
From July 17th to 28th, 2023, the third (2023) China Ocean Color Theory and Remote Sensing Summer School was successfully held in Guiyang, Guizhou. This summer school is organized by the State Key Laboratory of Offshore Marine Environmental Science (Xiamen University), the State Key Laboratory of Lakes and Environment (Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences), and the State Key Laboratory of Satellite Marine Environmental Dynamics (Ministry of Natural Resources, the Second Institute of Oceanography), Key Laboratory of Space Ocean Remote Sensing and Applications of the Ministry of Natural Resources (National Satellite Ocean Application Center), Laoshan Laboratory, and Aerospace Hongtu Information Technology Co., Ltd. were jointly organized by 6 units. The summer school aims to consolidate the theoretical foundation of young students and scholars in the field of water color remote sensing in China, improve the practical ability of field experiments and observations, promote communication and exchanges among young researchers, and cultivate reserve forces for China's ocean color remote sensing scientific research. The summer school teaching team has a strong team, and has invited 27 outstanding experts in ocean color remote sensing and related fields at home and abroad, including Pan Delu, the academician of the Chinese Academy of Engineering, to give lectures, attracting more than 100 people from 59 domestic units to sign up. After strict selection by the organizing committee, a total of 34 students from 29 units were finally admitted. The teaching contents of this summer class are broadcast live on the entire network, enabling simultaneous communication online and offline. The maximum number of views for a single online course is 9,970, and the total number of views reaches 72,368.
On July 17, at the beginning of the summer school, Professor Li Zhongping hosted the memorial service for Researcher Liu Jianqiang. Researcher Liu Jianqiang is an important contributor to China's ocean satellite industry, an important participant in China's first ocean color satellite, and one of the founders of my country's ocean satellite ground system and business application system. Researcher Tang Junwu reviewed the life story and important contributions of Researcher Liu Jianqiang. All teachers and students of the summer school gave a minute of silence to grieve.
At the opening ceremony, Academician Pan Delu delivered a welcome speech and gave a report on "Artificial Intelligence Empowers the Development of Ocean Color Remote Sensing", inspiring young people to make hard efforts to make our country a technological power. He emphasized that trainees should uphold the spirit of seeking truth and strengthen the "raising questions and analyzing problems" —-problem-solving innovative critical thinking.

In the next 12 days, 26 experts taught the basics of ocean optics and radiation transfer theory (Tang Junwu, He Xianqiang), the relationship and inversion of apparent-intrinsic optical parameters (Li Zhongping), phytoplankton pigments and photosynthesis (Liu Xin), ocean color satellite data acquisition and processing (He Xianqiang, Ding Jing, Du Ping), ocean color remote sensing product applications and services (Bai Yan, Ma Ronghua, Shang Shaoling, Feng Lian, Cui Tingwei, Le Chengfeng, Xing Qianguo, Lu Yingcheng, Liu Yang, Bao Qingliu, etc.), on-site measurement method of optical parameters (Song Qingjun), bio-optical simulation (Wang Yuntao), polarization and ocean lidar remote sensing (Ma Hui, Liu Dong, Chen Peng, Li Zhengqiang), remote sensing inversion of water temperature (Guan Lei), AI oceanography (Li Xiaofeng), BGC-ARGO data acquisition and application (Xing Xiaogang), the relationship between climate system models and ocean color (Song Zhenya), and the challenges and prospects of ocean color remote sensing in the new era (Tang Junwu), etc.

This summer school also offers courses on cutting-edge science and technology of ocean color remote sensing. The polarization remote sensing brought by Professors Ma Hui and Li Zhengqiang makes it impossible for particulate matter in the atmosphere and ocean to escape; Professors Liu Dong and Chen Peng brought ocean lidar to help remote sensing detection break through the barrier of the ocean surface; researcher Bai Yan used remote sensing monitoring technology to quantitatively measure ocean carbon flux; Professor Li Xiaofeng's AI oceanography has surpassed traditional oceanography "peaks" one after another with massive data and powerful models... The above achievements all reflect that China's ocean color research has always maintained the cutting-edge science and technology.

During the course, teachers and students of the summer school spontaneously went into the mountains and rivers of the motherland. Under the leadership of researcher Tang Junwu and Professor Li Zhongping, they thought about how to measure the apparent optical properties of water and how to avoid solar flares during on-site measurements, and discussed how to take photos of light. The impact has deepened the understanding of remote sensing image processing knowledge.

On July 28, the closing ceremony of the summer class was held. The on-site teachers issued a completion certificate with the seal of all the teaching teachers to each student. Looking back on the past two weeks, the students all said that they had benefited a lot from the teachers’ wonderful teachings and serious and responsible professional attitudes. “The teachers not only gave them basic knowledge of ocean color remote sensing theory, but also guided everyone to actively and proactively think about problems in order to solve problems in various fields. Flexibly apply the knowledge learned in various scenarios.” One student even likened the training class to the "Parthenon of ocean color remote sensing" and described the teachers as "priests" full of wisdom who explained the classic ocean color theory and remote sensing algorithms. What makes the students particularly unforgettable is that this summer school provides everyone with a communication platform for free communication and collision of ideas; here, the students have made lovely, interesting and like-minded friends.

Amid applause and emotion, the third (2023) China Ocean Color Theory and Remote Sensing Summer School concluded successfully.