Changes in the Onset of Spring in the Western United States

Abstract Fluctuations in spring climate in the western United States over the last 4–5 decades are described by examining changes in the blooming of plants and the timing of snowmelt–runoff pulses. The two measures of spring's onset that are employed are the timing of first bloom of lilac and honeysuckle bushes from a long–term cooperative phenological network, and the timing of the first major pulse of snowmelt recorded from high–elevation streams. Both measures contain year–to–year fluctuations, with typical year–to–year fluctuations at a given site of one to three weeks. These fluctuations are spatially coherent, forming regional patterns that cover most of the west. Fluctuations in lilac first bloom dates are highly correlated to those of honeysuckle, and both are significantly correlated with those of the spring snowmelt pulse. Each of these measures, then, probably respond to a common mechanism. Various analyses indicate that anomalous temperature exerts the greatest influence upon both interannual ...

[1]  Mark D. Schwartz,et al.  Changes in North American spring , 2000 .

[2]  Winter‐to‐spring transition in Europe 48–54°N: From temperature control by advection to control by insolation , 2000 .

[3]  G. McCabe,et al.  Variability in Winter Mass Balance of Northern Hemisphere Glaciers and Relations with Atmospheric Circulation , 2000 .

[4]  Mark D. Schwartz,et al.  Young students, satellites aid understanding of climate-biosphere link , 2000 .

[5]  Cecilia M. Bitz,et al.  Interannual to decadal variability in climate and the glacier mass balance in Washington, Western Canada, and Alaska , 1999 .

[6]  Annette Menzel,et al.  Growing season extended in Europe , 1999, Nature.

[7]  North Pacific interdecadal oscillation seen as factor in ENSO-related North American climate anomalies , 1999 .

[8]  S. Running,et al.  Asymmetric climatic warming improves California vintages , 1999 .

[9]  B. Luckman,et al.  LANDSCAPE AND CLIMATE CHANGE IN THE CENTRAL CANADIAN ROCKIES DURING THE 20TH CENTURY , 1998 .

[10]  Edward G. Josberger,et al.  Climate Variations and Changes in Mass of Three Glaciers in Western North America , 1998 .

[11]  D. Cayan,et al.  Climate-Ocean Variability and Ecosystem Response in the Northeast Pacific , 1998, Science.

[12]  J. Wallace,et al.  A Pacific Interdecadal Climate Oscillation with Impacts on Salmon Production , 1997 .

[13]  C. Tucker,et al.  Increased plant growth in the northern high latitudes from 1981 to 1991 , 1997, Nature.

[14]  Daniel R. Cayan,et al.  Interannual Climate Variability and Snowpack in the Western United States , 1996 .

[15]  R. D. Moore,et al.  Spring snowpack anomaly patterns and winter climatic variability , 1996 .

[16]  Louis J. Bajuk,et al.  Interpretation of Interdecadal Trends in Northern Hemisphere Surface Air Temperature , 1996 .

[17]  R. Reynolds,et al.  Bulletin of the American Meteorological Society , 1996 .

[18]  Henry F. Diaz,et al.  The Quality Control of Long-Term Climatological Data Using Objective Data Analysis , 1995 .

[19]  Michael Ghil,et al.  Interannual and interdecadal variability in United States surface-air temperatures, 1910-87 , 1995 .

[20]  G. McCabe,et al.  Relations between Atmospheric Circulation and Mass Balance of South Cascade Glacier, Washington, U.S.A. , 1995 .

[21]  Dean Roemmich,et al.  Climatic Warming and the Decline of Zooplankton in the California Current , 1995, Science.

[22]  M. Dettinger,et al.  Large-Scale Atmospheric Forcing of Recent Trends toward Early Snowmelt Runoff in California , 1995 .

[23]  G. Stenchikov,et al.  Changes of Snow Cover, Temperature, and Radiative Heat Balance over the Northern Hemisphere , 1994 .

[24]  T. P. Barnett,et al.  Causes of Decadal Climate Variability over the North Pacific and North America , 1994, Science.

[25]  Daniel L Johnson,et al.  Flowering plant phenology and weather in Alberta, Canada , 1994 .

[26]  Mark D. Schwartz,et al.  Monitoring global change with phenology: The case of the spring green wave , 1994 .

[27]  James W. Hurrell,et al.  Decadal atmosphere-ocean variations in the Pacific , 1994 .

[28]  Nicholas E. Graham,et al.  The 1976-77 Climate Shift of the Pacific Ocean , 1994 .

[29]  Richard R. Heim,et al.  Recent Variations of Snow Cover and Snowfall in North America and Their Relation to Precipitation and Temperature Variations , 1993 .

[30]  Thomas B. McKee,et al.  Annual snowpack patterns across the Rockies: Long-term trends and associated 500-mb synoptic patterns , 1993 .

[31]  J. Caprio.  Flowering dates, potential evapotranspiration and water use efficiency of Syringa vulgaris L. at different elevations in the western United States of America , 1993 .

[32]  Daniel R. Cayan,et al.  Climatic Fluctuations and the Timing of West Coast Streamflow , 1992 .

[33]  Mark D. Schwartz,et al.  Phenology and Springtime Surface-Layer Change , 1992 .

[34]  J. M. Landwehr,et al.  Hydro-climatic data network (HCDN); a U.S. Geological Survey streamflow data set for the United States for the study of climate variations, 1874-1988 , 1992 .

[35]  David H. Peterson,et al.  1976 step in the Pacific climate: forty environmental changes between 1968-1975 and 1977-1984 , 1991 .

[36]  Kevin E. Trenberth,et al.  Recent Observed Interdecadal Climate Changes in the Northern Hemisphere , 1990 .

[37]  M. D. Schwartz,et al.  Spring phenology : nature's experiment to detect the effect of Green-up on surface maximum temperatures , 1990 .

[38]  D. Cayan,et al.  The Influence of North Pacific Atmospheric Circulation on Streamflow in the West , 2013 .

[39]  A. Barnston,et al.  Classification, seasonality and persistence of low-frequency atmospheric circulation patterns , 1987 .

[40]  Russ E. Davis,et al.  Predictability of Sea Surface Temperature and Sea Level Pressure Anomalies over the North Pacific Ocean , 1976 .

[41]  F. Caprio.  Pattern of plant development in the western United States. , 1966 .

[42]  G. Burroughs,et al.  THE ROTATION OF PRINCIPAL COMPONENTS , 1961 .

[43]  J. Caprio.  Phenology of Lilac Bloom in Montana. , 1957, Science.