Campaign : Arctic Winter Water Vapor IOP
2004.03.09 - 2004.04.09
Lead Scientist : Ed Westwater
Data Availability
http://www.etl.noaa.gov/programs/2004/wviop/data will contain quicklooks of all of the data.
For data sets, see below.
Summary
During the IOP, the Ground-based Scanning Radiometer of NOAA/ETL, and the ARM MicroWave Radiometer and Microwave Profiler, yielded excellent data over a range of conditions. In all, angular-scanned and calibrated radiometric data from 22.345 to 380 GHz were taken. The Precipitable Water Vapor varied about an order of magnitude from 1 to 10 mm, and surface temperatures varied from about -10 to -40 deg. Celcius. Vaisala RS90 radiosondes were launched 4 times daily from the ARM duplex by ETL, once daily from the ARM CART "Great White" site, and 10 dual radiosonde launches of the chilled mirror + RS90 were done by ETL and NASA Wallops Island. The synoptic National Weather Service radiosondes were also archived: in all, about 220 radiosondes were launched. Quick look data from the cloud radar/lidar indicated that clearly identifiable conditions of clear, liquid, mid-level ice, and mixed phase clouds were present. High quality thermal images of the atmosphere were also taken.
Description
Measurement of water vapor during the cold arctic winter is very difficult because of the lack of sensitivity of conventional water vapor radiometers to low amounts of water vapor and because of uncertainties during these conditions of radiosondes as well. During this IOP, we deployed well-calibrated radiometers over a broad frequency range (18 to 380 GHz), including several channels near the strong water vapor absorption line at 183.31 GHz. These radiometers were supplemented by 4-times-a-day radiosonde observations, and other in situ observations. The radiometers deployed were also useful in measuring clouds during these cold conditions.
Additional Information
A paper for the 2004 ARM Science Team Meeting is available: Ed R. Westwater, Marian Klein, and Vladimir Leuski, Al Gasiewsk, Taneil Uttal, and Duane Hazen, Domenico CiminiM Vinia Mattioli, Bob L. Weber, Sally Dowlatshahi,Joe A. Shaw, Jim Liljegren ,B. M. Lesht, Bernie Zak; The 2004 North Slope Of Alaska Arctic Winter Radiometric Experiment. Proceedings Of The 14th ARM Science Team Meeting, March 22-26, 2004, Albuquerque, New Mexico. Available At Http://Www.Arm.Gov/Docs/Documents/Technical/Conf_0304/Index.Html
Campaign Data Sets
| Campaign Participant | Data Set | Archived Data |
|---|---|---|
| Westwater, Ed | Ground-based Scanning Radiometer | Order Data |
