From CoCoRaHS:Measuring Reference ET . . . learn how you can be part of this national effort!
In 2012 CoCoRaHS launched a new opportunity for our observers to track the water cycle -- the literal "ups and downs" of water so to speak (over 100 observers participated). We are at it again for our third consecutive year. Since our observers already measure precipitation as it arrives at their locations (the down), we thought many would be interested to see how much of this water returns to the atmosphere? This is called evapotranspiration (going back up). For certain CoCoRaHS observers participating in 2015 will be a great opportunity to provide data for a whole new set of applications used in drought monitoring, irrigation and yard watering, remote sensing (satellite) and weather forecasting to name just a few.
There are several qualifications needed to become a CoCoRaHS observer for Reference ET, so don't feel bad if you are unable to participate. There will also be several things to consider on your part as you apply:
•1) We are looking for "ideal" locations (open exposures with surrounding vegetation that is representative of your area) and highly motivated observers (you have reported on a consistent daily basis for CoCoRaHS over time).
•2) You are up to the challenge of taking on a more complex daily observation.
•3) You, or a sponsoring organization are willing to make the substantial investment in purchasing this delicate instrument, the ETgage (which sells for around $222 at
www.weatheryourway.com, plus tax and shipping).
Some of you have already signed up, we thank you for your interest. If you have yet to do so and are up for this challenge, please contact Zach at Info@cocorahs.org with a photo of the site where you will place your gauge and he will follow up with you.
For those of you who want to learn more about Evapotranspiration and the "up side" of the water cycle, please check out the CoCoRaHS ET page at: "
ETo"