NSF award 2539634 · University of Colorado at Boulder

CAREER: Global Characteristics, Predictability, and Future Projections of Polar Subtropical Jet Superposition Events

Final report due

28 October 2031

in 1,836 days · The award ends on 30 June 2031.

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award ending 2031-06-30 · Research.gov
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award ending 2031-06-30 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice20 Jun 2031in 1706 days
award ending 2031-06-30 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due28 Oct 2031in 1836 days
award ending 2031-06-30 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due28 Oct 2031in 1836 days
award ending 2031-06-30 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out28 Oct 2031in 1836 days
award ending 2031-06-30 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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NSF lists this award's end date as 30 June 2031.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 28 October 2031.

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Award card

Award number: 2539634
Period of support: 15 Jul 2026 – 30 Jun 2031
Amount: $912,177
Awardee: University of Colorado at Boulder, Boulder, CO
Program: Coupled & Large-Scale Dynamics, ESH-Earth System Hazards
Directorate: GEO

Abstract

Jet streams are narrow, rapidly moving bands of air that circle the earth near the outer edge of the tropics and close to the Arctic circle. On occasion, the separate polar and subtropical jet streams meander close together and merge into a single jet stream, producing a “jet superposition” with speeds up to 200mph. The high winds of jet superpositions can have severe impacts for aviation and cause extreme weather…

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