These files contain 24-hour periods of retrieved thermodynamic profiles derived from observations collected by the CLAMPS2 Atmospheric Emitted Radiance Interferometer (AERI). These retrievals were processed in the IDL (e.g., the AERIoe version) of the TROPoe algorithm (see Turner and Loehnert 2014; Turner and Blumberg 2019). These data were collected during the SPLASH-SAIL project. Quicklook imagery included in QL.zip. The AERI consists of a Fourier transform interferometer, scene scanning-optics, IR detector, calibration blackbodies, and instrument control hardware. The exact system design and extensive theory of operation can be found in Knuteson et al. (2004). On a clear sky day it is capable of measuring IR radiances throughout the depth of the atmosphere with a wavenumber resolution 1 cm-1 and temporal resolution of ~20 seconds. The AERI has an absolute accuracy of < 1% of the ambient blackbody radiance and has typical noise < 0.2 mW ( m2sr cm-1) -1. The instrument is not able to collect observations in precipitation and when precipitation is detected a mechanical hatch is closed to protect the instrument. The radiances collected by the AERI contain information that can be used to obtain profiles of temperature, water vapor and trace gases as well as basic cloud properties. Complete detail included in the README file.

A climatology from soundings from Denver, Colorado was used to generate a prior for thesw retrievals; note the prior was re-centered using monthly mean integrated water vapor values from radiosondes released during the SPLASH/SAIL project at Gothic (see Adler et al. 2023). AERI noise was increased by a factor of 2 to avoid overfitting. Radiances from the AERI in the following wavenumber bands were used in the retrievals: 538.0-588.0, 612.0-618.0, 624.0-660.0, 674.0-713.0, 713.0-722.0, 860.1-864.0, 872.2-877.5, 898.2-905.4 cm-1. Temperature and water vapor observations from a surface station and RAP analysis temperature and water vapor profiles above 4 km are also used in the retrievals. Cloud-based height information from a Doppler lidar was included as well. The retrieved profiles are available every 10 minutes.