Namche Atmospheric pressure

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.

 
Citation proposal
(2011) . Namche Atmospheric pressure. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/738da431-2989-42d5-930a-1adc56b9e0d5
 

INSPIRE

Identification

File identifier
738da431-2989-42d5-930a-1adc56b9e0d5   XML
Hierarchy level
Series
Online resource
Protocol
WWW:DOWNLOAD-1.0-http--download
Resource identifier
Encoding
Projection
code
WGS 84 (EPSG:4326)
 

Classification of data and services

Topic category
  • Climatology, meteorology, atmosphere
  • Environment
  • Geoscientific information
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Keywords

GEMET ( Theme )
  • thermal power plant
Other keywords
Keywords
  • SHARE , Network , Station , High Altitude
Keywords
  • CEOP
Keywords ( Place )
  • Namche , Khumbu Valley , Sagarmatha National Park
Keywords ( Theme )
  • Atmospheric Pressure
 
 

Geographic coverage

N
S
E
W


 

Temporal reference

Temporal extent
Temporal extent
Date ( Publication )
2011-05-20T03:00:00
 

Quality and validity

Lineage

The automatic weather stations (AWS) for monitor meteorological conditions is currently included in the SHARE network.

The stations in Nepal and Pakistan are Reference Stations in the CEOP project under the WMO’s World Climate Research

Programme (WCRP) – Global Energy and Water cycle Experiment (GEWEX) initiative.

Ev-K2-CNR recently founded a special interest group called “CEOP-High Elevation” (CEOP-HE), which is dedicated to understanding multi-scale variability and change in hydrological and energy cycles in high elevation regions and studying their role within the climate system on a local and global scale.

The atmospheric pressure on a given surface is the force per unit area exerted by virtue of the weight of the atmosphere above. The pressure is thus equal to the weight of a vertical column of air above a horizontal

projection of the surface, extending to the outer limit of the atmosphere.

Analysed pressure fields are a fundamental requirement of the science of meteorology. It is imperative that these pressure fields be accurately defined as they form the basis for all subsequent predictions of the state of the atmosphere. Pressure measurements must be as accurate as technology will allow, within realistic financial constraints, and there must be uniformity in the measurement and calibration procedures across national boundaries. The level of accuracy needed for pressure measurements to satisfy the requirements of various

meteorological applications has been identified by the respective WMO commission.

The requirements are as follows:

Measuring range: 500 – 1 080 hPa (both station pressure and mean sea-level pressure)

Required target

uncertainty: 0.1 hPa

Reporting resolution: 0.1 hPa

Sensor time constant: 20 s

Output averaging time: 1 min

At the AWS Namche station the CX115P Lsi-Lastem barometer is connected with measurement system (recorder, data logger) that accepts analog signals.

The barometer functions according to the piezometric principle: a resistive film is deposited on a slice of silica with a bridge form; as the pressure changes, the slice will deform and consequently changes the system's resistance.

The CX115P model mounts a special thermal compensation system that significantly reduces drift.

Specific characteristic:

Range: 800 ž 1100 hPa (1 hPa=1 mBar)

Sea level correction range: -300...+2000 mt.

Thermal drift: 0,01 hPa/°C (-10..+60°C)

Linearity&Hysteresis: < 0,3% of the range

Overload: max. 2 Pa

Load resi stance: Current output types: <500W.

Power consumption: 3 W

Response time (T90): 1 ms

Environmental limits: -25 .. +60°C

Output connections: terminals

Weight: 650 gr.

Housing case material: Plastic

Protection: IP40 Downward cable outlet

 

Conformity

Conformity
Conformity
 

Conformity

Conformity
Conformity
 

Restrictions on access and use

Access constraints
 

Restrictions on access and use

 

Responsible organization (s)

Contact for the resource
Organisation name
Ev-K2-CNR
Email
evk2cnr@evk2cnr.org
 

Responsible organization (s)

Contact for the resource
Organisation name
Ev-K2-CNR
Email
evk2cnr@evk2cnr.org
 

Metadata information

Contact for the metadata
Organisation name
Ev-K2-CNR
Email
metadata@evk2cnr.org
Date stamp
2025-02-04T16:45:59
Metadata language
eng
Character set
UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Access constraints
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contact for the resource
 
 

Conformance class 3: harmonized

 
 

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