US Long-Term Ecological Research Network

The North Temperate Lakes (NTL) LTER Data Access Policy is designed to make data from the NTL-LTER database as freely available as possible for academic, research, education, and other professional purposes and aligns with the Creative Commons license CC-BY 4.0 (see: Each data set published on the web page is accompanied by documentation (metadata). We encourage the use of our data sets but ask that users read and agree to our Data Use Agreement.

Data Use Agreement

Permission to download NTL-LTER data sets is granted to the Data User subject to the following terms:

  • The Data User must realize that these data sets are being actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact Emily Stanley, lead Principal Investigator, ( to check on other uses of the data. Where appropriate, the Data User may be encouraged to consider collaboration and/or co-authorship with original investigators.
  • The Data User must realize that the data may be misinterpreted if taken out of context. We request that you provide Emily Stanley, ATTN: Data Access, Center for Limnology, University of Wisconsin-Madison, 680 North Park St., Madison, WI 53706 with a copy of any manuscript using the data so that she may review and provide comments on the presentation of our data.
  • The Data User must acknowledge use of the data by an appropriate citation (see Citation) of the NTL-LTER database.

By using these data, the Data User agrees to abide by the terms of this agreement. Thank you for your cooperation.


Each data set landing page provides a citation suggestion. The format for this suggestion is based on international community agreements.

Data Availability

Our goal is to release all long term data associated with core research areas within 2 years of collection. These data and accompanying metadata will be available for download from the NTL-LTER web site.


While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The North Temperate Lakes LTER shall not be liable for damages resulting from any use or misinterpretation of data sets. Data users should be aware that we periodically update data sets.