Karen R Ryberg, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 54
Monitoring and understanding changes in heat waves, cold waves, floods, and droughts in the United States: State of knowledge Monitoring and understanding changes in heat waves, cold waves, floods, and droughts in the United States: State of knowledge
Weather and climate extremes have been varying and changing on many different time scales. In recent decades, heat waves have generally become more frequent across the United States, while cold waves have been decreasing. While this is in keeping with expectations in a warming climate, it turns out that decadal variations in the number of U.S. heat and cold waves do not correlate well...
Authors
Thomas C. Peterson, Richard R. Heim, Robert M. Hirsch, Dale P. Kaiser, Harold Brooks, Noah S. Diffenbaugh, Randall M. Dole, Jason P. Giovannettone, Kristen Guirguis, Thomas R. Karl, Richard W. Katz, Kenneth E. Kunkel, Dennis P. Lettenmaier, Gregory J. McCabe, Christopher J. Paciorek, Karen R. Ryberg, BS Silva K Wolter, Siegfried Schubert, Viviane B. S. Silva, Brooke C. Stewart, Aldo V. Vecchia, Gabriele Villarini, Russell S. Vose, John Walsh, Michael Wehner, David Wolock, Klaus Wolter, Connie A. Woodhouse, Donald Wuebbles
seawaveQ: an R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables seawaveQ: an R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables
The seawaveQ R package fits a parametric regression model (seawaveQ) to pesticide concentration data from streamwater samples to assess variability and trends. The model incorporates the strong seasonality and high degree of censoring common in pesticide data and users can incorporate numerous ancillary variables, such as streamflow anomalies. The model is fitted to pesticide data using...
Authors
Karen R. Ryberg, Aldo V. Vecchia
waterData--An R package for retrieval, analysis, and anomaly calculation of daily hydrologic time series data, version 1.0 waterData--An R package for retrieval, analysis, and anomaly calculation of daily hydrologic time series data, version 1.0
Hydrologic time series data and associated anomalies (multiple components of the original time series representing variability at longer-term and shorter-term time scales) are useful for modeling trends in hydrologic variables, such as streamflow, and for modeling water-quality constituents. An R package, called waterData, has been developed for importing daily hydrologic time series...
Authors
Karen R. Ryberg, Aldo V. Vecchia
Has the magnitude of floods across the USA changed with global CO2 levels? Has the magnitude of floods across the USA changed with global CO2 levels?
Statistical relationships between annual floods at 200 long-term (85–127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into four large regions and stationary...
Authors
Robert M. Hirsch, Karen R. Ryberg
Has the magnitude of floods across the USA changed with global CO 2 levels? Has the magnitude of floods across the USA changed with global CO 2 levels?
Statistical relationships between annual floods at 200 long-term (85-127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into four large regions and stationary...
Authors
R.M. Hirsch, K.R. Ryberg
Trends in pesticide concentrations in urban streams in the United States, 1992-2008 Trends in pesticide concentrations in urban streams in the United States, 1992-2008
Pesticide concentration trends in streams dominated by urban land use were assessed using data from 27 urban streams sampled as part of the U.S. Geological Survey National Water-Quality Assessment Program. The sites were divided into four regions, Northeast, South, Midwest, and West, to examine possible regional patterns. Three partially overlapping 9-year periods (1992-2000, 1996-2004...
Authors
Karen R. Ryberg, Aldo V. Vecchia, Jeffrey D. Martin, Robert J. Gilliom
Science and Products
Filter Total Items: 54
Monitoring and understanding changes in heat waves, cold waves, floods, and droughts in the United States: State of knowledge Monitoring and understanding changes in heat waves, cold waves, floods, and droughts in the United States: State of knowledge
Weather and climate extremes have been varying and changing on many different time scales. In recent decades, heat waves have generally become more frequent across the United States, while cold waves have been decreasing. While this is in keeping with expectations in a warming climate, it turns out that decadal variations in the number of U.S. heat and cold waves do not correlate well...
Authors
Thomas C. Peterson, Richard R. Heim, Robert M. Hirsch, Dale P. Kaiser, Harold Brooks, Noah S. Diffenbaugh, Randall M. Dole, Jason P. Giovannettone, Kristen Guirguis, Thomas R. Karl, Richard W. Katz, Kenneth E. Kunkel, Dennis P. Lettenmaier, Gregory J. McCabe, Christopher J. Paciorek, Karen R. Ryberg, BS Silva K Wolter, Siegfried Schubert, Viviane B. S. Silva, Brooke C. Stewart, Aldo V. Vecchia, Gabriele Villarini, Russell S. Vose, John Walsh, Michael Wehner, David Wolock, Klaus Wolter, Connie A. Woodhouse, Donald Wuebbles
seawaveQ: an R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables seawaveQ: an R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables
The seawaveQ R package fits a parametric regression model (seawaveQ) to pesticide concentration data from streamwater samples to assess variability and trends. The model incorporates the strong seasonality and high degree of censoring common in pesticide data and users can incorporate numerous ancillary variables, such as streamflow anomalies. The model is fitted to pesticide data using...
Authors
Karen R. Ryberg, Aldo V. Vecchia
waterData--An R package for retrieval, analysis, and anomaly calculation of daily hydrologic time series data, version 1.0 waterData--An R package for retrieval, analysis, and anomaly calculation of daily hydrologic time series data, version 1.0
Hydrologic time series data and associated anomalies (multiple components of the original time series representing variability at longer-term and shorter-term time scales) are useful for modeling trends in hydrologic variables, such as streamflow, and for modeling water-quality constituents. An R package, called waterData, has been developed for importing daily hydrologic time series...
Authors
Karen R. Ryberg, Aldo V. Vecchia
Has the magnitude of floods across the USA changed with global CO2 levels? Has the magnitude of floods across the USA changed with global CO2 levels?
Statistical relationships between annual floods at 200 long-term (85–127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into four large regions and stationary...
Authors
Robert M. Hirsch, Karen R. Ryberg
Has the magnitude of floods across the USA changed with global CO 2 levels? Has the magnitude of floods across the USA changed with global CO 2 levels?
Statistical relationships between annual floods at 200 long-term (85-127 years of record) streamgauges in the coterminous United States and the global mean carbon dioxide concentration (GMCO2) record are explored. The streamgauge locations are limited to those with little or no regulation or urban development. The coterminous US is divided into four large regions and stationary...
Authors
R.M. Hirsch, K.R. Ryberg
Trends in pesticide concentrations in urban streams in the United States, 1992-2008 Trends in pesticide concentrations in urban streams in the United States, 1992-2008
Pesticide concentration trends in streams dominated by urban land use were assessed using data from 27 urban streams sampled as part of the U.S. Geological Survey National Water-Quality Assessment Program. The sites were divided into four regions, Northeast, South, Midwest, and West, to examine possible regional patterns. Three partially overlapping 9-year periods (1992-2000, 1996-2004...
Authors
Karen R. Ryberg, Aldo V. Vecchia, Jeffrey D. Martin, Robert J. Gilliom
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government