[{"title":"Tethersonde mean meteorology from the high-Arctic ASCOS expedition 2008","summary":"In-situ boundary-layer meteorological observations were made from the ice using sensors hanging under a tethered balloon which was quasi-continuously winched up and down in the ~0 \u2013 600 m layer. The sensor package consisted of a sonic anemometer in an aerodynamic housing and sensors for mean temperature and relative humidity, as well as sensor package movement and orientation. An aerosol sensor was also included and a camera set to take low-rate time lapse photos hang under the tethered balloon. The data include one set of mean profiles and one set of turbulent kinetic energy-dissipation rate; a measure of turbulence derived from the inertial sub-range of wind speed power spectra.","citations":"Tjernstr\u00f6m, M. et al. 2014. The Arctic Summer Cloud Ocean Study (ASCOS): overview and experimental design. Atmospheric Chemistry and Physics, 14, 2823\u20132869. DOI:10.5194\/acp-14-2823-2014","comments":"To obtain in-situ boundary-layer observations through a deeper layer, a sensors package was deployed hanging under a tethered balloon, and was quasi-continuously winched up and down in the ~0 \u2013 600 m layer. These measurements were only interrupted when weather conditions with dense fog persisted for long periods of time since this was detrimental for the polar-bear watch. The winch was located in \u201cMet Alley\u201d (see Micrometeorology) which this was one (of two) reason why this site was continuously manned. \nThe sensor package consisted of a Gill sonic anemometer in an aerodynamic housing and sensors for mean temperature and relative humidity, as well a sensor package movement and orientation. A CLASP aerosol sensors was also included but its inlet often froze up when the package was inside clouds. A camera set to take low-rate time lapse photos also hang under the tethered balloon.\nThe data provided include one set of mean profiles and one set of TKE-dissipation rate; a measure of turbulence derived from the so-called inertial sub-range of wind speed power spectra.Original address: http:\/\/www.ascos.se\/index.php?q=node\/254\n\n\nFiles:\nall_TS10.zip (3.68 MB)\n\n","category":"Atmosphere","subcategory":"Weather observations","keywords":"ASCOS; Meteorology; High Arctic; Arctic boundary layer; Arctic clouds; Tethered sonde profiles","scientist":"Ian Brooks","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":"Completed","language":"English","project":"Arctic Summer Cloud-Ocean Study 2008 (Ascos)","publisher":"Bolin Centre Database","version":"1.0","constrains":"None","access":"Free"}]