Skip to main content
U.S. flag

An official website of the United States government

Mean Layer Temperature - UCAR (Upper Troposphere and Lower Stratosphere) CDR

Configuration Item ID: 01B-14

The Upper Troposphere and Lower Stratosphere Mean Layer Temperature (MLT) Climate Data Record (CDR) provides calibrated MLT data spanning both atmospheric regions. Input comes from the long-term variation of Brightness Temperature (BT) measurements from Advanced Microwave Sounder Unit (AMSU) channel 7 and Microwave Sounding Unit (MSU) channel 3 that peak in the upper troposphere and lower stratosphere. These peaks provide the necessary signal to produce the monthly MLT for both atmospheric regions. The AMSU Data (level-1b) is calibrated with high-quality radiosonde observations identified by coincident Global Positioning System (GPS) Radio Occultation (RO) temperature profile measurements. The calibrated MSU/AMSU data in the period of 2001-2014 serve as reference data to calibrate other overlapped MSU/AMSU data from 1980-2001. The final record has global coverage, and extends from 1986–2019.

To help the project receive continued support, updates, and improvement, tell us how you use Mean Layer Temperature - Upper Troposphere & Lower Stratosphere (UCAR) CDR data by completing our optional User Registration Form. 

Optional User Registration

Principal Investigator

Shu-peng Ben Ho, University Corporation for Atmospheric Research (UCAR)


Cite dataset when used as a source. See the dataset's landing page for citation details at doi:10.7289/V52F7KFQ.

Data Access