Open Access. Powered by Scholars. Published by Universities.®

Earth Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

30,020 Full-Text Articles 46,911 Authors 6,501,656 Downloads 243 Institutions

All Articles in Earth Sciences

Faceted Search

30,020 full-text articles. Page 1 of 783.

Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith 2021 Texas Tech University

Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith

Journal of Global Education and Research

Multiple American educational organizations such as the National Education Association, Association for Supervision and Curriculum Development, and the Council of Chief State School Officers have advocated for globalizing the K-12 curriculum. The National Science Teaching Association (NSTA) in a position statement on international education and the Next Generation Science Standards have produced goals and standards for internationalizing the science curriculum by addressing topics such as climate change, environment, and disease that cross borders. In contrast to those pronouncements on the curriculum, this article views global science education through an instructional lens that focuses on a students’ global interdependence in science ...


Spatially Extensive Ground‐Penetrating Radar Snow Depth Observations During Nasa's 2017 Snowex Campaign: Comparison With In Situ, Airborne, And Satellite Observations, Hans-Peter Marshall 2021 Boise State University

Spatially Extensive Ground‐Penetrating Radar Snow Depth Observations During Nasa's 2017 Snowex Campaign: Comparison With In Situ, Airborne, And Satellite Observations, Hans-Peter Marshall

Geosciences Faculty Publications and Presentations

Seasonal snow is an important component of Earth's hydrologic cycle and climate system, yet it remains challenging to consistently and accurately measure snow depth and snow water equivalent (SWE) across the range of diverse snowpack conditions that exist on Earth. The NASA SnowEx campaign is focused on addressing the primary gaps in snow remote sensing in order to gain an improved spatiotemporal understanding of this important resource and to further efforts toward a future satellite‐based snow remote sensing mission. Ground‐penetrating radar (GPR) is an efficient and mature approach for measuring snow depth and SWE. We collected ~1 ...


Membrane Inlet Mass Spectrometry Method (Reox/Mims) To Measure 15n-Nitrate In Isotope-Enrichment Experiments, Xianbiao Lin, Kaijun Lu, Amber K. Hardison, et al 2021 Virginia Institute of Marine Science

Membrane Inlet Mass Spectrometry Method (Reox/Mims) To Measure 15n-Nitrate In Isotope-Enrichment Experiments, Xianbiao Lin, Kaijun Lu, Amber K. Hardison, Et Al

VIMS Articles

Using 15N stable isotope as a tracer to quantify N transformation rates in isotope-enrichment experiments improves understanding of the N cycle in various ecosystems. However, measuring 15N-nitrate (15NO3) in small volumes of water for these experiments is a major challenge due to the inconvenience of preparing samples by traditional techniques. We developed a “REOX/MIMS” method by applying membrane inlet mass spectrometry (MIMS) to determining 15NO3 concentrations in a small volumes of water from isotope-enrichment experiments after converting the dissolved inorganic N to N2. The nitrates (NO3 + NO2) were reduced to ...


Effects Of Phenological Stages On Forage Quality In Nine Range Species In Alborz Rangelands, N. Charehsaz, Hossein Arzani, A. A. Jafari 2021 University of Tehran, Iran

Effects Of Phenological Stages On Forage Quality In Nine Range Species In Alborz Rangelands, N. Charehsaz, Hossein Arzani, A. A. Jafari

International Grassland Congress Proceedings

No abstract provided.


Study On Optimum Cultivation Techniques Of Alfalfa On Songnen Plain, Fengjiu Chai, Zedong Liu 2021 Institute of Animal Science of Heilongjiang Province, China

Study On Optimum Cultivation Techniques Of Alfalfa On Songnen Plain, Fengjiu Chai, Zedong Liu

International Grassland Congress Proceedings

No abstract provided.


Fermentation Quality Of Silage Prepared With Bacteriocin‐Producing Probiotic Lactic Acid Bacteria, Yimin Cai, Saïd Ennahar, Ramli Mohd Noor, Chuncheng Xu, Ryuichi Uegaki, Norio Yoshida 2021 National Institute of Livestock and Grassland Science, Japan

Fermentation Quality Of Silage Prepared With Bacteriocin‐Producing Probiotic Lactic Acid Bacteria, Yimin Cai, Saïd Ennahar, Ramli Mohd Noor, Chuncheng Xu, Ryuichi Uegaki, Norio Yoshida

International Grassland Congress Proceedings

No abstract provided.


Chemical Composition Of Range Plants Of Vital Fodder Value For Livestock‐Based Economy In Uttarakhand Himalaya, India, Babita Bohra, Vir Singh, R. D. Gaur 2021 International Centre for Integrated Mountain Development, Nepal

Chemical Composition Of Range Plants Of Vital Fodder Value For Livestock‐Based Economy In Uttarakhand Himalaya, India, Babita Bohra, Vir Singh, R. D. Gaur

International Grassland Congress Proceedings

No abstract provided.


Dynamic Fermentation Characteristics Of Alfalfa Silage With Additives, C. S. Bai, Z. Yu, Y. L. Xue, Q. F. Xu 2021 Shenyang Agricultural University, China

Dynamic Fermentation Characteristics Of Alfalfa Silage With Additives, C. S. Bai, Z. Yu, Y. L. Xue, Q. F. Xu

International Grassland Congress Proceedings

No abstract provided.


Perovskia Abrotanoides As A Plant For Multi‐Purpose Uses, Hossein Azarnivand, Marzieh Alikhah Asl, Mohammad Jafari 2021 University of Tehran, Iran

Perovskia Abrotanoides As A Plant For Multi‐Purpose Uses, Hossein Azarnivand, Marzieh Alikhah Asl, Mohammad Jafari

International Grassland Congress Proceedings

No abstract provided.


Effects Of Between Row And Within Row Spacing On Alfalfa Seed Quality, Tiejun Zhang, Jianguo Han, Xianguo Wang, Yunwen Wang, Peisheng Mao 2021 China Agricultural University, China

Effects Of Between Row And Within Row Spacing On Alfalfa Seed Quality, Tiejun Zhang, Jianguo Han, Xianguo Wang, Yunwen Wang, Peisheng Mao

International Grassland Congress Proceedings

No abstract provided.


Effect Of Saline‐Alkali Stress On Seed Germination Involving Grain Amaranth, Deying Zhang, Yuxia Zhang 2021 Ministry of Agriculture, China

Effect Of Saline‐Alkali Stress On Seed Germination Involving Grain Amaranth, Deying Zhang, Yuxia Zhang

International Grassland Congress Proceedings

No abstract provided.


The Study On The Period Of Stigma Keeping Vitality And Optimum Pollinated Time Of Madicago Varia Martin. Cv. 'Xinmu. No. 1', Aiqin Zhang, Dunyan Tan, Jinzhong Zhu 2021 Xinjiang University, China

The Study On The Period Of Stigma Keeping Vitality And Optimum Pollinated Time Of Madicago Varia Martin. Cv. 'Xinmu. No. 1', Aiqin Zhang, Dunyan Tan, Jinzhong Zhu

International Grassland Congress Proceedings

No abstract provided.


Effect Of Temperature And Moisture On Physical Dormancy Release In Two Populations Of Sophora Alopecuroides, L. Yang, Yanrong Wang, X. W. Hu 2021 Lanzhou University, China

Effect Of Temperature And Moisture On Physical Dormancy Release In Two Populations Of Sophora Alopecuroides, L. Yang, Yanrong Wang, X. W. Hu

International Grassland Congress Proceedings

No abstract provided.


Spectral Ground Motion Characteristics Of Induced Earthquakes In The Fort Worth Basin, Texas, SeongJu Jeong 2021 Southern Methodist University

Spectral Ground Motion Characteristics Of Induced Earthquakes In The Fort Worth Basin, Texas, Seongju Jeong

Earth Sciences Theses and Dissertations

Concurrent with the development of unconventional oil and gas production, seismicity in the central United States has dramatically increased. Previous studies in many locations suggest that the earthquakes reactivate pre-existing faults, as a result of changing subsurface stresses due to injection of fluids from wastewater disposal wells. This sudden rise in seismicity rate motivates an assessment and possible mitigation of seismic hazard due to the proximity of induced seismicity to metropolitan areas like the Dallas-Fort Worth, Texas.

Successful assessment and mitigation of earthquake hazards requires estimates of ground motion parameters representing path attenuation, site effects and source characteristics constrained by ...


Enhancing Infrasonic Signal Detection And Event Localization Through Advanced Computational Methods, Fransiska Dannemann Dugick 2021 Southern Methodist University

Enhancing Infrasonic Signal Detection And Event Localization Through Advanced Computational Methods, Fransiska Dannemann Dugick

Earth Sciences Theses and Dissertations

The installation of worldwide infrasound and seismo-acoustic networks at both global and regional scales necessitates automated techniques and algorithms for accurate and efficient data processing and analysis. Signals recorded across the networks originate from a number of natural and anthropogenic sources. Data processing efforts focus on the separation of signals of interest from background noise, followed by the identification, or detection of signals of interest. Once signals are identified, association and location processing produces estimates of a signal's source. This dissertation focuses on the evaluation of automated processes for identifying and locating sources of interest.

Chapter two applies two ...


Characterization Of Landslide Processes From Radar Remote Sensing And Hydromechanical Modeling, Yuankun Xu 2021 Southern Methodist University

Characterization Of Landslide Processes From Radar Remote Sensing And Hydromechanical Modeling, Yuankun Xu

Earth Sciences Theses and Dissertations

Landsides are a natural geomorphic process yet a dangerous hazard which annually causes thousands of casualties and billions of property loss in a global scale. Understanding landslide motion kinematics from early initiation to final deposition is critical for monitoring, assessing, and forecasting landslide movement in order to mitigate their hazards. Landslides occur under diverse environmental settings and appear in variable types; however, all types of landslides can be mechanically attributed to shearing failure at the basal surface due to stress regime shift contributed by internal and/or external forcing. Typical internal factors include soil/rock weathering, whereas typical external triggering ...


Effect Of Nitrogen And Foliar Spray Of Bio‐Regulators On Seed Production Of Lasiurus Sindicus, Nagendra Singh Yadava 2021 Rajasthan Agricultural University, India

Effect Of Nitrogen And Foliar Spray Of Bio‐Regulators On Seed Production Of Lasiurus Sindicus, Nagendra Singh Yadava

International Grassland Congress Proceedings

No abstract provided.


Effect Of Ion‐Beam Implantation On Seed Vigor Of Roegneria Kamoji Ohwi, Jihong Xie, Zuogong Wu, Yunzhang Liang, Zhu Xu, Linhang Li, Tingjie Hao, Yubao Ma 2021 Grassland Research Institute of Chinese Agriculture Science, China

Effect Of Ion‐Beam Implantation On Seed Vigor Of Roegneria Kamoji Ohwi, Jihong Xie, Zuogong Wu, Yunzhang Liang, Zhu Xu, Linhang Li, Tingjie Hao, Yubao Ma

International Grassland Congress Proceedings

No abstract provided.


Effects Of Phosphorus And Potassium On Alfalfa Seed Quality, Xianguo Wang, Jianguo Han, Zhiguang Geng, Peisheng Mao, Yunwen Wang 2021 China Agricultural University, China

Effects Of Phosphorus And Potassium On Alfalfa Seed Quality, Xianguo Wang, Jianguo Han, Zhiguang Geng, Peisheng Mao, Yunwen Wang

International Grassland Congress Proceedings

No abstract provided.


Different Seed Dormancy Levels Imposed By Tissues Covering The Caryopsis In Strains Of Zoysiagrass (Zoysia Japonica Steud.), Yunwen Wang, Jianguo Han, Manli Li, Jiefeng Sun, Yong He 2021 China Agricultural University, China

Different Seed Dormancy Levels Imposed By Tissues Covering The Caryopsis In Strains Of Zoysiagrass (Zoysia Japonica Steud.), Yunwen Wang, Jianguo Han, Manli Li, Jiefeng Sun, Yong He

International Grassland Congress Proceedings

No abstract provided.


Digital Commons powered by bepress