Microclimate is a sonic and visual
translation, or transcoding, of carbon microclimate / carbon absorption
and release pattern data on the Konza tall grass prairie in eastern
Kansas.
At Rannells Ranch, Jay measures the movement of CO2 between the prairie
and the atmosphere using a method called eddy covariance. This technique
requires two instruments: a sonic anemometer and an open-path CO2
analyzer. The sonic anemometer measures the velocity of air in all
three Cartesian coordinates by measuring the speed of sound between
paired transceivers. Data are collected very rapidly (10 times per
second). These data are coupled with results from the gas analyzer
(also collecting data 10 times per second) to calculate the number
of CO2 molecules moving vertically above the surface (towards the
surface or away from the surface). Jay has given us spreadsheets
of values from these measurements showing the decline in photosynthetic
activity from summer to winter. The eddy covariance data sample
for "Microclimate" is from August to December 2003. For ‘microclimate’ I
invited Nick Fox-Gieg to experiment with the data via Max/MSP/Jitter,
a program that is very well suited to data transpositions from number
sequences to time based and live sound and video.
Nick describes the composition process: “ First, I wrote
a perl script to convert the data from Christina's Excel spreadsheet
into a coll file readable by Max.The picture was created by running
the data through a Max patch that distorted 3D primitives according
to the incoming values, then drew the resulting shape slitscan-style,
line by line. I ran the patch four times, using different
settings for each section of the video. (Only the final section
used color information--I thought it would make an interesting
transition.)...The sound was created next, by running the completed
video through a new patch and measuring the difference in pixel
values between each frame and the next--in other words, the amount
of onscreen motion. This was used to trigger several dozen
oscillators and noise generators controlled in turn by the original
coll data. Unlike the video, which repeats the data four
times, the sound component uses only one repetition for the entire
piece. The final product was then recorded with Snapz screen capture
software and output to tape.”
Premiere: “Sonic Residues,” exhibition, SAC Art Gallery,
SUNY Stony Brook University , April 29th to May 12th, 2008.
Sonic Residues creates spaces to reflect on the relationships
shaped by sonic production and reproduction. The exhibition includes
works by Luke DuBois, Grady Gerbracht, Takafumi Ide, Stephen Lee,
Annea Lockwood, Nick Fox-Gieg and Christina McPhee, Nobuho Nagasawa,
Timothy Nohe, Jxel Rajchenberg, and others. In addition, projects
for personal media players are avaiable for download at www.sonicresidues.net
Organized by the Consortium for Digital Arts, Culture and Technology
(cDACT) Christa Erickson, Margaret Schedel, and Zabet Patterson.
“Microclimate by Nick Fox Gieg and Christina McPhee offers
a sonic and visual translation of a particular aspect of the landscape,
one that it is generally impossible for us to see directly: carbon
absorption and release on the tall grass prairie in eastern Kansas.
Transcoded, it becomes an energetic and building abstraction of
visuals and sound. Like Dubois’s Academy, it attempts to
make “large data,” of the sort that is processed and
handled by computers, somehow legible—visually and sonically,
on a human scale. Nevertheless, in its fading into the illegible
and the inaudible, it acknowledges, as do the flickering images
of Dubois, the impossibility of that task.” - Zabet Patterson
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