• Kobuk Wind Study
• Introduction
• Text Bin Files
• Description of results
• Windrose Results
• Data Diagnostics
• Datalogger Battery Voltage
• Available Records by Day-of-Year
• Continuity of Records vs Time
• Contacts

Kobuk Wind Study

Introduction

This project was conducted for the Alaska Department of Transportation's Airport Design group to gather basic design data for Kobuk, Alaska. The study period was from April 11, 2002 through April 3, 2003.

The study tower at Kobuk had two RM Young wind sensors, identified as N and S, both mounted at 10 meter height. The N sensor lost its rotor after several months of operation. The S sensor operated throughout the study.

Text Bin Files

Processed bin files are zipped (*) for each windset of each site. These windrose bin files are intended for processing using DOT's analysis programs. Individual files (identified as pct3.txt, linking to file SCOPE-pct3.txt) may also be viewed below.

• bin files for N windset
• bin files for S windset

Description of results

Data for this one-year study are presented in several forms, textual and graphical, for each month of the year and cumulative.

• textual windrose bins, event counts
  Each bin represents the number of times the wind blew in a specific direction within a specific speed range

• textual windrose bins, percent frequency
  Bin events are normalized to 100 total events

• textual windrose bins, comma-separated percentages
  Data is presented for use by a windrose analysis program, with bin values separated by commas, and presented as percent frequency to 3 decimal places.

• graphical windrose
  Polar plot of windrose sectors, with colors representing specific windspeed ranges, and graduated in frequency of events (i.e., normalized to 1 event total).

  Note: The windrose plot software used is experimental and not yet proven to be correct or accurate.

• distribution plot of windspeed vs direction
  This experimental plot is presented for comparison with the windrose data and plots. It should provide a direct view of the data distribution, and might be useful or not.

In addition to the wind data results, a few other diagnostic plots are provided to help assess the reliability of the data.

Windrose Results

scope	S windset windrose bins	S windset windrose	S windset windspeed vs direction		N windset windrose bins	N windset windrose	N windset windspeed vs direction
all data	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
January	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
February	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
March	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
April	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
May	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
June	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
July	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
August	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
September	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
October	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
November	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt
December	counts.txt percent.txt pct3.txt				counts.txt percent.txt pct3.txt

Data Diagnostics

Datalogger Battery Voltage

datalogger battery voltage during the study

Available Records by Day-of-Year

For each day and hour of the year, the number of available data records is indicated.

record counts, all available data:

link to this data file

Continuity of Records vs Time

In this section we plot an increasing value when contiguous records are available, and either leave the value as-is or reset it to 0 when records are missing. The purpose is to try to highlight the availability or lack of data.

record continuity, all available data:

record continuity, reset to zero on discontinuity

Contacts

If you have any questions or comments about this project, contact:

• Douglas L. Kane <ffdlk@uaf.edu>, 907-474-7808

• Ken Irving <fnkci@uaf.edu>, 907-474-6152