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YMC-BSM (Boreal Summer Monsoon study in) 2018

Overview
YMC-BSM 2018 is designed to study boreal summer monsoon by conducting various observations at selected sites, where local unique phenomena are often observed. One key topic is atmospheric convection associated with northward propagating Boreal Summer Intraseasonal Oscillation (BSISO). To study offshore propagation of diurnal cycle of rain and its relation to BSISO, Doppler radar will be deployed in the west coast of the northern Luzon, Laoag area, while radiosonde soundings will be enhanced both at Laoag and Koror, Palau. In addition, three autonomous unmanned surface vehicles will be launched from Palau to occupy 8/10/12N along 132E, where surface meteorology as well as ocean surface current will be measured to study air-sea interaction.
On the other hand, interaction between upper troposphere - lower stratosphere is intensively studied by launching special sondes equipped with ozone-sensor and high accurate hygrometer at Hanoi, Ho Chi Ming in Vietnam, and at Kototabang, Indonesia.
Period
July 1 - August 31, 2018
Participants
Indonesia - LAPAN, BMKG

 
Japan - JAMSTEC, Kyoto University, NME Ltd.
 
Palau - Koror Weather Service

 
Philippines - PAGASA, University of the Philippines

 
Vietnam - National Hydro-Meteorological Service

Area
Observation Network
Observations
 
   Philippines
PAGASA Laoag site
 
X-band Doppler radar(*1), Radiosonde(*2), GNSS-derived water vapor, Surface meteorology.
 
*1 ... Radar operation is performed only in August.
 
*2 ... Radiosonde soundings are conducted every 6 hours for entire 2 months. Intercomparison among several types of radiosonde will be performed.
 
 
   Palau
Radiosonde (4 times/day), Lidar, Disdrometer, Surface meteorology.
 
Three Unmanned Surface Vehicles (wave-glider) equipped with surface meteorological station, GNSS receiver, and ADCP will be launched from Palau to occupy 8/10/12N along 132E. Their location may change to look for meso-scale SST gradient.
 
 
 
 
   Indonesia
Equatorial Atmosphere Observatory at Kototabang
 
Equatorial Atmosphere Radar (EAR), CFH-Ozone-CPS sonde (10 times during July 13-27)
   Vietnam
VHMS Hanoi & Ho Chi Minh sites
 
Ozone sonde (15 times at each site)
Numerical Modeling
During the IOP, numerical forecast using NICAM will be performed. See more NICAM page