Feb. 10, 2023
編集担当：日本側コーディネーター
千葉大学環境リモートセンシング研究センター
市井和仁 ichii(at)chiba-u.jp

Arrived at Auckland University of Technology

iLEAPS-OzFlux joint conference 2023
The research platform "iLEAPS" (Integrated Land Ecosystem-AtmosphereProcesses Studies) is one of several Future Earthresearch initiatives, with the critical goal of bringing together researchers from a variety of ﬁelds related toland-atmosphere exchange processes. The 6th iLEAPS Science Conference in 2023 has been held Auckland, New Zealand,in conjunction with the yearly conference of the Australian/New Zealand Network for eddy covariance measurements(OzFlux).
Ichii's laboratory always pays attention to the land-atmosphere carbon cycle process, and actively participated in the"iLEAPS-OzFlux joint conference 2023" this time. The conference was delivered in a hybrid context, that being a mix ofphysical and virtual attendance. For more direct communication with the participants, Prof. Kazuhito Ichii and PhD
student Beichen Zhang brought the work progress of Geostataionary Satellite to the on-site in New Zealand.

A scene of Prof. Ichii's presentation

The conference was hosted at Auckland University of Technology's conference
venue for four days, from January 31 to February 3. It features several excellent
keynote presentations. Keynote speakers included Distinguished Professor
Graham Farquhar, on whose models the majority of current carbon cycle models
are based. The participants are also from well-known universities and researchteams, which is a valuable learning opportunity for young researchers. For ourgroup, Prof. Ichii spoke in the "5.2 Satellite-based vegetation monitoring,
emerging techniques" session with "Monitoring seasonal variations in terrestrial
vegetation activities across Southeast Asia using a geostationary satellite,
Himawari-8" as the title; Beichen Zhang presented "Evaluation of Himawari-8/AHI
surface reﬂectance using LEO sensors with off-nadir observation mode forterrestrial monitoring applications" in session "Satellite applications forbiosphere impact on atmospheric composition".

A scene of Beichen Zhang's presentation

Here are also various presentations from teams in Australia, China and Korea on
terrestrial applications using geostationary satellites. Our presentations greatlyattracted their interest. We exchanged in-depth discussions with several teams
during the tea break and after the conference. In particular, Prof. Xuanlong Mafrom Lanzhou University in China, who worked for a period of time at Universityof Technology Sydney, is currently preparing a joint collaboration with our teamon the terrestrial application aspects of geostationary satellites. We also had
discussions with Dr. Ankur Srivastava from the University of Technology Sydney
and Dr. Jiaqi Tian from the National University of Singapore and are looking
forward to future exchange and collaboration.

With this attending experience of iLEAPS-OzFlux 2023, our team (Ichii'sLaboratory) has established a favorable cooperation with various universityteams to maintain an active consensus in the ﬁeld of terrestrial application ofgeostationary satellites. Also, we expect to have more impact and gain morefrom future conferences and exchanges.
In addition, for the PhD student Beichen Zhang, the international platform andthe many outstanding presentations broaden his horizons and help him todevelop a balanced perception of scientiﬁc research. In terms of expertise, hefurthered understanding of how ﬂux data are observed and used, as well as thecommon gas (e.g., CO2, N2O and CH4) and carbon-cycles related modeling. By
interacting with numerous researchers, he recognized the importance oflandmark studies and research direction planning. This makes him moreenthusiastic and motivated about his research. (Chiba Univ. Beichen Zhang)

米国・メリーランド大学
訪問レポートCommunication during the tea break

米国・メリーランド大学の The Department of Atmosphericand Oceanic Science に ２ 週 間 滞 在 し、Jonathan Poterjoy
先生のグループにおいて研究活動を行ってきました。メリーランド大学は州立大学で、メリーランド州カレッジパークに位置しています。気象分野における国際的評価が非常に高いことが特徴の一つである大学です。
訪問先の研究室の指導教官である Poterjoy 先生は、米国のデータ同化研究において若手ながら非常に高い成果を残している著名な研究者であり、特に局所粒子フィルタの先進的な研究を行っていることで、世界的に注目されています。２週間の滞在の中で、Poterjoy 先生の研究チームによるゼミ、個別のミーティング、The Department ofAtmospheric and Oceanic Science 全体の講義を経験させていただきました。いずれも非常にハイレベルで白熱した議論を体感できた、非常に良い機会でした。
また、私の研究テーマである「リザバーコンピューティングを用いたデータ同化技術の改善」について Poterjoy先生の研究チームとの議論を通して、新たな実験やアルゴリズムを考案することができました。データ同化研究者のコミュニティでは誰もが知っている研究者達と同じ教室でゼミを行うことは、研究のインスピレーションを受けるだけでなく、研究に対するモチベーションが刺激されました。
（千葉大学 大瀧 貴也）