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Extreme precipitation trends in Northeast China based on a non-stationary generalized extreme value model Geosci. Lett. (IF 4.0) Pub Date : 2024-03-15 Fangxiu Meng, Kang Xie, Peng Liu, Huazhou Chen, Yao Wang, Haiyun Shi
Northeast China is the main food production base of China. Extreme precipitation (EP) events can seriously impact agricultural production and socioeconomics, but the understanding of EP in Northeast China is still limited. In this study, using the non-stationary generalized extreme value (GEV) model, we investigate the trend and potential risk of EP in Northeast China during 1959–2017, especially in
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Spatial comparison of inland water observations from CYGNSS, MODIS, Landsat, and commercial satellite imagery Geosci. Lett. (IF 4.0) Pub Date : 2024-03-07 G. K. Pavur, H. Kim, B. Fang, V. Lakshmi
Accurate and timely inland waterbody extent and location data are foundational information to support a variety of hydrological applications and water resources management. Recently, the Cyclone Global Navigation Satellite System (CYGNSS) has emerged as a promising tool for delineating inland water due to distinct surface reflectivity characteristics over dry versus wet land which are observable by
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Evaluating precipitation prediction skill for the pre- and postrainy seasons in South China in ECMWF subseasonal forecasts Geosci. Lett. (IF 4.0) Pub Date : 2024-03-05 Yanan Liu, Qiong Wu, Yizhi Zhang, Lujun Jiang
The rainy season in South China is divided into two phases, the pre- and postrainy seasons, according to the seasonal progression of the East Asian summer monsoon. The precipitation prediction skills for the two rainy seasons are investigated using subseasonal-to-seasonal (S2S) hindcast data from the European Centre for Medium-Range Weather Forecasts (ECMWF) for 2001–2019. The precipitation prediction
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Simulating 2-D magnetotelluric responses using vector-quantized temporal associative memory artificial neural network-based approaches Geosci. Lett. (IF 4.0) Pub Date : 2024-03-02 Phongphan Mukwachi, Banchar Arnonkijpanich, Weerachai Sarakorn
In this research, we explore the application of artificial neural networks, specifically the vector-quantized temporal associative memory (VQTAM) and VQTAM coupled with locally linear embedding (VQTAM-LLE) techniques, for simulating 2-D magnetotelluric forward modeling. The study introduces the concepts of VQTAM and VQTAM-LLE in the context of simulating 2-D magnetotelluric responses, outlining their
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Rethinking our world: a perspective on a cleaner globe emerging from reduced anthropogenic activities Geosci. Lett. (IF 4.0) Pub Date : 2024-02-27 Kim-Anh Nguyen, Yuei-An Liou
Stringent measures, such as lockdowns, were implemented to curb the virus's spread, leading to reduced pollution levels and environmental improvements at various geographic scales, from cities to regions and nations. Such positive effects have been found and reported for regional scales, but not for a global scale till nowadays. This study aims to fill the gap by uncovering the modifications of global
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Multi-year assessment of the impact of ship-borne radiosonde observations on polar WRF forecasts in the Arctic Geosci. Lett. (IF 4.0) Pub Date : 2024-02-26 Yonghan Choi, Joo-Hong Kim, Sang-Yoon Jun, Taejin Choi, Xiangdong Zhang
To compensate for the lack of conventional observations over the Arctic Ocean, ship-borne radiosonde observations have been regularly carried out during summer Arctic expeditions and the observed data have been broadcast via the global telecommunication system since 2017. With these data obtained over the data-sparse Arctic Ocean, observing system experiments were carried out using a polar-optimized
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China: legacy collieries versus renewable energy Geosci. Lett. (IF 4.0) Pub Date : 2024-02-25 Zhaoxiang Chu, Yiming Wang, Yukun Ji, Xiaozhao Li
The findings of the major strategic consulting project of Chinese Academy of Engineering ‘Research on the strategy of coal mine safety and abandoned mine resources development and utilization in China’ suggest that almost 13,000 discarded collieries in China will provide abundant surface lands and massive underground heritages to not only develop but also store renewable energy within the Earth’s Critical
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Enhanced impacts of the North Pacific Victoria mode on the Indian summer monsoon onset in recent decades Geosci. Lett. (IF 4.0) Pub Date : 2024-02-25 Suqin Zhang, Xia Qu, Gang Huang
Victoria mode (VM), the second dominant mode of North Pacific sea surface temperature variability, has been identified as one of the important factors influencing the Indian summer monsoon (ISM) onset. The positive phase of the May VM delays the ISM onset by both tropical and extratropical pathways. Here, we found a significant interdecadal enhancement of their relationship since the early 1990s, which
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Application of a weighted ensemble forecasting method based on online learning in subseasonal forecast in the South China Geosci. Lett. (IF 4.0) Pub Date : 2024-01-30 Fei Xin, Yichen Shen, Chuhan Lu
Under the proposal of “seamless forecasting”, it has become a key problem for meteorologists to improve the skills of subseasonal forecasts. Since the launch of the subseasonal-to-seasonal (S2S) plan by WMO, the precision of model predictions has been further developed. However, when we are focusing on the practical applications of models in the South China (SC) in recent years, we found that large
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Spatial analyses on pre-earthquake ionospheric anomalies and magnetic storms observed by China seismo-electromagnetic satellite in August 2018 Geosci. Lett. (IF 4.0) Pub Date : 2024-01-20 Jann-Yenq Tiger Liu, Xuhui Shen, Fu-Yuan Chang, Yuh-Ing Chen, Yang-Yi Sun, Chieh-Hung Chen, Sergey Pulinets, Katsumi Hattori, Dimitar Ouzounov, Valerio Tramutoli, Michel Parrot, Wei-Sheng Chen, Cheng-Yan Liu, Fei Zhang, Dapeng Liu, Xue-Min Zhang, Rui Yan, Qiao Wang
The China Seismo-Electromagnetic Satellite (CSES), with a sun-synchronous orbit at 507 km altitude, was launched on 2 February 2018 to investigate pre-earthquake ionospheric anomalies (PEIAs) and ionospheric space weather. The CSES probes manifest longitudinal features of four-peak plasma density and three plasma depletions in the equatorial/low-latitudes as well as mid-latitude troughs. CSES plasma
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3D thermal structural and dehydration modeling in the southern Chile subduction zone and its relationship to interplate earthquakes and the volcanic chain Geosci. Lett. (IF 4.0) Pub Date : 2024-01-19 Kaya Iwamoto, Nobuaki Suenaga, Shoichi Yoshioka, Francisco Ortega-Culaciati
In southern Chile, the Nazca plate is subducting beneath the South American plate. This region was struck by megathrust earthquakes in 1960 and 2010 and is characterized by the existence of a volcanic chain. In this region, we modeled a three-dimensional thermal structure associated with the subduction of the Nazca plate by using numerical simulations. Based on the obtained temperature distribution
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Use of GOCI-II images for detection of harmful algal blooms in the East China Sea Geosci. Lett. (IF 4.0) Pub Date : 2024-01-18 Yutao Jing, Chi Feng, Taisheng Chen, Yuanli Zhu, Changpeng Li, Bangyi Tao, Qingjun Song
The East China Sea (ECS) has experienced severe harmful algal blooms (HABs) that have deleterious ecological effects on marine organisms. Recent studies indicated that deploying of a second geostationary ocean color imager (GOCI-II) can significantly improve ocean monitoring. This study systematically assessed GOCI-II and its ability to detect HABs and distinguish between dinoflagellates and diatoms
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Estimating hourly surface shortwave radiation over northeast of the Tibetan Plateau by assimilating Himawari-8 cloud optical thickness Geosci. Lett. (IF 4.0) Pub Date : 2024-01-04 Tianyu Zhang, Husi Letu, Tie Dai, Chong Shi, Yonghui Lei, Yiran Peng, Yanluan Lin, Liangfu Chen, Jiancheng Shi, Wei Tian, Guangyu Shi
To reduce the uncertainty estimation of clouds and improve the forecast of surface shortwave radiation (SSR) over the Tibetan Plateau, a new cloud assimilation system is proposed which is the first attempt to directly apply the four-dimensional local ensemble transform Kalman filter method to assimilate the cloud optical thickness (COT). The high-resolution spatial and temporal data assimilated from
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Spatiotemporal slip distribution associated with the 2012–2016 Tokai long-term slow slip event inverted from GNSS data Geosci. Lett. (IF 4.0) Pub Date : 2023-12-21 Yukinari Seshimo, Hiroki Kawabata, Shoichi Yoshioka, Francisco Ortega-Culaciati
We used Global Navigation Satellite System (GNSS) time series data to estimate the spatiotemporal slip distribution for a long-term slow slip event (L-SSE) that occurred in the Tokai region, central Japan, from 2012 to 2016. Since all the used GNSS data were affected by the postseismic deformation associated with the 2011 Mw9.0 Tohoku-Oki earthquake, we removed such postseismic signal from the time
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Improved Indian Ocean dipole seasonal prediction in the new generation of CMA prediction system Geosci. Lett. (IF 4.0) Pub Date : 2023-12-11 Bo Liu, Kai Yang, Xiangwen Liu, Gang Huang, Benjamin Ng
Seasonal prediction of the Indian Ocean dipole (IOD) is important, considering its impact on the climate of surrounding regions. Here we compare the prediction of the IOD in two generations of prediction system developed by the China Meteorology Administration (CMA), i.e., the second-generation climate model prediction system (CPSv2) and CPSv3. The results show that CPSv3 has better ability to predict
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Magnitude determination using cumulative absolute absement for earthquake early warning Geosci. Lett. (IF 4.0) Pub Date : 2023-12-11 Yih-Min Wu, Himanshu Mittal, Yueh-Ho Lin, Yu-Hsuan Chang
The cumulative absolute absement (CAA) of the 3 s window after P-wave arrival can be used to estimate the magnitude ( $${M}_{CAA}$$ ) of an earthquake. This method can achieve good results even when only the six stations nearest to the epicenter are used. The standard deviation between the estimated CAA magnitude ( $${M}_{CAA}$$ ) and the moment magnitude ( $${M}_{w}$$ ) is found to be 0.3 when using
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A role for orbital eccentricity in Earth’s seasonal climate Geosci. Lett. (IF 4.0) Pub Date : 2023-12-08 John C. H. Chiang, Anthony J. Broccoli
The seasonality of Earth’s climate is driven by two factors: the tilt of the Earth’s rotation axis relative to the plane of its orbit (hereafter the tilt effect), and the variation in the Earth–Sun distance due to the Earth’s elliptical orbit around the Sun (hereafter the distance effect). The seasonal insolation change between aphelion and perihelion is only ~ 7% of the annual mean and it is thus
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Soil erosion modeling and sediment transport index analysis using USLE and GIS techniques in Ada’a watershed, Awash River Basin, Ethiopia Geosci. Lett. (IF 4.0) Pub Date : 2023-12-01 Abayneh Tilahun, Hayal Desta
Ethiopia faces a significant challenge in combating soil erosion. This study addresses the concern within Ada’a watershed of the Awash River basin. GIS and the Universal Soil Loss Equation (USLE) Model were used to predict soil loss and the sediment transport index (STI) in the Ada’a watershed of the Awash River basin. RUSLE model required intensive rainfall data registered continuously for 30 min
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Reconciling opposite trends in the observed and simulated equatorial Pacific zonal sea surface temperature gradient Geosci. Lett. (IF 4.0) Pub Date : 2023-11-23 Wenrong Bai, Hailong Liu, Pengfei Lin, Xichen Li, Fan Wang
The reasons for large discrepancies between observations and simulations, as well as for uncertainties in projections of the equatorial Pacific zonal sea surface temperature (SST) gradient, are controversial. We used CMIP6 models and large ensemble simulations to show that model bias and internal variabilities affected, i.e., strengthened, the SST gradient between 1981 and 2010. The underestimation
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Seismically-induced landslide probabilistic hazard mapping of Aba Prefecture and Chengdu Plain region, Sichuan Province, China for future seismic scenarios Geosci. Lett. (IF 4.0) Pub Date : 2023-11-23 Xiaoyi Shao, Siyuan Ma, Chong Xu, Jia Cheng, Xiwei Xu
The purpose of this work is to carry out seismically induced landslide probabilistic hazard mapping for future seismic scenarios of Aba Prefecture and Chengdu Plain region, Sichuan Province, China. Nine earthquake events that occurred in the regions and neighboring areas are selected, which include a total of 251,260 landslide records. This work used 12 influencing factors including elevation, slope
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Assessing hydroclimate response to land use/cover change using coupled atmospheric-hydrological models Geosci. Lett. (IF 4.0) Pub Date : 2023-11-22 Chia-Jeng Chen, Min-Hung Chi, Jing-Ru Ye
Modeling techniques provide a straightforward means to dissect regional hydroclimate in response to changes in land use conditions. This study uses the Weather Research and Forecasting Model (WRF) and WRF-Hydrological modeling system (WRF-Hydro), driven by survey-based land use data in 1995 and 2015, to assess how central Taiwan’s hydroclimate responds to land use/cover change. We first run WRF-Hydro
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Structures and stratigraphy of Al Jaww Plain, southeastern Al Ain, United Arab Emirates: implications for aquifer systems and mantle thrust sheet Geosci. Lett. (IF 4.0) Pub Date : 2023-11-19 Saif Ullah, Mohammed Y. Ali, Muhammad A. Iqbal, Fateh Bouchaala, Hakim Saibi
The United Arab Emirates (UAE) is dependent on desalinated water and shallow aquifers to satisfy its freshwater requirements. Despite the paramount importance of understanding the depth and spatial extent of these aquifers, comprehensive investigations into the properties of these aquifers, as well as the underlying subsurface structures and stratigraphy, have been conspicuously lacking. This study
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Statistical characterization of full-margin rupture recurrence for Cascadia subduction zone using event time resampling and Gaussian mixture model Geosci. Lett. (IF 4.0) Pub Date : 2023-11-13 Katsuichiro Goda
Earthquake occurrence modeling of large subduction events involves significant uncertainty, stemming from the scarcity of geological data and inaccuracy of dating techniques. The previous research on statistical modeling of full-margin ruptures of the Cascadia subduction zone attempted to address these issues. However, the adopted resampling method to account for the uncertain marine turbidite age
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The climate variability trio: stochastic fluctuations, El Niño, and the seasonal cycle Geosci. Lett. (IF 4.0) Pub Date : 2023-11-04 Malte F. Stuecker
Climate variability has distinct spatial patterns with the strongest signal of sea surface temperature (SST) variance residing in the tropical Pacific. This interannual climate phenomenon, the El Niño-Southern Oscillation (ENSO), impacts weather patterns across the globe via atmospheric teleconnections. Pronounced SST variability, albeit of smaller amplitude, also exists in the other tropical basins
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The landslide source of the eastern Mediterranean tsunami on 6 February 2023 following the Mw 7.8 Kahramanmaraş (Türkiye) inland earthquake Geosci. Lett. (IF 4.0) Pub Date : 2023-10-20 Mohammad Heidarzadeh, Aditya Riadi Gusman, Iyan E. Mulia
This paper presents the first example of how to systematically identify the submarine landslide source of a tsunami using an innovative hybrid approach. This ground-breaking method is developed to resolve the puzzle around the source mechanism of the mysterious tsunami observed on 6th February 2023 in the Eastern Mediterranean Sea. The tsunami followed the two inland Mw 7.8 and Mw 7.5 Türkiye–Syria
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Active sediment transport along trench axis: insights from X-ray fluorescence core scanning and magnetic analysis of marine sediments in the southwestern Ryukyu Trench Geosci. Lett. (IF 4.0) Pub Date : 2023-10-18 Kan-Hsi Hsiung, Toshiya Kanamatsu, Ken Ikehara, Masafumi Murayama, Yuhji Yamamoto
The southwestern Ryukyu Trench is an ideal place for investigating sediment transport from the Taiwan mountain belt to the Ryukyu Trench floor. To study the characteristics of trench turbidites and sediment transport along the trench, we utilize two piston cores: KR1518-PC04/PL04 at the southwestern end of Ryukyu Trench and YK1501-PC14/PL14 in the trench floor. We also collect two push cores, YK1611-6K1467MG
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Probabilistic seismic hazard assessments for Myanmar and its metropolitan areas Geosci. Lett. (IF 4.0) Pub Date : 2023-10-14 Huan-Bin Yang, Yuan-Kai Chang, Wei Liu, Guan-Yi Sung, Jia-Cian Gao, Myo Thant, Phyo Maung Maung, Chung-Han Chan
Although Myanmar is an earthquake-prone country, there has not been proposed an official national seismic hazard map. Thus, this study conducted a probabilistic seismic hazard assessment for Myanmar and some of its metropolitan areas. Performing this assessment required a set of databases that incorporates both earthquake catalogs and fault parameters. We obtained seismic parameters from the International
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Discovery of a conical feature in Halmahera waters, Indonesia: traces of a late-stage hydrothermal activity Geosci. Lett. (IF 4.0) Pub Date : 2023-10-13 Gabriella Alodia, Nurhidayat, Dyan P. Sobarudin, Dian Adrianto, Angga Dwinovantyo, Steven Solikin, Mustafa Hanafi, Astyka Pamumpuni, Idham A. Kurniawan, Poerbandono, Chris M. Green, Andrew M. McCaig
An expedition to confirm the presence of underwater hazards was carried out in Halmahera waters, Indonesia, to the west of Halmahera Island from August to September 2021. The expedition carried out a multibeam survey, surface-towed magnetic survey, and seafloor sampling. A ~ 615-m-tall conical feature with traces of hydrothermal activity was discovered. The feature is bounded on the southeastern (SE)
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Variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone Geosci. Lett. (IF 4.0) Pub Date : 2023-10-10 Wen-Bin Doo, Chung-Liang Lo, Yin-Sheng Huang, Wen-Nan Wu, Shiou-Ya Wang
The Ryukyu trench-arc-back arc system is part of the subduction margins of the Philippine Sea plate. Previous studies have indicated that several geophysical and geological characteristics reveal significant variations (including convergent rate, topography, subducting slab angle etc.) along this subduction system. In addition, the strength of plate coupling and the potential of large earthquake occurrence
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Near-surface atmospheric electric field changes through magnetic clouds via coronal mass ejections Geosci. Lett. (IF 4.0) Pub Date : 2023-09-30 Lei Li, Tao Chen, Chao Shen, Shuo Ti, Shihan Wang, Chunlin Cai, Wen Li, Jing Luo
The Earth’s electrical environment is influenced by both external and internal driving factors. Internal driving factors include the global charging current produced by lightning storms, global aerosol concentrations and cloud coverage. External factors are caused by various space weather phenomena, including changes in the Sun’s magnetic field, solar flares, coronal mass ejections, and ionization
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Correction: Evaluation of different machine learning models and novel deep learning-based algorithm for landslide susceptibility mapping Geosci. Lett. (IF 4.0) Pub Date : 2023-09-26 Tingyu Zhang, Yanan Li, Tao Wang, Huanyuan Wang, Tianqing Chen, Zenghui Sun, Dan Luo, Chao Li, Ling Han
Correction: Geoscience Letters (2022) 9:26 https://doi.org/10.1186/s40562-022-00236-9 In this article [1], the affiliation details for co-authors Huanyuan Wang and Ling Han were incorrectly given as ‘School of Land Engineering, Chang’an University, Xi’ani, 710054, Shaanx, China’, but should have been ‘Shaanxi Key Laboratory of Land Consolidation, School of Land Engineering, Chang’an University, Xi’an
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Structural analysis and susceptibility inversion based on ground magnetic data to map the chromite mineral resources: a case study of the Koh Safi Chromite Ore Deposit, Parwan, Afghanistan Geosci. Lett. (IF 4.0) Pub Date : 2023-09-22 Mohammad Hakim Rezayee, Mahdi Khalaj, Hideki Mizunaga
The Koh Safi Chromite Ore Deposit is located in Afghanistan’s northern–northeastern end of the Kabul–Kandahar ophiolite zone. Sedimentary formations, delayed volcanic, and ultramafic rock groups, including peridotites and serpentinites, could all have been found in the Koh Safi area, where structural discontinuities with the two trends of northwest–southeast and east–west can be identified. High-grade
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Sea surface temperature clustering and prediction in the Pacific Ocean based on isometric feature mapping analysis Geosci. Lett. (IF 4.0) Pub Date : 2023-09-07 John Chien-Han Tseng, Bo-An Tsai, Kaoshen Chung
Isometric feature mapping (ISOMAP) is a nonlinear dimensionality reduction method and closely reflects the actual nonlinear distance by the view of tracing along the local linearity in the original nonlinear structure. Thus, the first leading 20 principal components (PCs) of low-dimensional space can reveal the characteristics of real structures and be utilized for clustering. In this study, a k-means
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Slow slip event in the focal area of the 1975 Kurile tsunami earthquake inferred from unusual long-term seismic quiescence Geosci. Lett. (IF 4.0) Pub Date : 2023-09-06 Kei Katsumata
In subduction zones, slow slip events (SSEs) have been observed in the portion deeper than the downdip edge of seismogenic zone. However, since it is far offshore from geodetic networks on land, shallow SSEs near the trench axis are hardly observed. Despite of less quantitative than seafloor geodetic observations, a method for inferring the shallow SSEs based on seismic quiescence was presented in
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Regional variation of the influence of cross-equatorial northerly surge towards diurnal cycle of rainfall over Java Island Geosci. Lett. (IF 4.0) Pub Date : 2023-08-29 Madam Taqiyya Maulana, Takeshi Yamazaki, Toshiki Iwasaki, Muhammad Rais Abdillah
Cross-equatorial northerly surge (CENS) is known to cause torrential rainfall over Java Island in the Maritime Continent. Some studies indicated that the rainfall increase is attributed to changes in the diurnal cycle of rainfall (DCR) in northwestern Java. It is not well understood whether the DCR changes are present in the other parts of Java Island and whether the changes are similar to those in
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Tidal asymmetry and transition in the Singapore Strait revealed by GNSS interferometric reflectometry Geosci. Lett. (IF 4.0) Pub Date : 2023-08-25 Dongju Peng, Kit Ying Soon, Victor H. S. Khoo, Evert Mulder, Poh Weng Wong, Emma M. Hill
The Singapore Strait is located at the transition between the dominantly semidiurnal Indian Ocean and the mixed-to-diurnal South China Sea, resulting in complex tidal dynamics. In this work, we use sea-level estimates from two coastal Global Navigation Satellite Systems (GNSS) stations and one tide gauge to study tides and tidal asymmetry in the Strait. We first generate sea-level measurements from
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Impacts of biochar amendment and straw incorporation on soil heterotrophic respiration and desorption of soil organic carbon Geosci. Lett. (IF 4.0) Pub Date : 2023-08-21 Xiujun Wang, Zhu Zhu, Ni Huang, Lipeng Wu, Tongping Lu, Zhengjiang Hu
While biochar amendment and straw incorporation in soil have received great attention due to the potential of carbon sequestration and improvements in soil physicochemical properties, there were limited studies addressing their impacts on soil heterotrophic respiration over a seasonal cycle. Here, we conducted a field experiment to evaluate the effects of biochar amendment and straw incorporation on
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Ensemble size versus bias correction effects in subseasonal-to-seasonal (S2S) forecasts Geosci. Lett. (IF 4.0) Pub Date : 2023-08-19 Ji-Young Han, Sang-Wook Kim, Chang-Hyun Park, Seok-Woo Son
This study explores the ensemble size effect on subseasonal-to-seasonal (S2S) forecasts of the European Center for Medium-Range Weather Forecasts (ECMWF) model. The ensemble forecast skill and its sensitivity to the ensemble size are assessed for the troposphere and stratosphere, and compared with theoretical estimates under the perfect model assumption. The degree of skill improvement in ensemble-mean
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Preservation conditions and potential evaluation of the Longmaxi shale gas reservoir in the Changning area, southern Sichuan Basin Geosci. Lett. (IF 4.0) Pub Date : 2023-08-05 Weidong Xie, Si Chen, Huajun Gan, Hua Wang, Meng Wang, Veerle Vandeginste
The production of shale gas varies greatly in different regions due to the way gas has accumulated and preserved. This work investigates the dynamic evolution of shale gas generation, accumulation, adjustment, and loss from the Longmaxi formation (S1l) in the Changning area, southern Sichuan Basin, China. The factors controlling the preservation conditions and formation mechanism of the overpressure
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Evaluation of the seasonal to decadal variability in dynamic sea level simulations from CMIP5 to CMIP6 Geosci. Lett. (IF 4.0) Pub Date : 2023-08-04 Chenyang Jin, Hailong Liu, Pengfei Lin
Previous studies have revealed little progress in the ensemble mean of Coupled Model Intercomparison Project Phase 6 (CMIP6) models compared to Phase 5 (CMIP5) models in simulating global dynamic sea level (DSL). This study investigates the performance of the CMIP5 and CMIP6 ensembles in simulating the spatial pattern and magnitude of DSL climatology, seasonal variability, interannual variability,
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3-D thermal structure and dehydration near the Chile Triple Junction and its relation to slab window, tectonic tremors, and volcanoes Geosci. Lett. (IF 4.0) Pub Date : 2023-07-29 Kaya Iwamoto, Nobuaki Suenaga, Shoichi Yoshioka, Francisco Ortega-Culaciati, Matthew Miller, Javier Ruiz
The southern Chile subduction zone is a complex tectonic environment, where the Chile Ridge, the Nazca (NZ) and Antarctic (AN) plates subduct underneath the South American (SA) plate. The intersection between the NZ, AN and SA plates is referred to as the Chile Triple Junction (CTJ). In this region, a gap, often referred to as a slab window, has been formed between the NZ and AN slabs due to the divergence
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Relation of land surface temperature with different vegetation indices using multi-temporal remote sensing data in Sahiwal region, Pakistan Geosci. Lett. (IF 4.0) Pub Date : 2023-07-26 Sajjad Hussain, Ali Raza, Hazem Ghassan Abdo, Muhammad Mubeen, Aqil Tariq, Wajid Nasim, Muhammad Majeed, Hussein Almohamad, Ahmed Abdullah Al Dughairi
At the global and regional scales, green vegetation cover has the ability to affect the climate and land surface fluxes. Climate is an important factor which plays an important role in vegetation cover. This research aimed to study the changes in land cover and relation of different vegetation indices with temperature using multi-temporal satellite data in Sahiwal region, Pakistan. Supervised classification
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Uncertainties of monthly ocean bottom pressure from Gravity Recovery and Climate Experiment (GRACE): a case study at the Drake Passage Geosci. Lett. (IF 4.0) Pub Date : 2023-07-25 Chengcheng Yang, Xuhua Cheng, Jianhuang Qin
Several studies reported some aliasing errors of Ocean bottom pressure (OBP) data from Gravity Recovery and Climate Experiment (GRACE), although this data have been widely used to estimate the oceanic transports. In this study, the performances of monthly OBP data from six GRACE products with two different solutions are evaluated by comparisons with the observed records at the Drake Passage. Result
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Correction: Numerical simulation of a heavy rainfall event over Mindanao, Philippines, on 03 May 2017: mesoscale convective systems under weak large-scale forcing Geosci. Lett. (IF 4.0) Pub Date : 2023-07-10 Cathrene Lagare, Takeshi Yamazaki, Junshi Ito
Correction : Geoscience Letters (2023) 10:23 https://doi.org/10.1186/s40562-023-00277-8 Following publication of the original article (Lagare et al. 2023), the authors would like to correct the errors in Figs. 5 and 9 labels and some references. The authors have identified that Figs. 5 and 9 were mislabeled. Fig. 5 Spatial distributions of 9 h of accumulated a observation and b–f model rainfall (14:00–23:00
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A re-assessment of historical records pertaining to the activity of Mt. Baekdu (Paektu, Tianchi) volcano Geosci. Lett. (IF 4.0) Pub Date : 2023-07-08 Sung-Hyo Yun, Jeonghyun Lee, Cheolwoo Chang, Clive Oppenheimer
This study re-assesses the historical records pertaining to the activity of Mt. Baekdu according to volcanic phenomena. We categorized volcanic phenomena into five categories: rumbling, atmospheric abnormality, ash rain, ash cloud and phenomenon sightings, and investigated historical records (in Chinese) for each phenomenon and identified their volcanological implications. Among the volcanic phenomena
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Probing shallow subsurface structures in the arc-continent collision suture zone near Hualien in Eastern Taiwan with magnetotelluric methods Geosci. Lett. (IF 4.0) Pub Date : 2023-07-03 Ping-Yu Chang, Haiyina Hasbia Amania, Azhar Fikri, Jordi Mahardika Puntu, Ding-Jiun Lin, Chun-Hsiang Kuo, Chien-Ying Wang, Wen-Yen Chang
We used the magnetotelluric method (MT) to investigate near-surface structures at the northern end of the Longitudinal Valley in Hualien City, eastern Taiwan. This valley is considered the suture zone of the arc-continental collision between the Eurasian plate and the Philippine Sea plate, making it crucial to understand the geological settings at its northern end. We conducted MT measurements along
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Assessments of tree-ring intra-annual δ18O record for reconstructing hydroclimate with high temporal resolution Geosci. Lett. (IF 4.0) Pub Date : 2023-06-21 Yumiko Watanabe, Yoshito Katayama, Zhen Li, Takeshi Nakatsuka, Suyako Tazuru
Tree-ring cellulose oxygen isotopic ratios have been widely studied as a hydrological proxy in monsoonal Asia. There has been, however, little attempt to perform proxy assessment of the intra-annual isotopic data to reconstruct hydroclimate with higher temporal resolution. We presented new intra-annual cellulose oxygen isotopic records of Japanese cedar trees spanning A.D. 1918 to 2017, and validated
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Earthquake preparedness in an urban area: the case of Dhaka city, Bangladesh Geosci. Lett. (IF 4.0) Pub Date : 2023-06-08 Md Mostafizur Rahman, Asikunnaby, Nawshin Jahan Chaity, Hazem Ghassan Abdo, Hussein Almohamad, Ahmed Abdullah Al Dughairi, Motrih Al-Mutiry
This study aims to assess people’s preparedness for a potential earthquake in Dhaka, the capital of Bangladesh. We have employed a model with six dimensions of holistic individual preparedness. A self-reported online survey included 677 total participants. The multiple linear regression model and the Spearman rank correlation were used as needed. The majority of the participants (> 65%) did not have
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Households’ vulnerability assessment: empirical evidence from cyclone-prone area of Bangladesh Geosci. Lett. (IF 4.0) Pub Date : 2023-06-06 Md Mostafizur Rahman, Md. Saidul Islam Arif, Md. Tanvir Hossain, Hussein Almohamad, Ahmed Abdullah Al Dughairi, Motrih Al-Mutiry, Hazem Ghassan Abdo
Despite Bangladesh being vulnerable to cyclones, there is a dearth of research on cyclone vulnerability assessment. Assessing a household's vulnerability is considered a crucial step in avoiding the adverse effects of catastrophe risks. This research was conducted in the cyclone-prone district of Barguna, Bangladesh. This study's purpose is to evaluate this region's vulnerability. A questionnaire survey
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The 2022 Mw6.2 Pasaman, Indonesia, earthquake sequence and its implication of seismic hazard in central-west Sumatra Geosci. Lett. (IF 4.0) Pub Date : 2023-05-22 Rizki Wulandari, Chung-Han Chan, Adhi Wibowo
The 2022 Mw6.2 Pasaman earthquake took place in central-west Sumatra in association with activity in the Sumatran Fault system. This study clarifies the spatial and temporal distribution of the Pasaman earthquake sequence and forecasts the earthquake sequence’s impact on the seismicity in the vicinity and in the Sumatran Fault system. We first examined the seismicity before the mainshock and observed
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Sensor orientation of the TMD seismic network (Thailand) from P-wave particle motions Geosci. Lett. (IF 4.0) Pub Date : 2023-05-22 Patinya Pornsopin, Passakorn Pananont, Kevin P. Furlong, Eric Sandvol
The Thai Meteorological Department (TMD) seismic network began development in 2008. There are a total of 71 seismic stations consisting of 26 borehole stations and 45 surface stations currently installed. The three-component data from the TMD seismic network have been widely used in previous seismological studies. In a recent analysis, we have found that sensor orientation as reported in the site metadata
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Numerical simulation of a heavy rainfall event over Mindanao, Philippines, on 03 May 2017: mesoscale convective systems under weak large-scale forcing Geosci. Lett. (IF 4.0) Pub Date : 2023-05-20 Cathrene Lagare, Takeshi Yamazaki, Junshi Ito
A heavy rainfall event caused by mesoscale convective systems (MCSs) resulted in flooding over areas of Davao City in Mindanao Island, Philippines, on 03 May 2017. The event occurred during the summer season (April–May) under weak large-scale conditions. This study investigated the initiation and development of MCSs by performing high-resolution numerical simulations with the finest grid spacing of
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Effects of amendments on carbon and nitrogen fractions in agricultural soils of Yellow River Delta Geosci. Lett. (IF 4.0) Pub Date : 2023-05-11 Lipeng Wu, Kaijing Zhang, Xingyu Zhu, Tongping Lu, Xiujun Wang
Although various measurements (including organic amendments) have been used to ameliorate saline–alkaline soils, soil organic matter (SOM) remains low in most salt-affected agriculture soils. It was hypothesized that lower SOM level was partly attributable to weaker SOM stability (thus greater desorption) in the salt-affected soils. To test this hypothesis, we conducted a 16-week incubation experiment
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Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions Geosci. Lett. (IF 4.0) Pub Date : 2023-04-24 Koji Uno, Honoka Ohara, Kuniyuki Furukawa, Tatsuo Kanamaru
To test the hypothesis that a Cretaceous hairpin turn is absent in the apparent polar wander path (APWP) of the inner arc of southwestern Japanese island (southwest Japan), we refined a mid-Cretaceous (100 Ma) paleomagnetic pole from southwest Japan. Red mudstone samples from the 100 Ma Hayama Formation were collected for paleomagnetic analysis from eight sites in the Hayama area in the central part
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Modeling the impacts of projected climate change on wheat crop suitability in semi-arid regions using the AHP-based weighted climatic suitability index and CMIP6 Geosci. Lett. (IF 4.0) Pub Date : 2023-04-18 Karam Alsafadi, Shuoben Bi, Hazem Ghassan Abdo, Hussein Almohamad, Basma Alatrach, Amit Kumar Srivastava, Motrih Al-Mutiry, Santanu Kumar Bal, M. A. Sarath Chandran, Safwan Mohammed
Due to rapid population growth and the limitation of land resources, the sustainability of agricultural ecosystems has attracted more attention all over the world. Human activities will alter the components of the atmosphere and lead to climate change, which consequently affects crop production badly. In this context, wheat is considered an important crop and ranks as one of the top strategic crops
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Physics-informed deep learning framework to model intense precipitation events at super resolution Geosci. Lett. (IF 4.0) Pub Date : 2023-04-18 B. Teufel, F. Carmo, L. Sushama, L. Sun, M. N. Khaliq, S. Bélair, A. Shamseldin, D. Nagesh Kumar, J. Vaze
Physical modeling of precipitation at fine (sub-kilometer) spatial scales is computationally very expensive. This study develops a highly efficient framework for this task by coupling deep learning (DL) and physical modeling. This framework is developed and tested using regional climate simulations performed over a domain covering Montreal and adjoining regions, for the summers of 2015–2020, at 2.5 km
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Characterization of landslides: a vertical electrical sounding approach Geosci. Lett. (IF 4.0) Pub Date : 2023-04-15 W. A. P. P. Christopher, Nalin De Silva, A. M. A. N. B. Attanayake, Pathmakumara Jayasingha
The high groundwater activity typically found in landslide bodies favors electrical resistivity methods to characterize the subsurface of landslides. The more water present, the more the current injection into the ground and thus greater the depth of penetration. Furthermore, this generates a higher contrast between the stable and the unstable mass of the landslide. Being a cost-effective and a flexible
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Resonance characteristics and impact of the 2006 Pingtung tsunami in southern Taiwan Geosci. Lett. (IF 4.0) Pub Date : 2023-03-14 An-Chi Cheng, Anawat Suppasri, Kwanchai Pakoksung, Fumihiko Imamura
Tsunami resonance excitation induces tsunami amplification, persistent oscillation, and strong current velocities, which may enlarge coastal hazards in tsunamigenic areas. Historically, the 2006 Pingtung earthquake doublet triggered tsunamis that affected the south Taiwan coast. Studying the resonance features based on past tsunamis is important for assessing tsunami hazards and obtaining critical
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Intensity and timing of persistence barriers of global sea surface temperature anomalies Geosci. Lett. (IF 4.0) Pub Date : 2023-03-11 Feng Tian, Hong-Li Ren, Minghong Liu, Baohuang Su, Run Wang
Due to its intrinsic connection to predictability, persistence barrier (PB) has been known as a crucial property of some important phenomena like El Niño-Southern Oscillation (ENSO), typically depicted as a rapid decline of persistence of sea surface temperature (SST) anomalies occurring at a specific season. This study reveals the PB characteristics of the global SST anomalies by extending the ENSO
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Responses of soil organic and inorganic carbon to organic and phosphorus fertilization in a saline − alkaline paddy field Geosci. Lett. (IF 4.0) Pub Date : 2023-03-09 Xiujun Wang, Haonan Zheng, Lipeng Wu, Xiaodong Ding, Tongping Lu
There is evidence of increased soil organic carbon (SOC) and inorganic carbon (SIC) under fertilization in dry croplands of arid and semi-arid areas. However, not much is known about the responses of SOC and SIC in coastal saline − alkaline paddy soils that undergo flooding − draining cycles. Here, we assess the impacts of various combinations of organic and phosphorus fertilization on SOC and SIC