NSF-AON - Stuefer

General Info - Emily's notes

Project re-started during COVID. Due to lengthy quarantines, site access was not possible. Toolik field staff helped.

• Imnavait Weir Notes

-Toolik field staff helps with breakup measurements. Most are unusable -I notice a shift in rating, PT data for 2021. Weir is jacking. Summer masurements were made by Toolik staff and LTER (Jason D.). -Sept 2021, Randy F. pounds down left bank side of weir about 8 inches. -Spring 2022, UAF student Finn and Toolik staff ET Traver (highly competent hydro tech) measured during spring breakup. -In August 2022, polar field services replaces weir wingwalls. September 2022 visit by emily shows significant erosion and loss of vegetation at weir. Multiple measurements are made. -In 2023, Emily and UAF student Lora made spring breakup measurements and Emily makes Sept 2023 measurements. Emily noticed about 4 cm of upward movement of the weir on the RB side since installed. RB side of weir is detached from wingwall and pounded down about 3-4 cm and resurveyed. Also noted potential frost jacking of the TBM1 of several cm. Polar field surveys tries to revegetate by bringing in tundra and placing it over eroded areas along wingwalls (sept 2023). -requested TBM1 DGPS static survey.

• UK Met Notes

-data loss winter 2022 due to low batteries. Batteries added spring 2023. Old batteries not removed. - Eppley radiometers suddenly stop working. Spring 2023 I could not figure out issue. They are on old multiplexor and a new one. Removed them to test in Fairbanks winter 2023. -after site visit May 2023, one or two soil temps stopped working. Possible problem with multiplexor going bad?

• Imnavait Met notes

-tipping bucket issues summer 2023 (under reported rainfall). Problem with pulse port. Switched pulseport from P2 to P1 and rain gauge works. -radiometers are working as of summer 2023. Replaced dessicant 2023.

• Green Cabin Lake Notes

-Bear damage, radio cable damaged and broken. Wind damaged. April 2022 Amanda Young visits site and tries to fix it. -April 2023, emily visits. Replaced anemometer. site incommunicado after my visit. Need to lower tripod. Ladder necessary to reach anemometer but cannot reach radio antennae to replace cable without breaking down the tripod. Very old style need to replace it.

• FBmet notes

Rain gauge not working properly. Need replacing or testing of pulse port.