The basic meteorological data are measured and recorded simultaneously by a Autmatic Weather Station. The Meteorological parameters measured are: - air temperature unit[deg C], - Atmospheric pressure[hPa], - Relative humidity[%], - Wind speed[m/s] and direction[deg], - Precipitation[mm].

An Automatic Weather Station (AWS) is located in Namche (3,570 m a.s.l.) in the Khumbu Valley. The meteorological station is part of a network of 6 Automatic Weather Stations (AWSs) installed over the past 10 years in the area of Sagarmatha National Park. The network takes hourly measurements of seven standard parameters: temperature, relative humidity, atmospheric pressure, wind speed and direction, global radiation, total precipitation.

The basic meteorological data are measured and recorded simultaneously by an automatic weather station (AWS). The Meteorological parameters measured are: - air temperature unit[deg C], - Atmospheric pressure[hPa], - Relative humidity[%], - Wind speed[m/s] and direction[deg], - Precipitation[mm].

Aerosol concentration and size distribution of particles with optical diameter between 0.30 and 20 µm have been continuously recorded in 15-size channel by using an OPC Mod. GRIMM 1.108.

In the Khumbu Valley, in the area of Sagarmatha National Park, a network of 6 Automatic Weather Stations (AWSs) has been installed over the past 10 years. Namche Station is part of the station network of automated measurement stations (AWSs) that were installed in the Eastern Himalayas: the AWSs are located at different altitudes, over a stretch oriented approximately 40 km south to north. The network takes hourly measurements of seven standard parameters: temperature, relative humidity, atmospheric pressure, wind speed and direction, global radiation, total precipitation.

The basic meteorological data are measured by a multi-sensor instrument . The Meteorological parameters measured are: - Air temperature unit[deg C], - Atmospheric pressure[hPa], - Relative humidity[%], - Wind speed[m/s] and direction[deg], - Precipitation[mm].

An Automatic Weather Station (AWS) is located in Namche (3,570 m a.s.l.) in the Khumbu Valley. The meteorological station is part of a network of 6 Automatic Weather Stations (AWSs) installed over the past 10 years in the area of Sagarmatha National Park. The network takes hourly measurements of seven standard parameters: temperature, relative humidity, atmospheric pressure, wind speed and direction, global radiation, total precipitation.

At the AWS Lukla station the DQA035 Lsi-Lastem rain gauge is mounted on a 1,5 m pole. This model of Rain gauge has a 1.000 cmq collector area. The measurement device is composed of a collector cone and a double chamber bascule connected to a magnete that operates one (optional two) reed switch, which generates impulses that can be counted by external meters: each impulse is equal to 0.2 mm of rain (optional from 0.1 to 0.5 mm).

High Elevations (HE) is an initiative within the Coordinated Energy and water cycle Observations Project (CEOP) of the World Climate Research Programme (WCRP) Global Energy and Water cycle Experiment (GEWEX).The Scientific Implementation Plan (SIP) of CEOP (http://www.eol.ucar.edu/projects/ceop/dm/new) identifies HE as a “regional study”. HE intends to be a concerted, international and interdisciplinary effort aimed at furthering knowledge on physical and dynamic processes at high elevations, which intends to contribute to global climate and water cycle studies. The goal of HE is to study multi-scale variability of energy and water cycles in high elevation areas while improving corresponding observations, modelling and data management. In this context, the term “high elevations” should be understood to include altitudes above the timberline, high plateaus, rough reliefs, low atmospheric pressure and low average temperature.

Wind speed and direction measurements are carried out by the Vaisala WS425 ultrasonic anemometer.