ARM Data OverviewARM Data OverviewARM Data OverviewARM Data Overview

Chuck LongJim Mather

Tom Ackerman

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ARM Instrumentation StrategyARM Instrumentation StrategyARM Instrumentation StrategyARM Instrumentation Strategy

Measure all the radiatively important properties of the atmospheric column and the surface radiation budget State parameters (temp, humidity) Cloud occurrence and properties Aerosol optical depth

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Instrumentation at Darwin ARM siteInstrumentation at Darwin ARM siteInstrumentation at Darwin ARM siteInstrumentation at Darwin ARM site

35 GHz Radar (cloud properties)Lidar (pulsed laser; particle and thin cloud properties )Sky imagers (cloud cover)Broad-band and narrow-band radiometers (solar and infrared radiation)Microwave radiometer (water vapor and liquid water)Meteorology sensors (temp, humidity, winds)

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TWP Darwin Site

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A case studyA case study

January 23, 2006January 23, 2006

A case studyA case study

January 23, 2006January 23, 2006

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mm Cloud Radar – cirrus mode

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mm Cloud Radar – cirrus mode

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mm Cloud Radar – boundary layer mode

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Micropulse lidar (also have ceilometer data)

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Microwave radiometer (2 channel, vertical looking)

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Microwave radiometer (2 channel, vertical looking)

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Darwin, January 23, 2006Shortwave and Longwave Irradiance

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Darwin, January 23, 2006Net Radiative Flux at the Surface

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Other instrumentsOther instrumentsOther instrumentsOther instruments

AERI – Thermal infrared interferometer – provides high resolution spectra in two bands (3-5 m and 8-20 m)Multi-filter rotating shadowband radiometer (MFRSR) – measures narrow band irradiance – retrieve aerosol optical depth and Angstrom coefficient

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Data availabilityData availabilityData availabilityData availability

All systems collecting data continuously since beginning of the experimentAll data available essentially on next day basis from ARM archive Start at www.arm.gov, go to Data and then Data Archive

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Quicklook plots (NOTE: Darwin is “C3”) University of Utah – link on TWP ICE page ARM browser – start at www.arm.gov, go to Data tab;

then “Data plots” tap on right and then “Plot Browser” under Data Quality heading: http://dq.arm.gov/plotbrowser/