|
Date
|
Model
Run
|
Change
|
|
|
|
| March 21, 2017 |
AK/HI 12 UTC |
|
| January 29, 2015 |
AK/HI 12 UTC |
- V4.6.5
CB05/AERO-4 CMAQ
- CB05: 51
species with 156 reactions,
(Sarwar et
al., 2013 and 2008).
- AERO-4: Represent
size distribution by log normal distributions of φ, geometric
diameter of the
particles: Aitken (φ <0.1 μm), accumulation (0.1<φ
<2.5μm) and coarse
(2.5<φ <10μm). New particle formation: gas conversion and
nucleation. (Binkowski
and Rosselle, 2003).
- Heterogeneous
hydrolysis reaction of N2O5 ( key linkage between gas and aerosol phase
reactions, includes temperature and humidity impact).
- ISORROPIA
V1.7 gas-particle partitioning: Partitioning
between inorganic gas and particulate species due to thermodynamic
equilibrium (v1.7 increased stability).
- NTR,
organic nitrate, biases high and influenced ozone production. It is now
photolyzed and removed quicker (Dickerson
et al., 2014) by shortening
NTR lifetime by a factor of 10.
- Update
NOx emissions with satellite data (Pan,
et al., 2014).
- Modulate
fugitive dust emission with a binary switch: whenever there is ice/snow
suppress emission.
- Layer
specific time step was added to speed up code.
- Deposition velocity calculation over trees
were adjusted as
VOCs and ozone were overpredicted
- Increased the minimum PBL to 50 m where high
pollutants were noted esp. over marine boundary layers
- Implemented a hybrid lateral boundary
condition where
GEOS-Chem 2006 climatological LBCs were used up to 7 km.
- Updated emissions using
2005 base year while extrapolating to current year by using:
- Updated CEM point source data to 2012.
- Updated
DOE projection factors to 2014.
|
| August 12, 2014 |
AK/HI 12 UTC |
|
| May 1, 2014 |
HI/AK 00 UTC |
|
| October 18, 2011 |
HI/AK 12 UTC |
- The North
American Model (NAM)
was upgraded to the National Environmental Modeling System (NEMS)
framework Non-hydrostatic Multi-scale Model (NMMB). The NAM
provides
hourly meteorological predictions at 12 km to drive CMAQ.
|
| June 1, 2011 |
HI/AK 00 UTC |
|
| May 25, 2010 |
HI/AK 12 UTC |
Implementation of NAM-CMAQ Hawaii NCO Experimental
Forecasts
- 48 hour forecasts at 06 and 12 UTC
- 6 hour cycling at 18 and 00 UTC
- 12 km CMAQ Lambert Conformal native horizontal grid
|
May
17,2010
|
Hawaii 18 UTC
|
- Correction to Aerosol Optical Thickness calculation
in POST3 codes. This
error created a memory leak that sometimes corrupted the AOT
calculation. This correction also impacts the Alaska Domain AOT
outputs.
- Daily Maximum Day 1 and Day 2 ozone GRIB2 NDGD files now
available
here
|
| March 23,
2010 |
Hawaii 12 UTC |
- 48 hour forecasts at 06 and 12 UTC
- 6 hour cycling at 18 and 00 UTC
- 12 km CMAQ V4.6 Lambert Conformal native horizontal
grid
- Domain size: 80x52x22, Lambert Secant Conformal projection,
- Corner points:
- The
CB05
chemical mechanism with more detailed
Volatile Organic Compound (VOC) chemistry was implemented.
- A
harmonized version of the AERO-4
aerosol chemistry mechanism was turned on. The harmonized
NOx night time chemistry is configured with heterogeneous pathways
turned off but
gas-phase N205 hydrolysis turned on. This was done to minimize
the impact of aerosol chemistry on the ozone forecast.
- Sea
salt emissions were included in CMAQ.
- Point, area and mobile
emissions were upgraded based upon recent EPA
National Emissions Inventory
(NEI, 2005) and
then projected for the
current year. Point EGU sources use 2007 CEM
data. These emissions are
also
consistent with the CB05 chemical mechanism. More
detailed Hawaii emission information is described by Daniel Tong, ARL, here.
- Lateral Boundary Conditions:
Running with climatologically averaged ozone from the Hilo ozonesonde
site with GEOS5-Chem global model climatological precurser species.
- Post-processing upgraded for efficiency. Now
using cmaq2grib codes. one and eight hour average ozone/PM
produced. Still awaiting daily maximum product generation.
|