Photosynthetic performance at low temperature ofBouteloua gracilisLag., a high‐altitude C4grass from the Rocky Mountains, USA

Analysis of the geological conditions of high-altitude and low-temperature stope slopes and the study of grade division are the basis for the evaluation of slope stability. Based on the engineering background of the eastern slope of the Preparatory iron mine in Hejing County, Xinjiang, we comprehensively analyse and summarize the factors that affect the geological conditions of high-altitude and cold slopes and finally determine nine geological conditions that affect the index parameters. Based on a back-propagation (BP) neural network algorithm, we establish an applicable network model to analyse the geological conditions of slopes in cold areas. The model is applied to the eastern slope to analyse and classify the geological conditions of the high-altitude and low-temperature slopes. The research results show that the skarn rock layer in the eastern slope is in a stable state and not prone to landslides, and its corresponding geological condition is Grade I; meanwhile, the monzonite porphyry rock layer is in a relatively stable state, with a potential for landslides and a corresponding geological condition Grade II. The marble rock layer is in a generally stable state, there is the possibility of landslide accidents, and the corresponding geological condition level is Grade III. The limestone rock layer is in an unstable state and prone to landslide accidents, it has a corresponding geology condition Grade IV. Therefore, the eastern slope can be divided into different geological condition regions: Zone I, Zone II, Zone III, and Zone IV, and the corresponding geological condition levels for these are Grade I, Grade II, Grade III, and Grade IV. These results may provide a basis for the stability evaluation of high altitudes and cold slopes.

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Diversity and Distribution of Bracket Fungi in Mt. Kilakiron, Bukidnon, Philippines

Biosaintifika Journal of Biology & Biology Education ◽

10.15294/biosaintifika.v13i1.24064 ◽

2021 ◽

Vol 13 (1) ◽

pp. 41-50

Author(s):

Mc Arthur Lequin Cababan ◽

Aprille Kake Ora Jaranilla ◽

Mariane Catayas Bastatas ◽

Chazzel Feel Comonong Salvane ◽

Uzziel Campuso Toldo

Keyword(s):

Low Temperature ◽

Nutrient Cycling ◽

High Altitude ◽

Environmental Factor ◽

Trametes Versicolor ◽

Diversity Index ◽

Large Contribution ◽

Floristic Survey ◽

Symbiotic Relationships ◽

Total Species

Fungi have a lot of important function in the bionetwork resembling to decomposition and even nutrient cycling with respect to its symbiotic relationships with trees and other plants. This study aimed to assess the diversity and distribution of bracket fungi in Mt. Kilakiron, Portulin, Pangantucan, Bukidnon. Thus, floristic survey was conducted in one of the mountain of Mindanao to provide information as to what and how many species of bracket fungi are present in Mt. Kilakioron, Bukidnon, Philippines. Â 40 total species belonging to 17 genera and 5 family was collected and assessed. 12 individuals of Trametes versicolor were observe which favors dwellings with low temperature and high altitude are. Additionally, study revealed that most types of bracket fungi initiate in the site are decomposers and saprophytic in nature which contributes a lot in the process of putrefaction. The species of bracket fungi in Mt. Kilakiron clearly shows abundant and provides a large contribution to the ecosystem having high Shannon diversity index. The significance of each environmental factor is discussed in relationship to the ecology of the species. Bracket fungi are reliant on the climatic and conservational settings which makes them as excellent natural pointers of ecosystem in the forests of Mindanao Island, Philippines.

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Unimpeded migration of ions in carbon electrodes with bimodal pores at an ultralow temperature of −100 °C

Journal of Materials Chemistry A ◽

10.1039/c9ta03988k ◽

2019 ◽

Vol 7 (27) ◽

pp. 16339-16346 ◽

Cited By ~ 5

Author(s):

Xi Wang ◽

Jiang Xu ◽

Joselito M. Razal ◽

Ningyi Yuan ◽

Xiaoshuang Zhou ◽

...

Keyword(s):

Energy Storage ◽

Low Temperature ◽

High Altitude ◽

Space Missions ◽

Carbon Electrodes ◽

Discharge Energy ◽

Energy Storage Devices ◽

Storage Devices ◽

Ultralow Temperature ◽

Temperature Applications

The ability to rapidly charge (and discharge) energy storage devices at extremely low temperature (down to −100 °C) is critical for low-temperature applications such as high altitude exploration and space missions.

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Tunnel Collapse Treatment Technique Research in Xinjiang Tianshan High-Altitude, Low-Temperature Mountain

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.580-583.1161 ◽

2014 ◽

Vol 580-583 ◽

pp. 1161-1167 ◽

Cited By ~ 1

Author(s):

Chun Sheng Zhu ◽

Xiao Hua Yang

Keyword(s):

Low Temperature ◽

High Altitude ◽

Deformation Rate ◽

Tianshan Mountains ◽

Stress And Strain ◽

Outlet Section ◽

Treatment Technique ◽

Technical Effect ◽

Geological Conditions ◽

Tunnel Collapse

Based on YuXiMoLeGai tunnel in G217 Cholma to the Nalati highway, aiming at the outlet section of K723+911~K723+919 collapse, through model experiment and numerical calculation combined with on-site measurement, the article studies tunnel collapse treatment technique and technical effect in xinjiang tianshan mountains in the geological conditions of high altitude, low temperature, crushing of rock mass and rock rich in water. The results show that after the CRD method, expanding the scope of the grouting construction, increasing the number of small duct grouting lock foot, strengthening methods of supporting parameters are adopted, vault subsidence deformation rate is 0.4-1.5 mm/d, peripheral convergence deformation rate is 0.5-2.2 mm/d, stress the most unfavorable right hance monthly increase in stress and strain amplitude is 3.97% and 2.35% respectively.The treatment controls the land slide body deformation and stress well.

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Fluxes of semivolatile organochlorine compounds in Bow Lake, a high-altitude, glacier-fed, subalpine lake in the Canadian Rocky Mountains

Limnology and Oceanography ◽

10.4319/lo.2001.46.8.2019 ◽

2001 ◽

Vol 46 (8) ◽

pp. 2019-2031 ◽

Cited By ~ 34

Author(s):

Jules M. Blais ◽

David W. Schindler ◽

Martin Sharp ◽

Eric Braekevelt ◽

Melissa Lafreniěre ◽

...

Keyword(s):

High Altitude ◽

Rocky Mountains ◽

Organochlorine Compounds ◽

Canadian Rocky Mountains ◽

Subalpine Lake

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Wintertime Subkilometer Numerical Forecasts of Near-Surface Variables in the Canadian Rocky Mountains

Monthly Weather Review ◽

10.1175/mwr-d-14-00128.1 ◽

2015 ◽

Vol 143 (2) ◽

pp. 666-686 ◽

Cited By ~ 20

Author(s):

Vincent Vionnet ◽

Stéphane Bélair ◽

Claude Girard ◽

André Plante

Keyword(s):

Relative Humidity ◽

High Altitude ◽

Rocky Mountains ◽

Weather Prediction ◽

Slope Angle ◽

Forecast Accuracy ◽

Surface Radiation ◽

Canadian Rocky Mountains ◽

Grid Spacing ◽

Near Surface

Abstract Numerical weather prediction (NWP) systems operational at many national centers are nowadays used at the kilometer scale. The next generation of NWP models will provide forecasts at the subkilometer scale. Large impacts are expected in mountainous terrain characterized by highly variable orography. This study investigates the ability of the Canadian NWP system to provide an accurate forecast of near-surface variables at the subkilometer scale in the Canadian Rocky Mountains in wintertime when the region is fully covered by snow. Observations collected at valley and high-altitude stations are used to evaluate forecast accuracy at three different grid spacing (2.5, 1, and 0.25 km) over a period of 15 days. Decreasing grid spacing was found to improve temperature forecasts at high-altitude stations because of better orography representation. In contrast, no improvement is obtained at valley stations due to an inability of the model to fully capture at all resolutions the intensity of valley cold pools forming during nighttime. Errors in relative humidity reveal that the model tends to overestimate relative humidity at all resolutions, without improvement with decreasing grid spacing. Wind speed forecasts show large improvements with decreasing grid spacing for high-altitude stations exposed to or sheltered from wind. However, no systematic improvement with decreasing grid spacing is found for all stations, which is similar to previous studies. In addition, the model’s sensitivity at subkilometer grid spacing is investigated by evaluating the effects of (i) accounting for additional drag generated by subgrid orographic features, (ii) considering slope angle and aspect on surface radiation, and (iii) using high-resolution initialization for the surface fields.

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