日本地球惑星科学連合2019年大会

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[J] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS04] 大気化学

2019年5月30日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:中山 智喜(長崎大学 大学院水産・環境科学総合研究科)、岩本 洋子(広島大学 生物圏科学研究科)、豊田 栄(東京工業大学物質理工学院)、江口 菜穂(Kyushu University)

[AAS04-P25] インドネシア・ジャカルタ大都市圏周辺における温室効果ガス・大気汚染物質の総合観測プロジェクト

*西橋 政秀1向井 人史1寺尾 有希夫1橋本 茂1Rizaldi Boer2Muhammad Ardiansyah2Bregas Budianto2Gito Sugih Immanuel2Adi Rakhman2Rudi Nugroho3Nawa Suwedi3Agus Rifai3Iif Miftahul Ihsan3Anies Marufatin3Albert Sulaiman3Dodo Gunawan4Eka Suharguniyawan4Asep Firman Ilahi4Muharam Syam Nugraha4Ronald Christian Wattimena4Bayu Feriaji4Thomas Lauvaux5小田 知宏6 (1.国立環境研究所、2.ボゴール農科大学、3.インドネシア技術評価応用庁、4.インドネシア気象気候地球物理庁、5.LSCE、6.USRA/NASA)

キーワード:温室効果ガス、大気汚染物質、都市観測、インドネシア

The emission increases of greenhouse gases (GHGs) and air pollutants in megacities have been recognized as one of the important issues as a concern for health and climate change. Jakarta, the capital city of Indonesia, including suburban cities (Bogor, Depok, Tangerang, and Bekasi; locally known as “Jabodetabek”), has a population of 32 million people and has been listed as the second largest megacity in the world and the largest megacity in Southeast Asia. Several air quality monitoring campaigns were conducted in Jakarta. However, previous studies lacked continuous high-accuracy monitoring stations due to the limitations of environmental monitoring budgets and experts. We present here a new interdisciplinary project to expand our current understanding of the interactions between emissions, air quality, and regional/global climates.
To estimate the amount of anthropogenic emissions from Jakarta megacity and compare with city activities, we developed a ground-based comprehensive monitoring system of GHGs and air pollutants controlled remotely in addition to automated start-and-stop operations during power failures. Monitoring systems were installed at Bogor (center of Bogor city), Serpong (Jakarta suburb), and Cibeureum (mountainous area) in 2016–2017. Each monitoring system consists of system control/data acquisition units controlling multiple instruments and collecting continuously and continuous monitoring instruments of CO2, CH4, CO, NOx, SO2, O3, aerosol concentrations (PM2.5, PM10, BC) and the chemical components (NO3-, SO42-) of PM2.5 and PM10, and meteorological parameters. Flask sampling of air is also performed automatically once a week to analyze N2O, SF6, and carbon isotopes (13C, 14C) in CO2 in NIES and to validate the continuous measurement data of CO2, CH4, and CO.
The results show that the daytime values of CO2, three hours averages from 12 to 15 local time, at Bogor and Serpong are 6.8 and 7.1 ppm higher than Cibeureum, respectively. These features are also presented in the other species, i.e., CO, NOx, SO2, PM2.5, PM10-2.5, and BC. Moreover, we found 5–10 ppm lower values of CO2 during daytime at Bogor and Serpong in December and January, mid-rainy season in Jakarta, compared with the other months and frequent and extremely high CH4 enhancements during nighttime (i.e., 3 to 5 ppm) at Serpong.
We present here the temporal variability observed at three monitoring sites and some preliminary results based on high-resolution CO2 simulations using Weather Research and Forecasting model coupled to Chemistry (WRF-Chem).