Relative Contributions of Synoptic and Low-Frequency Eddies to Time-Mean Atmospheric Moisture Transport, Including the Role of Atmospheric Rivers

AbstractThe relative contributions to mean global atmospheric moisture transport by both the time-mean circulation and by synoptic and low-frequency (periods greater than 10 days) anomalies are evaluated from the vertically integrated atmospheric moisture budget based on 40 yr of “chi corrected” NCEP–NCAR reanalysis data. In the extratropics, while the time-mean circulation primarily moves moisture zonally within ocean basins, low-frequency and synoptic anomalies drive much of the mean moisture transport both from ocean to land and toward the poles. In particular, during the cool-season low-frequency variability is the largest contributor to mean moisture transport into southwestern North America, Europe, and Australia. While some low-frequency transport originates in low latitudes, much is of extratropical origin due to large-scale atmospheric anomalies that extract moisture from the northeast Pacific and Atlantic Oceans. Low-frequency variability is also integral to the Arctic (latitudes > 70°N) mean mo...

[1]  K. Swanson,et al.  Storm Track Dynamics , 2002, The Global Circulation of the Atmosphere.

[2]  K. Trenberth,et al.  Estimates of the Global Water Budget and Its Annual Cycle Using Observational and Model Data , 2007 .

[3]  Sensitivity of large-scale atmospheric analyses to humidity observations and its impact on the global water cycle and tropical and extratropical weather systems in ERA40 , 2004 .

[4]  Heini Wernli,et al.  A 15-Year Climatology of Warm Conveyor Belts , 2004 .

[5]  A. Betts,et al.  Basin‐scale surface water and energy budgets for the Mississippi from the ECMWF reanalysis , 1999 .

[6]  P. Sardeshmukh.  The baroclinic χ problem and its application to the diagnosis of atmospheric heating rates , 1993 .

[7]  T. Shaw,et al.  Tropical and Subtropical Meridional Latent Heat Transports by Disturbances to the Zonal Mean and Their Role in the General Circulation , 2012 .

[8]  A. Stohl,et al.  A Lagrangian Analysis of the Atmospheric Branch of the Global Water Cycle. Part II: Moisture Transports between Earth's Ocean Basins and River Catchments , 2005 .

[9]  K. Trenberth,et al.  The large‐scale energy budget of the Arctic , 2007 .

[10]  P. Sardeshmukh,et al.  Barotropic Rossby Wave Dynamics of Zonally Varying Upper-Level Flows during Northern Winter , 1995 .

[11]  Yong Zhu,et al.  A Proposed Algorithm for Moisture Fluxes from Atmospheric Rivers , 1998 .

[12]  Stephen G. Yeager,et al.  The global climatology of an interannually varying air–sea flux data set , 2009 .

[13]  Kevin E. Trenberth,et al.  Evaluation of the Global Atmospheric Moisture Budget as Seen from Analyses , 1995 .

[14]  Kevin E. Trenberth,et al.  Climate Diagnostics from Global Analyses: Conservation of Mass in ECMWF Analyses , 1991 .

[15]  M. Newman,et al.  An Assessment of the NCEP, NASA, and ECMWF Reanalyses over the Tropical West Pacific Warm Pool , 2000 .

[16]  James D. Scott,et al.  Surface Flux Variability over the North Pacific and North Atlantic Oceans , 1997 .

[17]  An Assessment of Low-Frequency Variability in the Tropics as Indicated by Some Proxies of Tropical Convection , 1993 .

[18]  P. Dirmeyer,et al.  Characterization of the Global Hydrologic Cycle from a Back-Trajectory Analysis of Atmospheric Water Vapor , 2007 .

[19]  K. Trenberth.  Changes in precipitation with climate change , 2011 .

[20]  A. Betts,et al.  NCEP-NCAR and ECMWF Reanalysis Surface Water and Energy Budgets for the Mississippi River Basin , 2000 .

[21]  Muyin Wang.  Impact of Analysis Uncertainty upon Regional Atmospheric Moisture Flux Budgets: Diagnostic Study and Model Simulation , 1996 .

[22]  R. Pierrehumbert.  The hydrologic cycle in deep-time climate problems , 2002, Nature.

[23]  K. Mo,et al.  Atmospheric Moisture Transport over the United States and Mexico as Evaluated in the NCEP Regional Reanalysis , 2005 .

[24]  B. Hoskins,et al.  Aspects of a Northern Hemisphere Atmospheric Blocking Climatology , 2008 .

[25]  R. Pierrehumbert.  Lateral mixing as a source of subtropical water vapor , 1998 .

[26]  Ming-Jen Yang,et al.  The Coastal Observation and Simulation with Topography (COAST) Experiment , 1997 .

[27]  Daniel R. Cayan,et al.  Latent and Sensible Heat Flux Anomalies over the Northern Oceans: The Connection to Monthly Atmospheric Circulation , 1992 .

[28]  K. Mo,et al.  The moisture budget of the central United States in spring as evaluated in the NCEP/NCAR and the NASA/DAO reanalyses , 1996 .

[29]  P. Arkin,et al.  Precipitation and sea-surface salinity in the tropical Pacific Ocean , 1996 .

[30]  M. Newman,et al.  Stratiform Precipitation, Vertical Heating Profiles, and the Madden Julian Oscillation , 2004 .

[31]  Prashant D. Sardeshmukh,et al.  Spatial Smoothing on the Sphere , 1984 .

[32]  Karen L. Smith,et al.  A Climatology of Tropospheric Zonal-Mean Water Vapor Fields and Fluxes in Isentropic Coordinates , 2006 .

[33]  M. Newman,et al.  Tropical and Stratospheric Influences on Extratropical Short-Term Climate Variability , 2007 .

[34]  B. Soden,et al.  Robust Responses of the Hydrological Cycle to Global Warming , 2006 .

[35]  Kevin E. Trenberth,et al.  Evaluation of the atmospheric moisture and hydrological cycle in the NCEP/NCAR reanalyses , 1998 .

[36]  J. Lenters,et al.  Surface water balance of the continental United States, 1963–1995: Regional evaluation of a terrestrial biosphere model and the NCEP/NCAR reanalysis , 2000 .

[37]  F. Martin Ralph,et al.  Dropsonde Observations in Low-Level Jets over the Northeastern Pacific Ocean from CALJET-1998 and PACJET-2001: Mean Vertical-Profile and Atmospheric-River Characteristics , 2005 .

[38]  Andreas Stohl,et al.  On the origin of continental precipitation , 2010 .

[39]  S. Esbensen,et al.  Determination of Bulk Properties of Tropical Cloud Clusters from Large-Scale Heat and Moisture Budgets , 1973 .

[40]  L. Gimeno,et al.  On the contribution of the Tropical Western Hemisphere Warm Pool source of moisture to the Northern Hemisphere precipitation through a Lagrangian approach , 2011 .

[41]  John R. Lanzante,et al.  The Atmospheric Bridge: The Influence of ENSO Teleconnections on Air-Sea Interaction over the Global Oceans , 2002 .

[42]  F. Martin Ralph,et al.  A Multiscale Observational Case Study of a Pacific Atmospheric River Exhibiting Tropical–Extratropical Connections and a Mesoscale Frontal Wave , 2011 .

[43]  J. Roads,et al.  Large-Scale Aspects of the United States Hydrologic Cycle , 1994 .

[44]  A. Stohl,et al.  Remote sources of water vapor forming precipitation on the Norwegian west coast at 60°N–a tale of hurricanes and an atmospheric river , 2008 .

[45]  S. Schubert,et al.  Climatology of the Simulated Great Plains Low-Level Jet and Its Contribution to the Continental Moisture Budget of the United States , 1995 .

[46]  Christopher R. Winkler,et al.  A Linear Model of Wintertime Low-Frequency Variability. Part I: Formulation and Forecast Skill , 2001 .

[47]  Richard H. Johnson,et al.  Rainfall and Radiative Heating Rates from TOGA COARE Atmospheric Budgets , 2000 .

[48]  F. Martin Ralph,et al.  Meteorological Characteristics and Overland Precipitation Impacts of Atmospheric Rivers Affecting the West Coast of North America Based on Eight Years of SSM/I Satellite Observations , 2008 .

[49]  J. Wallace,et al.  An Observational Study of the Northern Hemisphere Wintertime Circulation , 1977 .

[50]  G. Wick,et al.  Satellite and CALJET Aircraft Observations of Atmospheric Rivers over the Eastern North Pacific Ocean during the Winter of 1997/98 , 2004 .

[51]  T. Schneider,et al.  The Hydrological Cycle over a Wide Range of Climates Simulated with an Idealized GCM , 2008 .

[52]  M. Dettinger,et al.  Flooding on California's Russian River: Role of atmospheric rivers , 2006 .

[53]  K. Mo,et al.  Influence of the Great Plains Low-Level Jet on Summertime Precipitation and Moisture Transport over the Central United States , 1997 .

[54]  Michael P. Meredith,et al.  The large‐scale freshwater cycle of the Arctic , 2006 .

[55]  Elfatih A. B. Eltahir,et al.  Hydroclimatology of Illinois: A comparison of monthly evaporation estimates based on atmospheric water balance and soil water balance , 1998 .

[56]  G. Compo,et al.  Oceanic influences on recent continental warming , 2007 .

[57]  T. Shaw,et al.  A Statistical Generalization of the Transformed Eulerian-Mean Circulation for an Arbitrary Vertical Coordinate System , 2011 .

[58]  K. Mo,et al.  Large-Scale Atmospheric Moisture Transport as Evaluated in the NCEP/NCAR and the NASA/DAO Reanalyses , 1996 .

[59]  M. Kanamitsu,et al.  CSE Water and Energy Budgets in the NCEP–DOE Reanalysis II , 2002 .

[60]  Jeffrey S. Whitaker,et al.  A Linear Theory of Extratropical Synoptic Eddy Statistics , 1998 .

[61]  R. Huang,et al.  Real Freshwater Flux as a Natural Boundary Condition for the Salinity Balance and Thermohaline Circulation Forced by Evaporation and Precipitation , 1993 .

[62]  J. Wallace,et al.  Barotropic Wave Propagation and Instability, and Atmospheric Teleconnection Patterns. , 1983 .

[63]  H. Loon.  The Half-Yearly Oscillations in Middle and High Southern Latitudes and the Coreless Winter , 1967 .

[64]  Tao Zhang,et al.  Was there a basis for anticipating the 2010 Russian heat wave? , 2011 .

[65]  R. Caballero,et al.  The dynamic range of poleward energy transport in an atmospheric general circulation model , 2005 .

[66]  T. Schneider,et al.  WATER VAPOR AND THE DYNAMICS OF CLIMATE CHANGES , 2009, 0908.4410.

[67]  Kevin E. Trenberth,et al.  Atmospheric Moisture Transports from Ocean to Land and Global Energy Flows in Reanalyses , 2011 .

[68]  W. Gutowski,et al.  Atmospheric Water Vapor Transport in NCEP–NCAR Reanalyses: Comparison with River Discharge in the Central United States , 1997 .

[69]  M. Newman,et al.  How Important Is Air–Sea Coupling in ENSO and MJO Evolution? , 2009 .

[70]  Ying-Hwa Kuo,et al.  Diagnosis of an Intense Atmospheric River Impacting the Pacific Northwest: Storm Summary and Offshore Vertical Structure Observed with COSMIC Satellite Retrievals , 2008 .

[71]  H. Wernli,et al.  A Lagrangian Climatology of Tropical Moisture Exports to the Northern Hemispheric Extratropics , 2009 .

[72]  J. Bao,et al.  Interpretation of Enhanced Integrated Water Vapor Bands Associated with Extratropical Cyclones: Their Formation and Connection to Tropical Moisture , 2006 .

[73]  S. Schubert,et al.  Office Note Series on Global Modeling and Data Assimilation , 1997 .

[74]  B. Anderson,et al.  Central Pacific El Niño and decadal climate change in the North Pacific Ocean , 2010 .