2026-08-04T09:56:50Z
https://www.fdr.uni-hamburg.de/oai2d
oai:fdr.uni-hamburg.de:10212
2024-02-27T09:04:47Z
user-icdc
user-uhh
true
3.1
UHH.FDR
10.25592/uhhfdm.10212
Turner, Dave
0000-0003-1097-897X
NOAA Global Systems Laboratory
Rochette, Luc
LRtech
Thermodynamic retrieved profiles from the ASSIST infrared spectrometer, FESSTVaL campaign
Universität Hamburg
2022
Infrared spectrometer
ASSIST
thermodynamic profiles
optimal estimation
FESSTVaL
SAMD
measurement
2022-05-18
en
https://www.fdr.uni-hamburg.de/record/oai:fdr.uni-hamburg.de:10212
10.25592/uhhfdm.10211
01
Creative Commons Attribution 4.0 International
Open Access
<p>This dataset contains thermodynamic profiles retrieved from the ground-based infrared spectrometer called the ASSIST. The ASSIST was located at the "MOLRAO" location at the DWD's Lindenberg site. The primary retrieved variables are T(z), q(z), liquid water path, and effective radius. The uncertainties of these variables are provided, as well as a full error covariance matrix. Most of the information from the ASSIST observation is in the lowest 2 km; the "cumulative degrees of freedom" fields (cdfs_temperature and cdfs_watervapor) provide a quantitative description of this information with height. The data structure follows the standard DOE Atmospheric Radiation Measurement (ARM) program's data format. To get the time for the samples, add "base_time" to "time_offset" to get the number of seconds since 1 Jan 1970 at 00:00:00 UTC.</p>
<p><strong>Quality</strong>: There are uncertainty profiles for all of the retrieved variables in the netCDF files. However, the information content in the ASSIST observations decreases rapidly with height; profile quantifies above 3 km should be used with care. Also, if the retrieved LWP > 10 g/m2, then there will be very little-to-no information on the temperature and humidity profile above the cloud base height. I also recommend only using retrievals wherein the RMSr field is less than 8 and gamma field is less than 5. All of these variables are in the netCDF file.</p>
<p><strong>Parameters</strong>: temperature, waterVapor, LWP, ReffL</p>
<p><strong>Funding</strong>: LRtech provided the instrument to FESSTVaL free of charge. The retrievals were performed under the auspices of the NOAA Atmospheric Science for Renewable Energy program</p>
Project: FESSTVaL (Field Experiment on submesoscale spatio-temporal variability in Lindenberg), a measurement campaign initiated by the Hans-Ertel-Center for Weather Research.