NCAR activities for Nauru99
Nauru99 is a field project to study the tropical ocean and atmosphere
around the island of Nauru in the central western Pacific ocean.
The project is part of an on-going campaign by the
ARM (Atmospheric Radiation Measurement) program of
the U.S. Department of Energy to study global climate.
Two highly instrumented research vessels, the
R/V Mirai operated by the
Japan Marine Science and Technology Center (JAMSTEC)
R/V Ron Brown operated by NOAA
were deployed for the project.
ARM has a long term climate monitoring station on the island
and one aim of the Nauru99 campaign is to calibrate this station
against measurements made by the ships off the coast of the island.
This activity both checks the instruments and also helps
determine how representative the island measurements
are of the surrounding ocean.
The campaign conducted
a detailed study of the interactions between the tropical ocean and atmosphere
and also provided a test-bed for new technologies for climate monitoring.
NCAR/ATD operated a range of instruments on both the R/V Mirai
and the R/V Ron Brown.
Picture of profilers on the deck of the Mirai
NCAR also maintained a vertically pointing S-Band radar on the Mirai for
Further information on the DBS wind profiler, RASS,
and surface meteorology sensors is on the
Integrated Sounding System page.
MAPR (Multiple Antenna Profiler Radar)
an advanced wind profiler radar capable of making rapid measurements
of the wind profile overhead
DBS (Doppler Beam Swinging) Wind Profiler radar for making regular wind measurements
RASS (Radio Acoustic Sounding System), which uses the DBS Wind Profiler
to track sound waves in order to measure air temperature above the ship
Microwave Radiometer to measure integrated liquid water vapor above the ship.
The radiometer was supplied by
Radiometrics Corporation and was run using software supplied by
Sea surface temperature using a "sea snake" sensor
Surface meteorology sensors to monitor wind, temperature,
humidity, and long and short wave solar radiation
Navigation (GPS and flux-gate magnetometer) and tilt/roll sensors
to correct wind measurements for ship motion
R/V Mirai Daily Plots :