NSF award 2535828 · Cornell University

Collaborative Research: Investigating the role of non-continuum hydrodynamic interactions in the growth of droplets in warm cumulus clouds

Final report due

31 May 2029

in 956 days · The award ends on 31 January 2029.

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Decide about an extension3 Oct 2028in 716 days
award ending 2029-01-31 · Research.gov
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Extension request17 Dec 2028in 791 days
award ending 2029-01-31 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice21 Jan 2029in 826 days
award ending 2029-01-31 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due31 May 2029in 956 days
award ending 2029-01-31 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due31 May 2029in 956 days
award ending 2029-01-31 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out31 May 2029in 956 days
award ending 2029-01-31 · 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 31 January 2029.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 31 May 2029.

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Award card

Award number: 2535828
Period of support: 15 Feb 2026 – 31 Jan 2029
Amount: $340,000
Awardee: Cornell University, Ithaca, NY
Program: PMP-Particul&MultiphaseProcess
Directorate: ENG

Abstract

Warm, rain-bearing clouds play a vital role in the global water and energy balances that help regulate Earth's weather system. Predicting the effects of cumulus clouds (low level clouds with a puffy cotton-like appearance) on weather requires precise quantification of water droplet sizes and their growth rates. Current cloud models are limited by an inability to predict droplet growth rates and measured droplet size…

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