06 December 2016

Peter Sinks

The TS-100 has been deployed for the past year on a weather station at a record-setting cold location in the contiguous United States - Peter Sinks, Utah. It is used to accurately measure the extremely cold air temperatures that occur at the site. The Peter Sinks site uses two yellow-bead thermistors and two PRTs in an Apogee TS-100 to make replicate measurements. Note the Apogee SP-230 all-season pyranometer in the picture as well.


A webinar of the TS-100 with more information on the Peter Sinks site can be found here. The Peter Sinks information starts at approximately 15:25.

 

Apogee TS-100 deployed at Peter Sinks, Utah

Application Summary


Summary
Used on a weather station at a record-setting cold location-Peter Sinks, Utah.

Sensors Used
TS-100 Aspirated Radiation Shield
ST-110 Thermistor
ST-300 PRT
SP-230 Pyranometer

Location
Peter Sinks, Utah

More Information
Peter Sinks Data Feed Site

Air Temperature Measurement Sensor Webinar

30 November 2016

Temperature Free-Air Controlled Enhancement (T-FACE)

This type of experiment applies a heating treatment to open-field plant canopies, simulating models of future warmer conditions. Dr. Bruce Kimball of the Arid-Land Agricultural Research Center and colleagues design and operate such experiments. In 2005 they developed a proportional–integrative–derivative control system for controlling the rise in temperatures. Apogee Infrared Radiometers provided the data on control and heated plot temperatures.

Dr. Kimball and his colleagues have developed hexagonal arrays of infrared heaters that produce uniform warming across 3-meter-diameter plots. The degree of warming is maintained using the proportional-integrative-derivative control system for controlling the rise in temperatures. Apogee Infrared Radiometers (housed in a white PVC pipe radiation shield in the photo) sense the canopy temperatures of the heated plots as well as unheated reference plots which are used by dataloggers to modulate the output of the heaters.

Similar infrared warming experimentation using this design and Apogee Infrared Radiometer sensors are also underway in Haibei, Qinghai, China; Cheyenne, WY; Ely and Cloquet, MN; Urbana, IL; Lexington, KY, and several other places around the world.

 

Image: Wheat warmed by infrared heaters is headed sooner in the "Hot Serial Cereal" experiment conducted by Dr. Bruce A. Kimball and colleagues at the USDA-ARS Arid-Land Agricultural Research Center and the University of Arizona at Maricopa, Arizona.

Application Summary


Summary
Simulating models of future warmer conditions by applying a heat treatment to open-field plant canopies. Apogee infrared radiometers provide the data and control the heated plot temperatures.

Sensors Used
Infrared Radiometer

Contributor
Dr. Bruce Kimball of the Arid-Land Agricultural Research Center

Location
Nebraska

Original Article
Kimball, B. A., 2005. Theory and performance of an infrared heater for ecosystem warming. Global Change Biology, 11(11):2041-2056.

Kimball BA, Conley MM, Wang S, Lin X, Luo C, Morgan J, Smith D (2008) Infrared heater arrays for warming ecosystem field plots. Global Change Biology 14, 309-320.