A Building Block Urban Meteorological Observation Experiment (BBMEX) over Seoul City, Korea
Abstract
For the purpose of understanding the detailed distribution of surface and air temperatures in a high-rise building block, a 3-dimensional Building-Block Meteorological observation EXperiment (BBMEX) campaign has been carried out over typical commercial area (Gwanghwamun) in Seoul Metropolitan Area, Korea during the heat-wave and tropical night periods (5-6 August) in 2019. Several types of fixed and mobile instruments were deployed in the experiment domain: A thermal infrared imager (TIR) monitored the surface temperature with 320×240 pixels including building wall, road, sidewalks at every 10 min; 6 automatic weather stations obtained air temperature and relative humidity, and wind speed and direction at every 1 min; a mobile weather vehicle (MOVE4) monitored road surface temperatures and 4-components of radiation at 1 s on roadway; a mobile cart for meteorological observation (MCMO) monitored surface, 0.5m, 1.5m, and 2.5m air temperatures at 1 s on the sidewalk and square. The TIR exhibited that east-face of a building was strongly heated during the morning time, while horizontal surface was strongly heated near noon. Air temperatures at 2 m high in 2×2 km2 exhibited 1.5 ° temperature range at 06 LST, while 4.0 ° temperature range at 15 LST on 6 August 2019, depending on the location of site in building blocks. Air temperatures in Gwanghwamun Square were 1.5-1.7 ° and 0.1-2.2 ° higher than those observed at the Seoul synoptic station (1 km apart) in night and day, respectively. Surface and 0.5, 1,5, and 2.5m temperatures was 49.1 °, 38.7 °, 38.1 °, and 37.9 °, respectively, at 1500 LST on 6 August 2019, when the hottest air temperature in the year 2019 (36.9 °) was recorded at the Seoul station. Surface and air temperatures were found to be affected by many factors in a building-block such as shades, trees, building height and density, aspect ratio of building canyon, sky-view, ground-fountain, waterway, etc.
- Publication:
-
EGU General Assembly Conference Abstracts
- Pub Date:
- May 2020
- DOI:
- 10.5194/egusphere-egu2020-6797
- Bibcode:
- 2020EGUGA..22.6797P