Putting The M In ARM

ARM’s Cloud Radars
Total Sky Imager and sun photometer.

Atmospheric Radiation Measurement. A facility 30 years strong. And the focus is on measurements. We take measurements. ARM collects measurements with a mission to improve the representation of clouds, aerosols (those tiny particles) and anything that impacts how sunlight travels to the earth and how the infrared radiation emitted from the earth travels our into space in any kind of earth simulation. ARM does not do the improving of simulations.

We target our data so users can do that themselves and use the funding from various agencies (including our sister program, the Atmospheric Systems Research program). ARM looks to scientists like me (yes I have a dual role here, I am supported by the ARM program to value add ARM radar measurements AND I am a scientist who proposes to ARM to deploy instruments) to suggest through a proposal mechanism where we should go to make the most impactful measurements.

Micropulse LIDAR.

ARM measurements are comprehensive. A simple breakdown could be instruments that measure the properties and chemistry of tiny particles, instruments that measure clouds, instruments that measure both and those that measure the air (the meteorology) in which they reside.

Those vital balloons.

I could go over each instrument and its purpose but the would be a lecture, heck a whole course, not a blog post. Some of my favourites are our cloud radars (of course) which shoot radio waves (super high frequency. Your wifi is ~3GHz our Ka Band radar is 35GHz! ) the micropulse LIDAR which instead of shooting radio waves shoots laser beams and, one of my all time favorites due to its simplicity, the Total Sky Imager (TSI).

Warm work!

The TSI cam from the idea of “hey I can see the whole sky in this shiny salad bowl”. It is my got when I am trying to work out “what happened?”. And, of course, as you have all garnered from previous posts, one thing ARM does very well is launch weather balloons.

So after taking all these photos in the morning (sweaty business even at 8am) I relocated back to the hotel for the weather briefing and ops call. The forecast was improving but is a real head scratcher for tomorrow. So we are calling an up day for tomorrow. The key will be moisture near the surface. If there is just a slight bit more than forecast we will get some nice storms. If not enough, no storms until a major chance comes through tomorrow night. Fingers crossed all!

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