OSU Personnel: Andy Kowalski(andyk@ats.orst.edu) and Peter Anthoni(panthoni@oce.orst.edu).
ASTER Project Scientist: Tony Delany.
ASTER Project Engineer: Steve Semmer.
ASTER Personnel: Tom Horst, Kurt Knudson, Gordon Maclean, Charlie Martin, John Militzer, Santiago Newbery, Steve Oncley, Lou Verstraete(louvers@atd.ucar.edu).
Location of CACHE94 Field Site.
The ASTER facility was deployed at the Cheeka Peak cloud observatory, on the north-west extremity of the Olympic peninsula of Washington (See Figures 1 and 2).
Under many synoptic conditions this mountain-top site receives clean oceanic air advecting from the open Pacific ocean. Other conditions lead to off shore winds resulting in exposure to continental air and, on occasion, to polluted air from the Seattle urban area. Lower level air flow from the Seattle area along the Straits of Juan Fuca sometimes results in polluted air flowing out to sea and then returning on the westerly air flow.
The slopes are forested with a mixture of coniferous trees and evergreen shrubs. A transect was made by Lee Klinger of the Atmospheric Chemistry Division of NCAR from the ridge-top upwind and down the slope to the west. Figure 4 illustrates the height and leaf area distribution along the transect to the west. These data are tabulated in Table 1.
Silver Fir | Western Hemlock | Red Cedar | Salal | |||||
Distance | Height | Leaf Area | Height | Leaf Area | Height | Leaf Area | Height | Leaf Area |
m | m | m^2m^-2 | m | m^2m^-2 | m | m^2m^-2 | m | m^2m^-2 |
10 | 4.60 | 5.00 | 5.00 | 1.10 | 0.00 | 0.00 | 1 | 2.99 |
20 | 5.94 | 18.00 | 4.00 | 3.02 | 0.00 | 0.00 | 1 | 3.31 |
30 | 7.21 | 13.38 | 6.30 | 1.15 | 0.00 | 0.00 | 1 | 5.59 |
40 | 6.63 | 7.99 | 8.00 | 2.02 | 0.00 | 0.00 | 1 | 6.97 |
50 | 8.40 | 16.13 | 5.70 | 8.62 | 0.00 | 0.00 | 1 | 0.71 |
60 | 5.77 | 12.37 | 4.50 | 0.59 | 0.00 | 0.00 | 1 | 7.71 |
70 | 5.70 | 6.84 | 6.70 | 1.95 | 0.00 | 0.00 | 1 | 7.60 |
80 | 5.90 | 5.62 | 6.20 | 6.64 | 6.30 | 2.66 | 1 | 5.26 |
90 | 7.40 | 17.87 | 7.10 | 10.69 | 4.00 | 0.63 | 1 | 0.78 |
100 | 9.74 | 21.31 | 10.00 | 5.62 | 0.00 | 0.00 | 1 | 1.79 |
Setup and checkout from 25 July until 8 August 1994.
Operational period 8 August - 23 September 1994; julian days 214 - 266
Tear-down commenced 24 September 1994.
Operations | Julian Day | day:month:year | Day |
Arrival | 206 | 25 Jul 1994 | Mon |
Set-up and check-out | 206-214 | 25 Jul - 2 Aug 94 | Mon - Tues |
Operations Start | 214 | 2 Aug 94 | Tues |
ops 1 | 214 - 218 | 2 - 6 Aug 94 | Tues - Sat |
ops 2 | 218 - 221 | 6 - 9 Aug 94 | Sat |
ops 3 | 221 - 224 | 9 - 12 Aug 94 | Sat - Fri |
ops 4 | 224 - 227 | 12 - 16 Aug 94 | Fri - Tues |
ops 5 | 227 - 228 | 16 Aug 94 | Tues |
ops 6 | 228 - 231 | 16 - 19 Aug 94 | Tues - Fri |
ops 7 | 231 - 235 | 19 - 23 Aug 94 | Fri - Tues |
ops 8 | 235 - 256 | 23 Aug - 13 Sep 94 | Tues - Tues |
ops 9 | 256 - 260 | 13 - 17 Sep 94 | Tues - Sat |
ops 10 | 260 - 266 | 17 - 23 Sep 94 | Sat - Fri |
Teardown start | 267 | 24 Sep 94 | Sat |