NAME HYDROMETEOROLOGICAL WORKING GROUP

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NAMEHYDROMETEOROLOGICALWORKINGGROUP

• Motivation and Coordinated Activities

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Connecting the Hydrologic Cycle Exploration of
Terrestrial Linkages

• Leverage on the body of scientific and human
  dimensions research currently proposed under NAME
  to
  
• Improve hydrometerological and hydroclimatic
  process knowledge and contribute to dynamic
  management of water resources in the NAM region.

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Hydroclimatic Linkages in NAME
Precipitation
Evaporation
Runoff
Control Structures
Deep Percolation
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Hydroclimatic Linkages in NAME
Precipitation
Intensity Frequency Duration Areal Coverage
Forcing
Evaporation
Soils Vegetation Dynamics Antecedent Moisture
Forcing
Runoff Timing Local v Large-Scale Controls
W.R.
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Previous Findings(Dettinger and Diaz, JHM 1(4),
289-310 Gochis et al., 2003, JHM, in press. )

• Latitudinal transition to a summer-dominated
  regime proceeding southward from Mogollon Rim.

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Previous Findings

• Climatological peak flows tend to lag peak
  precipitation by 1-2 months (Dett.Diaz, ibid.)
• Interannual streamflow values are linked to both
  ENSO (Magana,1999) and PDO (Brito-Castillo et
  al., Atmosfera, 2002) but there exists both
  constructive and destructive tendencies in
  correlation structure.
• Evidence via diagnostics and modeling results of
  possible feedbacks between soil moisture and snow
  cover and the strength of the North American
  Monsoon system (NAMS).

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Previous Findings

• Existence of a midsummer drought in parts of
  Mexico, peripheral to the core monsoon region
  of the SMO.
• Smaller scale basin responses dominated by
  precipitation structure short-duration
  (0.5-1.0hr) high-intensity (10-100mm/hr) storms.
  (Michaud et al. 2001)
• Butlikely that many catchment-scale studies
  remain to be translated from Spanish-speaking
  literature and CNA reports !

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Lingering Uncertainties

• How are seasonal and shorter term, higher-order
  precipitation characteristics related to
  streamflow?
• Given the uncertainty in precipitation
  observations, what confidence is there in
  existing estimations of runoff fractions? What
  fraction is recycled to the atmosphere?
• What influences do the meso-climates, terrain and
  vegetation of the SMO, the Mexican plateau and
  the coastal regions have on hydrological
  cycling/partitioning?

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Meso-climate aspects of the NAM
Precipitation
Intensity Frequency Duration Areal Coverage
Forcing
Evaporation
Soils Vegetation Dynamics Antecedent Moisture
Forcing
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Meso-climate aspects of the NAM
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Lingering Uncertainties

• How are seasonal and longer term, higher-order
  precipitation characteristics related to
  streamflow?
• Given the uncertainty in precipitation
  observations, what confidence is there in
  existing estimations of runoff fractions? What
  fraction is recycled to the atmosphere?
• What influences do the meso-climates, terrain and
  vegetation of the SMO, the Mexican plateau and
  the coastal regions have on hydrological
  cycling/partitioning?
• To what extent do soil moisture and snow
  anomalies affect the evolution of the North
  American Monsoon, and can such relationships (if
  any) be demonstrated using long-term derived soil
  moisture and snow data sets?

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Broad Goals of the NHWG

• Build relationships to Mexican and U.S. water
  resource managers and the NAME atmospheric
  research community for determination of critical
  information requirements necessary for dynamic
  water resources management.
• Inventory and document availability and quality
  of hydrographic and physiographic data over the
  NAM region.
• Identify critical processes and scales, which
  govern the generation of runoff, its movement
  over catchments, streamflow and moisture
  recycling to the atmosphere.
• Improve existing frameworks for hydrologic
  simulation, ultimately resulting in measured
  increases in predictability.

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Avenues for Opportunity.
Mexican Investigators International NAME
Research Comm.
Land Surface Forcing/Feedback Studies
Rainfall-Runoff Process Studies
Improved Process Understanding and Improved
Hydrologic Predictability
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Building NHWG Linkages

• International NAME
• Research Comm.
• intra-seasonal variability (MJO)
• remote forcing (SST)
• extreme event likelihood (T.S.s)

NHWG

• Mexican Investigators
• water user/manager informatics
• local practices/policies
• data retrieval and sharing
• technology transfer

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Hydrographic Data Archive
NAME NETWORK
MEXICAN NETWORK
Unified, Quality Controlled Dataset Standardized
Data Formats w/ Metadata
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Data Synthesis for Hydrological Modeling
Radiation Temperature Wind Precipitation Soil
Moisture
INITIALIZATION FORCING DATA
GIS FIELDS
Unified, Quality Controlled Dataset Standardized
Data Formats w/ Metadata
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Endgame Improve Existing Frameworks
in SimulationResulting in Increased
Predictability
Increased Process Knowledge
Standardized Data Archive for Simulation, Calibra
tion and Verification
Knowledge of Large- Scale Hydroclimatic Controls
Increased Awareness of Water User/Manager Needs
and Constraints
NHWG
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THE END . Thank You!