National Center for Atmospheric Research

FLOSSII ISFF ASCII Data Access

The FLOSSII 5-minute dataset contains means and higher moments from all sensors acquired by NCAR during FLOSSII.

We recommend combining these to obtain more statistically-significant averages over longer time periods.

Status of Dataset

Quality-controlled Data Set, V2 (8 July 2008)

As below, except for the addition of averages of the Snow Depth gauge data.

Quality-controlled Data Set, V1

These data contain 5-minute averages of first-order moments (means) of all variables and second-order moments (including cross-moments) and third- and fourth-order moments (only single-variables) of turbulence variables for the FLOSSII field experiment. These data have all of the processing stated in the FLOSSII WWW page. The highlights are:

Inclusion of data taken at the sage and lake sites in October and November.
Addition of derived sensible and latent heat fluxes with all known corrections.
Addition of derived long-wave radiation with all known corrections.
Addition of derived soil properties and heat flux at the surface corrected for heat storage.
Temperature compensation of the main tower pressure sensor.
Removal of biases in mean temperature and humidity sensors.
Correction of data channel swaps for 25m radiometers.
Removal of sonic anemometer data when internal quality-control flags were set (presumably due to snow/icing).
Removal of krypton hygrometer data in suspected fog/icing conditions and during routine maintenance.
Removal of all radiometer data in suspected snow/icing conditions and during routine maintenance.
Removal of soil moisture data when ground was frozen.

Java Applet and Plugin

Downloading ASCII data (.txt) uses a Java applet for selecting variables and time periods. Your browser must have support for (at least) Java version 1.2 to run the applet. If your browser does not have support for Java 1.2, you should be redirected to a web site where you can download a plug-in for Netscape, Mozilla or Internet Explorer. The plug-in is available for Linux, Solaris and Windows.

Version 1.2 of Mozilla will not redirect you to the plug-in download page if the plug-in is needed. You must click on the java.sun.com link, below to get the plugin.

Java Plug-in Information

Netscape/Mozilla users can enter a URL of about:plugins, or click on Help->About Plug-ins to display the plug-ins which have been installed.

The current Java run-time environment (JRE) which includes the Java plugin for Windows (IE/Netscape/Mozilla), Linux (Netscape/Mozilla) and Solaris (Netscape/Mozilla) is available at http://java.sun.com/j2se/1.4.2/download.html.

If that link is broken, try http://java.sun.com/j2se.

Download the JRE (Java Runtime Enviromment) from the latest version of the J2SE. You don't need the extra stuff, like NetBeans.

Installation instructions are available at http://java.sun.com/j2se/1.4.2/jre/install.html.

Some Notes about the Java plugin on Various Platforms

Java Applet User Interface

The data selection applet provides four areas for user input.

A "Times" section for selecting the start and end times of your request, in GMT.

A "Variables" section for selecting the variables of interest. The variables are grouped under folder tabs by station name, height, and (loosely) by variable type.

An "Output Format" section for choosing the format of the ASCII output

A Download button. The browser will popup a file selection menu where you can enter the desired file name.

Sample of top part of applet. Click to enlarge.

Sample of bottom part of applet. Click to enlarge.

Download Problems

If you experience problems downloading data click here.

ISFF FLOSSII 5min Dataset Access

The FLOSSII ISFF dataset is publically available. However, we ask users to provide their name and email address when they first download data, so that they may be notified of discovered errors or new releases of the dataset.

If you have provided this information before for this dataset, leave the fields blank.

Contact Gordon Maclean if the Java applet does not work after installing the plugin, or if you have any other feedback about the download process.

Please contact your system administrator if you have problems installing the Java plugin in your browser.

User Name:
Organization:
Email address: