The importance of warm season warming to western U.S. streamflow changes

  title={The importance of warm season warming to western U.S. streamflow changes},
  author={Tapash Kumar Das and David W. Pierce and Daniel R. Cayan and Julie A. Vano and Dennis P. Lettenmaier},
  journal={Geophysical Research Letters},
Warm season climate warming will be a key driver of annual streamflow changes in four major river basins of the western U.S., as shown by hydrological model simulations using fixed precipitation and idealized seasonal temperature changes based on climate projections with SRES A2 forcing. Warm season (April‐September) warming reduces streamflow throughout the year; streamflow declines both immediately and in the subsequent cool season. Cool season (October‐March) warming, by contrast, increases… 

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The response of annual runoff volume to sub‐annual climate warming is highly uncertain, and the governing mechanisms remain poorly understood, challenging adaptive water management. A typical

Asymmetry of Western U.S. River Basin Sensitivity to Seasonally Varying Climate Warming

Future climate warming over the Western U.S. (WUS) is projected to be greater in summer than winter. Previous model‐based studies of large river basins in the WUS showed much different annual

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Given its large population, vigorous and water‐intensive agricultural industry, and important ecological resources, the western United States presents a valuable case study for examining potential

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The subseasonal features of the annual trends of runoff and other associated hydroclimatic variables in the upper Colorado River basin (UCRB) are examined using multiple data sets from in situ

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Increased temperatures and changes in precipitation will result in fundamental changes in the seasonal distribution of streamflow in the Pacific Northwest and will have serious implications for water

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Streamflow sensitivity to climate change is an important indicator for evaluating the effects of climate change on terrestrial water. This study analyzed the spatial pattern and seasonality of

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Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity

It is shown that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons.

Simulated Hydrologic Responses to Climate Variations and Change in the Merced, Carson, and American River Basins, Sierra Nevada, California, 1900–2099

Hydrologic responses of river basins in the Sierra Nevada of California to historical and future climate variations and changes are assessed by simulating daily streamflow and water-balance responses

Potential increase in floods in California’s Sierra Nevada under future climate projections

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Emissions pathways, climate change, and impacts on California.

  • K. HayhoeD. Cayan J. Verville
  • Environmental Science
    Proceedings of the National Academy of Sciences of the United States of America
  • 2004
It is found that annual temperature increases nearly double from the lower B1 to the higher A1fi emissions scenario before 2100, and three of four simulations also show greater increases in summer temperatures as compared with winter.

Atmospheric Moisture Residence Times and Cycling: Implications for Rainfall Rates and Climate Change

New estimates of the moistening of the atmosphere through evaporation at the surface and of the drying through precipitation are computed. Overall, the e-folding residence time of atmospheric

Sustainable water deliveries from the Colorado River in a changing climate

With either climate-change or long-term mean flows, currently scheduled future water deliveries from the Colorado River are not sustainable, however, the ability of the system to mitigate droughts can be maintained if the various users of the river find a way to reduce average deliveries.

Estimating the Influence of Evaporation and Moisture-Flux Convergence upon Seasonal Precipitation Rates. Part II: An Analysis for North America Based upon the NCEP–DOE Reanalysis II Model

Abstract In this paper, a diagnostic metric—termed the local-convergence ratio—is used to analyze the contribution of evaporation and atmospheric moisture-flux convergence to model-based estimates of