![]() The lowest snow water content by far was just two inches in April 2015, when 10 out of 17 courses in and around Yosemite had no snow at all. These survey data provide information about mountain snowpack that can be used to identify trends that are valuable for park managers, hydrologists, climatologists, and water resource managers. The snow survey record in Yosemite is especially valuable because it dates back to 1930 for some snow courses, and because surveyors have taken great effort to assure consistency of measurement techniques and location. In addition to the monthly snow course data, many agencies monitor snow depth and water content using automated sensors. ![]() These sensors are usually installed at weather stations in middle and high elevations. The most common automated sensor is the snow pillow, a sensor like a large scale that uses the weight of the snow to estimate its water content. Although automated methods allow great temporal resolution and potential for high accuracy, these techniques are relatively new and do not have long historical records. Read " Snow Surveying," a Yosemite Nature Notes article by Duane D.Watch the Yosemite Nature Notes "Snow" episode, which features snow surveyors at work.California Cooperative Snow Surveys coordinates snow surveys throughout California and maintains a graph showing how this year's snowpack compares to previous years.It is a priority for surveyors to continue traditional snow course surveys in addition to more advanced techniques. Ultra Series UR75 5G Industrial Cellular RouterĪpart from easing the transition from 2G to LTE networks in recent years, LPWAN technologies are expected to open up new opportunities and address greenfield opportunities among value assets in smart city.Mini Series UR41 4G Industrial Cellular Router.VS330 ToF & PIR Bathroom Occupancy Sensor.EM500-SMTC Soil Moisture, Temperature & Electrical Conductivity Sensor.EM500-PT100 PT100 Industrial Temperature Sensor.EM500-SWL Submersible Water Level Sensor.EM500-UDL Ultrasonic Distance/Level Sensor.EM320-TH Temperature and Humidity Sensor.EM310-UDL Ultrasonic Distance/Level Sensor.ĪM307/AM308/AM319 Indoor Ambience Monitoring Sensor.AM104/AM107 Indoor Ambience Monitoring Sensor.AM103/AM103L Indoor Ambience Monitoring Sensor.Jacobs, the park’s assistant chief ranger, in January 1953.
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