README FILE - SWEX 2022 Radiosondes Santa Barbara County Fire Department Headquarters (HQ) Title: Radiosondes at Santa Barbara County Fire Department Headquarters (SBC FD HQ) and Montecito (IOP 10) [UCSB] Prepared by: Gert-Jan Duine, ERI UC Santa Barbara, duine@eri.ucsb.edu and Callum Thompson, ERI UC Santa Barbara, callum@eri.ucsb.edu Co-authors: Leila Carvalho, Dept. Geography, UCSB (leila@eri.ucsb.edu) Craig Clements, SJSU (craig.clements@sjsu.edu) Charles Jones, Dept. Geography, UCSB (cjones@eri.ucsb.edu) Daisuke Seto, ERI, UCSB (d_seto@ucsb.edu) Callum Thompson, ERI, UCSB (callum@eri.ucsb.edu) 1.0 Data set description This dataset concerns the preliminary data of the radiosondes launched at Santa Barbara County Fire Department Headquarters (HQ) during the SWEX field experiment 2022. Note that for IOP 10 the radiosondes were launched from Montecito fire station 2. Data version : v0.1 (2023/02/23) Data status : Preliminary Time period : April 4 2022 to May 13 2022 Physical location : All IOPs: Santa Barbara County Fire Department Headquarters (HQ) 34.45125 N -119.76978 E 81 meters above MSL : IOP 10: Montecito Fire staton 2 34.440297 N -119.659388 E 145 meters above MSL Data Frequency : 2 second interval 2.0 Instrument description This is a conventional radiosonde system with outputs of pressure, temperature, relative humidity, dew point, wind speed, wind direction, geopotential height. The system uses the GRAW sondes using the CSU-MAPS (Clements & Oliphant 2014). Sondes used were DFM-09. The same system was used for the SWEX pilot study at the same location (Carvalho et al. 2020) Temperature resolution : 0.1 deg C Temperature accuracy : < 0.2 deg C Relative humidity resolution : 1 % Relative humidity accuracy : < 4 % Pressure accuracy : < 0.3 hPa Geopotential height accuracy : < 20 m Wind speed accuracy : < 0.5 m/s Accuracy horizontal position : < 10 m Frequency : 0.5 Hz 3.0 Data Collection and Processing Data was collected to support intensive operations during SWEX. During SWEX, 8 radiosondes were launched per IOP. The proposed reference schedule was (PDT): 10:00, 13:00, 16:00, 19:00, 22:00, 01:00, 04:00, 07:00 PDT During some IOPs, less or more frequent launches were performed, depending on the IOP conditions and planned operations: IOP 1: 7 launches. IOP 2: 4. IOP 3: 8. IOP 4: 6. IOP 5: 8. IOP 6: 8. IOP 7: 3. IOP 8: 10. IOP 9: 9. IOP 10: 4 (from Montecito fire station #2) EOP 1: 8 launches. EOP 2: 8 launches. EOP 3: 10 launches. 4.0 Data Format File name : HQ_IOP (or EOP)x_Month_Day_Hour(PDT).txt Note that hour in the file name is in PDT (Pacific local Time) whereas the time in UTC is shown in the second column of the file Format: txt Variables: Time [sec] Time (UTC) P [hPa] T [Celsius] Relative humidity [%] Wind speed [m/s] Wind direction [degrees] Zonal Windspeed U [m/s] Meridional Wind Speed V [m/s] Geopotential [m] Dew Point [Celsius] 5.0 Data Remarks IOP 10 sondes were released from a different location, notably the Montecito fire station 2. References: Clements, Craig B., and Andrew J. Oliphant. "The California State University Mobile Atmospheric Profiling System: A facility for research and education in boundary layer meteorology." Bulletin of the American Meteorological Society 95.11 (2014): 1713-1724. https://journals.ametsoc.org/view/journals/bams/95/11/bams-d-13-00179.1.xml?tab_body=abstract-display Carvalho, L.M., Duine, G.-J., Jones, C., Zigner, K., Kane, H., Gore, C., Bell, G., Gamelin, B., Gomberg, D., Hall, T., Johnson, M., Dumas, J., Boldt, E., Hazard, R., Enos, W., 2020. The sundowner winds experiment (SWEX) pilot study: Understanding downslope windstorms in the santa ynez mountains, Santa Barbara, California. Mon. Wea. Rev. 148 (4), 1519-1539. http://refhub.elsevier.com/S2212-0947(22)00062-7/sb5