[{"name":"oden-artofmelt-2023-microwave-profiles-1","title":"Temperature and humidity profiles from microwave radiometer during expedition ARTofMELT, Arctic Ocean, 2023","summary":"Profiles of temperature and humidity are obtained from an RPG HATPRO5 microwave radiometer deployed on the roof of a container on the 4th deck of Oden during the expedition ARTofMELT (Atmospheric Rivers and the Onset of Arctic Melt) in the Fram Strait, operating continuously from 7 May, 2023, until 14 June, 2023.\r\n\r\nThe data include observations from different measurement modes, with different accuracy and resolution, as well as a set of corrected data where the radiosoundings were used as ground truth. \r\n\r\nAn associated dataset, containing the raw data from the microwave profiler, is available separately.","citations":"Tjernstr\u00f6m M, Murto S, Karalis M, Prytherch J (2024) Temperature and humidity profiles from microwave radiometer during expedition ARTofMELT, Arctic Ocean, 2023 \u2014 raw data. Dataset version 1. Bolin Centre Database. https:\/\/doi.org\/10.17043\/oden-artofmelt-2023-microwave-profiles-raw-1\r\n\r\nTjernstr\u00f6m M, Murto S (2024) Scripts for concatenating, processing NetCDF native output files and creating final netCDF files from HATPRO microwave-profiler observations, from the expedition ARTofMELT, Arctic Ocean, 2023. Software version 1.0.0. Bolin Centre Code Repository. https:\/\/doi.org\/10.57669\/oden-artofmelt-2023-microwave-profiles-1.0.0","comments":"##### Measurement system\r\nThe data is obtained from an RPG HATPRO5 microwave radiometer. This is a passive instrument detecting microwave radiation emitted by the atmosphere in a number of wavelengths. Profiles of temperature and humidity are retrieved from the microwave irradiances using a proprietary neural network, trained on reanalysis of Arctic profiles (ERA5).\r\n\r\nThe instrument has two modes of observing: vertical stare and scanning in the vertical. For the vertical-stare mode, well-defined weighting functions are utilized by scanning over several nearby frequencies. When the instrument is scanning in the vertical, the atmospheric path is progressively increased as the zenith angle increases and the maxima of the weighting functions are thereby shifted lower, hence increasing the resolution in the lower parts of the atmosphere. The latter is sometimes referred to as a \"boundary-layer mode\".\r\n\r\nThe normal continuous mode for the instrument is the vertical stare. Every 15 minutes, this is briefly interrupted by the vertical-scan mode; however, this is only relevant for temperature profiles. Hence, all high-temporal resolution data are summarized in one file along with a \"best estimate\" temperature and the humidity profiles. while a separate datafile at lower temporal resolution contains the vertical scan data.\r\n\r\n##### Quality control\r\nIn additional derived data, the radiometer profiles were corrected by comparisons to radiosounding data. No other data quality control is applied, except for adding the instrument height to the altitude variable.\r\n\r\n##### Associated raw data and code\r\nThe raw data, from which this dataset is derived, was created by [Tjernstr\u00f6m et al. (2024)](https:\/\/bolin.su.se\/data\/oden-artofmelt-2023-microwave-profiles-raw-1) and is available separately. The current dataset is the concatenation of the original NetCDF files from the instrument system. Computer codes, in Matlab and Python, written by [Tjernstr\u00f6m and Murto  (2024)](https:\/\/git.bolin.su.se\/bolin\/oden-artofmelt-2023-microwave-profiles), used to derive this dataset in NetCDF format from the instrument data files are also available.\r\n\r\n##### Data creators' roles\r\nThe instrument system was continuously logging and was monitored by the Stockholm University Meteorology team onboard Oden:\r\n- Michael Tjernstr\u00f6m (chief scientist and dataset creator)\r\n- Sonja Murto (operator)\r\n- Michail Karalis (operator)\r\n\r\nJohn Prytherch (also Stockholm University) is responsible for the instrument system.\r\n\r\n##### The expedition\r\nData were collected during the ARTofMELT 2023 expedition on board the Swedish icebreaker Oden, which was organized by the [Swedish Polar Research Secretariat](https:\/\/www.polar.se\/en\/expeditions\/previous-expeditions\/arctic\/artofmelt-2023\/) from 8 May through 14 June, 2023.","category":"Atmosphere","subcategory":"Weather observations","keywords":"Atmospheric profiling; Temperature; Humidity; Microwave profiling; Arctic; Arctic Ocean; ARTofMELT; ARTofMELT 2023 expedition; Icebreaker Oden","scientist":"Michael Tjernstr\u00f6m, Sonja Murto, Michail Karalis, John Prytherch","firstname":"Michael","lastname":"Tjernstr\u00f6m","address":"Department of Meteorology; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere","location":"Ocean > Arctic Ocean","progress":"","language":"English","project":"ARTofMELT expedition in spring 2023. This dataset was collected with instruments that are part of \"Oden as a National Infrastructure\", funded by the Swedish Infrastructure Council (RFI: 2021-00153) and also funded by the Knut and Alice Wallenberg Foundation (Grant 2016-0024). The project ARTofMELT was funded by the Swedish Research Council (VR: 2022-03052).","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]