Tables of water content, particle density, and refractive index as calculated from impactor measurements on Kaashidhoo.

Contact: Lara Hughes <lara@its.caltech.edu>

The data are calculated at various relative humidities; they're presented size-segregated and as a mass-weighted average of all particles below Da= 1.8µm. These numbers may be refined at some point in the future; in this calculation, particles were kept with the impactor stage corresponding to their dry diameters, but water uptake with increasing RH would change particle diameters and impaction collection properties. These data are probably reasonably good first estimates, though.

Density (g/cm3), KCO, Feb 11-26, 1999

Average and [range] over 8 46-h samples
 
 
 
RH
0.06-0.10
0.10-0.18
0.18-0.32
0.32-0.56
0.56-1.0
1.0-1.8
<1.8
20
1.238
1.76
1.892
1.894
1.938
1.854
1.911
[0.043 2.249]
[1.534 1.929]
[1.805 1.959]
[1.853 1.930]
[1.894 2.017]
[0.924 2.047]
[1.835 1.962]
30
1.225
1.73
1.858
1.859
1.897
1.812
1.872
[0.095 2.186]
[1.521 1.887]
[1.779 1.914]
[1.822 1.891]
[1.856 1.974]
[0.928 1.990]
[1.801 1.917]
40
1.212
1.702
1.823
1.825
1.858
1.77
1.834
[0.145 2.124]
[1.507 1.846]
[1.753 1.871]
[1.792 1.855]
[1.819 1.932]
[0.931 1.935]
[1.768 1.874]
50
1.173
1.614
1.719
1.721
1.741
1.651
1.721
[0.236 1.948]
[1.464 1.724]
[1.671 1.753]
[1.700 1.750]
[1.709 1.807]
[0.942 1.780]
[1.670 1.747]
60
1.153
1.569
1.665
1.665
1.68
1.59
1.662
[0.244 1.860]
[1.439 1.662]
[1.625 1.698]
[1.644 1.693]
[1.651 1.741]
[0.947 1.707]
[1.617 1.686]
70
1.112
1.478
1.556
1.556
1.561
1.477
1.548
[0.263 1.693]
[1.386 1.556]
[1.518 1.589]
[1.530 1.581]
[1.537 1.613]
[0.957 1.570]
[1.514 1.568]
80
1.055
1.346
1.399
1.398
1.395
1.327
1.387
[0.306 1.473]
[1.299 1.407]
[1.367 1.427]
[1.372 1.418]
[1.375 1.434]
[0.970 1.389]
[1.367 1.404]
90
1.007
1.231
1.264
1.263
1.257
1.208
1.252
[0.373 1.313]
[1.189 1.273]
[1.239 1.289]
[1.241 1.277]
[1.242 1.287]
[0.981 1.246]
[1.241 1.268]

 

Real Refractive Index, KCO, Feb 11-26, 1999

Average and [range] over 8 46-h samples
 
RH
0.06-0.10
0.10-0.18
0.18-0.32
0.32-0.56
0.56-1.0
1.0-1.8
<1.8
20
1.533
1.543
1.565
1.575
1.557
1.542
1.56
[1.512 1.553]
[1.526 1.566]
[1.545 1.587]
[1.556 1.596]
[1.543 1.579]
[1.537 1.554]
[1.548 1.580]
30
1.527
1.535
1.556
1.565
1.547
1.532
1.551
[1.502 1.552]
[1.516 1.560]
[1.535 1.579]
[1.546 1.586]
[1.534 1.570]
[1.526 1.544]
[1.539 1.571]
40
1.522
1.527
1.547
1.556
1.538
1.522
1.541
[1.492 1.551]
[1.506 1.554]
[1.525 1.571]
[1.536 1.577]
[1.525 1.560]
[1.515 1.534]
[1.529 1.562]
50
1.505
1.504
1.52
1.528
1.51
1.492
1.513
[1.465 1.547]
[1.477 1.535]
[1.497 1.546]
[1.508 1.548]
[1.498 1.532]
[1.485 1.506]
[1.501 1.534]
60
1.496
1.492
1.506
1.513
1.495
1.477
1.498
[1.452 1.545]
[1.463 1.524]
[1.482 1.532]
[1.493 1.533]
[1.484 1.516]
[1.469 1.491]
[1.486 1.519]
70
1.478
1.467
1.477
1.482
1.466
1.449
1.469
[1.427 1.539]
[1.437 1.501]
[1.454 1.503]
[1.464 1.501]
[1.456 1.486]
[1.441 1.462]
[1.457 1.488]
80
1.45
1.43
1.436
1.439
1.426
1.412
1.429
[1.395 1.527]
[1.402 1.462]
[1.416 1.459]
[1.424 1.455]
[1.418 1.442]
[1.405 1.423]
[1.419 1.445]
90
1.423
1.398
1.4
1.402
1.392
1.382
1.394
[1.371 1.508]
[1.376 1.424]
[1.385 1.418]
[1.391 1.414]
[1.387 1.404]
[1.377 1.390]
[1.387 1.407]

 
 
 

Imaginary Refractive Index, KCO, Feb 11-26, 1999

Average and [range] over 8 46-h samples
 
RH
0.06-0.10
0.10-0.18
0.18-0.32
0.32-0.56
0.56-1.0
1.0-1.8
20
-0.003
-0.029
-0.067
-0.084
-0.057
-0.029
-0.06
[-0.009 0.000]
[-0.056 -0.015]
[-0.096 -0.040]
[-0.114 -0.057]
[-0.089 -0.034]
[-0.043 -0.016]
[-0.088 -0.040]
30
-0.003
-0.028
-0.065
-0.081
-0.054
-0.027
-0.058
[-0.009 0.000]
[-0.054 -0.015]
[-0.092 -0.038]
[-0.110 -0.055]
[-0.086 -0.033]
[-0.041 -0.015]
[-0.085 -0.038]
40
-0.003
-0.027
-0.062
-0.077
-0.052
-0.026
-0.055
[-0.009 0.000]
[-0.053 -0.014]
[-0.089 -0.037]
[-0.106 -0.052]
[-0.083 -0.031]
[-0.039 -0.014]
[-0.082 -0.037]
50
-0.003
-0.024
-0.055
-0.068
-0.045
-0.022
-0.048
[-0.009 0.000]
[-0.048 -0.012]
[-0.080 -0.031]
[-0.093 -0.045]
[-0.072 -0.027]
[-0.034 -0.012]
[-0.072 -0.032]
60
-0.003
-0.022
-0.051
-0.063
-0.041
-0.02
-0.044
[-0.009 0.000]
[-0.046 -0.011]
[-0.075 -0.029]
[-0.087 -0.041]
[-0.067 -0.025]
[-0.031 -0.011]
[-0.067 -0.029]
70
-0.002
-0.019
-0.042
-0.052
-0.034
-0.016
-0.037
[-0.009 0.000]
[-0.040 -0.009]
[-0.065 -0.023]
[-0.073 -0.034]
[-0.056 -0.020]
[-0.025 -0.009]
[-0.056 -0.024]
80
-0.002
-0.014
-0.031
-0.038
-0.024
-0.011
-0.026
[-0.008 0.000]
[-0.031 -0.006]
[-0.048 -0.016]
[-0.053 -0.024]
[-0.040 -0.014]
[-0.018 -0.006]
[-0.041 -0.017]
90
-0.002
-0.01
-0.02
-0.025
-0.016
-0.007
-0.017
[-0.007 0.000]
[-0.022 -0.004]
[-0.033 -0.010]
[-0.036 -0.015]
[-0.027 -0.009]
[-0.012 -0.004]
[-0.027 -0.011]

 
 
 

Water Content (µg/m3), KCO, Feb 11-26, 1999

Average and [range] over 8 46-h samples
 
RH
0.06-0.10
0.10-0.18
0.18-0.32
0.32-0.56
0.56-1.0
1.0-1.8
<1.8
20
0.002
0.005
0.025
0.084
0.116
0.062
0.086
[0.001 0.003]
[0.003 0.008]
[0.014 0.034]
[0.037 0.111]
[0.043 0.175]
[0.046 0.093]
[0.038 0.125]
30
0.004
0.012
0.058
0.198
0.272
0.147
0.203
[0.001 0.007]
[0.007 0.018]
[0.033 0.080]
[0.088 0.262]
[0.101 0.411]
[0.108 0.219]
[0.089 0.293]
40
0.006
0.02
0.095
0.32
0.441
0.239
0.329
[0.002 0.011]
[0.012 0.029]
[0.054 0.130]
[0.143 0.425]
[0.163 0.666]
[0.176 0.355]
[0.145 0.475]
50
0.014
0.047
0.226
0.76
1.047
0.568
0.782
[0.005 0.026]
[0.028 0.070]
[0.127 0.308]
[0.339 1.008]
[0.388 1.583]
[0.417 0.843]
[0.344 1.128]
60
0.019
0.064
0.312
1.05
1.446
0.784
1.081
[0.008 0.035]
[0.039 0.097]
[0.176 0.426]
[0.468 1.393]
[0.536 2.187]
[0.576 1.164]
[0.476 1.559]
70
0.032
0.11
0.532
1.793
2.468
1.339
1.845
[0.013 0.060]
[0.067 0.165]
[0.300 0.727]
[0.799 2.378]
[0.915 3.732]
[0.984 1.987]
[0.812 2.660]
80
0.065
0.219
1.064
3.585
4.936
2.677
3.69
[0.026 0.120]
[0.134 0.329]
[0.599 1.454]
[1.597 4.756]
[1.829 7.464]
[1.967 3.974]
[1.623 5.320]
90
0.123
0.419
2.031
6.842
9.421
5.109
7.042
[0.049 0.230]
[0.256 0.629]
[1.144 2.775]
[3.048 9.076]
[3.491 14.246]
[3.755 7.583]
[3.099 10.154]