Michael D Pace (Former Employee)
Science and Products
Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021
Airborne geophysical surveys were acquired in March 2018 and May 25 through August 7, 2021 using a helicopter-based platform. These surveys were collected along 10,706 line-kilometers (line-km) within selected areas of the Mississippi Alluvial Plain (MAP) and the Chicot Aquifer System in the southeastern United States. The airborne geophysical surveys include electromagnetic, magnetic...
Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, Mississippi Embayment, and Gulf Coastal Plain, September 2021 - January 2022
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired September 2021 to January 2022 along 27,204 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP), Mississippi Embayment, and Gulf Coastal Plain. Data were acquired by Xcalibur Multiphysics (Canada), Ltd. with three different airborne sensors: the 30Hz TEMPEST time-domain AEM instrument that is...
Magnetotelluric data from Minnesota, Wisconsin, and Upper Michigan, 2015-2019
This dataset consists of 176 wideband magnetotelluric (MT) stations collected from 2015-2019 across parts of Minnesota, Wisconsin and the Upper Peninsula of Michigan. The U.S. Geological Survey (USGS) acquired these data as part of regional investigations into the geologic and tectonic framework of the area and to support mineral resource investigations. These data have been used to...
Magnetotelluric data from Missouri, Arkansas, Tennessee, Illinois, and Kentucky, 2016-2019
This dataset consists of 127 wideband and 21 long-period magnetotelluric (MT) stations collected from 2016-2019 across parts of Missouri, Arkansas, Tennessee, Illinois, and Kentucky. The U.S. Geological Survey acquired these data as part of regional investigations into the geologic and tectonic framework of the area and to support mineral resource and geologic hazard investigations...
Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2019 - March 2020
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2019 to March 2020 along 24,030 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). Data were acquired by CGG Canada Services, Ltd. with three different airborne sensors: the CGG Canada Services, Ltd. TEMPEST time-domain AEM instrument that is used to map subsurface geologic structure...
Ground-based electromagnetic survey, Alamosa, Colorado, March 2020
Shallow soil conductivity was mapped in the San Luis Valley, Colorado, using the DualEM421 electromagnetic sensor in March 2020. Data were acquired by towing the DualEM421 sensor on a wheeled cart behind an all-terrain vehicle, with the sensor at a height of 0.457 m above the ground surface. Approximately 62 line-kilometers of data were acquired over an area of nearly 1.5 square...
Ground-based electromagnetic survey, Shellmound, Mississippi, October 2018
Shallow soil characteristics were mapped near Shellmound, Mississippi, using the DualEM 421 electromagnetic sensor in October 2018. Data were acquired by towing the DualEM sensor on a wheeled cart behind an all-terrain vehicle (ATV), with the sensor at a height of 0.432 meters (m) above the ground surface. Approximately 175 line-kilometers of data were acquired over an area of nearly...
Ground-based time-domain electromagnetic data and resistivity models for the Mississippi Alluvial Plain Project
The Mississippi Alluvial Plain (MAP) Project contains several geologic units which act as important aquifers. We collected several sets of time-domain electromagnetic (TEM) data consisting of two higher-density surveys and six regional-scale transects. The higher density surveys were collected to compare and contrast to other geophysical data not included in this data release, such as...
Mapping critical minerals from the sky
Critical mineral resources titanium, zirconium, and rare earth elements occur in placer deposits over vast parts of the U.S. Atlantic Coastal Plain. Key questions regarding provenance, pathways of minerals to deposit sites, and relations to geologic features remain unexplained. As part of a national effort to collect data over regions prospective for critical minerals, the first public...
Authors
Anjana K. Shah, Robert Morrow, Michael Pace, M.Scott Harris, William Doar III
Airborne geophysical surveys of the lower Mississippi Valley demonstrate system-scale mapping of subsurface architecture
The Mississippi Alluvial Plain hosts one of the most prolific shallow aquifer systems in the United States but is experiencing chronic groundwater decline. The Reelfoot rift and New Madrid seismic zone underlie the region and represent an important and poorly understood seismic hazard. Despite its societal and economic importance, the shallow subsurface architecture has not been mapped...
Authors
Burke J. Minsley, James R. Rigby, Stephanie R. James, Bethany L. Burton, Katherine J. Knierim, Michael Pace, Paul A. Bedrosian, Wade H. Kress
LAGOS-NE: a multi-scaled geospatial and temporal database of lake ecological context and water quality for thousands of US lakes
Understanding the factors that affect water quality and the ecological services provided by freshwater ecosystems is an urgent global environmental issue. Predicting how water quality will respond to global changes not only requires water quality data, but also information about the ecological context of individual water bodies across broad spatial extents. Because lake water quality is...
Authors
Patricia A. Soranno, Linda C. Bacon, Michael Beauchene, Karen E. Bednar, Edward G. Bissell, Claire K. Boudreau, Marvin G. Boyer, Mary Tate Bremigan, Stephen R. Carpenter, Jamie W. Carr, Kendra Spence Cheruvelil, Samuel T. Christel, Matt Claucherty, Sarah M. Collins, Joseph D. Conroy, John A. Downing, James E Dukett, C. Emi Fergus, Christopher T. Filstrup, Clara Funk, Maria J. Gonzalez, Linda T. Green, Corinna Gries, John D. Halfman, Stephen K. Hamilton, Paul R. Hanson, Emily N. Henry, Elizabeth M. Herron, Celeste Hockings, James V. Jackson, Kari Jacobson-Hedin, Lorraine L. Janus, William R. Jones, John Jones, Caroline M. Keson, Katelyn B.S. King, Scott A. Kishbaugh, Jean-Francois Lapierre, Barbara Lathrop, Jo A. Latimore, Yuehlin Lee, Noah R. Lottig, Jason A. Lynch, Leslie J. Matthews, William H. McDowell, Karen E.B. Moore, Brian Neff, Sarah J. Nelson, Samantha K. Oliver, Michael Pace, Donald C. Pierson, Autumn C. Poisson, Amina Pollard, David M. Post, Paul O. Reyes, Donald Rosenberry, Karen M. Roy, Lars G. Rudstam, Orlando Sarnelle, Nancy J. Schuldt, Caren E. Scott, Nicholas K. Skaff, Nicole J. Smith, Nick R. Spinelli, Joseph J. Stachelek, Emily H. Stanley, John L. Stoddard, Scott B. Stopyak, Craig Stow Stow, Jason M. Tallant, Pang-Ning Tan, Anthony P. Thorpe, Michael J. Vanni, Tyler Wagner, Gretchen Watkins, Kathleen C. Weathers, Katherine E. Webster, Jeffrey R. White, Marcy K. Wilmes, Shuai Yuan
Spatial early warning signals in a lake manipulation
Rapid changes in state have been documented for many of Earth's ecosystems. Despite a growing toolbox of methods for detecting declining resilience or early warning indicators (EWIs) of ecosystem transitions, these methods have rarely been evaluated in whole-ecosystem trials using reference ecosystems. In this study, we experimentally tested EWIs of cyanobacteria blooms based on changes...
Authors
Vince L. Butitta, Stephen R. Carpenter, Luke C. Loken, Michael Pace, Emily H. Stanley
Do Daphnia use metalimnetic organic matter in a north temperate lake? An analysis of vertical migration
Diel vertical migration of zooplankton is influenced by a variety of factors including predation, food, and temperature. Research has recently shifted from a focus on factors influencing migration to how migration affects nutrient cycling and habitat coupling. Here we evaluate the potential for Daphnia migrations to incorporate metalimnetic productivity in a well-studied northern...
Authors
Chase Julian Brosseau, Timothy Joseph Cline, Jonathan J. Cole, James R. Hodgson, Michael Pace, Brian Weidel
Ecological science and sustainability for the 21st century
Ecological science has contributed greatly to our understanding of the natural world and the impact of humans on that world. Now, we need to refocus the discipline towards research that ensures a future in which natural systems and the humans they include coexist on a more sustainable planet. Acknowledging that managed ecosystems and intensive exploitation of resources define our future...
Authors
Margaret V. Palmer, Emily. S Bernhardt, Elizabeth Chornesky, Scott M. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Alan R. Townsend, Monica L. Turner
Ecology for a crowded planet
Within the next 50 to 100 years, the support and maintenance of an extended human family of 8 to 11 billion people will be difficult at best. The authors of this Policy Forum describe changes that are required if we hope to meet the needs and aspirations of humans while improving the health of our planet's ecosystems. Problems as diverse as disease transmission and global climate change...
Authors
Margaret V. Palmer, Emily. S Bernhardt, Elizabeth Chornesky, Scott M. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Ashley Simons, Alan R. Townsend, Monica L. Turner
Science and Products
Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021
Airborne geophysical surveys were acquired in March 2018 and May 25 through August 7, 2021 using a helicopter-based platform. These surveys were collected along 10,706 line-kilometers (line-km) within selected areas of the Mississippi Alluvial Plain (MAP) and the Chicot Aquifer System in the southeastern United States. The airborne geophysical surveys include electromagnetic, magnetic...
Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, Mississippi Embayment, and Gulf Coastal Plain, September 2021 - January 2022
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired September 2021 to January 2022 along 27,204 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP), Mississippi Embayment, and Gulf Coastal Plain. Data were acquired by Xcalibur Multiphysics (Canada), Ltd. with three different airborne sensors: the 30Hz TEMPEST time-domain AEM instrument that is...
Magnetotelluric data from Minnesota, Wisconsin, and Upper Michigan, 2015-2019
This dataset consists of 176 wideband magnetotelluric (MT) stations collected from 2015-2019 across parts of Minnesota, Wisconsin and the Upper Peninsula of Michigan. The U.S. Geological Survey (USGS) acquired these data as part of regional investigations into the geologic and tectonic framework of the area and to support mineral resource investigations. These data have been used to...
Magnetotelluric data from Missouri, Arkansas, Tennessee, Illinois, and Kentucky, 2016-2019
This dataset consists of 127 wideband and 21 long-period magnetotelluric (MT) stations collected from 2016-2019 across parts of Missouri, Arkansas, Tennessee, Illinois, and Kentucky. The U.S. Geological Survey acquired these data as part of regional investigations into the geologic and tectonic framework of the area and to support mineral resource and geologic hazard investigations...
Airborne electromagnetic, magnetic, and radiometric survey of the Mississippi Alluvial Plain, November 2019 - March 2020
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2019 to March 2020 along 24,030 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). Data were acquired by CGG Canada Services, Ltd. with three different airborne sensors: the CGG Canada Services, Ltd. TEMPEST time-domain AEM instrument that is used to map subsurface geologic structure...
Ground-based electromagnetic survey, Alamosa, Colorado, March 2020
Shallow soil conductivity was mapped in the San Luis Valley, Colorado, using the DualEM421 electromagnetic sensor in March 2020. Data were acquired by towing the DualEM421 sensor on a wheeled cart behind an all-terrain vehicle, with the sensor at a height of 0.457 m above the ground surface. Approximately 62 line-kilometers of data were acquired over an area of nearly 1.5 square...
Ground-based electromagnetic survey, Shellmound, Mississippi, October 2018
Shallow soil characteristics were mapped near Shellmound, Mississippi, using the DualEM 421 electromagnetic sensor in October 2018. Data were acquired by towing the DualEM sensor on a wheeled cart behind an all-terrain vehicle (ATV), with the sensor at a height of 0.432 meters (m) above the ground surface. Approximately 175 line-kilometers of data were acquired over an area of nearly...
Ground-based time-domain electromagnetic data and resistivity models for the Mississippi Alluvial Plain Project
The Mississippi Alluvial Plain (MAP) Project contains several geologic units which act as important aquifers. We collected several sets of time-domain electromagnetic (TEM) data consisting of two higher-density surveys and six regional-scale transects. The higher density surveys were collected to compare and contrast to other geophysical data not included in this data release, such as...
Mapping critical minerals from the sky
Critical mineral resources titanium, zirconium, and rare earth elements occur in placer deposits over vast parts of the U.S. Atlantic Coastal Plain. Key questions regarding provenance, pathways of minerals to deposit sites, and relations to geologic features remain unexplained. As part of a national effort to collect data over regions prospective for critical minerals, the first public...
Authors
Anjana K. Shah, Robert Morrow, Michael Pace, M.Scott Harris, William Doar III
Airborne geophysical surveys of the lower Mississippi Valley demonstrate system-scale mapping of subsurface architecture
The Mississippi Alluvial Plain hosts one of the most prolific shallow aquifer systems in the United States but is experiencing chronic groundwater decline. The Reelfoot rift and New Madrid seismic zone underlie the region and represent an important and poorly understood seismic hazard. Despite its societal and economic importance, the shallow subsurface architecture has not been mapped...
Authors
Burke J. Minsley, James R. Rigby, Stephanie R. James, Bethany L. Burton, Katherine J. Knierim, Michael Pace, Paul A. Bedrosian, Wade H. Kress
LAGOS-NE: a multi-scaled geospatial and temporal database of lake ecological context and water quality for thousands of US lakes
Understanding the factors that affect water quality and the ecological services provided by freshwater ecosystems is an urgent global environmental issue. Predicting how water quality will respond to global changes not only requires water quality data, but also information about the ecological context of individual water bodies across broad spatial extents. Because lake water quality is...
Authors
Patricia A. Soranno, Linda C. Bacon, Michael Beauchene, Karen E. Bednar, Edward G. Bissell, Claire K. Boudreau, Marvin G. Boyer, Mary Tate Bremigan, Stephen R. Carpenter, Jamie W. Carr, Kendra Spence Cheruvelil, Samuel T. Christel, Matt Claucherty, Sarah M. Collins, Joseph D. Conroy, John A. Downing, James E Dukett, C. Emi Fergus, Christopher T. Filstrup, Clara Funk, Maria J. Gonzalez, Linda T. Green, Corinna Gries, John D. Halfman, Stephen K. Hamilton, Paul R. Hanson, Emily N. Henry, Elizabeth M. Herron, Celeste Hockings, James V. Jackson, Kari Jacobson-Hedin, Lorraine L. Janus, William R. Jones, John Jones, Caroline M. Keson, Katelyn B.S. King, Scott A. Kishbaugh, Jean-Francois Lapierre, Barbara Lathrop, Jo A. Latimore, Yuehlin Lee, Noah R. Lottig, Jason A. Lynch, Leslie J. Matthews, William H. McDowell, Karen E.B. Moore, Brian Neff, Sarah J. Nelson, Samantha K. Oliver, Michael Pace, Donald C. Pierson, Autumn C. Poisson, Amina Pollard, David M. Post, Paul O. Reyes, Donald Rosenberry, Karen M. Roy, Lars G. Rudstam, Orlando Sarnelle, Nancy J. Schuldt, Caren E. Scott, Nicholas K. Skaff, Nicole J. Smith, Nick R. Spinelli, Joseph J. Stachelek, Emily H. Stanley, John L. Stoddard, Scott B. Stopyak, Craig Stow Stow, Jason M. Tallant, Pang-Ning Tan, Anthony P. Thorpe, Michael J. Vanni, Tyler Wagner, Gretchen Watkins, Kathleen C. Weathers, Katherine E. Webster, Jeffrey R. White, Marcy K. Wilmes, Shuai Yuan
Spatial early warning signals in a lake manipulation
Rapid changes in state have been documented for many of Earth's ecosystems. Despite a growing toolbox of methods for detecting declining resilience or early warning indicators (EWIs) of ecosystem transitions, these methods have rarely been evaluated in whole-ecosystem trials using reference ecosystems. In this study, we experimentally tested EWIs of cyanobacteria blooms based on changes...
Authors
Vince L. Butitta, Stephen R. Carpenter, Luke C. Loken, Michael Pace, Emily H. Stanley
Do Daphnia use metalimnetic organic matter in a north temperate lake? An analysis of vertical migration
Diel vertical migration of zooplankton is influenced by a variety of factors including predation, food, and temperature. Research has recently shifted from a focus on factors influencing migration to how migration affects nutrient cycling and habitat coupling. Here we evaluate the potential for Daphnia migrations to incorporate metalimnetic productivity in a well-studied northern...
Authors
Chase Julian Brosseau, Timothy Joseph Cline, Jonathan J. Cole, James R. Hodgson, Michael Pace, Brian Weidel
Ecological science and sustainability for the 21st century
Ecological science has contributed greatly to our understanding of the natural world and the impact of humans on that world. Now, we need to refocus the discipline towards research that ensures a future in which natural systems and the humans they include coexist on a more sustainable planet. Acknowledging that managed ecosystems and intensive exploitation of resources define our future...
Authors
Margaret V. Palmer, Emily. S Bernhardt, Elizabeth Chornesky, Scott M. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Alan R. Townsend, Monica L. Turner
Ecology for a crowded planet
Within the next 50 to 100 years, the support and maintenance of an extended human family of 8 to 11 billion people will be difficult at best. The authors of this Policy Forum describe changes that are required if we hope to meet the needs and aspirations of humans while improving the health of our planet's ecosystems. Problems as diverse as disease transmission and global climate change...
Authors
Margaret V. Palmer, Emily. S Bernhardt, Elizabeth Chornesky, Scott M. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Ashley Simons, Alan R. Townsend, Monica L. Turner