> **Surface and Tower Meteorological**
>
> **Instrumentation at NSA**
>
> January 2006
>
> M.T. Ritsche
>
> Work supported by the U.S. Department of Energy,
>
> Office of Science, Office of Biological and Environmental Research

# Contents {#contents .Heading-Front}

[1. Surface and Tower Meteorological Instrumentation at Atqasuk
(METTWR2H)
1](#surface-and-tower-meteorological-instrumentation-at-atqasuk-mettwr2h)

[2. Surface and Tower Meteorological Instrumentation at Barrow
(METTWR4H)
1](#surface-and-tower-meteorological-instrumentation-at-barrow-mettwr4h)

[3. Contacts 1](#contacts)

# Surface and Tower Meteorological Instrumentation at Atqasuk (METTWR2H)

## General Overview

The Surface and Tower Meteorological Instrumentation at Atqasuk
(METTWR2H) uses mainly conventional *in situ* sensors to measure wind
speed, wind direction, air temperature, dew point and humidity mounted
on a 10‑m tower. It also obtains barometric pressure, visibility, and
precipitation data from sensors at or near the base of the tower. In
addition, a Chilled Mirror Hygrometer is located at 1 m for comparison
purposes. Temperature and relative humidity probes are mounted at 2 m
and 5 m on the tower. For more information, see the [Surface and Tower
Meteorological Instrumentation at Atqasuk
Handbook](http://www.arm.gov/publications/tech_reports/handbooks/mettwr2h_handbook.pdf).

The original configuration and collection system for the METTWR2H was
installed in July 2000. In October 2003, the configuration and
collection system was changed considerably. Information on the data,
sensors, and measurement methods prior to October 2003 can be found in
the [Atqasuk Meteorology Station (AMET)
Handbook](http://www.arm.gov/publications/tech_reports/handbooks/amet_handbook.pdf).

# Surface and Tower Meteorological Instrumentation at Barrow (METTWR4H)

## General Overview

The Surface and Tower Meteorological Instrumentation at Barrow
(METTWR4H) uses mainly conventional *in situ* sensors mounted at four
different heights (2 m, 10 m, 20 m and 40 m) on a 40‑m tower to obtain
profiles of wind speed, wind direction, air temperature, dew point and
humidity. It also obtains barometric pressure, visibility, and
precipitation data from sensors at the base of the tower. In addition, a
Chilled Mirror Hygrometer and an ultrasonic wind speed sensor are
located near the 2 m level for comparison purposes. For more
information, see the [Surface and Tower Meteorological Instrumentation
at Barrow
Handbook](http://www.arm.gov/publications/tech_reports/handbooks/mettwr4h_handbook.pdf).

The original configuration and collection system for the METTWR4H was
installed in March 1998. In October 2003, the configuration and
collection system was changed considerably. Information on the data,
sensors, and measurement methods prior to October 2003 can be found in
the [Barrow Meteorology Station (BMET)
Handbook](http://www.arm.gov/publications/tech_reports/handbooks/bmet_handbook.pdf).

# Contacts

## Mentor

Michael Ritsche, Scientific Associate\
Argonne National Laboratory

9700 South Cass Avenue, Bldg. 203\
Argonne, IL 60439\
Phone: 630-252-1554\
Fax: 630-252-5498\
Email:
[mtritsche@anl.gov](http://www.arm.gov/instruments/static/mail to: mtritsche@anl.gov)