Meetings > PI / Science Team Meeting

Breakout Summary Report

 

ARM/ASR User and PI Meeting

How will shortwave radiometer updates impact science in ARM?
23 June 2021
11:00 AM - 1:00 PM
50
Laura Riihimaki, Manajit Sengupta, Pete Gotseff, Aron Habte

Breakout Description

The goal of this session is to provide a place for interaction between ASR scientists and ARM infrastructure members working on new shortwave radiometer instrumentation to provide feedback to ARM on priorities for new instrumentation or on data products that would be of use to the scientific community.

Main Discussion

The session contained two main sections. In the first half, discussion surrounded the work being done to upgrade SW broadband measurements at ARM sites. Pete Gotseff and Aron Habte presented information on new broadband SW instrumentation available that have lower error characteristics than the older instrumentation currently being used. Results comparing the cosine response of Eppley PSP, SPP, Kipp and Zonen CMP22, EKO MS-802, and Hukseflux SR25 and digital SR30 were shown. Diffuse comparison tests between CMP22, SPP, SR25, and Eppley 8-48s show agreement within 5% compared to a reference CMP22—a PSP would not do that well. Global measurements compared to a sum total from CMP22, SR25, MS80, and SPPs were shown for about a month of time. All have some cosine response, though generally remain within 5% of the reference. Nighttime offsets for CMP22, SR25, SPP, and 8-48 all show values generally well within 1-2 wats in a 6-month period.

The second half of the breakout session contained talks by three instrument manufacturers describing hyperspectral instrumentation that is available or soon will be. The talks were given by Steve Jones from Aerodyne about the TWST, John Wood about the HSP1, and Will Beuttell about the EKO 711.

View the full breakout session report here.

Key Findings

N/A

Issues

N/A

Needs

•Need to update QCRAD VAP for DC fans and potential new instrumentation.

Decisions

N/A

Future Plans

Several hyperspectral radiometers are now on the market or close to being on the market. The TWST has already been compared with the SASZE and CIMEL in a campaign at the SGP and TCAP AMF deployments with promising results. The hemispheric field of view instruments HSP1 and EKO 711 have not yet been compared with the SASHE, but both show promise for ARM uses. We would like to see ongoing discussion about the possibility of a comparison with these instruments in the next year or two to have more information about how ARM might want to proceed with spectral instrumentation.

Action Items

1.Determine scope and schedule for a spectral instrument intercomparison.
2.Decide on preferred state of the art instrumentation to upgrade AMF deployments