Effects of cloudiness on global and diffuse UV irradiance in a high-mountain area

1994 ◽  
Vol 50 (1-2) ◽  
pp. 23-30 ◽  
Author(s):  
M. Blumthaler ◽  
W. Ambach ◽  
M. Salzgeber
Keyword(s):  
High Mountain ◽  
Mountain Area ◽  
Uv Irradiance ◽  
High Mountain Area

Influence of climate change on soil erosion in high mountain area: a case study of upper Heihe river basin

2021 ◽  
Author(s):  
Li Wang ◽  
Fan Zhang ◽  
Guanxing Wang
Keyword(s):  
Climate Change ◽  
Soil Erosion ◽  
River Basin ◽  
Effect Of Temperature ◽  
Heihe River ◽  
High Mountain ◽  
Mountain Area ◽  
Impact Of Climate Change ◽  
High Mountain Area ◽  
The Impact

<p>The impact of climate change on soil erosion is pronounced in high mountain area. In this study, the revised universal soil loss equation (RUSLE) model was improved for better calculation of soil erosion during snowmelt period by integrating a distributed hydrological model in upper Heihe river basin (UHRB). The results showed that the annual average soil erosion rate from 1982 to 2015 in the study area was 8.1 t ha<sup>-1 </sup>yr<sup>-1</sup>, belonging to the light grade. To evaluate the influence of climate change on soil erosion, detrended analysis of precipitation, temperature and NDVI was conducted. It was found that in detrended analysis of precipitation and temperature, the soil erosion of UHRB would decrease 26.5% and 3.0%, respectively. While in detrended analysis of NDVI, soil erosion would increase 9.9%. Compared with precipitation, the effect of temperature on total soil erosion was not significant, but the detrended analysis of temperature showed that the effect of temperature on soil erosion during snowmelt period can reach 70%. These finding were helpful for better understanding of the impact of climate change on soil erosion and provide a scientific basis for soil management in high mountain area under climate change in the future.</p>

scholarly journals Periglacial environments and frozen ground in the central Pyrenean high mountain area: Ground thermal regime and distribution of landforms and processes

2019 ◽  
Vol 30 (4) ◽  
pp. 292-309 ◽  
Author(s):  
Enrique Serrano ◽  
José Juan Sanjosé‐Blasco ◽  
Manuel Gómez‐Lende ◽  
Juan Ignacio López‐Moreno ◽  
Alfonso Pisabarro ◽  
...  
Keyword(s):  
Thermal Regime ◽  
High Mountain ◽  
Frozen Ground ◽  
Mountain Area ◽  
High Mountain Area

scholarly journals The viability of the crustacean Eurycercus lamellatus (Branchiopoda, Cladocera) in a high mountain area in southern Norway

2020 ◽  
Vol 40 ◽  
pp. 22-42 ◽  
Author(s):  
Tore Qvenild ◽  
Trygve Hesthagen
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
High Mountain ◽  
Mountain Area ◽  
Growing Seasons ◽  
Western Area ◽  
Brown Trout Salmo Trutta ◽  
High Predation ◽  
Southern Norway ◽  
High Mountain Area

The branchiopod Eurycercus lamellatus is widely distributed in Norwegian lakes, ranging from coastal to alpine areas. On the Hardangervidda mountain plateau in southern Norway, E. lamellatus was searched for in 144 lakes in 11 catchments in the western and 16 catchments in the central and eastern areas. Their occurrence is mainly based on the diet of brown trout Salmo trutta. Eurycercus lamellatus was recorded in 25% and 70% of the lakes in these two areas, respectively. This may be due to striking differences in the environmental conditions, with more dilute water and lower water temperatures in western areas, and hence shorter growing seasons. The occurrence of E. lamellatus in central and eastern catchments increased with lake size, being found in 65% and 85% of lakes with a surface area of <2.0 and ≥2.0 km2, respectively. In the western area, E. lamellatus occurred less frequently in lakes above 1000 m a.s.l. That was not the case for lakes in central and eastern catchments. In this central part of Hardangervidda, the relative abundance of E. lamellatus in the diet of brown trout was obtained from five different lakes, showing that they were preyed upon throughout the growing season (June to October). When the two big crustaceans Gammarus lacustris and Lepidurus arcticus are at low densities in these lakes, E. lamellatus became the staple food item for brown trout, except for larger fish (>400 mm). However, under high predation pressure, E. lamellatus also contributed significantly to the diet of larger fish. The abundance of E. lamellatus seems to vary highly on a yearly basis in one of the lakes (Sandvatn). Even though E. lamellatus is described as a typical littoral species, it was common down to depths of 15 m.

scholarly journals Aviation Hazards in the Sky over Thada as Revealed by Meso-scale Meteorological Modeling

2015 ◽  
Vol 19 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Ram P. Regmi
Keyword(s):  
Traffic Control ◽  
Wrf Model ◽  
High Mountain ◽  
Mountain Area ◽  
Weather Pattern ◽  
Elevation Data ◽  
Aviation Hazards ◽  
Meteorological Modeling ◽  
Terrain Elevation ◽  
High Mountain Area

The airplane of Nepal Army in-route to Kathmandu Airport from Nepalgunj lost its communication with the air traffic control room from the sky of Thada of Arghakhachi District. The plane was found with breath taking crashing over the Bowang high mountain area of Baglung District. The weather pattern over the area has been numerically reconstructed with the application of Weather Research and Forecasting (WRF) model initialized with NCEP FNL meteorological and USGS land use and terrain elevation data to examined the effect of prevailing weather pattern. The reconstructed weather pattern show that the atmosphere over Thada and associated areas capture an adverse condition for aviation activities, as it appears highly turbulent and is intense subsidence prone. A detail long-term investigation usefully complemented with field observation may provide better understanding and for improved flight safety.Journal of Institute of Science and Technology, 2014, 19(2): 65-70

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