T1: Site is located across Caribou stream at Watershed Field
Laboratory (old EPA trailer), cross open muskeg to hill near
Poker/Caribou stream, follow trail downstream along hillside,
trail turns into road, take right fork slightly uphill when road
splits, and the site is in the Black Spruce on the left where the
road ends. The CRREL site here consists of two 4.5 m deep holes
with 16 thermistors buried in each hole. Both of these thermistor
holes have a connector that a switch box is plugged into and
thermistor resistance is measured with an ohmmeter. There is a
Squirrel datalogger that records the two air temps (two
thermistors mounted on a mast covered by radiation shields) and
possibly some subsurface temps. The Squirrel uses two 6V
batteries. When we arrived to service this site, thermistors #1,
#10, #13, & #14 were showing infinite resistance (open) due
to animal damage at site, i.e., animal had chewed through
thermistor wires. There are Chinese thermometers laying on the
ground here. Side note: Tom Osterkamp from Geophysical Institute
has a heavily armored (animal protected) temperature site here.
Was unsure as to whether or not this site was in operation. This
site gathering air, soil, and permafrost temps.
Mets: Site is located between Watershed Field Lab and Wet/Dry
Collector site for NADP and is approximately 100 feet from road.
Foot traffic to this site is to be discouraged as there are
several sensors that monitor different surface effects around the
site. The first instruments encountered when visiting the site
are four Eppley's mounted on a tower that is approximately 10
feet high. The Eppley's are monitoring short and long wavelengths
that are direct and reflected. The arms that protrude from this
tower should not be approached because the ground surface is
being monitored (especially during the Winter). There is a
plastic conduit that feeds the wiring from the Eppley's to the
Campbell CR-10 located at the tripod. The tripod has several
different meteorological instruments located on it. It has two
anemometers, a sound wave snow depth sensor (that must be avoided
during the Winter), several pyrometers, and possibly other
instruments that I did not note. The next portion of this site is
solely related to temps and is located behind the tripod by about
25 feet. There are two air temp thermistors on a mast with
radiation shields, an MRC four foot thermistor probe that
measures temps from soil surface down into the permafrost, and
the this MRC probe has an external thermistor that is inserted
into the near-surface muskeg. There is a seperate Campbell CR-10
datalogger here recording just temps. All of Mets site to be
checked once weekly and data pulled, if convenient (if not
convenient, site can go for 4 months before data will start to be
overwritten - but this didn't appear to be set in concrete).
Battery (12V) pair at tripod and battery (12V) at temp mast
should be regularly checked. Virgil does not want data sent to
him every week. While he did not say how often he does want data
sent to him, maybe we should start a monthly data send procedure
with him?
N3: Site is located just off of road between camp and
intersection to C4/C- Peak/P6/Camp. Heading from Camp to the
intersection, site is on right side of road and approximately 50
feet from it. Carol did a sounding string across the trail that
leads to this site. Site consists of a one meter deep hole with a
white ABS tube sticking out of ground (that can be seen from
road) with a connector that a switch box is plugged into and
toermistor resistance is measured with an ohmmeter.
K25: Site is located on left side (going uphill) of Caribou Peak
road between C4/C- Peak/P6/Camp intersection and CT1600 precip
site. This is the first CRREL site, in a string of three, that is
located on the left side of the road between the intersection and
the CT1600 precip site. This site is approximately 200 feet
downhill from K24 site. Site is located in a hardwood stand.
There is a Weather Service enclosure (like the one we use for
Max/Min thermometers at the Confluence) that contains an air temp
probe here. There is a Squirrel datalogger here that records the
air temp. There is a white ABS tube that sticks out of the
ground. Inside this tube is a connector that a switch box is
plugged into and thermistor resistance is measured with an
ohmmeter. There are 14 thermistors in a 15m deep hole. When we
arrived at the site on 8/12/93, the Squirrel had dead batteries
and was no longer recording data. On 8/13/93 Dick replaced the
Squirrel batteries and placed it back into operation. There are
Chinese thermometers laying on the ground here.
K24: Site is located on the left side (going uphill) of Caribou
Peak road between C4/C- Peak/P6/Camp intersection and CT1600
precip site. This is the second CRREL site, in a string of three,
that is located on the left side of the road between the
intersection and the CT1600 precip site. This site is
approximately 200 feet downhill from K24 site. Site is located in
an evergreen (White Spruce?) stand. There is a Squirrel
datalogger here that records the air temp and three other
thermistors placed at depths of -1cm, -18cm, & -38cm. There
is a white ABS tube that sticks out of ground. Inside this tube
is a connector that a switch box is plugged into and thermistor
resistance is measured with an ohmmeter. There are 14 thermistors
in a 15m deep hole here. Thermistors #3, #10, & #13 give an
infinite resistance (open) due to animal damage. I need to repair
this damage and plan to on 8/23/93. Charlie will service this
site.
K23: Site is located on the left side (going uphill) of Caribou
Peak road between C4/C- Peak/P6/Camp intersection and CT1600
precip site. This is the third CRREL site, in a string of three,
that is located on the left side of the road between the
intersection and the CT1600 precip site. This site is
approximately 200 feet downhill from K24 site. Site is located in
an exposed scrub Alder stand. There is a white ABS tube that
sticks out of ground. Inside this tube is a connector that a
switch box is plugged into and thermistor resistance is measured
with an ohmmeter. There are 14 thermistors in a 15m deep hole
here. Charlie will service this site.
Caribou Peak: Site is located next to Wyoming gauge on Caribou
Peak. Facing this precip site at the end of the Caribou Peak
road, the CRREL site is approximately 25 feet to the right. Site
consists of a two channel Omnidata Datapod that is located inside
an ammo box at the base of a Weather Service enclosure. This is
Dick's site and it monitors air & ground temp. The air temp
thermistor is located inside the Weather Service enclosure. I am
to change the DSM inside the datapod next June and send to
Hanover. Dick requested that the site receive no attention during
the Winter as that could cause cold temperature damage.
K2: Site is located on the North side of Caribou Peak Summit near
where Trish did her greenhouse experiment. This is a buried
thermistor site. Has a white ABS tube that sticks up out of
ground. Inside this tube is a connector that a switch box is
plugged into and thermistor resistance is measured with an
ohmmeter. There is a tripod made up of branches that marks the
thermistor hole (the actual hole is covered by a plug of organic
material. Charlie will service this site.
K20: Site is located on the back side (North facing side) of
Caribou Peak. Access is down trail from Summit where Trish's
greenhouse experiment took place and CRREL's site K2 is located.
Trail is approximately 1/4 to 1/2 mile long and CRREL personnel
walk trail in Summer and snowmachine in Winter. Brush lays
downhill and would make 4-wheeler travel uphill difficult in the
Summer. This is a thermistor site. There are two thermistors on a
short mast with radiation shields that measure air temp. There is
a four foot MRC thermistor probe measuring organic, soil, and
permafrost temps here. All thermistors connect to a Campbell
CR-10 datalogger. As there are currently cables that are exposed
above ground, I am to animal proof this site, which is planned
for 8/24/93. I am expected to collect this data monthly (if
convenient) and periodically check the battery voltage (12V).
K20A: Site is located on the back side (North facing side) of
Caribou Peak. Access is down trail from K2 site on Summit to K20
site and then approximately 200 feet East of K20 site. This is a
buried thermistor site. Has a white ABS tube that sticks up out
of ground. Inside this tube is a connector that a switch box is
plugged into and thermistor resistance is measured with an
ohmmeter.
