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Land Aerosol Models

 

Aerosol Models

 Model description

The aerosol models are used in the C6 over land algorithm are described in Table 1.

Model

Mode

rv (μm)

σ

V0 (μm3/μm2)

Refractive Index: k

ω0 / g

(0.47/0.55/0.65/2.1μm) for τ0.55 = 0.5

Continental

 

 

 

 

 

0.90/0.89/0.88/0.67

0.64/0.63/0.63/0.79

 

Soluble

0.176

1.09

3.05

1.53-0.005i; 0.47 μm

1.53-0.006i; 0.55 μm

1.53-0.006i; 0.65 μm

1.42-0.01i; 2.12 μm

 

 

Dust

17.6

1.09

7.364

1.53-0.008i; 0.47 μm

1.53-0.008i; 0.55 μm

1.53-0.008i; 0.65 μm

1.22-0.009i; 2.12 μm

 

 

Soot

0.050

0.693

0.105

1.75-0.45i; 0.47 μm

1.75-0.44i; 0.55 μm

1.75-0.43i; 0.65 μm

1.81-0.50i; 2.12 μm

 

Moderately absorbing /

Developing

 

 

 

 

 

0.93/0.92/0.91/0.87

0.68/0.65/0.61/0.68

 

Accum

0.0203τ + 0.145

0.1365τ + 0.3738

0.1642 τ0.7747

1.43 - (-0.002τ+0.008)i

 

 

Coarse

0.3364τ + 3.101

0.098τ + 0.7292

0.1482 τ0.6846

1.43 - (-0.002τ+0.008)i

 

Non-absorb/

Urban-Ind

 

 

 

 

 

0.95/0.95/0.94/0.90

0.71/0.68/0.65/0.64

 

Accum

0.0434τ + 0.1604

0.1529τ + 0.3642

0.1718 τ0.8213

1.42 - (-0.0015τ+0.007)i

 

 

Coarse

0.1411τ + 3.3252

0.1638τ + 0.7595

0.0934 τ0.6394

1.42 - (-0.0015τ+0.007)i

 

Absorbing/

Heavy Smoke

 

 

 

 

 

0.88/0.87/0.85/0.70

0.64/0.60/0.56/0.64

 

Accum

0.0096τ + 0.1335

0.0794τ + 0.3834

0.1748 τ0.8914

1.51 – 0.02i

 

 

Coarse

0.9489τ + 3.4479

0.0409τ + 0.7433

0.1043 τ0.6824

1.51 – 0.02i

 

Spheroid/

Dust

 

 

 

 

 

0.94/0.95/0.96/0.98

0.71/0.70/0.69/0.71

 

Accum

0.1416 τ -0.0519

0.7561 τ 0.148

0.0871 τ1.026

1.48τ—0.021 – (0.0025 τ0.132)i; 0.47 μm

1.48τ—0.021 – 0.002i; 0.55 μm

1.48τ—0.021 – (0.0018 τ-0.08)i; 0.65 μm

1.46τ—0.040 – (0.0018 τ-0.30)i; 2.12 μm

 

 

Coarse

2.2

0.554 τ -0.0519

0.6786 τ1.0569

1.48τ—0.021 – (0.0025 τ0.132)i; 0.47 μm

1.48τ—0.021 – 0.002i; 0.55 μm

1.48τ—0.021 – (0.0018 τ-0.08)i; 0.65 μm

1.46τ—0.040 – (0.0018 τ-0.30)i; 2.12 μm

 

 

 

 

 

 

 

 

 

Model assignment

The land algorithm does not have the flexibility to choose between fine aerosol models, the fine model is prescribed as a function of location and season according to the following map, from Levy et al. (2013). Location in green are assigned the non-absorbing (ω~0.95) model, and locations in red are assigned the highly absorbing (ω~0.85) model. The moderately absorbing (ω~0.90) is assumed everywhere else.