in the Tengger Desert. The most dominant phyla of bacterial communities shifted with the changed types of BSCs in the successional stages, from Firmicutes in mobile sand and physical crusts to Actinobacteria and Proteobacteria in BSCs, and the most dominant genera shifted from Bacillus, Enterococcus and Lactococcus to RB41_norank and JG34-KF-361_norank. Alpha diversity and quantitative real-time polymerase chain reaction (PCR) analysis indicated that bacterial richness and abundance reached their highest levels after 15 years of BSC development. Redundancy analysis showed that silt + clay content and total K were the prime determinants of the bacterial communities of BSCs. The results suggested that bacterial communities of BSCs recovered quickly with the improved soil physicochemical properties in the early stages of BSC succession. Changes in the bacterial community structure may be an important indicator in the biogeochemical cycling and nutrient storage in early successional stages of BSCs in desert ecosystems.

scholarly journals Development of bacterial communities in biological soil crusts along a revegetation chronosequence in the Tengger Desert, northwest China

2017 ◽  
Author(s):  
Lichao Liu ◽  
Yubing Liu ◽  
Peng Zhang ◽  
Guang Song ◽  
Rong Hui ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Alpha Diversity ◽  
Biological Soil Crusts ◽  
Pcr Analysis ◽  
Tengger Desert ◽  
Desert Ecosystems ◽  
Important Indicator ◽  
Soil Crusts ◽  
Successional Stages ◽  
The Tengger Desert

Abstract. Knowledge of structure and function of microbial communities in different successional stages of biological soil crusts (BSCs) is still scarce for desert areas. In this study, Illumina MiSeq sequencing was used to assess the composition changes of bacterial communities in different ages of BSCs in the revegetation of Shapotou in the Tengger Desert. The most dominant phyla of bacterial communities shifted with the changed types of BSCs in the successional stages, from Firmicutes in mobile sand and physical crusts to Actinobacteria and Proteobacteria in BSCs, and the most dominant genera shifted from Bacillus, Enterococcus and Lactococcus to RB41_norank and JG34-KF-361_norank. Alpha diversity and quantitative real-time PCR analysis indicated that bacteria richness and abundance reached their highest levels after 15 years of BSC development. Redundancy analysis showed that soil pH, silt content and carbon:nitrogen ratio were closely related to the bacterial communities of BSCs. The results suggested that bacterial communities of BSCs recovered quickly with the improved soil physicochemical properties in the early stages of BSC succession. Change in the bacterial community structures may be an important indicator in the biogeochemical cycling and nutrient storage in early successional stages of BSCs in desert ecosystems.

scholarly journals Topoclimatological case-study of Alpine pastures near the Albula Pass in the eastern Swiss Alps

2013 ◽  
Vol 68 (4) ◽  
pp. 249-263 ◽  
Author(s):  
P. Michna ◽  
W. Eugster ◽  
R. V. Hiller ◽  
M. J. Zeeman ◽  
H. Wanner
Keyword(s):  
Climate Change ◽  
Wind Speed ◽  
Farming System ◽  
Swiss Alps ◽  
Plant Production ◽  
Small Scale ◽  
Research Station ◽  
Near Surface ◽  
Local Climate

Abstract. Alpine grasslands are an important source of fodder for the cattle of Alpine farmers. Only during the short summer season can these pastures be used for grazing. With the anticipated climate change, it is likely that plant production – and thus the fodder basis for the cattle – will be influenced. Investigating the dependence of biomass production on topoclimatic factors will allow us to better understand how anticipated climate change may influence this traditional Alpine farming system. Because small-scale topoclimatological variations of the main meteorological variables: temperature, humidity, precipitation, shortwave incoming radiation and wind speed are not easily derived from available long-term climate stations in mountainous terrain, it was our goal to investigate the topoclimatic variations over the pastures belonging to the Alp Weissenstein research station north of the Albula Pass in the eastern Swiss Alps. We present a basic assessment of current topoclimatic conditions as a site characterization for ongoing ecological climate change studies. To be able to link short-term studies with long-term climate records, we related agrometeorological measurements with those of surrounding long-term sites run by MeteoSwiss, both on valley bottoms (Davos, Samedan), and on mountain tops (Weissfluhjoch, Piz Corvatsch). We found that the Davos climate station north of the study area is most closely correlated with the local climate of Alp Weissenstein, although a much closer site (Samedan) exists on the other side of the Albula Pass. Mountain top stations, however, did not provide a convincing approximation for the climate at Alp Weissenstein. Direct comparisons of near-surface measurements from a set of 11 small weather stations distributed over the domain where cattle and sheep are grazed indicate that nocturnal minimum air temperature and minimum vapor pressure deficit are mostly governed by the altitudinal gradient, whereas daily maxima – including also wind speed – are more strongly depending on vegetation cover and less on the altitude.

Sign in / Sign up

Export Citation Format

Share Document