---

Temperature and pressure were collected and average into one minute data bins, and can be retrieved from the following files:

Monday, 15 June, 1998    980615.tap        Temperature plot  Pressure plot
Tuesday, 16 June, 1998   980616.tap        Temperature plot   Pressure plot
Thursday, 18 June, 1998   980618.tap        Temperature plot   Pressure plot
Friday, 19 June, 1998            980619.tap        Temperature plot   Pressure plot

---

Ozonesondes were launched daily during the intensive periods.  These data can be found in the following files:

Monday, 15 June, 1998          BL980615.txt        plot
Tuesday, 16 June, 1998         BL980616.txt        plot
Thursday, 18 June, 1998       BL980618.txt     plot
Friday, 19 June, 1998            BL980619.txt     plot

---

Ground-based ozone measurements using the Microtops instrument, the Boulder Dobson, as well as the integral of the sonde measurements give estimates of the total overhead ozone column:

Monday, 15 June, 1998    OZ980615.txt       plot
Tuesday, 16 June            OZ980616.txt       plot
Wednesday, 17 June       OZ980617.txt    plot
Thursday, 18 June          OZ980618.txt    plot
Friday, 19 June               OZ980619.txt    plot

---

Aerosol optical depths from the Microtops instrument are available below.
Monday, 15 June            AOD61598.txt    plot
Tuesday, 16 June           AOD61698.txt    plot
Wednesday, 17 June      AOD61798.txt    plot
Thursday, 18 June          AOD61898.txt    plot
Friday, 19 June               AOD61998.txt    plot

---

Albedo measurements were made with an Eppley radiometer over the surrounding vegetation during an overcast period on 15 June, 1998:

downwelling     upwelling         albedo
1.615                 0.048                 0.030
1.675                 0.050                 0.030
1.675                 0.044                 0.026
1.675                 0.055                 0.033
1.675                 0.050                 0.030
1.655                 0.046                 0.028
                                 average=> 0.029
                                 std dev.=> 0.002

---

Light scattered clouds, direct sun 18 June 1998, 1200 hrs:

downwelling     upwelling     albedo
    6.986                 0.206             0.029
    6.966                 0.176             0.025
    6.966                 0.166             0.024
    7.066                 0.196             0.028
    7.066                 0.176             0.025
                                 average=> 0.026
                                 std dev.=> 0.002
 

---

The horizon at the Marshall site varies due to the presence of the mountains to the west and the Denver basin to the east.  The elevation of the horizon is summarized in the following figure and downloadable text file:  

horizon.txt         plot
 

---

The CMDL Aerosol group led by John Ogren is currently making in situ aerosol measurements at the Marshall site.  The data can be found at:

http://www.cmdl.noaa.gov/aerosol/net/bld/index.html

---

Return to IPMMI page