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.

ゾンデセンサー放球!

2018年7月16日(月):曇り時々雨のち晴れ!

てるてる坊主&晴れ男(女)観測員が本領を発揮し(?)、午後、雨は無事上がり、ゾンデセンサーを放球できました!

観測当日の準備は、放球時間の2時間ほど前から開始。各ゾンデを調整し、ひとつに組み上げます。
ある程度組み上げたら、空をみて放球可能か確認。気球の準備(水素ガス入れ)を開始するか判断します。
気球とゾンデセンサー群の準備ができたら、データが受信できているか確認。そして放球!

今日は、気球が破裂した高度31kmまで、データを取ることができました。
今日の気球、上昇速度はおよそ3m/s。小走りの速度でした。31kmまで長旅をありがとう。(JS)

晴れ待ち

2018年7月15日(日):曇り時々雨(のち晴れを希望)

インドネシア・コトタバンにある赤道大気レーダーサイトでは、本日、夕方に、ゾンデ放球をおこなう予定です。
雨や、上空に水雲があるときには、放球できないセンサーがあるため、ときどき空の状況を確認します。

いま、ざんざん降りの雨が降っています。
昨日つるした、てるてる坊主と、自称晴れ男(女)観測員の真価が問われています。

放球予定時間まで、あと4時間。
どうか雨がやみますように。(JS)

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)

試験放球

2018年7月14日(土):晴れ時々くもり

本日は、受信機の挙動を確認するため、試験放球を行いました。観測は無事成功し、高度30kmまで到達しました!

もう1枚の写真は、初日に食べたパダン料理です。(tk)

インドネシア・赤道大気レーダーサイト到着

2018年7月13日(金):雲が見えるも基本的には晴れ

 

初めて赤道大気レーダーサイトに来ました。信楽のMUレーダーに比べると、より間近に八木アンテナを確認することが出来ます。今日ー明日は受信機等の設置を行い、明後日から観測開始予定です。もう1枚の写真は航空機内で食べた限定アイスです。(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.

SY

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