Article
Geography, Physical
Fuxiao Jiang, Xianhong Xie, Yibing Wang, Arken Tursun, Yao Liu
Summary: This study used GLASS products to detect changes in shortwave radiation and albedo over China from 2003 to 2018, and quantified their contributions to potential evapotranspiration (PET). The results showed that decreased shortwave radiation led to a decrease in PET, particularly in the agricultural production region of the north China plain. This highlights the importance of considering shortwave radiation balance when evaluating the reliability of climate change impacts on the hydrological cycle and ecosystem response.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Environmental Sciences
Jie Deng, Brian J. Pickles, Li Shao
Summary: This study found that tree crown surface albedo changes over time, and that tree crown transflectance in the near infrared region is proportionally linked to tree crown surface albedo. Additionally, infrared radiation accounts for over 90% of the total shortwave radiation reflected from tree crowns.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Environmental Sciences
Peter Nojarov, Todor Arsov, Ivo Kalapov, Hristo Angelov
Summary: This study aims to reveal the direct radiative effect of aerosols on global solar shortwave radiation in a specific region. The results show that the underlying surface albedo plays a significant role in the radiative effect of aerosols, with relationships mostly being non-linear.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Gang Yang, Jiyan Wang, Junnan Xiong, Zhiwei Yong, Chongchong Ye, Huaizhang Sun, Jun Liu, Yu Duan, Yufeng He, Wen He
Summary: The study proposed an algorithm for simultaneous retrieval of 30-m Landsat albedo, which showed favorable usability and robustness through validation and comparison with another algorithm.
Article
Geosciences, Multidisciplinary
C. L. Jakobs, C. H. Reijmer, M. R. van den Broeke, W. J. van de Berg, J. M. van Wessem
Summary: Surface melt is a crucial process for ice shelves stability, significantly influenced by solar radiation absorption and the snowmelt-albedo feedback (SMAF) in Antarctica. The effectiveness of SMAF is found to be highest on ice shelves in East Antarctica, less significant on the Antarctic Peninsula and the Ross and Filchner-Ronne ice shelves. SMAF is most important at around 265 ± 2 K, with subseasonal parameters such as dry period length, time between snowfall and snowmelt events, and temperatures playing a role.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Meteorology & Atmospheric Sciences
Norman G. Loeb, Wenying Su, Nicolas Bellouin, Yi Ming
Summary: The study found that there is no significant trend in ADRE and AOD on a global scale, but ADRE is increasing in the Northern Hemisphere due to emission reductions in China, the United States, and Europe. The COVID-19 shutdown had no noticeable impact on global ADRE or AOD, but had a substantial influence on northeastern China.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geochemistry & Geophysics
Yinghui Ding, Ying Qu, Zeli Peng, Mengsi Wang, Xijia Li
Summary: This study developed a method using a neural network model to estimate the surface albedo of Arctic sea ice, taking into account the influences of reflectance anisotropy and melt ponds. The results showed improved estimation accuracy and calculation efficiency compared to previous studies. This provides new insights for estimating Arctic sea ice albedo from satellite observations.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Agronomy
Xinbo Xue, Shichao Jin, Feng An, Huaiqing Zhang, Jiangchuan Fan, Markus P. Eichhorn, Chengye Jin, Bangqian Chen, Ling Jiang, Ting Yun
Summary: This study developed a method using LiDAR data and computer graphics to model forest canopy radiation fluxes for conifer, broadleaf, and mixed forest plots. The results showed that conifer plots received the highest overall radiant flux due to their higher reflectance and absorption of reflected solar beams, while broadleaf plots received more transmitted radiant flux due to their larger transmittance in shaded areas. The method accurately simulated the detailed distribution of canopy radiation at plot-scale and is valuable for studying light-dependent biophysiological processes.
Article
Environmental Sciences
Shuchao Ye, Huihui Feng, Bin Zou, Ying Ding, Sijia Zhu, Feng Li, Guotao Dong
Summary: Utilizing observational data, this study detected the impacts of LUCC on Rsn, revealing a decreasing trend in Rsn in the study area due to the combined effects of LUCC and climate change. LUCC contributed 2.53% to 5.38% to the total Rsn change, showcasing the significant influence of LUCC on the surface radiation budget.
Article
Meteorology & Atmospheric Sciences
Lejiang Yu, Shiyuan Zhong, Timo Vihma, Bo Sun
Summary: The study found that the decline in Arctic sea ice is mainly driven by changes in thermodynamic processes unrelated to circulation, with circulation changes playing a smaller role. The combination of these two mechanisms has contributed to the decrease in sea ice.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Ruohan Li, Dongdong Wang, Weile Wang, Ramakrishna Nemani
Summary: Surface downward shortwave radiation (DSR) and photosynthetically active radiation (PAR) are crucial for Earth's surface processes. Existing products do not meet the increasing demand for high-spatiotemporal-resolution DSR and PAR estimation. This study developed a new GeoNEX data product using a physical-based lookup table approach, which showed higher accuracy compared to other existing products.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Geosciences, Multidisciplinary
Zoe Rehder, Anna Zaplavnova, Lars Kutzbach
Summary: The study shows that waterbody methane emissions are negatively correlated with the size of the emitting waterbody, with ponds contributing disproportionately to aquatic methane budgets. Methane concentrations and emissions from ponds exhibit more spatial variability compared to larger waterbodies, highlighting the need to better understand this variability for accurate upscaling estimates of freshwater methane emissions. Different geomorphological types of ponds in the Arctic permafrost landscape exhibit distinct drivers of methane concentrations, suggesting the complexity of factors influencing methane concentrations in ponds.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geography, Physical
Rachel Diamond, Louise C. Sime, David Schroeder, Maria-Vittoria Guarino
Summary: The Hadley Centre Global Environment Model version 3 successfully simulates an ice-free Arctic during the Last Interglacial, with the summer ice melt mainly driven by thermodynamic processes rather than atmospheric and ocean circulation changes. The formation of melt ponds plays a significant role in changing the energy balance and albedo feedback, impacting Arctic surface temperatures. Strong correlations between spring melt pond and summer ice area provide insights for predicting future sea-ice loss. Models with explicitly modelled melt ponds may have different sea-ice behavior under different forcings, raising concerns for future projections.
Article
Meteorology & Atmospheric Sciences
M. ichinari Amma, T. adahiro Hayasaka
Summary: We investigated the interannual variations in the annual mean and seasonal cycle of upward shortwave radiation at the top of the atmosphere (TOA SW1) over the Arctic using the Clouds and the Earth's Radiant Energy System (CERES) observation data during 2001-2020. We found that the annual mean TOA SW1 over the Arctic showed a decreasing trend from 2001 to 2012 and had a large interannual variability after 2012. The changes in TOA SW1 were related to land snow and sea ice melt timing in spring and summer, as well as cloud variability over land in summer.
JOURNAL OF CLIMATE
(2023)
Article
Engineering, Electrical & Electronic
Shimaa El-Shemy, Arafa H. Aly, Hassan Sayed, M. F. Eissa
Summary: In recent years, there has been a growing interest among researchers in the field of photonic crystals due to their unique and useful properties. In this study, a high reflectance photonic crystal structure was created using an aluminum oxide and titanium oxide composite material. This structure can efficiently reflect Cherenkov light generated by Cherenkov radiation, providing potential applications in micro/nano-power sources.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Oceanography
Yusuke Kawaguchi, Zoe Koenig, Daiki Nomura, Mario Hoppmann, Jun Inoue, Ying-Chih Fang, Kirstin Schulz, Michael Gallagher, Christian Katlein, Marcel Nicolaus, Benjamin Rabe
Summary: This study examines the mixing processes and sea ice drift in the ice-ocean boundary layer (IOBL) near the geographic North Pole. Measurements of ice motion, currents, hydrography, and turbulence were conducted to quantify the transport of momentum, heat, and salt in the IOBL. The study provides important insights into Arctic climate change.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Michael Angelopoulos, Ellen Damm, Patric Simoes Pereira, Katarina Abrahamsson, Dorothea Bauch, Jeff Bowman, Giulia Castellani, Jessie Creamean, Dmitry V. Divine, Adela Dumitrascu, Steven W. Fons, Mats A. Granskog, Nikolai Kolabutin, Thomas Krumpen, Chris Marsay, Marcel Nicolaus, Marc Oggier, Annette Rinke, Torsten Sachs, Egor Shimanchuk, Jacqueline Stefels, Mark Stephens, Adam Ulfsbo, Josefa Verdugo, Lei Wang, Liyang Zhan, Christian Haas
Summary: The increased fraction of first year ice (FYI) at the expense of old ice (SYI and MYI) affects the permeability of the Arctic ice cover and gas exchange at the interfaces with the atmosphere and ocean. Sea ice temperature and salinity time series were analyzed to assess the development of sea ice permeability and brine drainage efficiency. The study found that SYI and FYI have different responses to atmospheric warming events and that the projected increase in FYI may favor gas exchange at the atmosphere-ice interface.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
Kathrin Busch, Beate M. Slaby, Wolfgang Bach, Antje Boetius, Ina Clefsen, Ana Colaco, Marie Creemers, Javier Cristobo, Luisa Federwisch, Andre Franke, Asimenia Gavriilidou, Andrea Hethke, Ellen Kenchington, Furu Mienis, Sadie Mills, Ana Riesgo, Pilar Rios, Emyr Martyn Roberts, Detmer Sipkema, Lucia Pita, Peter J. Schupp, Joana Xavier, Hans Tore Rapp, Ute Hentschel
Summary: This study presents a large-scale analysis of microbial diversity in deep-sea sponges. They show that sponge microbial abundance status, geographic distance, sponge phylogeny and the physical-biogeochemical environment drive microbiome composition, in descending order of relevance. The uniqueness of each deep-sea sponge ground stresses the need for their strategic preservation.
NATURE COMMUNICATIONS
(2022)
Correction
Multidisciplinary Sciences
Kathrin Busch, Beate M. Slaby, Wolfgang Bach, Antje Boetius, Ina Clefsen, Ana Colaco, Marie Creemers, Javier Cristobo, Luisa Federwisch, Andre Franke, Asimenia Gavriilidou, Andrea Hethke, Ellen Kenchington, Furu Mienis, Sadie Mills, Ana Riesgo, Pilar Rios, Emyr Martyn Roberts, Detmer Sipkema, Lucia Pita, Peter J. Schupp, Joana Xavier, Hans Tore Rapp, Ute Hentschel
NATURE COMMUNICATIONS
(2022)
Editorial Material
Multidisciplinary Sciences
Stephan Frickenhaus, Daniela Ransby, Matthew Shupe, Ralf Jaiser, Marcel Nicolaus
Summary: MOSAiC is a multinational interdisciplinary project in the field of earth system sciences, aiming to study the Arctic climate.
Article
Geosciences, Multidisciplinary
David Clemens-Sewall, Chris Polashenski, Markus M. Frey, Christopher J. Cox, Mats A. Granskog, Amy R. Macfarlane, Steven W. Fons, Julia Schmale, Jennifer K. Hutchings, Luisa von Albedyll, Stefanie Arndt, Martin Schneebeli, Don Perovich
Summary: The amount of snow lost into Arctic leads was measured in winter 2020, revealing minimal snow loss under typical winter conditions. However, during a cyclone with warm air temperatures, high winds, and snowfall, a significant amount of snow was lost. This suggests that warm air temperatures may be an important factor in snow loss into leads.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Hannah Niehaus, Gunnar Spreen, Gerit Birnbaum, Larysa Istomina, Evelyn Jaekel, Felix Linhardt, Niklas Neckel, Niels Fuchs, Marcel Nicolaus, Tim Sperzel, Ran Tao, Melinda Webster, Nicholas Wright
Summary: Melt ponds formed on Arctic sea ice in summer have a significant impact on the surface albedo and heat balance of the sea ice. Monitoring their areal coverage is crucial as it can change rapidly. In this study, a revised method using Sentinel-2 satellite imagery is presented to extract melt pond fraction (MPF), which is evaluated using higher-resolution satellite and helicopter-borne imagery. The analysis of melt pond evolution during the MOSAiC campaign in 2020 reveals early and exceptional formation of melt ponds in a highly deformed ice area compared to its vicinity. Arctic-wide analysis of MPF from 2017 to 2021 shows a consistent seasonal cycle in all regions and years.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Computer Science, Hardware & Architecture
Lanier Watkins, Denzel Hamilton, Tyler A. Young, Sebastian Zanlongo, Louis L. Whitcomb, Andrew R. Spielvogel, Barbara Kobzik-Juul
Summary: We are expanding research in the field of uncrewed aircraft systems by investigating safety in more realistic and congested airspace operations. These investigations allow us to realistically examine the roles that autonomy and assurance should play in future airspace operations.
Article
Environmental Sciences
Polona Itkin, Stefan Hendricks, Melinda Webster, Luisa von Albedyll, Stefanie Arndt, Dmitry Divine, Matthias Jaggi, Marc Oggier, Ian Raphael, Robert Ricker, Jan Rohde, Martin Schneebeli, Glen E. Liston
Summary: Repeated transects are crucial for understanding ice mass balance, and the study details transects at the MOSAiC 2019-2020, which collected measurements across an entire season. The snow at MOSAiC was thin, while the sea ice was thick. Different types of sea ice were observed, including thin level ice and thick deformed ice. The thickness of ice and snow varied throughout the season, with the thinnest ice having the thinnest snow and the growth rates of thin ice exceeding that of thick ice. The diverse data obtained from the transects will be valuable for model and remote sensing product development.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2023)
Article
Environmental Sciences
Evgenii Salganik, Benjamin A. Lange, Polona Itkin, Dmitry Divine, Christian Katlein, Marcel Nicolaus, Mario Hoppmann, Niklas Neckel, Robert Ricker, Knut Hoyland, Mats A. Granskog
Summary: This study examines the thermal and morphological evolution of an Arctic first-year sea-ice ridge, revealing its formation and melt processes. The research found that the ridge consolidated slowly through heat loss to the atmosphere and rapidly from April to June. The study also discovered that ridge keels act as meltwater sources in Arctic pack ice. These findings are important for understanding the role of ridge keels and ice-associated organisms in Arctic sea ice.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2023)
Article
Geosciences, Multidisciplinary
Marc de Vos, Panagiotis Kountouris, Lasse Rabenstein, John Shears, Mira Suhrhoff, Christian Katlein
Summary: On 5 December 1914, Sir Ernest Shackleton and his crew embarked on the Imperial Trans-Antarctic Expedition with the Endurance ship. However, the ship got stuck in ice and sank in November 1915. After years of speculation, the wreckage was located in March 2022, about 9.4 km away from the estimated sinking position. This paper describes the use of meteorological data to reconstruct the ship's drift trajectory and highlights the potential of such methods in marine archaeology.
HISTORY OF GEO- AND SPACE SCIENCES
(2023)
Review
Ecology
Julian Gutt, Stefanie Arndt, David Keith Alan Barnes, Horst Bornemann, Thomas Brey, Olaf Eisen, Hauke Flores, Huw Griffiths, Christian Haas, Stefan Hain, Tore Hattermann, Christoph Held, Mario Hoppema, Enrique Isla, Markus Janout, Celine Le Bohec, Heike Link, Felix Christopher Mark, Sebastien Moreau, Scarlett Trimborn, Ilse van Opzeeland, Hans-Otto Poertner, Fokje Schaafsma, Katharina Teschke, Sandra Tippenhauer, Anton Van de Putte, Mia Wege, Daniel Zitterbart, Dieter Piepenburg
Summary: Systematic long-term studies on ecosystem dynamics are lacking in the East Antarctic Southern Ocean. This study proposes a framework for a cross-disciplinary long-term study in the eastern Weddell Sea and adjacent areas, which have so far experienced comparatively muted climate and environmental change. By establishing an observatory and conducting regular surveys, researchers aim to explore and map long-term changes in ocean dynamics, geochemistry, biodiversity, and ecosystem functions and services. The integrated approach will provide crucial data for understanding and projecting the consequences of climate change and supporting conservation efforts in the Southern Ocean.
Article
Environmental Sciences
Ruibo Lei, Bin Cheng, Mario Hoppmann, Fanyi Zhang, Guangyu Zuo, Jennifer K. Hutchings, Long Lin, Musheng Lan, Hangzhou Wang, Julia Regnery, Thomas Krumpen, Jari Haapala, Benjamin Rabe, Donald K. Perovich, Marcel Nicolaus
Summary: By analyzing buoy data, we revealed four stages of sea ice seasonality and timing in the Arctic, as well as the processes of ice growth and melting. The findings are crucial for future studies on Arctic sea ice.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Geography, Physical
David N. Wagner, Matthew D. Shupe, Christopher Cox, Ola G. Persson, Taneil Uttal, Markus M. Frey, Amelie Kirchgaessner, Martin Schneebeli, Matthias Jaggi, Amy R. Macfarlane, Polona Itkin, Stefanie Arndt, Stefan Hendricks, Daniela Krampe, Marcel Nicolaus, Robert Ricker, Julia Regnery, Nikolai Kolabutin, Egor Shimanshuck, Marc Oggier, Ian Raphael, Julienne Stroeve, Michael Lehning
Summary: Data from the MOSAiC expedition provided detailed information on the temporal dynamics of snowfall, snow accumulation, and erosion in the Arctic. Comparison of different measurement instruments revealed their strengths and weaknesses in measuring precipitation.
Article
Environmental Sciences
Luisa von Albedyll, Stefan Hendricks, Raphael Grodofzig, Thomas Krumpen, Stefanie Arndt, H. Jakob Belter, Gerit Birnbaum, Bin Cheng, Mario Hoppmann, Jennifer Hutchings, Polona Itkin, Ruibo Lei, Marcel Nicolaus, Robert Ricker, Jan Rohde, Mira Suhrhoff, Anna Timofeeva, Daniel Watkins, Melinda Webster, Christian Haas
Summary: Sea ice thickness undergoes seasonal changes influenced by thermodynamic and dynamic processes. This study utilizes data from the MOSAiC expedition to analyze large-scale surveys and demonstrates the dominant role of thermodynamic growth and decay in the seasonal cycle. The study also highlights the contribution of ice dynamics and deformation processes to the increase in mean thickness.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)