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Team Members. Atmospheric Modeling Components. Sequential Simulations. Large-Scale Meteorology or Climate. Anthropogenic Emission Inventories. Land Use, Land Cover Data. “ Sequential ” – the models are run independently and there is only 1-way communication between models.

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sequential simulations
Sequential Simulations

Large-Scale Meteorology or Climate

Anthropogenic Emission Inventories

Land Use, Land Cover

Data

  • “Sequential” – the models are run independently and there is only 1-way communication between models

Gridded, Hourly Emissions from All Sources

Gridded, Hourly Meteorology

Gridded, Hourly BVOC Emissions

WRF-VIC

MEGAN

SMOKE

CMAQ

Gridded, Hourly Nitrogen Deposition

Chemical Boundary Conditions

RHEYSSys, CropSyst

coupled wrf vic simulation for sequential runs
Coupled WRF-VIC Simulation for Sequential Runs

Decisions Made!

  • Western-US domain:
    • Allows analysis of ENSO cycles
  • Grid Cells:
    • 12-km x 12-km
    • Decent for representing ubran vs rural influence on air quality
  • Historical Simulation Period:
    • 1979-2008, which has several ENSO periods; PDO variability too long to capture
  • Boundary and Initial Conditions:
    • NARR (~32-km resolution)
  • Land-Use, Land-Cover Data:
    • NLDAS2 (save Alex’s dataset for WRF-VIC-RHESSys-- no need to recalibrate VIC yet!)

Simulation Domain

offline cmaq simulation for sequential runs
Offline CMAQ Simulation for Sequential Runs
  • Purpose:
    • Model nitrogen deposition and evaluate how it’s modulated by ENSO cycles
    • Provide results to offline RHESSys and CropSyst simulations
  • Domain & Grid Cells:
    • A subdomain within the WRF-VIC domain
    • Same grid cells as WRF-VIC
  • Historical Simulation Period:
    • A few ENSO cycles during the 1979-2008 period
  • Chemical Boundary Conditions:
    • 1990s from global chemical transport model MOZART?
  • Anthropogenic Emission Inventory:
    • 1999 or 2002 National Emissions Inventory
  • Bioegenic Emissions:
    • MEGANv2.1
enso cycles during historical simulation period
ENSO Cycles During Historical Simulation Period

El Nino

La Nina

http://www.esrl.noaa.gov/psd/enso/mei/

status of coupled wrf vic
Status of Coupled WRF-VIC

GCM/Reanalysis

Flux Coupler

(CPL7)

Atmosphere

(WRF/Chem)

Ocean (ROMS)

RESM

Land/Veg/C/N

(CLM/VIC)

Ocean (POP)

Sea Ice (CSIM)

Atmosphere

(CAM)

CESM

  • WRF (v3.2) and VIC (v.4.0.4) has been coupled through the CESM flux coupler CPL7
  • Coupled WRF-VIC has been tested in a global and an Arctic domain (Chunmei Zhu, UW)
  • For BioEarth, need to create input data spatial data for VIC for our Western-US simulation & grid cells.
status of coupled wrf cmaq
Status of Coupled WRF-CMAQ

Aerosol Optical Properties,

Cloud Condensation Nuclei

Ozone

  • Current release, CMAQv4.7.1, is not coupled to WRF
  • CMAQv5.0 is supposed to be released anytime now.
    • Two-way coupling built into WRF v3.3
      • Only supports CAM and RRTMG shortwave radiation schemes
    • identical on-line and off-line computational paradigms with minimal code changes
    • flexibility in frequency of coupling

WRF

CMAQ

AQPREP

Prepares virtual CMAQ-compatible input meteorological files

coupled wrf cmaq domain setup
Coupled WRF-CMAQ Domain Setup

From Wong et al., CMAS 2011 Presentation

coupled wrf cmaq execution performance
Coupled WRF-CMAQ Execution Performance

From Wong et al., CMAS 2011 Presentation

coupled wrf cmaq test case
Coupled WRF-CMAQ Test Case

Aerosol-radiation feedbacks resulted in reduced shortwave radaition reaching the surface

Widespread wildfires resulted in high aerosol loading during mid/late June 2008 in California

From Wong et al., CMAS 2011 Presentation

status of megan recent improvements version 2 1
Status of MEGANRecent Improvements (version 2.1)
  • U.S. landcover
    • high resolution (30-m) PFT (CLM scheme) and species composition for crops, trees, shrubs, grass. Integrates CDL, NLCD, FIA, NRCS data with adjusted NLCD in urban areas.
    • LAI data: MODIS 8-day for individual years
  • Biogenic VOC
    • Updated emission factors, emission activity parameters
    • Response to increasing CO2
    • Additional compounds
  • Soil emissions
    • Biogenic VOC: soil moisture, litterfall, temperature
    • Nitric oxide: soil moisture, temperature and fertilizer

Crops

Urban

status of megan ongoing planned activities
Status of MEGANOngoing/Planned Activities
  • Integrating MEGAN into Bioearth
    • Coupling with VIC-RHESSys-CropSyst
    • Coupling with CESM/CLM (boundary conditions)
  • Improve soil nitrogen emissions (NO, NH3, N2O)
  • Add particles: pollen, fungal spores, bacteria, dust
  • Use MEGAN in BIOEARTH to identify scientific questions that can be addressed with a PNW regional field study
    • Landcover change (e.g. poplar plantations)
    • Interactions of biogenic emissions and anthropogenic pollution