Gregory McCabe (Former Employee)
Science and Products
Filter Total Items: 85
Influences of the El Niño Southern Oscillation and the Pacific Decadal Oscillation on the timing of the North American spring
Detrended, modelled first leaf dates for 856 sites across North America for the period 1900–2008 are used to examine how the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) separately and together might influence the timing of spring. Although spring (mean March through April) ENSO and PDO signals are apparent in first leaf dates, the signals are not statistically sig
Authors
Gregory J. McCabe, Toby R. Ault, Benjamin I. Cook, Julio L. Betancourt, Mark D. Schwartz
Independent effects of temperature and precipitation on modeled runoff in the conterminous United States
A water‐balance model is used to simulate time series of water‐year runoff for 4 km × 4 km grid cells for the conterminous United States during the 1900–2008 period. Model outputs are used to examine the separate effects of precipitation and temperature on runoff variability. Overall, water‐year runoff has increased in the conterminous United States and precipitation has accounted for almost all o
Authors
Gregory J. McCabe, David M. Wolock
Century-scale variability in global annual runoff examined using a water balance model
A monthly water balance model (WB model) is used with CRUTS2.1 monthly temperature and precipitation data to generate time series of monthly runoff for all land areas of the globe for the period 1905 through 2002. Even though annual precipitation accounts for most of the temporal and spatial variability in annual runoff, increases in temperature have had an increasingly negative effect on annual r
Authors
G.J. McCabe, D. M. Wolock
Variability and trends in dry day frequency and dry event length in the southwestern United States
Daily precipitation from 22 National Weather Service first-order weather stations in the southwestern United States for water years 1951 through 2006 are used to examine variability and trends in the frequency of dry days and dry event length. Dry events with minimum thresholds of 10 and 20 consecutive days of precipitation with less than 2.54 mm are analyzed. For water years and cool seasons (Oct
Authors
Gregory J. McCabe, David R. Legates, Harry F. Lins
Long-term variability in Northern Hemisphere snow cover and associations with warmer winters
A monthly snow accumulation and melt model is used with gridded monthly temperature and precipitation data for the Northern Hemisphere to generate time series of March snow-covered area (SCA) for the period 1905 through 2002. The time series of estimated SCA for March is verified by comparison with previously published time series of SCA for the Northern Hemisphere. The time series of estimated No
Authors
G.J. McCabe, D. M. Wolock
Predicting regime shifts in flow of the Colorado River
The effects of continued global warming on water resources are a concern for water managers and stake holders. In the western United States, where the combined climatic demand and consumptive use of water is equal to or greater than the natural supply of water for some locations, there is growing concern regarding the sustainability of future water supplies. In addition to the adverse effects of w
Authors
Subhrendu Gangopadhyay, Gregory J. McCabe
Joint spatiotemporal variability of global sea surface temperatures and global Palmer drought severity index values
Dominant modes of individual and joint variability in global sea surface temperatures (SST) and global Palmer drought severity index (PDSI) values for the twentieth century are identified through a multivariate frequency domain singular value decomposition. This analysis indicates that a secular trend and variability related to the El Niño–Southern Oscillation (ENSO) are the dominant modes of vari
Authors
S. Apipattanavis, G.J. McCabe, B. Rajagopalan, S. Gangopadhyay
Reducing streamflow forecast uncertainty: Application and qualitative assessment of the upper klamath river Basin, Oregon
The accuracy of streamflow forecasts depends on the uncertainty associated with future weather and the accuracy of the hydrologic model that is used to produce the forecasts. We present a method for streamflow forecasting where hydrologic model parameters are selected based on the climate state. Parameter sets for a hydrologic model are conditioned on an atmospheric pressure index defined using me
Authors
L.E. Hay, G.J. McCabe, M.P. Clark, J. C. Risley
Recent declines in western U.S. snowpack in the context of twentieth-century climate variability
A monthly snow accumulation and melt model was used with monthly Precipitation-elevation Regressions on Independent Slopes Model (PRISM) temperature and precipitation data to generate time series of 1 April snow water equivalent (SWE) for 1900 through 2008 in the western United States. Averaged across the western United States, SWE generally was higher than long-term (1900–2008) average conditions
Authors
Gregory J. McCabe, David M. Wolock
Joint variability of global runoff and global sea surface temperatures
Global land surface runoff and sea surface temperatures (SST) are analyzed to identify the primary modes of variability of these hydroclimatic data for the period 1905-2002. A monthly water-balance model first is used with global monthly temperature and precipitation data to compute time series of annual gridded runoff for the analysis period. The annual runoff time series data are combined with g
Authors
G.J. McCabe, D. M. Wolock
Associations of multi-decadal sea-surface temperature variability with US drought
Recent research suggests a link between drought occurrence in the conterminous United States (US) and sea surface temperature (SST) variability in both the tropical Pacific and North Atlantic Oceans on decadal to multidecadal (D2M) time scales. Results show that the Atlantic Multidecadal Oscillation (AMO) is the most consistent indicator of D2M drought variability in the conterminous US during the
Authors
G.J. McCabe, J.L. Betancourt, S.T. Gray, M.A. Palecki, H.G. Hidalgo
A monthly water-balance model driven by a graphical user interface
This report describes a monthly water-balance model driven by a graphical user interface, referred to as the Thornthwaite monthly water-balance program. Computations of monthly water-balance components of the hydrologic cycle are made for a specified location. The program can be used as a research tool, an assessment tool, and a tool for classroom instruction.
Authors
Gregory J. McCabe, Steven L. Markstrom
Science and Products
- Publications
Filter Total Items: 85
Influences of the El Niño Southern Oscillation and the Pacific Decadal Oscillation on the timing of the North American spring
Detrended, modelled first leaf dates for 856 sites across North America for the period 1900–2008 are used to examine how the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) separately and together might influence the timing of spring. Although spring (mean March through April) ENSO and PDO signals are apparent in first leaf dates, the signals are not statistically sigAuthorsGregory J. McCabe, Toby R. Ault, Benjamin I. Cook, Julio L. Betancourt, Mark D. SchwartzIndependent effects of temperature and precipitation on modeled runoff in the conterminous United States
A water‐balance model is used to simulate time series of water‐year runoff for 4 km × 4 km grid cells for the conterminous United States during the 1900–2008 period. Model outputs are used to examine the separate effects of precipitation and temperature on runoff variability. Overall, water‐year runoff has increased in the conterminous United States and precipitation has accounted for almost all oAuthorsGregory J. McCabe, David M. WolockCentury-scale variability in global annual runoff examined using a water balance model
A monthly water balance model (WB model) is used with CRUTS2.1 monthly temperature and precipitation data to generate time series of monthly runoff for all land areas of the globe for the period 1905 through 2002. Even though annual precipitation accounts for most of the temporal and spatial variability in annual runoff, increases in temperature have had an increasingly negative effect on annual rAuthorsG.J. McCabe, D. M. WolockVariability and trends in dry day frequency and dry event length in the southwestern United States
Daily precipitation from 22 National Weather Service first-order weather stations in the southwestern United States for water years 1951 through 2006 are used to examine variability and trends in the frequency of dry days and dry event length. Dry events with minimum thresholds of 10 and 20 consecutive days of precipitation with less than 2.54 mm are analyzed. For water years and cool seasons (OctAuthorsGregory J. McCabe, David R. Legates, Harry F. LinsLong-term variability in Northern Hemisphere snow cover and associations with warmer winters
A monthly snow accumulation and melt model is used with gridded monthly temperature and precipitation data for the Northern Hemisphere to generate time series of March snow-covered area (SCA) for the period 1905 through 2002. The time series of estimated SCA for March is verified by comparison with previously published time series of SCA for the Northern Hemisphere. The time series of estimated NoAuthorsG.J. McCabe, D. M. WolockPredicting regime shifts in flow of the Colorado River
The effects of continued global warming on water resources are a concern for water managers and stake holders. In the western United States, where the combined climatic demand and consumptive use of water is equal to or greater than the natural supply of water for some locations, there is growing concern regarding the sustainability of future water supplies. In addition to the adverse effects of wAuthorsSubhrendu Gangopadhyay, Gregory J. McCabeJoint spatiotemporal variability of global sea surface temperatures and global Palmer drought severity index values
Dominant modes of individual and joint variability in global sea surface temperatures (SST) and global Palmer drought severity index (PDSI) values for the twentieth century are identified through a multivariate frequency domain singular value decomposition. This analysis indicates that a secular trend and variability related to the El Niño–Southern Oscillation (ENSO) are the dominant modes of variAuthorsS. Apipattanavis, G.J. McCabe, B. Rajagopalan, S. GangopadhyayReducing streamflow forecast uncertainty: Application and qualitative assessment of the upper klamath river Basin, Oregon
The accuracy of streamflow forecasts depends on the uncertainty associated with future weather and the accuracy of the hydrologic model that is used to produce the forecasts. We present a method for streamflow forecasting where hydrologic model parameters are selected based on the climate state. Parameter sets for a hydrologic model are conditioned on an atmospheric pressure index defined using meAuthorsL.E. Hay, G.J. McCabe, M.P. Clark, J. C. RisleyRecent declines in western U.S. snowpack in the context of twentieth-century climate variability
A monthly snow accumulation and melt model was used with monthly Precipitation-elevation Regressions on Independent Slopes Model (PRISM) temperature and precipitation data to generate time series of 1 April snow water equivalent (SWE) for 1900 through 2008 in the western United States. Averaged across the western United States, SWE generally was higher than long-term (1900–2008) average conditionsAuthorsGregory J. McCabe, David M. WolockJoint variability of global runoff and global sea surface temperatures
Global land surface runoff and sea surface temperatures (SST) are analyzed to identify the primary modes of variability of these hydroclimatic data for the period 1905-2002. A monthly water-balance model first is used with global monthly temperature and precipitation data to compute time series of annual gridded runoff for the analysis period. The annual runoff time series data are combined with gAuthorsG.J. McCabe, D. M. WolockAssociations of multi-decadal sea-surface temperature variability with US drought
Recent research suggests a link between drought occurrence in the conterminous United States (US) and sea surface temperature (SST) variability in both the tropical Pacific and North Atlantic Oceans on decadal to multidecadal (D2M) time scales. Results show that the Atlantic Multidecadal Oscillation (AMO) is the most consistent indicator of D2M drought variability in the conterminous US during theAuthorsG.J. McCabe, J.L. Betancourt, S.T. Gray, M.A. Palecki, H.G. HidalgoA monthly water-balance model driven by a graphical user interface
This report describes a monthly water-balance model driven by a graphical user interface, referred to as the Thornthwaite monthly water-balance program. Computations of monthly water-balance components of the hydrologic cycle are made for a specified location. The program can be used as a research tool, an assessment tool, and a tool for classroom instruction.AuthorsGregory J. McCabe, Steven L. Markstrom - Science
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