Article
Geosciences, Multidisciplinary
Emilio I. Mateo, Bryan G. Mark, Robert A. Hellstrom, Michel Baraer, Jeffrey M. McKenzie, Thomas Condom, Alejo Cochachin Rapre, Gilber Gonzales, Joe Quijano Gomez, Rolando Cesai Cruz Encarnacion
Summary: This article presents a comprehensive hydrometeorological dataset collected over the past two decades in the Cordillera Blanca region of Peru. The dataset enables detailed research of atmospheric and hydrological processes in tropical high-mountain terrain.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geosciences, Multidisciplinary
Jan Klimes, Jan Novotny, Alejo Cochacin Rapre, Jan Balek, Pavel Zahradnicek, Tazio Strozzi, Hamid Sana, Holger Frey, Milos Rene, Petr Stepanek, Jan Meitner, Johan Junghardt
Summary: This study analyzes the impact of a 2002 rock avalanche in the Cordillera Blanca region of Peru based on detailed historical data and engineering geological slope models, emphasizing the long-term effects on slope stability. The results show that rock slope stability is influenced by discontinuous slip planes and rock bridges.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Ben M. Roberts-Pierel, Peter B. Kirchner, John B. Kilbride, Robert E. Kennedy
Summary: This study addresses the limitations of traditional methods for mapping glacier change by developing a novel deep-learning-based approach. The researchers successfully created a record of glacier change in Alaska for over three decades using this method. The results show that the deep learning model can accurately capture the changes in glacier coverage.
Article
Environmental Sciences
Sajid Ali, Garee Khan, Wajid Hassan, Javed Akhter Qureshi, Iram Bano
Summary: Ice masses and snow of Hunza River Basin are crucial sources of fresh water for downstream inhabitants, but are significantly affected by changing climatic conditions. While the overall glacier area in HRB decreased from 1990 to 2018, there was a period of growth observed from 2009 to 2015. The glaciers in HRB are relatively stable compared to other regions, but are still vulnerable to climate change impacts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geography, Physical
Fabian Fleischer, Jan-Christoph Otto, Robert R. Junker, Daniel Hoelbling
Summary: Debris cover on glaciers is a key component influencing climate-glacier dynamics and glacier lifespan. The study in the Eastern Alps of Austria shows an increase of over 10% in debris cover on glaciers from 1996 to 2015, while glaciers retreated in response to climate warming. Different mountain ranges exhibit significant regional variability in debris cover on glaciers.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Environmental Sciences
Andrew Kos, Florian Amann, Tazio Strozzi, Julian Osten, Florian Wellmann, Mohammadreza Jalali, Anja Dufresne
Summary: The study reconstructed a unique record of ice surface velocities using synthetic aperture radar offset tracking over a 3.2 year period for the Palcaraju glacier in Peru. Velocity variations were found to be influenced by seasonal and inter-annual changes in Sea Surface Temperature Anomalies (SSTA) related to the El Nino Southern Oscillation (ENSO). The dominant seasonal signal was sensitive to altitude, aspect, and slope, with measured velocity variations related to glacier surface energy balance, meltwater production, and subglacial water pressures. Areas with potential ice avalanche initiation were evaluated, showing no imminent evidence of instabilities during the observation period.
Article
Multidisciplinary Sciences
Anais Zimmer, Timothy Beach, Sebastian Riva Regalado, Jean Salcedo Aliaga, Rolando Cruz Encarnacion, Fabien Anthelme
Summary: Mountain glaciers worldwide are shrinking, creating space for the development of new alpine ecosystems. However, the harsh environments in these areas delay primary succession. A study suggests that Llama glama contributes to soil and vegetation primary succession after glacial retreat through their latrine behavior and role as a seed disperser.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Lei Huang, Zhen Li, Jian Min Zhou, Ping Zhang
Summary: By employing the innovative multi-temporal minimum NDSI composite method, this study successfully extracted images of glaciers and nonseasonal snow, estimated the changes in glacier area in High Mountain Asia over the past 29 years, and identified a high temporal and spatial heterogeneity in the changing trends.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Environmental Sciences
Nima Pahlevan, Antoine Mangin, Sundarabalan V. Balasubramanian, Brandon Smith, Krista Alikas, Kohei Arai, Claudio Barbosa, Simon Belanger, Caren Binding, Mariano Bresciani, Claudia Giardino, Daniela Gurlin, Yongzhen Fan, Tristan Harmel, Peter Hunter, Joji Ishikaza, Susanne Kratzer, Moritz K. Lehmann, Martin Ligi, Ronghua Ma, Francois-Regis Martin-Lauzer, Leif Olmanson, Natascha Oppelt, Yanqun Pan, Steef Peters, Nathalie Reynaud, Lino A. Sander de Carvalho, Stefan Simis, Evangelos Spyrakos, Francois Steinmetz, Kerstin Stelzer, Sindy Sterckx, Thierry Tormos, Andrew Tyler, Quinten Vanhellemont, Mark Warren
Summary: Atmospheric correction over inland and coastal waters remains a challenge in aquatic remote sensing, and the ACIX-Aqua project evaluated 8 AC processors. Data from the Community Validation Database and AERONET-OC showed differing performance of AC processors in different aquatic environments, highlighting the need for improving atmospheric correction for better quality downstream products in freshwater and coastal ecosystems.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Liam S. Taylor, Duncan J. Quincey, Mark W. Smith, Emily R. Potter, Joshua Castro, Catriona L. Fyffe
Summary: Around 70% of tropical glaciers in Peru are melting rapidly, causing significant impact on water sources and agricultural irrigation in the region. Data shows that glacierized areas have shrunk since the 1970s, leading to increased instability in mountain regions and reduced meltwater streamflow, resulting in higher pressure on freshwater supply.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Jingsong Ma, Chunqiao Song, Yanjun Wang
Summary: Climate warming is accelerating the melting of glaciers and the growth of glacial lakes in the Alps, mainly concentrated in the western and central regions. The number, area, and water volume of glacial lakes are increasing, with different types of lakes showing varied distribution and characteristics.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geography, Physical
Nanyang Yan, Zhen Sun, Wei Huang, Zhao Jun, Shaojie Sun
Summary: Atmospheric correction is a major challenge in ocean color remote sensing, and it threatens the comprehensive evaluation of water quality in aquatic environments. This study evaluated and compared five state-of-the-art atmospheric correction processors applied to Landsat-8 satellite data. The results showed that L2gen produced the most accurate remote sensing reflectance (Rs) in the visible bands, followed by Polymer, C2RCC, iCOR, and Acolite. Recommendations for improving the accuracy of atmospheric correction were also provided, such as using polarization observations and concurrent aerosol and ocean color measurements.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Geography, Physical
Yuang Xue, Zhefan Jing, Shichang Kang, Xiaobo He, Chenyu Li
Summary: This study aims to explore the feasibility of using UAV technology for high mountain glacier monitoring. By conducting four UAV surveys on two glaciers in the central Tibetan Plateau and combining Landsat data, the length, area, and elevation changes of these glaciers' ablation zones at different times were quantified.
JOURNAL OF GLACIOLOGY
(2021)
Article
Environmental Sciences
Junwei Wang, Zhongping Lee, Daosheng Wang, Shaoling Shang, Jianwei Wei, Alex Gilerson
Summary: The innovative MPACA approach for atmospheric correction in coastal waters, based on a revised POLYMER model, showed promising results in accurately retrieving remote sensing reflectance (R-rs(lambda)) from high-spatial-resolution satellite measurements. The performance of MPACA, which assumed uniform aerosol types and varying aerosol loads and water properties, was validated using Landsat-8 OLI images and in-situ matchups, outperforming other methods like SeaDAS and Acolite.
REMOTE SENSING OF ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Majid Nazeer, Christopher Olayinka Ilori, Muhammad Bilal, Janet Elizabeth Nichol, Weicheng Wu, Zhongfeng Qiu, Bijoy Krishna Gayene
Summary: The objective of atmospheric correction is to retrieve surface reflectance from TOA reflectance. The SREM method, which does not require AOD, water vapor, and ozone data, shows comparable accuracy and robustness in estimating surface reflectance.
ATMOSPHERIC RESEARCH
(2021)
Article
Environmental Sciences
Ruonan Chen, Liangyun Liu, Xinjie Liu, Zhunqiao Liu, Lianhong Gu, Uwe Rascher
Summary: This study presents methods to accurately estimate sub-daily GPP from SIF in evergreen needleleaf forests and demonstrates that the interactions among light, canopy structure, and leaf physiology regulate the SIF-GPP relationship at the canopy scale.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Daniel L. Goldberg, Madankui Tao, Gaige Hunter Kerr, Siqi Ma, Daniel Q. Tong, Arlene M. Fiore, Angela F. Dickens, Zachariah E. Adelman, Susan C. Anenberg
Summary: A novel method is applied in this study to directly use satellite data to evaluate the spatial patterns of urban NOx emissions inventories. The results show that the 108 spatial surrogates used by NEMO are generally appropriate, but there may be underestimation in areas with dense intermodal facilities and overestimation in wealthy communities.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Zhuoyue Hu, Xiaoyan Li, Liyuan Li, Xiaofeng Su, Lin Yang, Yong Zhang, Xingjian Hu, Chun Lin, Yujun Tang, Jian Hao, Xiaojin Sun, Fansheng Chen
Summary: This paper proposes a whisk-broom imaging method using a long-linear-array detector and high-precision scanning mirror to achieve high-resolution and wide-swath thermal infrared data. The method has been implemented in the SDGs satellite and has shown promising test results.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Dandan Wang, Leiqiu Hu, James A. Voogt, Yunhao Chen, Ji Zhou, Gaijing Chang, Jinling Quan, Wenfeng Zhan, Zhizhong Kang
Summary: This study evaluates different schemes for determining model coefficients to quantify and correct the anisotropic impact from remote sensing LST for urban applications. The schemes have consistent results and accurately estimate parameter values, facilitating the broadening of parametric models.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Jamie Tolan, Hung - Yang, Benjamin Nosarzewski, Guillaume Couairon, Huy V. Vo, John Brandt, Justine Spore, Sayantan Majumdar, Daniel Haziza, Janaki Vamaraju, Theo Moutakanni, Piotr Bojanowski, Tracy Johns, Brian White, Tobias Tiecke, Camille Couprie
Summary: Vegetation structure mapping is crucial for understanding the global carbon cycle and monitoring nature-based approaches to climate adaptation and mitigation. This study presents the first high-resolution canopy height maps for California and Sao Paulo, achieved through the use of very high resolution satellite imagery and aerial lidar data. The maps provide valuable tools for forest structure assessment and land use monitoring.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Regina Eckert, Steffen Mauceri, David R. Thompson, Jay E. Fahlen, Philip G. Brodrick
Summary: In this paper, a mathematical framework is proposed to improve the retrieval of surface reflectance and atmospheric parameters by leveraging the expected spatial smoothness of the atmosphere. Experimental results show that this framework can reduce the surface reflectance retrieval error and surface-related biases.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Chongya Jiang, Kaiyu Guan, Yizhi Huang, Maxwell Jong
Summary: This study presents the Field Rover method, which uses vehicle-mounted cameras to collect ground truth data on crop harvesting status. The machine learning approach and remote sensing technology are employed to upscale the results to a regional scale. The accuracy of the remote sensing method in predicting crop harvesting dates is validated through comparison with satellite data.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Oksana V. Lunina, Anton A. Gladkov, Alexey V. Bochalgin
Summary: In this study, an unmanned aerial vehicle (UAV) was used to detect and map surface discontinuities with displacements of a few centimeters, indicating the presence of initial geological deformations. The study found that sediments of alluvial fans are susceptible to various tectonic and exogenous deformational processes, and the interpretation of ultra-high resolution UAV images can help recognize low-amplitude brittle deformations at an early stage. UAV surveys are critical for discerning neotectonic activity and its related hazards over short observation periods.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Feng Zhao, Weiwei Ma, Jun Zhao, Yiqing Guo, Mateen Tariq, Juan Li
Summary: This study presents a data-driven approach to reconstruct the terrestrial SIF spectrum using measurements from the TROPOMI instrument on Sentinel-5 precursor mission. The reconstructed SIF spectrum shows improved spatiotemporal distributions and demonstrates consistency with other datasets, indicating its potential for better understanding of the ecosystem function.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Stephen Stehman, John E. Wagner
Summary: This article investigates optimal sample allocation in stratified random sampling for estimation of accuracy and proportion of area in applications where the target class is rare. The study finds that precision of estimated accuracy has a stronger impact on sample allocation than estimation of proportion of area, and the trade-offs among these estimates become more pronounced as the target class becomes rarer. The results provide quantitative evidence to guide sample allocation decisions in specific applications.
REMOTE SENSING OF ENVIRONMENT
(2024)
Article
Environmental Sciences
Jingyao Zheng, Tianjie Zhao, Haishen Lu, Defu Zou, Nemesio Rodriguez-Fernandez, Arnaud Mialon, Philippe Richaume, Jianshe Xiao, Jun Ma, Lei Fan, Peilin Song, Yonghua Zhu, Rui Li, Panpan Yao, Qingqing Yang, Shaojie Du, Zhen Wang, Zhiqing Peng, Yuyang Xiong, Zanpin Xing, Lin Zhao, Yann Kerr, Jiancheng Shi
Summary: Soil moisture and freeze/thaw (F/T) play a crucial role in water and heat exchanges at the land-atmosphere interface. This study reports the establishment of a wireless sensor network for soil moisture and temperature over the permafrost region of Tibetan Plateau. Satellite-based surface soil moisture (SSM) and F/T products were evaluated using ground-based measurements. The results show the reliability of L-band passive microwave SSM and F/T products, while existing F/T products display earlier freezing and later thawing, leading to unsatisfactory accuracy.
REMOTE SENSING OF ENVIRONMENT
(2024)