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Input optics systems of the KAGRA detector during O3GK (vol 2023, 023F01, 2023)

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2023年第5期2023卷

作者： Akutsu, T. Ando, M. Arai, K. Arai, Y. Araki, S. Araya, A. Aritomi, N. Asada, H. Aso, Y. Bae, S. Bae, Y. Baiotti, L. Bajpai, R. Barton, M. A. Cannon, K. Cao, Z. Capocasa, E. Chan, M. Chen, C. Chen, K. Chen, Y. Chiang, C-I Chu, H. Chu, Y-K Eguchi, S. Enomoto, Y. Flaminio, R. Fujii, Y. Fujikawa, Y. Fukunaga, M. Fukushima, M. Furuhata, T. Gao, D. Ge, G-G Ha, S. Hagiwara, A. Haino, S. Han, W-B Hasegawa, K. Hattori, K. Hayakawa, H. Hayama, K. Himemoto, Y. Hiranuma, Y. Hirata, N. Hirose, E. Hong, Z. Hsieh, B-H Huang, G-Z Huang, H-Y Huang, P. Huang, Y-C Huang, Y-J Hui, D. C. Y. Ide, S. Ikenoue, B. Imam, S. Inayoshi, K. Inoue, Y. Ioka, K. Ito, K. Itoh, Y. Izumi, K. Jeon, C. Jin, H-B Jung, K. Jung, P. Kaihotsu, K. Kajita, T. Kakizaki, M. Kamiizumi, M. Kanbara, S. Kanda, N. Kang, G. Kataoka, Y. Kawaguchi, K. Kawai, N. Kawasaki, T. Kim, C. Kim, J. Kim, J. C. Kim, Ws Kim, Y-M Kimura, N. Kita, N. Kitazawa, H. Kojima, Y. Kokeyama, K. Komori, K. Kong, A. K. H. Kotake, K. Kozakai, C. Kozu, R. Kumar, R. Kume, J. Kuo, C. Kuo, H-S Kuromiya, Y. Kuroyanagi, S. Kusayanagi, K. Kwak, K. Lee, H. K. Lee, H. W. Lee, R. Leonardi, M. Li, K. L. Lin, L. C-C Lin, C-Y Lin, F-K Lin, F-L Lin, H. L. Liu, G. C. Luo, L-W Majorana, E. Marchio, M. Michimura, Y. Mio, N. Miyakawa, O. Miyamoto, A. Miyazaki, Y. Miyo, K. Miyoki, S. Mori, Y. Morisaki, S. Moriwaki, Y. Nagano, K. Nagano, S. Nakamura, K. Nakano, H. Nakano, M. Nakashima, R. Nakayama, Y. Narikawa, T. Naticchioni, L. Negishi, R. Quynh, L. Nguyen Ni, W-T Nishizawa, A. Nozaki, S. Obuchi, Y. Ogaki, W. Oh, J. J. Oh, S. H. Ohashi, M. Ohishi, N. Ohkawa, M. Ohta, H. Okutani, Y. Okutomi, K. Oohara, K. Ooi, C. Oshino, S. Otabe, S. Pan, K-C Pang, H. Parisi, A. Park, J. Arellano, F. E. Pena Pinto, I. Sago, N. Saito, S. Saito, Y. Sakai, K. Sakai, Y. Sakuno, Y. Sato, S. Sato, T. Sawada, T. Sekiguchi, T. Sekiguchi, Y. Shao, L. Shibagaki, S. Shimizu, R. Shimoda, T. Shimode, K. Shinkai, H. Shishido, T. Shoda, A. Somiya, K. Son, E. J. Sotani, H. Sugimoto, R. Suresh, J. Suzuki, T. Suzuki, T. Tagoshi, H. Takahashi, H Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Research Center for the Early Universe The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Institute for Cosmic Ray Research KAGRA Observatory The University of Tokyo 5-1-5 Kashiwa-no-Ha Kashiwa City Chiba 277-8582 Japan Accelerator Laboratory High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Earthquake Research Institute The University of Tokyo 1-1-1 Yayoi Bunkyo-ku Tokyo 113-0032 Japan Department of Mathematics and Physics Graduate School of Science and Technology Hirosaki University 3 Bunkyo-cho Hirosaki Aomori 036-8561 Japan Kamioka Branch National Astronomical Observatory of Japan 238 Higashi-Mozumi Kamioka-cho Hida City Gifu 506-1205 Japan The Graduate University for Advanced Studies (SOKENDAI) 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Korea Institute of Science and Technology Information 245 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea National Institute for Mathematical Sciences 70 Yuseong-daero 1689 Beon-gil Yuseong-gu Daejeon 34047 Republic of Korea International College Osaka University 1-1 Machikaneyama-cho Toyonaka City Osaka 560-0043 Japan School of High Energy Accelerator Science The Graduate University for Advanced Studies (SOKENDAI) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Department of Astronomy Beijing Normal University Xinjiekouwai Street 19 Haidian District Beijing 100875 China Department of Applied Physics Fukuoka University 8-19-1 Nanakuma Jonan Fukuoka City Fukuoka 814-0180 Japan Department of Physics Tamkang University No. 151 Yingzhuan Road Danshui Dist. New Taipei City 25137 Taiwan Department of Physics

KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25 to March 10, 2020, and its first joint observation with the GEO 600 detector from April 7 to April 21, 2020 (O3GK). This study presents an overview of the input optics systems of the KAGRA detector, which consist of various optical systems, such as a laser source, its intensity and frequency stabilization systems, modulators, a Faraday isolator, mode-matching telescopes, and a high-power beam dump. These optics were successfully delivered to the KAGRA interferometer and operated stably during the observations. The laser frequency noise was observed to limit the detector sensitivity above a few kilohertz, whereas the laser intensity did not significantly limit the detector sensitivity.

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Recent Improvements in the Dart Model for Atmosphere, Topography, Large Landscape, Chlorophyll Fluorescence, Satellite Image Inversion

Recent Improvements in the Dart Model for Atmosphere, Topogr...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： J.P. Gastellu-Etchegorry Y. Wang O. Regaieg T. Yin Z. Malenovsky Z. Zhen X. Yang Z. Tao L. Landier A. Al Bitar Deschamps N. Lauret J. Guilleux E. Chavanon B. Cao J. Qi A. Kallel Z. Mitraka N. Chrysoulakis B. Cook D. Morton Université de Toulouse CESBIO - UPS CNES CNRS IRD Toulouse France Earth System Science Interdisciplinary Center University of Maryland College Park MD USA School of Technology Environments and Design University of Tasmania Hobart Australia College of Geo-Exploration Science and Technology Jilin University Changchun China Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing China Key Laboratory of Geographical Information Science East China Normal University Shanghai China CNES Toulouse France Beijing Forestry University Beijing China CRNS ATMS Sfax Tunisia Foundation for Research and Technology Hellas (FORTH) Heraklion Greece NASA Goddard Space Flight Center Greenbelt MD USA

ISBN: (数字)9781728163741

ISBN: (纸本)9781728163758

Physical models simulating the radiative budget (RB) and remote sensing (RS) observation of three-dimensional (3D) landscapes are critical to better understand human and natural components of the Earth system and further develop RS technology. DART is one of the most comprehensive 3D models of Earth-atmosphere optical radiative transfer (RT), from ultraviolet (UV) to thermal infrared (TIR). It simulates the optical signal of proximal, aerial and satellite imaging spectrometers and laser scanners, the 3D RB and solar induced chlorophyll fluorescence (SIF) signal, for any urban or natural landscape and any experimental or instrument configuration. It is freely available for research and teaching activities (https://***). Here, five recent advances are presented. 1) Atmosphere RT. 2) RT in non repetitive topography. 3) Monte Carlo modelling for fast RS image simulation of large landscapes. 4) SIF modelling for vegetation simulated as facets and turbid cells. 5) RS image inversion for mapping the optical properties of urban material and the urban radiative budget.

关键词： Atmospheric modeling Three-dimensional displays Terrestrial atmosphere Earth Satellites Computational modeling Surface topography

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Presolar stardust in asteroid Ryugu

arXiv

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arXiv 2022年

作者： Barosch, Jens Nittler, Larry R. Wang, Jianhua O'D. Alexander, Conel M. De Gregorio, Bradley T. Engrand, Cécile Kebukawa, Yoko Nagashima, Kazuhide Stroud, Rhonda M. Yabuta, Hikaru Abe, Yoshinari Aléon, Jérôme Amari, Sachiko Amelin, Yuri Bajo, Ken-Ichi Bejach, Laure Bizzarro, Martin Bonal, Lydie Bouvier, Audrey Carlson, Richard W. Chaussidon, Marc Choi, Byeon-Gak Cody, George D. Dartois, Emmanuel Dauphas, Nicolas Davis, Andrew M. Dazzi, Alexandre Deniset-Besseau, Ariane Rocco, Tommaso Di Duprat, Jean Fujiya, Wataru Fukai, Ryota Gautam, Ikshu Haba, Makiko K. Hashiguchi, Minako Hibiya, Yuki Hidaka, Hiroshi Homma, Hisashi Hoppe, Peter Huss, Gary R. Ichida, Kiyohiro Iizuka, Tsuyoshi Ireland, Trevor R. Ishikawa, Akira Ito, Motoo Itoh, Shoichi Kamide, Kanami Kawasaki, Noriyuki Kilcoyne, David A.L. Kita, Noriko T. Kitajima, Kouki Kleine, Thorsten Komatani, Shintaro Komatsu, Mutsumi Krot, Alexander N. Liu, Ming-Chang Martins, Zita Masuda, Yuki Mathurin, Jérémie McKeegan, Kevin D. Montagnac, Gilles Morita, Mayu Mostefaoui, Smail Motomura, Kazuko Moynier, Frédéric Nakai, Izumi Nguyen, Ann N. Ohigashi, Takuji Okumura, Taiga Onose, Morihiko Pack, Andreas Park, Changkun Piani, Laurette Qin, Liping Quirico, Eric Remusat, Laurent Russell, Sara S. Sakamoto, Naoya Sandford, Scott A. Schönbächler, Maria Shigenaka, Miho Suga, Hiroki Tafla, Lauren Takahashi, Yoshio Takeichi, Yasuo Tamenori, Yusuke Tang, Haolan Terada, Kentaro Terada, Yasuko Usui, Tomohiro Verdier-Paoletti, Maximilien Wada, Sohei Wadhwa, Meenakshi Wakabayashi, Daisuke Walker, Richard J. Yamashita, Katsuyuki Yamashita, Shohei Yin, Qing-Zhu Yokoyama, Tetsuya Yoneda, Shigekazu Young, Edward D. Yui, Hiroharu Zhang, Ai-Cheng Abe, Masanao Miyazaki, Akiko Nakato, Aiko Nakazawa, Satoru Nishimura, Masahiro Okada, Tatsuaki Saiki, Takanao Tanaka, Satoshi Terui, Fuyuto Tsuda, Yuichi Watanabe, Seiichiro Yada, Toru Yogata, Kasumi Yoshikawa, Makoto Nakamura, Tomoki Naraoka, Hiroshi Noguchi, Takaaki Okazaki, Ryuji Sakamoto, Kanako Tachibana, Shogo Yurimoto, Hisayoshi Earth and Planets Laboratory Carnegie Institution of Washington 5241 Broad Branch Rd. NW WashingtonDC20015 United States Materials Science and Technology Division US Naval Research Laboratory WashingtonDC20375 United States IJCLab UMR 9012 Université Paris-Saclay CNRS Orsay91405 France Faculty of Engineering Yokohama National University Kanagawa Yokohama240-8501 Japan Hawai‘i Institute of Geophysics and Planetology University of Hawai‘i at Mānoa HonoluluHI96822 United States Department of Earth and Planetary Systems Science Hiroshima University Higashi-Hiroshima Hiroshima739-8526 Japan Graduate School of Engineering Materials Science and Engineering Tokyo Denki University Tokyo120-8551 Japan Institut de Mineralogie Physique des Materiaux et de Cosmochimie Museum National d'Histoire Naturelle CNRS Sorbonne Université Paris75231 France McDonnell Center for the Space Sciences and Physics Department Washington University St. LouisMO63130 United States Geochemical Research Center The University of Tokyo Bunkyo-ku Tokyo113-0033 Japan Guangzhou Institute of Geochemistry Chinese Academy of Sciences GD Guangzhou510640 China Department of Natural History Sciences Hokkaido University Sapporo060-0810 Japan Centre for Star and Planet Formation Globe Institute University of Copenhagen Copenhagen1350 Denmark Institut de Planétologie et d'Astrophysique Université Grenoble Alpes Grenoble38000 France Bayerisches Geoinstitut Universität Bayreuth Bayreuth95447 Germany Institut de Physique du Globe de Paris Université de Paris CNRS Paris75005 France Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of UMR 8214 Université Paris-Saclay CNRS Orsay91405 France Department of the Geophysical Sciences Enrico Fermi Institute The University of Chicago ChicagoIL60637 United States UMR 8000 Université Paris-Saclay CNRS Orsay91405 France Faculty of Geosciences and Geography University of Göttingen Götti

We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA’s Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate, 1 oxide, 1 O-anomalous supernova grain of ambiguous phase, 38 SiC, and 16 carbonaceous grains. At least two of the carbonaceous grains are presolar graphites, whereas several grains with moderate C isotopic anomalies are probably organics. The presolar silicate was located in a clast with a less altered lithology than the typical extensively aqueously altered Ryugu matrix. The matrix-normalized presolar grain abundances in Ryugu are 4.8 !".$%&.' ppm for O-anomalous grains, 25 !(%$ ppm for SiC grains and 11 !)%(ppm for carbonaceous grains. Ryugu is isotopically and petrologically similar to carbonaceous Ivuna-type (CI) chondrites. To compare the in situ presolar grain abundances of Ryugu with CI chondrites, we also mapped Ivuna and Orgueil samples and found a total of 15 SiC grains and 6 carbonaceous grains. No O-anomalous grains were detected. The matrix-normalized presolar grain abundances in the CI chondrites are similar to those in Ryugu: 23 !$%' ppm SiC and 9.0 !).$%(.& ppm carbonaceous grains. Thus, our results provide further evidence in support of the Ryugu-CI connection. They also reveal intriguing hints of small-scale heterogeneities in the Ryugu samples, such as locally distinct degrees of alteration that allowed the preservation of delicate presolar material. Copyright © 2022, The Authors. All rights reserved.

关键词： Silicon carbide

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Low latency global carbon budget reveals a continuous decline of the land carbon sink during the 2023/24 El Niño event

arXiv

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arXiv 2025年

作者： Ke, Piyu Ciais, Philippe Yao, Yitong Sitch, Stephen Li, Wei Xu, Yidi Du, Xiaomeng Gui, Xiaofan Bastos, Ana Zaehle, Sönke Poulter, Ben Colligan, Thomas van der Woude, Auke M. Peters, Wouter Liu, Zhu Jin, Zhe Tian, Xiangjun Wang, Yilong Liu, Junjie Pandey, Sudhanshu O’Dell, Chris Bian, Jiang Zhou, Chuanlong Miller, John Lan, Xin O’Sullivan, Michael Friedlingstein, Pierre van der Werf, Guido R. Peters, Glen P. Piao, Shilong Chevallier, Frédéric Department of Earth System Science Tsinghua University Beijing100084 China Faculty of Environment Science and Economy University of Exeter ExeterEX4 4QF United Kingdom Laboratoire des Sciences du Climat et de l'Environnement University Paris Saclay CEA CNRS Gif sur Yvette91191 France Department of Earth and Environmental Engineering Columbia University New York10027 United States Machine learning group Microsoft research Beijing100080 China Institute for Earth System Science and Remote Sensing Leipzig University Leipzig04103 Germany Department of Biogeochemical Integration Max Planck Institute for Biogeochemistry Jena07745 Germany Earth Sciences Division NASA Goddard Space Flight Center GreenbeltMD20771 United States Earth System Science Interdisciplinary Center University of Maryland College ParkMD20740 United States Environmental Sciences Group Dept of Meteorology and Air Quality Wageningen University Wageningen6708 PB Netherlands Institute of Carbon Neutrality Sino-French Institute for Earth System Science College of Urban and Environmental Sciences Peking University Beijing100871 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing100101 China Jet Propulsion Laboratory California Institute of Technology PasadenaCA91011 United States Cooperative Institute for Research in the Atmosphere Colorado State University Fort CollinsCO80523 United States National Oceanic and Atmospheric Administration Global Monitoring Laboratory CO80303 United States Cooperative Institute for Research in Environmental Sciences University of Colorado BoulderCO80303 United States Laboratoire de Météorologie Dynamique IPSL CNRS ENS Université PSL Sorbonne Université École Polytechnique Paris75005 France CICERO Center for International Climate Research Oslo0349 Norway

The high growth rate of atmospheric CO2 in 2023 was found to be caused by a severe reduction of the global net land carbon sink. Here we update the global CO2 budget from January 1st to July 1st 2024, during which El Niño drought conditions continued to prevail in the Tropics but ceased by March 2024. We used three dynamic global vegetation models (DGVMs), machine learning emulators of ocean models, three atmospheric inversions driven by observations from the second Orbiting Carbon Observatory (OCO-2) satellite, and near-real-time fossil CO2 emissions estimates. In a one-year period from July 2023 to July 2024 covering the El Niño 2023/24 event, we found a record-high CO2 growth rate of 3.66 ± 0.09 ppm yr-1 (± 1 standard deviation) since 1979. Yet, the CO2 growth rate anomaly obtained after removing the long term trend is 1.1 ppm yr-1, which is marginally smaller than the July-July growth rate anomalies of the two major previous El Niño events in 1997/98 and 2015/16. The atmospheric CO2 growth rate anomaly was primarily driven by a 2.24 GtC yr-1 reduction in the net land sink including 0.3 GtC yr-1 of fire emissions, partly offset by a 0.38 GtC yr-1 increase in the ocean sink relative to the 2015–2022 July-July mean. The tropics accounted for 97.5% of the land CO2 flux anomaly, led by the Amazon (50.6%), central Africa (34%), and Southeast Asia (8.2%), with extra-tropical sources in South Africa and southern Brazil during April–July 2024. Our three DGVMs suggest greater tropical CO2 losses in 2023/2024 than during the two previous large El Niño in 1997/98 and 2015/16, whereas inversions indicate losses more comparable to 2015/16. Overall, this update of the low latency budget highlights the impact of recent El Niño droughts in explaining the high CO2 growth rate until July 2024. © 2025, CC BY.

关键词： Budget control

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Transient numerical simulation on the performance of a neon-charged cryogenic loop heat pipe for space applications 69

Transient numerical simulation on the performance of a neon-...

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69th International Astronautical Congress: #InvolvingEveryone, IAC 2018

作者： He, Fa-Long Du, Wang-Fang Zhao, Jian-Fu Chen, Yue-Yong He, Jiang Zhang, Hong-Xing Miao, Jian-Yin National Microgravity Laboratory Institute of Mechanics Chinese Academy of Sciences. Beijing100190 China School of Engineering Science University of the Chinese Academy of Sciences Beijing100049 China Beijing Key Laboratory of Space Thermal Control Technology Beijing100094 China Institute of Spacecraft System Engineering China Academy of Space Technology Beijing100094 China

A transient mathematical model for cryogenic loop heat pipe (CLHP), which possesses high pumping capability and good heat transfer performance that are important for effective and efficient cryogenic heat transport with considerable applications in space and terrestrial surroundings, is established and used to study the performance of a neon-charged CLHP (Ne-CLHP) in the present work. The numerical results are benchmarked with experimental data and a good agreement is achieved. The effects of parasitic heat loss, charged pressure of the working fluid, and heat sink temperature on the performance of the Ne-CLHP are conducted under a constant heat loads applied to the secondary evaporator (1.5 W), which is selected based on the previous experimental study. Based on the numerical results, it is found that the heat sink temperature affects slightly the resistance loss of the system, but markedly the wall temperature of primary evaporator and the maximum heat transport capability. There existed an optimum charged pressure of the working fluid to achieve the maximum heat transport capability. The detailed temperature and pressure characteristics of the Ne-CLHP are also captured which can provide a better understanding of the inherent mechanisms responsible for the phenomena and then provide guidance for the design and optimization of Ne-CLHPs, which can realize efficient cryogenic heat transport in the temperature range of 30-40 K, and promises great application potential in the thermal control of future space infrared exploration system. Copyright © 2018 by Fa-Long He and Jian-Fu Zhao. Published by the IAF, with permission and released to the IAF to publish in all forms. .

关键词： Neon

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A comparative review of the state and advancement of Site-Specific Crop Management in the UK and China

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Frontiers of Agricultural science and Engineering 2019年第2期6卷 116-136页

作者： Zhenhong LI James TAYLOR Lynn FREWER Chunjiang ZHAO Guijun YANG Zhenhai LI Zhigang LIU Rachel GAULTON Daniel WICKS Hugh MORTIMER Xiao CHENG Chaoqing YU Zhanyi SUN School of Engineering Newcastle University Newcastle upon Tyne NE1 7RU UK School of Natural and Environmental Sciences Newcastle University Newcastle upon l\ne NE1 7RU UK National Engineering Research Center for Information Technology in Agriculture Beijing Nongke Mansion Beijing 100097 China Courtyard Agriculture Ltd. Wiltshire SN3 5HY UK Satellite Applications Catapult Harwell OX11 0QR UK RAL Space Science and Technology Facilities Council Didcot 0X11 OQX UK State Key Laboratory of Remote Sensing Science College of Global Change and Earth System Science Beijing Normal University Beijing 100875 China Center for Earth System Science Tsinghua University Beijing 100084 China National Geomatics Center of China Beijing 100830 China

Precision agriculture, and more specifically Site-Specific Crop Management(SSCM), has been implemented in some form across nearly all agricultural production systems over the past 25 years. Adoption has been greatest in developed agricultural countries. In this review article, the current situation of SSCM adoption and application is investigated from the perspective of a developed(UK) and developing(China) agricultural economy. The current state-of-the art is reviewed with an emphasis on developments in position system technology and satellite-based remote sensing. This is augmented with observations on the differences between the use of SSCM technologies and methodologies in the UK and China and discussion of the opportunities for(and limitations to)increasing SSCM adoption in developing agricultural economies. A particular emphasis is given to the role of socio-demographic factors and the application of responsible research and innovation(RRI) in translating agritechnologies into China and other developing agricultural economies. Several key research and development areas are identified that need to be addressed to facilitate the delivery of SSCM as a holistic service into areas with low precision agriculture(PA) adoption. This has implications for developed as well as developing agricultural economies.

关键词： remote sensing decision support responsible research and innovation digital soil mapping

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GLOBAL CLIMATE

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Bulletin of the American Meteorological Society 2024年第8期105卷 S12-S155页

作者： Dunn, R.J.H. Blannin, J. Gobron, N. Miller, J.B. Willett, K.M. Met Office Hadley Centre Exeter United Kingdom European Commission Joint Research Centre Ispra Italy NOAA Global Monitoring Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland European Centre for Medium-Range Weather Forecasts Bonn Germany Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Hampton University Hampton Virginia National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Laboratoire des Sciences du Climat et de l’Environnement (LSCE) LSCE/IPSL CEA-CNRS-UVSQ Gif-sur-Yvette France Instituto de Geografía Pontificia Universidad Católica de Valparaíso Valparaíso Chile Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia University of Reading Reading United Kingdom Institute Pierre Simon Laplace (IPSL) Guyancourt France School of Engineering Newcastle University Newcastle-upon-Tyne United Kingdom Université Paris Cité Institut de physique du globe de Paris CNRS IGN F-75005 Paris France Univ Gustave Eiffel ENSG IGN F-77455 Marne-la-Vallée France Laboratoire EDYTEM CNRS/Université Savoie Mont-Blanc Le Bourget-du-Lac France Global Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt Maryland Universität Hamburg Hamburg Germany Climate Dynamics Lab University of St Andrews St Andrews United Kingdom Ea

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Corrigendum to “Mesozoic subduction-related accretion of micro-blocks in the East Asian Ocean-Continent Connection Zone” [Earth-science Reviews 216 (2021) 103575]

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Earth-science Reviews 2021年 218卷

作者： Gang Wang Suhua Jiang Pengcheng Wang Lingli Guo Yan Jiang Leilei Lu Ian Somerville Sanzhong Li School of Earth and Space Sciences University of Science and Technology of China Anhui Mengcheng National Geophysical Observatory Hefei 230026 China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting Techniques MOE and College of Marine Geosciences Ocean University of China Qingdao 266100 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China UCD School of Earth Sciences University College Dublin Belfeld Dublin 4 Ireland

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Sub-Rayleigh imaging via undersampling scanning based on sparsity constraints

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Chinese Physics B 2017年第2期26卷 218-222页

作者： Chang-Bin Xue Xu-Ri Yao Wen-Kai Yu Xiao-Yong Guo Long-Zhen Li Xue-Feng Liu Guang-Jie Zhai Qing Zhao School of Physics Beijing Institute of Technology Beijing 100081 China Key Laboratory of Electronics and Information Technology for Space System National Space Science Center Chinese Academy of Sciences Beijing 100190 China

We demonstrate that, by undersampling scanning object with a reconstruction algorithm related to compressed sensing, an image with the resolution exceeding the finest resolution defined by the numerical aperture of the system can be obtained. Experimental results show that the measurements needed to achieve sub-Rayleigh resolution enhancement can be less than 10% of the pixels of the object. This method offers a general approach applicable to point-by-point illumination super-resolution techniques.

关键词： super-resolution image reconstruction techniques

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Thaddäus derfflinger's sunspot observations during 1802-1824: A primary reference to understand the dalton minimum

arXiv

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arXiv 2020年

作者： Hayakawa, Hisashi Besser, Bruno P. Iju, Tomoya Arlt, Rainer Uneme, Shoma Imada, Shinsuke Bourdin, Philippe A. Kraml, Amand Graduate School of Letters Osaka University Toyonaka5600043 Japan UK Solar System Data Centre Space Physics and Operations Division RAL Space Science and Technology Facilities Council Rutherford Appleton Laboratory Harwell Oxford Didcot OxfordshireOX11 0QX United Kingdom Space Research Institute Austrian Academy of Sciences Graz8042 Austria Institute of Physics University of Graz Universitätsplatz 5/II Graz8010 Austria National Astronomical Observatory of Japan Mitaka1818588 Japan An der Sternwarte 16 PotsdamD-14482 Germany Institute for Space-Earth Environmental Research Nagoya University Nagoya4648601 Japan Sternwarte Stift Kremsmünster Kremsmünster4550 Austria

As we are heading towards the next solar cycle, presumably with a relatively small amplitude, it is of significant interest to reconstruct and describe the past grand minima on the basis of actual observations of the time. The Dalton Minimum is often considered one of the grand minima captured in the coverage of telescopic observations. Nevertheless, the reconstructions of the sunspot group number vary significantly, and the existing butterfly diagrams have a large data gap during the period. This is partially because most long-term observations have remained unexplored in historical archives. Therefore, to improve our understanding on the Dalton Minimum, we have located two series of Thaddäus Derfflinger's observational records (a summary manuscript and logbooks) as well as his Brander's 5.5-feet azimuthal-quadrant preserved in the Kremsmünster Observatory. We have revised the existing Derfflinger's sunspot group number with Waldmeier classification and eliminated all the existing 'spotless days' to remove contaminations from solar meridian observations. We have reconstructed the butterfly diagram on the basis of his observations and illustrated sunspot distributions in both solar hemispheres. Our article aims to revise the trend of Derfflinger's sunspot group number and to bridge a data gap of the existing butterfly diagrams around the Dalton Minimum. Our results confirm that the Dalton Minimum is significantly different from the Maunder Minimum, both in terms of cycle amplitudes and sunspot distributions. Therefore, the Dalton Minimum is more likely a secular minimum in the long-term solar activity, while further investigations for the observations at that time are required. Copyright © 2020, The Authors. All rights reserved.

关键词： Solar energy

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