PMIP4 HadGEM2-A dust data

The simulation of the pre-industrial and LGM climate states with HadGEM2-A are described in more detail by Hopcroft & Valdes (2015), whilst the dust results are described by Hopcroft et al (2015). The dust scheme itself has been documented by Woodward (2011). HadGEM2-ES is documented by Collins et al (2011).

• files names = PMIP4_DUST_Hopcroft_<field>_<expt>.nc
  • field = see Variables section below
  • expt = PI or LGM

• The dust size bin edges are: 0.0316, 0.1, 0.316, 1.0, 3.16, 10.0 and 31.6 μm.
• AOD is given on 6 wavelengths. These are 0.38, 0.44, 0.55, 0.67, 0.87 and 1.02 μm (Bellouin et al 2007).

• emis: emission (lon,lat,size,month) [g/m2/a]
• ddep: dry deposition (lon,lat,size,month) [g/m2/a]
• wdep: wet deposition (lon,lat,size,month) [g/m2/a]
• load: dust loading (lon,lat,size,month) [kg/m2]
• aot: aerosol optical thickness (lon,lat,wavelength,month) [unitless]
• rfss: surface short-wave radiative forcing (lon,lat,month) [W/m2]
• rfsl: surface long-wave radiative forcing (lon,lat,month) [W/m2]
• rfts: TOA short-wave radiative forcing (lon,lat,month) [W/m2]
• rftl: TOA long-wave radiative forcing (lon,lat,month) [W/m2]

• conc: mass mixing ratio (lon,lat,lev,month) [kg/kg] x 6 bins

• Bellouin, N et al., (2007), Improved representation of aerosols for HadGEM2, Hadley Centre Technical Note 73, Met Office Hadley Centre, Exeter, UK:
• Collins, WJ et al (2011), Development and evaluation of an Earth-System model – HadGEM2, Geoscientific Model Development, 4, 1051-1075, doi:10.5194/gmd-4-1051-2011.
• Hopcroft, P.O. and P.J. Valdes (2014), Last Glacial Maximum constraints on the Earth System Model HadGEM2-ES, Climate Dynamics, 45(5), 1657-1672, doi:10.1007/s00382-014-2421-0.
• Hopcroft, P.O., P.J. Valdes, S. Woodward and M. Joshi (2015), Last glacial maximum radiative forcing from mineral dust aerosols in an Earth System model, J Geophysical Research, 120(16), 8186-8205, doi:10.1002/2015JD023742.
• Woodward, S. (2011), Mineral dust in HadGEM2, Hadley Centre Technical Note 87, Met Office Hadley Centre, Exeter, UK.