YMC-BSM in Vietnam

We have been conducting upper air ozone and water vapor soundings in Ho Chi Minh and Hanoi, Vietnam in collaboration with Vietnam Meteorological and Hydrological Administration. The purpose of this observation is to clarify the ozone and water vapor exchanges between the mid-latitude stratosphere and the tropical troposphere associated with the Asian summer monsoon circulation. We started the observation on June 29 at the Ho Chi Minh observatory and on July 2 in the Hanoi observatory, and have been launching the balloons once in two days at the both observatories.

Trial Launch

Saturday, July 14, 2018

Today, we conducted a trial launch to check the operation of receiver systems. The launch was succeeded and we can observe at 30km height!!

Another photo is the Padan dishes we ate yesterday. (tk)

Start of intensive observation at Laoag, Philippines

Laoag is a coastal city facing the South China Sea in the northwest of Luzon Island, Philippines. There is a weather station of PAGASA nearby Laoag International Airport, where SYNOP and twelve-hourly radiosonde observations are usually performed.

As a part of the YMC-BSM2018, JAMSTEC, PAGASA, and UP are jointly conducting an intensive observation campaign in July and August of 2018 at the weather station. It consists of six-hourly radiosonde sounding during the two-month period, X-band weather radar observation in August, and inter-comparison of radiosonde sensors manufactured by several companies.

I have visited Laoag and commemorated the start of the campaign by doing a kind of “balloon release” ceremony, using a balloon (with sensor/transmitter) for the first radiosonde observation :P.

The images are (upper left) the Laoag weather station, (lower left) “balloon release” ceremony, and (right) data of the first radiosonde.


YMC-BSM 2018 has been started !

YMC-BSM (Boreal Summer Monsoon study in) 2018  – one of the YMC’s Intensive Observation Periods – has been started since July 1, 2018. It will continue until the end of August, and various observations such as radiosonde atmospheric sounding and weather radar rainfall measurement will be conducted at  Laoag (Philippines), Aimeliik (Palau), Kototabang (Indonesia), Hanoi and Ho Chi Ming (Vietnam). In addition, three unmanned surface vehicles have been launched from Palau to study air-sea interaction in the Philippine Sea.

This campaign is conducted based on the collaboration with the local MC agencies, institutes, and universities including PAGASA, University of the Philippines (Philippines), Koror Weather Service Office (Palau), LAPAN (Indonesia), and National Hydro-Meteorological Service (Vietnam).

Since JAMSTEC colleagues visit those countries in a short period (because most observation will be done by the local collaborators), this blog may not cover successive topics from any specific site. Rather, it will be a collection of reports from various sites (and sometimes it may contain the report after he/she returns to Japan).

Cheers, KY