1. authors and/or source of data PI Larry Mahrt, Oregon State University, mahrt@oce.orst.edu Dean Vickers, Oregon State University, vickers@oce.orst.edu 2. sensors a) horizontal wind components measured with Handar 425A 2D sonic anemometers and 555A data loggers with expanded memory modules and PCMCIA SRAM cards. sampling and logging rate was 0.5 hertz. total of 5 sonics were deployed at 5 different locations. measurement height was 1.0 m above ground at all locations. b) air temperature measured with slow response thermistors and data loggers from Onset Computer Corp. (HOBO H8 External Sensors and HOBO 4-Channel External Logger). sensor range 0C to +44C, accuracy plus/minus 0.3C at +20C, resolution plus/minus 0.2C at +20C, response time in air 5 minutes. sampling and logging rate was one value every 5-minutes. total of 8 ground based thermistors were deployed at 8 different locations. measurement height was 50 cm above ground. c) 8 thermistors were deployed in the vertical on the 10 m tower deployed by the group from the Universitat de Barcelona, Spain (Maria Rosa Soler). these thermistors were installed at heights of 20 cm, 30 cm, 50 cm, 1 m, 2.5 m, 4.2 m, 6.4 m and 9.7 m. d) location of sensors [] = thermistors, () = handar 2d sonics, // = escarpment, (.....) = large distance, X = 55m tower. X= ^ (.....) | North (2) (.....) [1] [3] // [4] [5] [6] [7] [8] [9] (3) (1) (4) (5) ^ | bottom of gulley (lowest elevation) see maps in files gulleymap.pdf, gulleyplace.eps and gulley.eps. 3. derived parameters None. 4. sample time period horizontal wind components and air temperatures are 5-minute means. period of record is a) 29-Sep thru 31-Oct for winds, b) 29-Sep thru 31-Oct for ground based temperatures, and c) 07-Oct thru 01-Nov for tower based temperatures. 5. units a) horizontal wind components (m/s) b) air temperatures (C) 6. version/release number version 1.0 December 1999 subsequent versions may apply calibrations to the ground and tower based thermistor temperatures based on intercomparison studies conducted onsite just prior to deployment and in the lab after the experiment. 7. quality control a) horizontal wind components: there were four separate occasions where a sonic spiked. sonic 5 failed to work after 27-Oct. all known bad values were set equal to missing data code (999). b) ground based thermistors: during the early morning hours of julian days 291,292,293,296 and 297, the air temperature close to the surface went below freezing. the temperature sensors do not work at these temperatures and the system logged a constant value near -1.55 C. these values were set equal to missing data code. based on the time series for thermistor 3, the radiation shield was inadequate during several days and all daytime temperatures from site 3 are suspect. these values were set equal to missing data code. c) tower based thermistors: sensors T2.5m on day 304 and T4.2m on day 280 had a problem of unknown origin that lasted 5-30 minutes. these values were set equal to missing. the tower thermistors suffered the same problems during the below freezing temperatures as did the ground based ones. these values were set equal to missing. sensors T30cm, T2.5m and T6.4m were thought to be inadequately shielded and all daytime temperatures from these senors were set equal to missing. 8. ascii data files handars.5min.txt wind components from 2-D Handar sonics therms.5min.txt temperatures from ground based thermistors towertherms.5min.txt temperatures from tower based thermistors #END