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User warning: The following module has moved within the file system: libraries. In order to fix this, clear caches or put the module back in its original location. For more information, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1128 of /sysldeo/web/ldeodocs/includes/


TRL scientists are dedicated to advancing the science of dendrochronology. The lab has an 'open-door' policy to visitors. The tree-ring and climate software made freely available here is one expression of our commitment to sharing knowledge with students, other scientists, and teachers.

The items offered here are free to download. Their only condition for use is that they be used responsibly. When necessary, we may be able to provide basic information or explain how to use and install software, but in general we can offer only limited user support.