Matthew R. Siegfried [He/Him]
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Dustin M. Schroeder
Dustin M. Schroeder Assistant Professor of Geophysics Department of Geophysics, School of Earth, Energy, and Environmental Sciences 397 Panama Mall, Mitchell Building 361, Stanford University, Stanford, CA 94305 [email protected], 440.567.8343 EDUCATION 2014 Jackson School of Geosciences, University of Texas, Austin, TX Doctor of Philosophy (Ph.D.) in Geophysics 2007 Bucknell University, Lewisburg, PA Bachelor of Science in Electrical Engineering (B.S.E.E.), departmental honors, magna cum laude Bachelor of Arts (B.A.) in Physics, magna cum laude, minors in Mathematics and Philosophy PROFESSIONAL EXPERIENCE 2016 – present Assistant Professor of Geophysics, Stanford University 2017 – present Assistant Professor (by courtesy) of Electrical Engineering, Stanford University 2020 – present Center Fellow (by courtesy), Stanford Woods Institute for the Environment 2020 – present Faculty Affiliate, Stanford Institute for Human-Centered Artificial Intelligence 2021 – present Senior Member, Kavli Institute for Particle Astrophysics and Cosmology 2016 – 2020 Faculty Affiliate, Stanford Woods Institute for the Environment 2014 – 2016 Radar Systems Engineer, Jet Propulsion Laboratory, California Institute of Technology 2012 Graduate Researcher, Applied Physics Laboratory, Johns Hopkins University 2008 – 2014 Graduate Researcher, University of Texas Institute for Geophysics 2007 – 2008 Platform Hardware Engineer, Freescale Semiconductor SELECTED AWARDS 2021 Symposium Prize Paper Award, IEEE Geoscience and Remote Sensing Society 2020 Excellence in Teaching Award, Stanford School of Earth, Energy, and Environmental Sciences 2019 Senior Member, Institute of Electrical and Electronics Engineers 2018 CAREER Award, National Science Foundation 2018 LInC Fellow, Woods Institute, Stanford University 2016 Frederick E. Terman Fellow, Stanford University 2015 JPL Team Award, Europa Mission Instrument Proposal 2014 Best Graduate Student Paper, Jackson School of Geosciences 2014 National Science Olympiad Heart of Gold Award for Service to Science Education 2013 Best Ph.D. -
Geologic Map of the Frisco Quadrangle, Summit County, Colorado
Geologic Map of the Frisco Quadrangle, Summit County, Colorado By Karl S. Kellogg, Paul J. Bartos, and Cindy L. Williams Pamphlet to accompany MISCELLANEOUS FIELD STUDIES MAP MF-2340 2002 U.S. Department of the Interior U.S. Geological Survey Geologic Map of the Frisco Quadrangle, Summit County, Colorado By Karl S. Kellogg, Paul J. Bartos, and Cindy L. Williams DESCRIPTION OF MAP UNITS af Artificial fill (recent)—Compacted and uncompacted rock fragments and finer material underlying roadbed and embankments along and adjacent to Interstate 70. Also includes material comprising Dillon Dam dt Dredge tailings (recent)—Unconsolidated, clast-supported deposits containing mostly well- rounded to subrounded, cobble- to boulder-size clasts derived from dredging of alluvium for gold along the Blue and Swan Rivers; similar dredge tailings along Gold Run Gulch are too small to show on map. Dredge tailings were mapped from 1974 air photos; most tailings have now been redistributed and leveled for commercial development Qal Alluvium (Holocene)—Unconsolidated clast-supported deposits containing silt- to boulder-size, moderately sorted to well-sorted clasts in modern floodplains; includes overbank deposits. Clasts are as long as 1 m in Blue River channel; clasts are larger in some side-stream channels. Larger clasts are moderately rounded to well rounded. Includes some wetland deposits in and adjacent to beaver ponds along Ryan Gulch. Maximum thickness unknown, but greater than 10 m in Blue River channel Qw Wetland deposits (Holocene)—Dark-brown to black, organic-rich sediment underlying wetland areas, commonly containing standing water and dense willow stands. Maximum thickness estimated to be about 15 m Qav Avalanche deposits (Holocene)—Unsorted, unstratified hummocky deposits at the distal ends of avalanche-prone hillside in Sec. -
The High Deccan Duricrusts of India and Their Significance for the 'Laterite
The High Deccan duricrusts of India and their significance for the ‘laterite’ issue Cliff D Ollier1 and Hetu C Sheth2,∗ 1School of Earth and Geographical Sciences, The University of Western Australia, Nedlands, W.A. 6009, Australia. 2Department of Earth Sciences, Indian Institute of Technology (IIT) Bombay, Powai, Mumbai 400 076, India. ∗e-mail: [email protected] In the Deccan region of western India ferricrete duricrusts, usually described as laterites, cap some basalt summits east of the Western Ghats escarpment, basalts of the low-lying Konkan Plain to its west, as well as some sizeable isolated basalt plateaus rising from the Plain. The duricrusts are iron-cemented saprolite with vermiform hollows, but apart from that have little in common with the common descriptions of laterite. The classical laterite profile is not present. In particular there are no pisolitic concretions, no or minimal development of con- cretionary crust, and the pallid zone, commonly assumed to be typical of laterites, is absent. A relatively thin, non-indurated saprolite usually lies between the duricrust and fresh basalt. The duricrust resembles the classical laterite of Angadippuram in Kerala (southwestern India), but is much harder. The High Deccan duricrusts capping the basalt summits in the Western Ghats have been interpreted as residuals from a continuous (but now largely destroyed) laterite blan- ket that represents in situ transformation of the uppermost lavas, and thereby as marking the original top of the lava pile. But the unusual pattern of the duricrusts on the map and other evidence suggest instead that the duricrusts formed along a palaeoriver system, and are now in inverted relief. -
On the Glaciology of Edgegya and Barentsgya, Svalbard
On the glaciology of Edgegya and Barentsgya, Svalbard JULIAN A. DOWDESWELL and JONATHAN L. BAMBER Dowdeswell J. A. & Bamber. J. L. 1995: On the glaciology of Edgeoya and Barentsoya, Svalbard. Polar Research 14(2). 105-122. The ice masses on Edgeoya and Barentsdya are the least well known in Svalbard. The islands are 42-47% ice covered with the largest ice cap, Edge0yjokulen. 1365 km2 in area. The tidewater ice cliffs of eastern Edgedya are over 80 km long and produce small tabular icebergs. Several of the ice-cap outlet glaciers on Edgeoya and Barentsoya are known to surge, and different drainage basins within the ice caps behave as dynamically separate units. Terminus advances during surging have punctuated more general retreat from Little Ice Age moraines, probably linked to Twentieth Century climate warming and mass balance change. Airborne radio-echo sounding at 60 MHz along 340 km of flight track over the ice masses of Edgeoya and Barentsldya has provided ice thickness and elevation data. Ice is grounded below sea level to about 20 km inland from the tidewater terminus of Stonebreen. Ice thickens from <lo0 rn close to the margins, to about 250 m in the interior of Edgeeiyj~kulen.The maximum ice thickness measured on Barentsjokulen was 270111. Landsat MSS images of the two islands, calibrated to in-band reflectance values, allow synoptic examination of snowline position in late July/early August. Snow and bare glacier ice were identified. and images were digitally stretched and enhanced. The snowline was at about 300111 on the east side of Edgeoyjbkulen, and 50-100 m higher to the west. -
From Decades to Epochs: Spanning the Gap Between Geodesy and Structural Geology of Active Mountain Belts
Journal of Structural Geology 31 (2009) 1409–1422 Contents lists available at ScienceDirect Journal of Structural Geology journal homepage: www.elsevier.com/locate/jsg From decades to epochs: Spanning the gap between geodesy and structural geology of active mountain belts Richard W. Allmendinger a,*, John P. Loveless b, Matthew E. Pritchard a, Brendan Meade b a Department of Earth & Atmospheric Sciences Cornell University, Ithaca, NY 14853-1504, United States b Department of Earth & Planetary Sciences, Harvard University, Cambridge, MA, United States article info abstract Article history: Geodetic data from the Global Navigation Satellite System (GNSS), and from satellite interferometric Received 25 March 2009 radar (InSAR) are revolutionizing how we look at instantaneous tectonic deformation, but the signifi- Received in revised form cance for long-term finite strain in orogenic belts is less clear. We review two different ways of analyzing 31 July 2009 geodetic data: velocity gradient fields from which one can extract strain, dilatation, and rotation rate, and Accepted 9 August 2009 elastic block modeling, which assumes that deformation is not continuous but occurs primarily on Available online 14 August 2009 networks of interconnected faults separating quasi-rigid blocks. These methods are complementary: velocity gradients are purely kinematic and yield information about regional deformation; the calcula- Keywords: Geodesy tion does not take into account either faults or rigid blocks but, where GNSS data are dense enough, GPS active fault zones and stable blocks emerge naturally in the solution. Block modeling integrates known Active tectonics structural geometry with idealized earthquake cycle models to predict slip rates on active faults. Future technological advances should overcome many of today’s uncertainties and provide rich new data to mine by providing denser, more uniform, and temporally continuous observations. -
Ice News Bulletin of the International
ISSN 0019–1043 Ice News Bulletin of the International Glaciological Society Number 172 3rd Issue 2016 Contents 2 From the Editor 18 Presentation of Honorary Membership to 4 Blog: New Chief Editor for the Professor Keiji Higuchi International Glaciological Society 19 New office for the IGS 5 International Glaciological Society 20 Second Circular: International Symposium 5 Journal of Glaciology on Polar Ice, Polar Climate, Polar Change, 7 Creative Commons licensing Boulder, CO, USA, August 2017 8 Report on the IGS Symposium La Jolla, CA, 32 First Circular: International Symposium on July 2016 Cryosphere and Biosphere, Kyoto, Japan, 13 Report on the British Branch Meeting, March 2018 Southampton, September 2016 36 Glaciological diary 15 News 39 New members 15 Report from the Summer School, McCarthy, Alaska, June 2016 Cover picture: Glacier de Gébroulaz, Vanoise, France, August 2015. Measurements of flow velocity, thickness variation and mass balance are taken several times a year on this glacier by Glacioclim (Laboratoire de Glaciologie et Géophysique de l’Environnement, Grenoble, France). Photo by Coline Bouchayer. EXCLUSION CLAUSE. While care is taken to provide accurate accounts and information in this Newsletter, neither the editor nor the International Glaciological Society undertakes any liability for omissions or errors. 1 From the Editor Dear IGS member Welcome to the third and last issue of ICE breaks (as opposed to running across the for 2016. In this editorial I would like to street looking for a Starbucks and once discuss IGS symposia and in particular our there waiting in line for half an hour) so registration fees. We are regularly criticized this is an excellent opportunity to grab the for setting the registration fees too high and speakers from the previous session and told that people will be unable to attend discuss their presentations. -
Lesson 1: Mount Everest Lesson Plan
Lesson 1: Mount Everest Lesson Plan Use the Mount Everest PowerPoint presentation in conjunction with this lesson. The PowerPoint presentation contains photographs and images and follows the sequence of the lesson. If required, this lesson can be taught in two stages; the first covering the geography of Mount Everest and the second covering the successful 1953 ascent of Everest by Sir Edmund Hillary and Tenzing Norgay. Key questions Where is Mount Everest located? How high is Mount Everest? What is the landscape like? How do the features of the landscape change at higher altitude? What is the weather like? How does this change? What are conditions like for people climbing the mountain? Who were Edmund Hillary and Tenzing Norgay? How did they reach the summit of Mount Everest? What did they experience during their ascent? What did they do when they reached the summit? Subject content areas Locational knowledge: Pupils develop contextual knowledge of the location of globally significant places. Place knowledge: Communicate geographical information in a variety of ways, including writing at length. Interpret a range of geographical information. Physical geography: Describe and understand key aspects of physical geography, including mountains. Human geography: Describe and understand key aspects of human geography, including land use. Geographical skills and fieldwork: Use atlases, globes and digital/computer mapping to locate countries and describe features studied. Downloads Everest (PPT) Mount Everest factsheet for teachers -
Hydrology Specialist Report
Motorized Travel Plan Hydrology Specialist Report Hydrology Specialist Report Motorized Travel Plan Dixie National Forest Reeds Valley, Cedar City Ranger District Prepared by Bill Goodman, East Zone Hydrologist and Chris Butler, West Zone Hydrologist May 2008 Updated March 2009 1 March 2009 Motorized Travel Plan Hydrology Specialist Report Table of Contents 3.0 Affected Environment.............................................................................................................2 3.1 Existing Conditions ............................................................................................................2 4.0 Environmental Consequences ...............................................................................................9 4.1 Direct and Indirect Effects..................................................................................................9 4.2 Cumulative Effects ...........................................................................................................17 5.0 Project Design Criteria Common to All Action Alternatives..................................................22 6.0 Compliance with Other Laws and Regulations ....................................................................23 6.1 Clean Water Act...............................................................................................................23 6.2 Executive Order 11988 (Protection of Floodplains) of May 24, 1977...............................23 6.3 Executive Order 11990 (Protection of Wetlands) of May 24, 1977..................................23 -
E-Book on Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources
Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources Item Type Book Authors Bundtzen, Thomas K.; Nokleberg, Warren J.; Price, Raymond A.; Scholl, David W.; Stone, David B. Download date 03/10/2021 23:23:17 Link to Item http://hdl.handle.net/11122/7994 University of Alaska, U.S. Geological Survey, Pacific Rim Geological Consulting, Queens University REGIONAL EARTH SCIENCE FOR THE LAYPERSON THROUGH PROFESSIONAL LEVELS E-Book on Dynamic Geology of the Northern Cordillera (Alaska and Western Canada) and Adjacent Marine Areas: Tectonics, Hazards, and Resources The E-Book describes, explains, and illustrates the have been subducted and have disappeared under the nature, origin, and geological evolution of the amazing Northern Cordillera. mountain system that extends through the Northern In alphabetical order, the marine areas adjacent to the Cordillera (Alaska and Western Canada), and the Northern Cordillera are the Arctic Ocean, Beaufort Sea, intriguing geology of adjacent marine areas. Other Bering Sea, Chukchi Sea, Gulf of Alaska, and the Pacific objectives are to describe geological hazards (i.e., Ocean. volcanic and seismic hazards) and geological resources (i.e., mineral and fossil fuel resources), and to describe the scientific, economic, and social significance of the earth for this region. As an example, the figure on the last page illustrates earthquakes belts for this dangerous part of the globe. What is the Northern Cordillera? The Northern Cordillera is comprised of Alaska and Western Canada. Alaska contains a series of parallel mountain ranges, and intervening topographic basins and plateaus. From north to south, the major mountain ranges are the Brooks Range, Kuskokwim Mountains, Aleutian Range, Alaska Range, Wrangell Mountains, and the Chugach Mountains. -
Non-Gaussian Statistical Analysis of Polarimetric Synthetic Aperture Radar Images
FACULTY OF SCIENCE AND TECHNOLOGY DEPARTMENT OF PHYSICS AND TECHNOLOGY Non-Gaussian Statistical Analysis of Polarimetric Synthetic Aperture Radar Images Anthony Paul Doulgeris A dissertation for the degree of Philosophiae Doctor February 2011 Abstract This thesis describes general methods to analyse polarimetric synthetic aperture radar images. The primary application is for unsupervised image segmentation, and fast, practical methods are sought. The fundamental assumptions and statistical modelling are derived from the phys- ics of electromagnetic scattering from distributed targets. The physical basis directly leads to the image phenomenon called speckle, which is shown to be potentially non- Gaussian and several statistical distributions are investigated. Speckle non-Gaussianity and polarimetry both hold pertinent information about the target medium and methods that utilise both attributes are developed. Two distinct approaches are proposed: a local feature extraction method; and a model-based clustering algorithm. The local feature extraction approach creates a new six-dimensional description of the image that may be used for subsequent image analysis or for physical parameter extraction (inversion). It essentially extends standard polarimetric features with the addition of a non-Gaussianity measure for texture. Importantly, the non-Gaussianity measure is model independent and therefore does not unduly constrain the analysis. Unsupervised image segmentation is demonstrated with good results. The model-based approach describes a Bayesian clustering algorithm for the K- Wishart model, with fast moment based parameter estimation, and incorporates both non-Gaussianity and polarimetry. The initial implementation requires the number of classes, and initial segmentation, and the effective number of looks (an important model parameter) to be given in advance. -
Modeling Phosphorus Transport in the Blue River Watershed, Summit County, Colorado
Modeling Phosphorus Transport in the Blue River Watershed, Summit County, Colorado Paula Jo Lemonds and John E. McCray Abstract Introduction Lake Dillon in Summit County, Colorado, is a primary Numerical models are useful tools because they allow a drinking-water reservoir for Denver. Eutrophication of quantitative assessment of the environmental impacts Lake Dillon is a concern, primarily due to phosphorus of wastewater pollutants and improve understanding of (P) loading. There is little agriculture in the watershed. watershed-scale pollutant transport. Projecting future Thus, many local officials attribute the P loading to water quantity and quality is especially important in onsite wastewater systems (OWS). A watershed developing communities that rely on shallow modeling effort using the SWAT model is underway to groundwater as a source of drinking water while understand the potential influence of various point and disposing of wastewater in the shallow subsurface. nonpoint sources of P in the Blue River watershed (the Some models capable of simulating watershed-scale most developed of three watersheds that supply Lake pollutant transport include Soil and Water Assessment Dillon). The watershed model was calibrated to Tool (SWAT) (Arnold 1998), MIKESHE (Danish measured flow rates and P concentrations. The Hydraulic Institute 1999), Watershed Analysis Risk hydrologic model results are most sensitive to the Management Framework (WARMF) (Chen et al. 1999) physical parameters of snowmelt, and orographic and Hydrologic Simulation Program – Fortran (HSPF) effects on precipitation and evapotranspiration. (Bicknell et al. 1996). SWAT was used for this effort However, uncertainties in chemical-hydrologic because it is a public-domain model that can parameters preclude a rigorous assignment of relative incorporate large amounts of data and simulate many contributions of various P sources. -
Louisiana Topography
GEOGRAPHER'S SPACE by Richard Campanella TOP OF THE HILL Louisiana is the third lowest, third flattest state –and, topographically, among the most fascinating nless you live in the piney hills of northern Louisiana or the bowl is the Eastover neighborhood in eastern New Orleans, of which loess bluffs of West Feliciana Parish, the word “rugged” probably roughly half is 10 to 14 feet below sea level. Parts of Lakeview and Uarises rarely in your Louisiana lexicon. Likewise, it’s safe to say Gentilly are not much higher, at -6 to -8 feet, while certain canal beds that whoever coined the slogan “Sportsman’s Paradise” — in circulation throughout the metropolis are (when dry) 18 to 20 feet below sea since the 1860s and stenciled on state license plates since the late 1950s level. — was not referring to hiking or mountain climbing. Two hundred miles to the northwest, in rural Bienville Parish, lay Yet despite its subtlety, topographic elevation has been extraordinarily the quartz sands of the Cockfield Formation, a series of pine-covered consequential in Louisiana’s human geography because of its effects on hills peaking at Louisiana’s summit, 535-foot-high Mount Driskill. That soil fertility and habitability. More simply put, anything weak in supply high point measures one-tenth of a vertical mile above the state’s but strong in demand has great value. Our state is, after all, largely lowest point in eastern New Orleans. In contrast, elevational range of alluvial and deltaic in its physical geography, a product of sediment- California, whose apex (14,505-foot-high Mt.