Article
Geography, Physical
Zifu Wang, Yun Li, Kevin Wang, Jacob Cain, Mary Salami, Daniel Q. Q. Duffy, Michael M. M. Little, Chaowei Yang
Summary: With the advancement of AI technologies and big Earth data, DL has become an important method in Earth science. However, computational challenges still exist for DL-based applications. This study aims to address these challenges by revising DL models/algorithms and testing their performance on multiple GPU computing platforms.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Ao Pang, Qi Liang, Weijia Li, Lei Zheng, Teng Li, Xiao Cheng
Summary: In this study, a ResUNet model was used to identify the spatial distribution of surface fractures on Antarctic ice shelves using MODIS data. It was found that the total area of surface fractures decreased from 2004 to 2014, primarily due to changes in fractures within 20 km of the ice front in the Amundsen and Wilkes sectors. High concentrations of fractures were particularly observed in the Thwaites Ice Shelf, Crosson Ice Shelf, and Getz Ice Shelf in the Amundsen sector. This study provides comprehensive and detailed information about surface fractures on Antarctic ice shelves and has implications for evaluating their vulnerability.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Xiuwan Yin, Bo Jiang, Shunlin Liang, Shaopeng Li, Xiang Zhao, Qian Wang, Jianglei Xu, Jiakun Han, Hui Liang, Xiaotong Zhang, Qiang Liu, Yunjun Yao, Kun Jia, Xianhong Xie
Summary: This study evaluated ten long-term land surface net radiation products under different spatial scales, spatial and temporal variations, and different conditions. The results showed that GLASS-MODIS performed the best during 2000-2018, followed by ERA5 and GLASS-AVHRR. During 1983-2018, GLASS-AVHRR and ERA5 ranked top and performed similarly. The differences in net radiation between satellite and reanalysis products may be attributed to radiative components, meteorological variables, and algorithm applicability.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Maximilian C. Hartmann, Ross S. Purves
Summary: City Walking Tour Videos (CWTVs) are a unique source of Volunteered Geographic Information that offer detailed street-level imagery. Through a mobility study focused on the City of Paris, we found that these videos contain rich information for analyzing urban transportation. By detecting transport modes and examining changes in mobility mix, we demonstrated the potential of CWTVs for urban analytics and identified shifts in transportation patterns during the Covid-19 pandemic.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Jinlian Liu, Xinyao Zhou, Hanya Tang, Fengqin Yan, Shiwei Liu, Xuguang Tang, Zhi Ding, Ke Jiang, Pujia Yu
Summary: Land surface temperature (LST) and its day-night difference (LSTd - LSTn) are influenced by vegetation and climate change. Quantifying their contribution and feedback is crucial for mitigation strategies. This study used partial correlation and spatial analysis to investigate the response of LST to vegetation and climate variables. Results showed negative responses and feedback from vegetation on LST, with vegetation being a major contributor to LSTd - LSTn decline. Air temperature (AT) played a decisive role in LST warming trend, partially mitigated by vegetation and precipitation (Pre).
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Yi Han, Guangyun Zhang, Rongting Zhang
Summary: This paper proposes a grid graph-based point cloud registration algorithm to align unordered point clouds. The algorithm divides the point cloud into a set of 3D grids and uses a voting strategy based on feature descriptors to measure the similarity between two grids. A graph matching method is then proposed to capture spatial consistency and refine the corresponding grids hierarchically to obtain point-to-point correspondences.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography
Marco Cardinale, David A. A. Vaz, Piero D'Incecco, Nicola Mari, Justin Filiberto, Gabriel L. L. Eggers, Gaetano Di Achille
Summary: Orbital data from the MESSENGER spacecraft reveals that a considerable portion of Mercury's northern hemisphere is covered by smooth plains, which are believed to be volcanic or impact melt material. Through a twofold process involving automatic mapping and visual inspection, a structural map of the northern smooth plains was created, detailing the various morphostructures including wrinkle ridges, ghost crater assemblages, and scarps related to impact crater processes. The mapping effort resulted in the identification and characterization of over fifty thousand scarps, each with their own morphometric attributes, providing valuable data for further geostatistical studies of smooth plains tectonics.
Article
Geography
Levan G. Tielidze, Joanna Charton, Vincent Jomelli, Olga N. Solomina
Summary: This study presents the first detailed glacial geomorphological mapping of the Notsarula and Chanchakhi river valleys in the Georgian Caucasus, providing valuable information for paleoglaciological reconstructions. The mapped landforms indicate multiple readvance or stillstands of valley glaciers, particularly in the Bubistskali River gorge.
Article
Geography
Jan Nyssen, Biadgilgn Demissie
Summary: According to a meta-analysis of historical maps, the geographical configuration of northwest Ethiopia has undergone significant changes over the past four centuries. The control of territory and language boundaries are depicted on the historical maps. The research reveals the historical control of Western Tigray and its surrounding districts, as well as the variation in territorial organization. The current regional organization in Ethiopia is based on ethnolinguistic demographics rather than historical dominance.
Article
Geography
E. Zelenin, A. Gurinov, S. Garipova, A. Zakharov
Summary: In this study, a geomorphological map of the Central Kamchatka Depression is provided, which is the largest sedimentary basin in Kamchatka and the North Pacific island arcs. This map serves as a guide for further geomorphological and paleogeographical investigations.
Article
Geography
Benjamin M. Boyes, Danni M. Pearce
Summary: This paper presents a new large-scale glacial geomorphological map of the Younger Dryas-early Holocene ice marginal zone in northwest Arctic Russia. The map, created using high-resolution ice sheet-scale geomorphological data in a GIS, will contribute to the understanding of ice sheet dynamics in the region and provide valuable constraints for numerical ice sheet models.
Article
Geography
Laura Alfonsi, Carlo Alberto Brunori, Luigi Cucci
Summary: This study examines the marine terraces of the southern side of the Sibari Plain in Northern Calabria, Italy using traditional and quantitative analyses of the Digital Terrain Model (DTM). The main objective is to utilize GIS tools that have not been previously used in the area and evaluate their applicability. By comparing manually identified terraced surfaces with those identified using GIS tools, a consensus map was created that includes 272 terraced surfaces and 62 morphological features associated with paleoshorelines. The final map depicts a well-developed flight of seven orders of marine terraces with elevations ranging from 45 to 360 meters above sea level and ages ranging from Marine Isotope Stage (MIS) 5a to 11.
Article
Geography
Lorenzo Dulcetta, Michel Faure, Philippe Rossi, Gabriele Cruciani, Marcello Franceschelli
Summary: This study investigates the Zicavo Metamorphic Complex in southern Corsica, which is part of the innermost Axial Zone of the Corsica-Sardinia Variscan belt. A 1:5000 geological map, along with new structural/microstructural and petrographic data, is used to analyze its geological and structural outline. The complex consists of three tectonic units separated by ductile shear zones. It has undergone multiple phases of deformation and metamorphism.
Article
Geography
Raffaele Gazzola, Costantino Zuccari, Chiara Frassi, Paraskevas Xypolias, Giovanni Musumeci
Summary: This study presents the geological conditions in the northeastern sector of Mykonos Island, including igneous, metamorphic and siliciclastic sequences, and discusses the structural characteristics and deformation patterns of the detachment systems in the region.
Article
Geography
Asim Ali, Paul Dunlop, Sonya Coleman, Dermot Kerr, Robert W. McNabb, Riko Noormets
Summary: Glaciers have been retreating due to climate change, particularly in the Arctic, causing sea levels to rise and potentially altering global weather and climate patterns. In this study, 2203 glaciers in different Arctic regions were mapped using Object-Based Image Analysis (OBIA) on Landsat satellite imagery in Google Earth Engine (GEE) to assess changes in glacier area over three decades. The results showed significant glacier area losses in Novaya Zemlya, Penny Ice Cap, Disko Island, and Kenai, with a total of seventy-three glaciers disappearing entirely.
Article
Geography
Giuseppe Palladino, Giacomo Prosser, Fabio Olita, Dario Avagliano, Beniamino Dello Iacovo, Salvatore Ivo Giano, Mario Bentivenga, Fabrizio Agosta, Salvatore Grimaldi
Summary: The Southern Apennines is a complex structural system formed by the progressive emplacement of various tectonic units. In order to better define the structures and update the stratigraphic units, a detailed geological map was created, considering not only basic stratigraphic units but also finer subdivisions. This approach improved the stratigraphy of the area, identified new geological units, and reconstructed the structural setting and tectonic evolution of the Agri Valley in detail.
Article
Geography, Physical
Hao Sun, Qian Xu, Yunjia Wang, Zhiyu Zhao, Xiaohan Zhang, Hao Liu, Jinhua Gao
Summary: Agricultural drought is a serious threat to global food security. A new soil moisture dataset was created in this study by enhancing satellite remote sensing data with machine learning. The study revealed the spatial and temporal dynamics of agricultural drought in China and showed a decreasing trend in drought severity from 1982 to 2020. The findings contribute to a better understanding of agricultural drought and highlight the need for improved satellite soil moisture datasets with faster updates and higher resolution.
GISCIENCE & REMOTE SENSING
(2023)
Article
Geography, Physical
Di Wu, Ruopu Li, Banafsheh Rekabdar, Claire Talbert, Michael Edidem, Guangxing Wang
Summary: The study aims to develop deep learning models for classifying images with flow barrier locations. Different Convolutional Neural Network (CNN) models were trained and compared using High-Resolution Digital Elevation Models (HRDEMs) and aerial orthophotos in four different watersheds in the U.S. Midwest. Results show that most deep learning models achieved over 90% accuracies consistently. The CNN model with HRDEMs as the sole input feature was found to be the best-fit model, while the addition of aerial orthophotos did not significantly improve the model's accuracy.
GISCIENCE & REMOTE SENSING
(2023)
Article
Geography, Physical
Marco Assiri, Anna Sartori, Antonio Persichetti, Cristiano Miele, Regine Anne Faelga, Tegan Blount, Sonia Silvestri
Summary: This study estimates aboveground biomass (AGB) in alpine peatlands in the Veneto Region, Italy, using a combination of in situ vegetation samples and datasets from UAV-based LiDAR, hyperspectral, and RGB sensors. The results indicate that UAV LiDAR data provides the most reliable solution for estimating AGB in alpine peatlands, while the inclusion of hyperspectral data provides only a minor improvement in accuracy.
GISCIENCE & REMOTE SENSING
(2023)
Article
Geography, Physical
Shili Meng, Yong Pang, Kebiao Huang, Zengyuan Li
Summary: Accurate forest cover mapping is crucial for monitoring forest extent in Southeast Asia. A novel method for mapping forest cover in the presence of cloud cover was presented, resulting in more accurate and reliable information than the initial maps. This approach provides a framework for improving the spatial continuity of existing thematic maps.
GISCIENCE & REMOTE SENSING
(2023)
