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

Earth Sciences Commons™

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

2021

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 15571 - 15600 of 16206

Full-Text Articles in Earth Sciences

On The Genesis Of Aluminum-Rich Speleothems In A Granite Cave Of Nw Spain, Jorge Sanjurjo-Sanchez, Carlos Arce Chamorro, Juan Ramón Vidal Romaní, Marcos Vaqueiro-Rodríguez, Victor Barrientos, Joeri Kaal Feb 2021

On The Genesis Of Aluminum-Rich Speleothems In A Granite Cave Of Nw Spain, Jorge Sanjurjo-Sanchez, Carlos Arce Chamorro, Juan Ramón Vidal Romaní, Marcos Vaqueiro-Rodríguez, Victor Barrientos, Joeri Kaal

International Journal of Speleology

Granite massifs often contain caves, with dimensions ranging from a few meters up to 1,000 m, also referred to as pseudokarst. The speleothems in such caves are mostly composed of either Si-rich (commonly opal-A) or Al-rich authigenic mineraloids. Whereas the formation and geochemical composition of opal-A biospeleothems have been studied and are fairly well understood, knowledge on the Al-rich analogues is scarce. This work reports for the first time a study on the composition, accretion process, age and growth rate of an Al-rich speleothem type flowstone from the A Trapa Cave System (Galicia, NW Spain), developed in a granite cave. …


Synergies Among Environmental Science Research And Monitoring Networks: A Research Agenda, J. A. Jones, P. M. Groffman, J. Blair, F. W. Davis, H. Dugan, E. E. Euskirchen, Serita D. Frey, T. K. Harms, E. Hinckley, M. Kosmala, S. Loberg, S. Malone, K. Novick, S. Malone, K. Novick, S. Record, A. V. Rocha, B. L. Ruddell, E. H. Stanley, C. Sturtevant, A. Thorpe, T. White, W. R. Wieder, L. Zhai, K. Zhu Feb 2021

Synergies Among Environmental Science Research And Monitoring Networks: A Research Agenda, J. A. Jones, P. M. Groffman, J. Blair, F. W. Davis, H. Dugan, E. E. Euskirchen, Serita D. Frey, T. K. Harms, E. Hinckley, M. Kosmala, S. Loberg, S. Malone, K. Novick, S. Malone, K. Novick, S. Record, A. V. Rocha, B. L. Ruddell, E. H. Stanley, C. Sturtevant, A. Thorpe, T. White, W. R. Wieder, L. Zhai, K. Zhu

Faculty Publications

Many research and monitoring networks in recent decades have provided publicly available data documenting environmental and ecological change, but little is known about the status of efforts to synthesize this information across networks. We convened a working group to assess ongoing and potential cross-network synthesis research and outline opportunities and challenges for the future, focusing on the US-based research network (the US Long-Term Ecological Research network, LTER) and monitoring network (the National Ecological Observatory Network, NEON). LTER-NEON cross-network research synergies arise from the potentials for LTER measurements, experiments, models, and observational studies to provide context and mechanisms for interpreting NEON …


Redefining The Age Of The Lower Colorado River, Southwestern United States, R. S. Crow, J. Schwing, K. E. Karlstrom, M. Heizler, P. A. Pearthree, P. K. House, S. Dulin, Susanne U. Jänecke, M. Stelten, L. J. Crossey Feb 2021

Redefining The Age Of The Lower Colorado River, Southwestern United States, R. S. Crow, J. Schwing, K. E. Karlstrom, M. Heizler, P. A. Pearthree, P. K. House, S. Dulin, Susanne U. Jänecke, M. Stelten, L. J. Crossey

Geosciences Faculty Publications

Sanidine dating and magnetostratigraphy constrain the timing of integration of the lower Colorado River (southwestern United States and northern Mexico) with the evolving Gulf of California. The Colorado River arrived at Cottonwood valley (Nevada and Arizona) after 5.24 Ma (during or after the Thvera subchron). The river reached the proto–Gulf of California once between 4.80 and 4.63 Ma (during the C3n.2r subchron), not at 5.3 Ma and 5.0 Ma as previously proposed. Duplication of section across newly identified strands of the Earthquake Valley fault zone (California) probably explains the discrepancy. The data also imply the start of focused plate motion …


Effect Of Low Temperature Stress On Malondialdehyde (Mda) Contents In Alfalfa Taproots, P. Li, Jianguo Han, Y. W. Wang Feb 2021

Effect Of Low Temperature Stress On Malondialdehyde (Mda) Contents In Alfalfa Taproots, P. Li, Jianguo Han, Y. W. Wang

IGC Proceedings (1977-2023)

No abstract provided.


Genetic Analysis Of Genotype X Environment Interaction For Yield Components Of E. Canadensis, E. Sibiricus And Their Hybrids, Jinghuan Li, Jinfeng Yun, Shuyan Wang Feb 2021

Genetic Analysis Of Genotype X Environment Interaction For Yield Components Of E. Canadensis, E. Sibiricus And Their Hybrids, Jinghuan Li, Jinfeng Yun, Shuyan Wang

IGC Proceedings (1977-2023)

No abstract provided.


Effect Of Nthk1 Gene To Transgenic Alfalfa Leaf Enlargement, Cong Li, Chengjun Deng Feb 2021

Effect Of Nthk1 Gene To Transgenic Alfalfa Leaf Enlargement, Cong Li, Chengjun Deng

IGC Proceedings (1977-2023)

No abstract provided.


The Effect Of Utilization Method On The Changes Of Species Composition Of Sward With Share Of Festulolium Loliaceum (Huds.) P. Fourn., Mariusz Kulik Feb 2021

The Effect Of Utilization Method On The Changes Of Species Composition Of Sward With Share Of Festulolium Loliaceum (Huds.) P. Fourn., Mariusz Kulik

IGC Proceedings (1977-2023)

No abstract provided.


Field Performance Of Transgenic Tall Fescue (Festuca Arundinacea Schreb.) With Enhanced Tolerance To Environmental Stress, Ki-Yong Kim, Sang-Hoon Lee, Gi-Jun Choi, Hee-Chung Ji, Joung-Kyong Lee, Keun-Bal Lim, Byung-Ryul Seong, Sung Seo, Byung‐Hyun Lee, Sang‐Soo Kwak Feb 2021

Field Performance Of Transgenic Tall Fescue (Festuca Arundinacea Schreb.) With Enhanced Tolerance To Environmental Stress, Ki-Yong Kim, Sang-Hoon Lee, Gi-Jun Choi, Hee-Chung Ji, Joung-Kyong Lee, Keun-Bal Lim, Byung-Ryul Seong, Sung Seo, Byung‐Hyun Lee, Sang‐Soo Kwak

IGC Proceedings (1977-2023)

No abstract provided.


Development Of Transgenic Tall Fescue Plants With Enhanced Tolerance To Multiple Abiotic Stresses, K. H. Kim, Sang‐Hoon Lee, K. W. Lee, C. H. Park, I. Alam, D. G. Lee, Sang‐Soo Kwak, Byung‐Hyun Lee Feb 2021

Development Of Transgenic Tall Fescue Plants With Enhanced Tolerance To Multiple Abiotic Stresses, K. H. Kim, Sang‐Hoon Lee, K. W. Lee, C. H. Park, I. Alam, D. G. Lee, Sang‐Soo Kwak, Byung‐Hyun Lee

IGC Proceedings (1977-2023)

No abstract provided.


Scanning Electron Microscope (Sem) Of Leaf Cell Morphology And Inheritance For Corn Leaf Aphid (Cla) Resistance In Maize, Hee-Chung Ji, Joung-Kyong Lee, B. R. Sung, K. Y. Kim, K. J. Choi, Keun-Bal Lim, W. H. Kim, Sung Seo Feb 2021

Scanning Electron Microscope (Sem) Of Leaf Cell Morphology And Inheritance For Corn Leaf Aphid (Cla) Resistance In Maize, Hee-Chung Ji, Joung-Kyong Lee, B. R. Sung, K. Y. Kim, K. J. Choi, Keun-Bal Lim, W. H. Kim, Sung Seo

IGC Proceedings (1977-2023)

No abstract provided.


Effect Of Calcium On Drought Resistance Of Alfalfa Seedling, Yibao Jiang, Guowen Cui, Chengzhang Wang, Xuebing Yan Feb 2021

Effect Of Calcium On Drought Resistance Of Alfalfa Seedling, Yibao Jiang, Guowen Cui, Chengzhang Wang, Xuebing Yan

IGC Proceedings (1977-2023)

No abstract provided.


Breeding For Cold‐Tolerant Lines Of Stylosanthes Guianensis In Southern China, Zhenfei Guo, Huashan Tang, Guozheng Xie, Yuejing Niu, Youguang Chen, Shaoyun Lu Feb 2021

Breeding For Cold‐Tolerant Lines Of Stylosanthes Guianensis In Southern China, Zhenfei Guo, Huashan Tang, Guozheng Xie, Yuejing Niu, Youguang Chen, Shaoyun Lu

IGC Proceedings (1977-2023)

No abstract provided.


Photosynthesis And Productivity Of New Lines And Released Cultivars Of Whipgrass In A Southwest China Environment, Lingzhi Chen, Chunhua Yang, Xiantao Fu, Fang Li, Wenjun Zhang Feb 2021

Photosynthesis And Productivity Of New Lines And Released Cultivars Of Whipgrass In A Southwest China Environment, Lingzhi Chen, Chunhua Yang, Xiantao Fu, Fang Li, Wenjun Zhang

IGC Proceedings (1977-2023)

No abstract provided.


Genetic Resources Of Temperate Legumes For Improving Forage Quality In Russia, V. F. Chapurin, A. V. Bukhteeva Feb 2021

Genetic Resources Of Temperate Legumes For Improving Forage Quality In Russia, V. F. Chapurin, A. V. Bukhteeva

IGC Proceedings (1977-2023)

No abstract provided.


Early Mesoproterozoic Evolution Of Midcontinental Laurentia: Defining The Geon 14 Baraboo Orogeny, L. Gordon Medaris Jr, Brad S. Singer, Brian R. Jicha, David H. Malone, Joshua J. Schwartz, Esther K. Stewart, Amanda Van Lankvelt, Michael L. Williams, Peter W. Reiners Feb 2021

Early Mesoproterozoic Evolution Of Midcontinental Laurentia: Defining The Geon 14 Baraboo Orogeny, L. Gordon Medaris Jr, Brad S. Singer, Brian R. Jicha, David H. Malone, Joshua J. Schwartz, Esther K. Stewart, Amanda Van Lankvelt, Michael L. Williams, Peter W. Reiners

Faculty Publications - Geography, Geology, and the Environment

New geochronologic data from midcontinental Laurentia demonstrate that emplacement of the 1476–1470 Ma Wolf River granitic batholith was not an isolated igneous event, but was accompanied by regional metamorphism, deformation, and sedimentation. Evidence for such metamorphism and deformation is best seen in siliciclastic sedimentary rocks of the Baraboo Interval, which were deposited closely following the 1.65–1.63 Ga Mazatzal orogeny. In Baraboo Interval strata, muscovite parallel to slatey cleavage, in hydrothermal veins, in quartzite breccia, and in metamorphosed paleosol yielded 40Ar/39Ar plateau ages of 1493–1465 Ma. In addition, U–Th–total Pb dating of neoblastic overgrowths on detrital monazite gave an age of …


Identification, Evaluation And Molecular Characterization Of Stylosanthes Seabrana--A Potential And Nutritious Range Legume Having Wider Applicability In India, A. Chandra, R. K. Bhatt, A. B. Majumdar, S. Kumar, D. Nagaich, K. Kumar Feb 2021

Identification, Evaluation And Molecular Characterization Of Stylosanthes Seabrana--A Potential And Nutritious Range Legume Having Wider Applicability In India, A. Chandra, R. K. Bhatt, A. B. Majumdar, S. Kumar, D. Nagaich, K. Kumar

IGC Proceedings (1977-2023)

No abstract provided.


Overexpression Of The Arabidopsis Avp 1 Gene Enhanced The Salt‐ And Drought‐Tolerance Intransgenic Alfalfa (Medicago Sativa L.), Aike Bao, Suomin Wang, Guoqiang Wu, Jiejun Xi, Jinlin Zhang Feb 2021

Overexpression Of The Arabidopsis Avp 1 Gene Enhanced The Salt‐ And Drought‐Tolerance Intransgenic Alfalfa (Medicago Sativa L.), Aike Bao, Suomin Wang, Guoqiang Wu, Jiejun Xi, Jinlin Zhang

IGC Proceedings (1977-2023)

No abstract provided.


Evaluation For Seed Yield And Seed Components Among Accessions Of Crested Wheatgrass (Agropyron Desertorum And Agropyron Cristatum), R. Taghizadeh, A. Jafari, R. Choukan, A. Asghari Feb 2021

Evaluation For Seed Yield And Seed Components Among Accessions Of Crested Wheatgrass (Agropyron Desertorum And Agropyron Cristatum), R. Taghizadeh, A. Jafari, R. Choukan, A. Asghari

IGC Proceedings (1977-2023)

No abstract provided.


Relationship Among Seed Parameters And Flowering Cycles On Three Gamba Grass (Andropogon Gayanus Kunth) Segregating Populations, R. Usberti, J. A. Usberti Jr., P. B. Alcantara, V. B. G. Alcantara, Waldssimiler T. Mattos, R. A. Possenti, Luciana Gerdes, M. A. C. Lucena, A. T. Tsuhako Feb 2021

Relationship Among Seed Parameters And Flowering Cycles On Three Gamba Grass (Andropogon Gayanus Kunth) Segregating Populations, R. Usberti, J. A. Usberti Jr., P. B. Alcantara, V. B. G. Alcantara, Waldssimiler T. Mattos, R. A. Possenti, Luciana Gerdes, M. A. C. Lucena, A. T. Tsuhako

IGC Proceedings (1977-2023)

No abstract provided.


Selection For Low Oxalic Acid Content On Three Setarias Phacelata Segregating Populations, J. A. Usberti Jr., R. Usberti, P. B. Alcantara, W. B. G. Alcantara, R. A. Possenti, Waldssimiler T. Mattos, M. A. C. Lucena, Luciana Gerdes, A. T. Tsuhako Feb 2021

Selection For Low Oxalic Acid Content On Three Setarias Phacelata Segregating Populations, J. A. Usberti Jr., R. Usberti, P. B. Alcantara, W. B. G. Alcantara, R. A. Possenti, Waldssimiler T. Mattos, M. A. C. Lucena, Luciana Gerdes, A. T. Tsuhako

IGC Proceedings (1977-2023)

No abstract provided.


Drought‐Tolerance In Perennial Ryegrass: A Cisgenic® Approach, Kerry Templeton, C. Bryant, M. Biswas, G. Gill, S. Bajaj, P. Sathish, C. Hanley Feb 2021

Drought‐Tolerance In Perennial Ryegrass: A Cisgenic® Approach, Kerry Templeton, C. Bryant, M. Biswas, G. Gill, S. Bajaj, P. Sathish, C. Hanley

IGC Proceedings (1977-2023)

No abstract provided.


Snow Ensemble Uncertainty Project (Seup): Quantification Of Snow Water Equivalent Uncertainty Across North America Via Ensemble Land Surface Modeling, Hans-Peter Marshall Feb 2021

Snow Ensemble Uncertainty Project (Seup): Quantification Of Snow Water Equivalent Uncertainty Across North America Via Ensemble Land Surface Modeling, Hans-Peter Marshall

Geosciences Faculty Publications and Presentations

The Snow Ensemble Uncertainty Project (SEUP) is an effort to establish a baseline characterization of snow water equivalent (SWE) uncertainty across North America with the goal of informing global snow observational needs. An ensemble-based modeling approach, encompassing a suite of current operational models is used to assess the uncertainty in SWE and total snow storage (SWS) estimation over North America during the 2009–2017 period. The highest modeled SWE uncertainty is observed in mountainous regions, likely due to the relatively deep snow, forcing uncertainties, and variability between the different models in resolving the snow processes over complex terrain. This highlights a …


From Hector Mine M7.1 To Ridgecrest M7.1 Earthquake. A Look From A 20-Year Perspective, Sergey Pulinets, Marina Tsidilina, Dimitar Ouzounov, Dmitry Davidenko Feb 2021

From Hector Mine M7.1 To Ridgecrest M7.1 Earthquake. A Look From A 20-Year Perspective, Sergey Pulinets, Marina Tsidilina, Dimitar Ouzounov, Dmitry Davidenko

Mathematics, Physics, and Computer Science Faculty Articles and Research

The paper provides a comparative analysis of precursory phenomena in the ionosphere and atmosphere for two strong earthquakes of the same magnitude M7.1 that happened in the same region (North-East from Los Angeles) within a time span of 20 years, the Hector Mine and Ridgecrest earthquakes. Regardless of the similarity of their location (South-Eastern California, near 160 km one from another), there was one essential difference: the Hector Mine earthquake happened during geomagnetically disturbed conditions (essential in the sense of ionospheric precursors identification). In contrast, the quiet geomagnetic conditions characterized the period around the time of the Ridgecrest earthquake. The …


Investigating The Lagged Relationship Between Smap Soil Moisture And Live Fuel Moisture In California, Usa, Shenyue Jia, Seung Hee Kim, Son V. Nghiem, Keun Hang S. Yang, Menas Kafatos Feb 2021

Investigating The Lagged Relationship Between Smap Soil Moisture And Live Fuel Moisture In California, Usa, Shenyue Jia, Seung Hee Kim, Son V. Nghiem, Keun Hang S. Yang, Menas Kafatos

Mathematics, Physics, and Computer Science Faculty Articles and Research

Live fuel moisture (LFM), defined as the ratio between water in the fresh biomass out of the dry biomass, is a vital measurement of vegetation water content and flammability. In this study, we investigated the dynamics of in-situ measurement of LFM at all the active sites in California, USA and revealed the difference between evergreen forest and shrub/scrub, the two dominant land cover types in California's fire-prone regions. We found that LFM of evergreen forest responses to soil moisture increase later than shrub/scrub, due to a later occurrence of major precipitation, a lower air temperature, and the different plant physiology. …


Preliminary Evaluation Of Lespedeza Juncea Var. Sericea In South‐Western Australia, R. Snowball, T. Albertsen, K. Gajda, D. Real, Ronald Yates, B. Cohen Feb 2021

Preliminary Evaluation Of Lespedeza Juncea Var. Sericea In South‐Western Australia, R. Snowball, T. Albertsen, K. Gajda, D. Real, Ronald Yates, B. Cohen

IGC Proceedings (1977-2023)

No abstract provided.


Methods For The Assessment Of Cell Wall Composition In Miscanthus And Other 'Energy Grasses', Mark P. Robbins, G. G. Allison, E. Hodgson, C. Morris, S. Gill, I. S. Donnison Feb 2021

Methods For The Assessment Of Cell Wall Composition In Miscanthus And Other 'Energy Grasses', Mark P. Robbins, G. G. Allison, E. Hodgson, C. Morris, S. Gill, I. S. Donnison

IGC Proceedings (1977-2023)

No abstract provided.


Geology And Fossils Of North Central Texas (Fort Worth To Mineral Wells): Texas Academy Of Science February 28 2021, R. Larell Nielson Feb 2021

Geology And Fossils Of North Central Texas (Fort Worth To Mineral Wells): Texas Academy Of Science February 28 2021, R. Larell Nielson

Faculty Publications

The 2021 Texas Academy of Science Geology field trip will be a virtual field trip that you may run at any time. It will have two parts;Part 1 consists of a video discussion of each stop( https://www.youtube.com/watch?v=EJKSgqtLvw0)and Part 2 consists of this field trip guidebook (for use when visiting each of the locations). The field trip will start at Holiday Park,near Benbrook,southwest of Fort Worth,Texas, and will end at the Mineral Wells Fossil Park, west of Minerals Wells, Texas. T


Investigating The Recent History Of A Changing Planet With Innovative Isotopic Techniques And New Geologic Archives, Ryan A. Venturelli Feb 2021

Investigating The Recent History Of A Changing Planet With Innovative Isotopic Techniques And New Geologic Archives, Ryan A. Venturelli

USF Tampa Graduate Theses and Dissertations

Globally averaged Earth surface temperatures indicate a 0.8°C warming since 1880. Though this warming is a result of anthropogenic influence that has exceeded natural forcings, a thorough understanding of Earth's climate system requires a knowledge of changes in global temperatures beyond the instrumental record. To achieve this, we must supplement the temporally limited observational record with proxy records of environmental conditions in the geologic past. Though the foundational questions underlying interrogations of the geologic past are seemingly simple (What happened? When?), the accuracy of their answers depend upon accessibility and availability of geologic materials as well as the capabilities of …


Genetic Analysis Of Selfed And Open Pollinated Progenies Of Stylosanthes Capitata, Rosangela M. S. Resende, M. D. V. Resende, Liana Jank, Lucimara Chiari, Cacilda B. Valle Feb 2021

Genetic Analysis Of Selfed And Open Pollinated Progenies Of Stylosanthes Capitata, Rosangela M. S. Resende, M. D. V. Resende, Liana Jank, Lucimara Chiari, Cacilda B. Valle

IGC Proceedings (1977-2023)

No abstract provided.


Establishment And Growth Of Tall Fescue (Festuca Arundinacea) Cultivars With Spring Sowing In Southern Australia, Zhongnan Nie, B. Clark Feb 2021

Establishment And Growth Of Tall Fescue (Festuca Arundinacea) Cultivars With Spring Sowing In Southern Australia, Zhongnan Nie, B. Clark

IGC Proceedings (1977-2023)

No abstract provided.